Download EDS 04-8000A Grid Transformer Schedules

Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Schedules - Index
1
SCHEDULE A - General Particulars of Definite Requirements ................................... 2
2
SCHEDULE B - Commencement Date and Date of Readiness for Inspection, Testing,
Access to Site, Delivery and Completion ................................................................. 4
3
SCHEDULE C - Manufacturers and Place of Manufacture, Testing and Inspection ..... 6
4
SCHEDULE D - General Particulars and Guarantees ................................................. 9
5
SCHEDULE E - Drawings, Data, Assembly, Operating and Maintenance Instructions,
Models and Samples ........................................................................................... 45
6
SCHEDULE F - Tests .............................................................................................. 49
7
SCHEDULE G - Items of Equipment with Prices...................................................... 51
8
SCHEDULE H - Summary of Price and Quantities for Definite Work ....................... 52
9
SCHEDULE J - Prices for Work at the Option of the Purchaser ................................ 53
10
SCHEDULE K - Access and Site Facilities ................................................................ 54
11
SCHEDULE L - Proposed Exceptions or Additions to the Standard .......................... 55
12
SCHEDULE M - List of Special Tools and Equipment to be Used ............................. 56
Page 1 of 56
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Grid Transformer Schedules
Grid Transformer Schedules
Substation:……………………
SCHEDULE A - General Particulars of Definite Requirements
Item
Description
1
Name of substation
2
Postal/delivery address
3
Designation of transformer(s)
UK Power Networks
Requirements
See Schedule K
SUMMARY OF DEFINITE REQUIREMENTS
4
Number of main transformers required …..………….
a) Method of cooling…………………………………...
b) Single or dual secondary windings………………..
c) Rated continuous output power (forced) .................... MVA
d) Rated voltage ratio on principal tap ................................ kV
e) Vector group symbols………………………………
f)
Method of HV neutral earthing…………………….
g) Method of LV neutral earthing……………………..
5
Number of auxiliary/earthing transformers
required…………..state which here.
a) Rated continuous output power (ONAN)……kVA
b) Rated voltage ratio on principal tap……………kV
c) Vector group symbols………………………………
6
Number of HV earthing resistors / reactors req.
State which here……
7
a)
Rated impedance ............................................................ 
b)
Rated short-time current ............................................... kA
c)
Rated duration of short-time current ............................... s
Number of LV earthing resistors / reactors req.
State which here……
a)
Rated impedance ............................................................ 
b)
Rated short-time current ............................................... kA
c)
Rated duration of short-time current ............................... s
8
Number of tap-change control marshalling boxes required .....
9
Number of cooler control marshalling boxes required
10
Number of remote voltage control cubicles required
Page 2 of 56
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1
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Substation:……………………
11
Number of sets of special tools and equipment (if any)
required .....................................................................................
12
Installation and site pre-commissioning required .....................
Note 1:
above.
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
For Item 4a), Supplier to determine appropriate method of cooling if not stated
Page 3 of 56
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Grid Transformer Schedules
Grid Transformer Schedules
Substation:……………………
SCHEDULE B - Commencement Date and Date of Readiness for Inspection,
Testing, Access to Site, Delivery and Completion
(To be completed by the Tenderer)
COMMENCEMENT DATE……………………….
Calendar Months
Item
Times from Commencement Date
1
Within which outstanding Schedule D information will be provided........
2
Within which the material will be ready for inspection and testing:
a) Main transformers ..............................................................................
b) Auxiliary transformers .........................................................................
c) HV earthing resistors / reactors ..........................................................
d) LV earthing resistors / reactors ...........................................................
e) Tap-change control marshalling boxes ...............................................
f)
Cooler control marshalling boxes........................................................
g) Standby voltage control cubicles ........................................................
3
Within which the Contractor will require access to the site for erecting:
a) Main transformers and ancillary equipment ......................................
b) Standby voltage control cubicles ........................................................
4
Within which the material will be delivered to the site:
a) Main transformers ..............................................................................
b) Auxiliary transformers .........................................................................
c) HV earthing resistors / reactors ..........................................................
d) LV earthing resistors / reactors ...........................................................
e) Tap-change control marshalling boxes ...............................................
f)
Cooler control marshalling boxes........................................................
g) Standby voltage control cubicles ........................................................
5
Within which the work will be completed, tested and ready for
continuous use...........................................................................................
Page 4 of 56
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2
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
PLANNING AND PROGRESS OF WORK
The works shall be carried out and completed in accordance with the Contract completion date
stated below. The Contractor shall submit a Plant Manufacture, Delivery and Erection Programme
for the approval of the Engineer.
Three copies of the above mentioned Programme shall be provided by the Contractor.
If at any time during the execution of the Contract the Contractor finds it necessary to modify any
approved Programme, the Contractor shall inform the Purchaser immediately and submit a
modified Programme for his approval. The submission of a modified Programme shall not have
effect as a claim by the Contractor for an extension of time for completion as provided by the
Conditions of Contract, nor shall the approval of such modified Programme have effect as the grant
of such extension of time fixed by the Contract for the completion of the Works.
Progress of Plant Manufacture in Contractor's Works
Progress of manufacture in relation to the detailed Plant Manufacture and Delivery Programme
shall be reported on an approved form at such frequency as may be required.
Access to the Contractor's and Sub-contractor's works shall be granted to the Purchaser at any
reasonable time for the purpose of ascertaining progress and checking quality.
Progress of Work on Site
Progress of Site Work in relation to the detailed Plant Erection Programme shall be indicated on an
approved form and submitted monthly or at such other intervals as required by the Purchaser.
These submissions shall include a schedule of Site Labour.
Delivery and Take-over Dates for Completed Work
Confirmation is required that the Tenderer can meet the following proposed Dates:
Factory Acceptance Dates
Take-over Dates
Damages for late delivery shall apply in accordance with Terms and Conditions.
Page 5 of 56
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Planning of Work
Grid Transformer Schedules
Substation:……………………
SCHEDULE C - Manufacturers and Place of Manufacture, Testing and
Inspection
(To be completed by the Tenderer)
Item
Manufacturer’s
Drawing Number
and/or Type
Designation
Manufacturer
Main transformers
Auxiliary
transformers
Neutral earthing
resistors
On-load tapchangers
HV bushings
LV Bushings
Neutral bushings
Insulating cylinders
Core plate
Copper
Aluminium
Steel tanks
Radiators
Pipework /
expansion devices
Oil
Oil valves
Oil pumps
Oil pump motors
Oil flow
indicators
Page 6 of 56
Place of
Manufacture
Place of Testing
and/or Inspection
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3
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Item
Manufacturer’s
Drawing Number
and/or Type
Designation
Manufacturer
Fans
Fan Motors
Gaskets for oil tight
joints
Pressure relief
devices
Conservators
Oil level indicators
Dehydrating
breathers
Rubber bag
Gas and oil
actuated relays
Tap-changer
control marshalling
cubicles
Cooler control
marshalling
cubicles
Winding
temperature
indicating devices
Current
transformers
Page 7 of 56
Place of
Manufacture
Place of Testing
and/or Inspection
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SCHEDULE C (CONTINUED)
Grid Transformer Schedules
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Substation:……………………
Item
Manufacturer’s
Drawing Number
and/or Type
Designation
Manufacturer
Standby
voltage control
cubicles
Voltage control
relays
Auxiliary relays
Voltmeters
Tap position
indicators
Control and
selector
switches
Material for
anti-vibration
mountings
Dissolved gas
in oil monitor
Oil dry out
device
Oil/water heat
exchanger
Page 8 of 56
Place of
Manufacture
Place of Testing
and/or Inspection
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SCHEDULE C (Continued)
Grid Transformer Schedules
Substation:……………………
4
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D - General Particulars and Guarantees
Item
Control, Indication, Alarm and
Trip
If Req
Type of Control,
Indication, Alarm and Trip
CONTROL
1
Local electrical control of
on-load tap-change
equipment
2
Standby electrical control
of on-load tap-change
equipment
3
Remote electrical control
of on-load tap-change
equipment
4
Remote voltage reduction
(load shed) in addition to
standby control
5
Local electrical control of
cooling equipment
6
Electrical control of
cooling equipment
INDICATIONS
7
Local tap position
indication
8
Standby tap position
indication
9
Remote tap position
indication
10
Standby main
transformer volts
11
Remote main transformer
volts
12
Local main tx winding
temperature
13
Remote main tx winding
temperature
Page 9 of 56
If to be Supplied
by Tenderer
Operating Supply
Voltage
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PART I GENERAL PARTICULARS OF CONTROLS, INDICATIONS, ALARMS AND TRIPS
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Item
Control, Indication, Alarm and
Trip
If Req
Type of Control,
Indication, Alarm and
Trip
ALARMS
14
Tap- changer faulty
15
Main transformer
winding temperature
16
Tap-changer
Temperature
17
Main gas and oil actuated
relay
18
Auxiliary transformer gas
and oil actuated relay
19
Neutral earthing reactor
gas and oil actuated relay
20
Pump fail
21
Fan fail
22
Dehydrating breather fail
23
Conservator low oil level
24
Gas-in-oil monitor Stage
1 and Stage 2
25
On-line moisture
management faulty
Page 10 of 56
If to be Supplied by
the Tenderer
Operating Supply
Voltage
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
SCHEDULE D, PART I (CONTINUED)
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Item
Control, Indication, Alarm
and Trip
If Req
Type of Control,
Indication, Alarm and
Trip
TRIPS
26
Main transformer
winding temperature
27
Main transformer oil
temperature
28
Tap-changer
temperature
29
Main gas and oil
actuated relay
30
Tap-changer oil
actuated relay
31
Auxiliary transformer
gas and oil actuated
relay
32
Neutral earthing
reactor gas and oil
actuated relay
33
Pressure relief device
Page 11 of 56
If to be Supplied by
the Tenderer
Operating Supply
Voltage
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SCHEDULE D, PART I (CONTINUED)
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D (Continued)
Item
Description
UK Power Networks
Requirements
OPERATING CONDITIONS
1
Location (Indoor or Outdoor)
Ambient air temperatures:
a)
2
Minimum daily ...........................................................……………………….….C
b) Maximum daily ............................................................... ………………….….C
c)
Maximum monthly average ..................................................... …………….C
d) Maximum daily annual average ............................................... …………….C
3
Load power factor ....................................................................................... P.U.
RATING
4
No-load voltage ratio on principal tap ........................................................ kV
Rated power (forced cooling):
5
a)
Rated continuous output .................................................................... MVA
b) Maximum ambient air temperature ....................................................... C
c)
Maximum hot spot temperature ............................................................ C
Rated power (ONAN):
6
a)
Rated continuous output .................................................................... MVA
b) Maximum ambient air temperature ....................................................... C
c)
Maximum hot spot temperature ............................................................ C
CER rated power:
7
a)
Rated continuous output .................................................................. MVA
b) Maximum ambient air temperature ..................................................... C
c)
Maximum hot spot temperature .......................................................... C
Rated power (normal cyclic loading):
a)
Rated output ..................................................................................... MVA
b) Duration .................................................................................................. h
8
c)
Maximum ambient air temperature ..................................................... C
d) Maximum hot spot temperature .......................................................... C
e)
Load cycle ............................................................................................... h
f)
Rated output (remaining cycle) ........................................................ MVA
ALTERNATIVE RATING
9
Whether dual voltage ratio is required...........................................................
10
Alternative rated voltage ratio ................................................................... kV
Page 12 of 56
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PART II (i) GENERAL PARTICULARS OF MAIN TRANSFORMERS
Grid Transformer Schedules
Substation:……………………
Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Description
UK Power Networks
Requirements
11
a)
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Rated power (forced cooling):
Rated continuous output .................................................................. MVA
b) Maximum ambient air temperature ..................................................... C
c)
Maximum hot spot temperature .......................................................... C
Rated power (ONAN):
12
a)
Rated continuous output .................................................................... MVA
b) Maximum ambient air temperature ....................................................... C
c)
Maximum hot spot temperature .......................................................... C
CER rated power:
13
a)
Rated continuous output .................................................................... MVA
b) Maximum ambient air temperature ....................................................... C
c)
Maximum hot spot temperature ............................................................ C
Rated power (normal cyclic loading):
a)
Rated output ..................................................................................... MVA
b) Duration .................................................................................................. h
14
c)
Maximum ambient air temperature ..................................................... C
d) Maximum hot spot temperature .......................................................... C
e)
Load cycle ............................................................................................... h
f)
Rated output (remainder of cycle) ................................................... MVA
WINDING CONNECTIONS
Delta connected tertiary winding, when to be designed for external loading:
15
a) Rated voltage ........................................................................................... kV
b) Rated continuous output (forced cooling) .......................................... MVA
Winding connections:
a)
HV windings ............................................................................ Star / Delta
b) LV windings ............................................................................. Star / Delta
16
17
c)
Tertiary windings ......................................................................................
d) BS vector group symbols ..........................................................................
e)
Whether links are required for alternative vector group .........................
f)
Whether links are required to change tapping range...............................
g)
Alternative BS vector group symbols ........................................................
Voltage limiting devices:
a)
Whether required .......................................................................................
b) Whether internal or external to main tank ................................................
c)
Type ............................................................................................................
PERFORMANCE CHARACTERISTICS
18
See Annex C
Impedance voltage envelope at 75C
Page 13 of 56
Grid Transformer Schedules
Substation:……………………
Description
19
Zero-sequence impedance:
a)
UK Power Networks
Requirements
as a % of positive-sequence component ...............................................%
b) as value of ohms/phase ....................................................... ohms/phase
20
90-100
Short circuit capability:
a)
Max. available at HV terminals (3 phase/1-phase)
..........................................................................................................MVA
b) Max. available at LV terminals (3-phase) .........................................MVA
c) At external terminals of the delta connected tertiary winding with
simultaneous HV and LV infeed shall not exceed ....................................MVA
refer to table 4 of standards unless higher ratings required.
21
Rated Insulation Level:
a)
22
132kV Lightniimpulse............................................................................ kV
550
b) 66kV Lightning impulse ......................................................................... kV
325
c)
33kV Lightning impulse ......................................................................... kV
170
d) 22kV Lightning impulse ......................................................................... kV
125
e)
20kV Lightning impulse ........................................................................ kV
125
f)
11kV Lightning impulse ........................................................................ kV
75
g)
6.6kV Lightning impulse ........................................................................ kV
60
Sound power levels:
a)
Transformer only (ONAN) ..................................................................... dBA
b) Transformer plus coolers (forced cooling) ............................................ dBA
VOLTAGE CONTROL
23
Method of variation of voltage ratio
On-Load
24
Category of voltage variation
VFVV / CFVV
25
Total range of variation of voltage ratio (expressed as a percentage of HV and
LV constant):
a) Plus............................................................................................................ %
b) Minus ........................................................................................................ %
26
Size of step .................................................................................................... %
27
Whether tap-change control by direct wire or selective system is required at
remote control point .........................................................................................
28
Automatic voltage control:
a)
Whether required ..........................................................................................
b) Whether group parallel control is required ...................................................
29
Space available for voltage compounding current transformer in LV
switchgear:
a) inside diameter ........................................................................................ mm
b) outside diameter ..................................................................................... mm
Page 14 of 56
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Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Description
UK Power Networks
Requirements
c) Axial length including clamps ................................................................... mm
30
Voltage ratio of voltage compounding VT ...................................................... V
31
Current ratio of voltage compounding CT ...................................................... A
32
Whether load shedding control by direct wire or selective system is required
from a remote control point ..............................................................................
33
Number of marshalling kiosk compartments ....................................................
34
Marshalling kiosk switched socket outlets:
a)
No. required ..............................................................................................
b) Type ..........................................................................................................
c)
35
Voltage .................................................................................................... V
Marshalling kiosk telephone jacks:
a) Whether required ........................................................................................
b) Type .............................................................................................................
TERMINATIONS
36
Whether delta connected tertiary winding is to be brought out to separate
terminations for external loading ......................................................................
37
Terminals:
a)
Bushing insulators or separable cable connectors (SCC) for live terminals:
i)
HV windings ...........................................................................................
ii)
LV windings ............................................................................................
Bushing
iii)
Delta connected tertiary windings .........................................................
SCC
iv)
Auxiliary transformer .............................................................................
Not Applicable
b) Bushing insulators or separable cable connectors (SCC) for neutral
terminals:
i)
SCC
HV ...........................................................................................................
ii) LV............................................................................................................
Bushing
SCC
Page 15 of 56
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Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Description
38
Separable cable connector (SCC) details:
a)
UK Power Networks
Requirements
HV line termination:
Not Applicable
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cable cores per SCC bushing .............................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor ...........................................mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC ..........................................................
b) LV line termination:
c)
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cable cores per SCC bushing .............................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor ...........................................mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC ..........................................................
Cu XLPE
Tertiary line termination:
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cable cores per SCC bushing .............................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor ...........................................mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC ..........................................................
Not Applicable
d) Auxiliary transformer line termination:
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cable cores per SCC bushing .............................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor ...........................................mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC ..........................................................
Page 16 of 56
Cu XLPE
Not Applicable
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Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Description
e)
f)
UK Power Networks
Requirements
HV neutral termination:
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cores per SCC bushing .......................................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor .......................................... mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC ..........................................................
LV neutral termination:
i)
Open or enclosed ................................................................................
ii)
Number of SCC bushings per phase ....................................................
iii)
Number of cable cores per SCC bushing .............................................
iv)
Type of cable .......................................................................................
v)
Cross sectional area of conductor .......................................... mm
vi)
Direction of cable entry .......................................................................
vii)
CENELEC type interface for SCC
viii) Number of neutral bushings................................................................
39
Whether CT accommodation is required on bushing insulators rated at 132 kV
and below:
a)
HV ..................................................................................................................
b) LV ...................................................................................................................
Whether neutral current transformers are to be provided:
40
a)
HV ..................................................................................................................
b) LV ...................................................................................................................
41
Whether interposing CTs are required for main protection
COOLING
42
Cooling designation
43
Arrangement of coolers:
a)
Tank attached ..........................................................................................
b) Separate free-standing ............................................................................
Page 17 of 56
Cu XLPE
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Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Description
44
Number and rating of coolers per transformer:
a)
UK Power Networks
Requirements
Number and rating ..................................................................................
b) Oil/air coolers ..........................................................................................
c)
Oil/water coolers .....................................................................................
45
The maximum allowable winding hot spot temperature ...............................
46
The maximum top oil temperature rise at any tapping position and supplying
rated power at rated secondary voltage ........................................................
47
Whether valves for oil filtering require flexible hose adapters ......................
48
Size of flexible hose adapter ........................................................................ mm
50
OIL PRESERVATION
49
Oil preservation system:
a) Conservator fitted with refrigeration type breather ........................
No
b) Conservator fitted with moisture absorbing medium type breather
(* Delete as appropriate) ...............................................................
Regenerative /
Traditional*
c) Conservator fitted with diaphragm ..................................................
50
d) Conservator fitted with bag or bladder ............................................
Yes
UK Power Networks preference for refrigeration type breather:
NA
a) Manufacturer ....................................................................................
b) Model ................................................................................................
c) Type ...................................................................................................
51
On line moisture management system:
a) Whether required .............................................................................
Yes
b) Manufacturer ....................................................................................
Bowden or Omnia
c) Model ................................................................................................
RT9
d) Type ...................................................................................................
GENERAL
52
Losses:
a) The maximum permitted no-load loss of each main transformer on
the principal tap .......................................................................... kW
b) The maximum permitted load loss of each main transformer at a
reference temperature of 75C over a variation of tapping ranges.
Average of loss at tap 1, 7, 13, 19.. ............................................. kW
53
Winding temperature indicators:
a) Total number required ......................................................................
b) Location .............................................................................................
Page 18 of 56
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Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Description
i)
UK Power Networks
Requirements
HV windings ................................................................................
ii) LV winding ..................................................................................
c) Type:
i)
Mercury tilt-switch .....................................................................
ii) Micro-switch ...............................................................................
iii) Electronic ....................................................................................
d) If electronic type, preferred:
i)
Manufacturer .............................................................................
ii) Type ............................................................................................
iii) Model .........................................................................................
e) Settings:
i)
Coolers switch-on ................................................................... C
ii) Coolers switch-off ................................................................... C
iii) Winding temperature alarm ................................................... C
90
iv) Winding temperature trip ...................................................... C
130
54
Size of direct wire electrical winding temperature indicator
Na
55
Whether anti-vibration pads are required ..............................................
Yes
56
Whether a noise enclosure is required from the outset .........................
57
Number of copies of Operating and Maintenance Instructions required
.................................................................................................................
58
Whether core and frame earth connections are to be brought out to
bushings ...................................................................................................
59
Whether provision is to be made for fitting a dissolved gas-in-oil
monitor ....................................................................................................
60
Whether a dissolved-gas-in-oil monitor is required from the outset .....
61
UK Power Networks preference for dissolved-gas-in-oil monitor:
62
3 hard copy
1 electronic copy
Yes
a) Manufacturer ....................................................................................
GE
b) Type ...................................................................................................
Hydran
c) Model ................................................................................................
M2
Whether multipair cables for SCADA are to ENATS 09-06 or DEF 61-12
Part 5 standards.......................................................................................
Page 19 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D, PART II (i) (Continued)
Mounted in 132kV or turrets
63
(Refer to Item 20 for system fault levels for which the CT shall be
compatible)
a) Purpose................................................................................................
b) Quantity...............................................................................................
c) Rated primary/secondary current .................................................... A
d) Minimum knee-point voltage (Vk) ................................................... V
e) Maximum secondary winding resistance ......................................... 
f) Maximum secondary excitation current at Vk/2 .............................. A
g) Rated output .................................................................................. VA
h) Rated accuracy class/accuracy limit factor .........................................
i) Continuous Thermal Rating current @ 40°C .......................................
j) Type
k) Turns ratio ...........................................................................................
a) Purpose................................................................................................
b) Quantity...............................................................................................
c) Rated primary/secondary current .................................................... A
d) Minimum knee-point voltage (Vk) ................................................... V
e) Maximum secondary winding resistance ......................................... 
f) Maximum secondary excitation current at Vk/2 .............................. A
g) Rated output .................................................................................. VA
h) Rated accuracy class/accuracy limit factor .........................................
i) Continuous Thermal Rating current @ 40°C .......................................
j) Type
k) Turns ratio ...........................................................................................
a) Purpose................................................................................................
b) Quantity...............................................................................................
c) Rated primary/secondary current .................................................... A
d) Minimum knee-point voltage (Vk) ................................................... V
e) Maximum secondary winding resistance ......................................... 
Page 20 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
HV LINE CURRENT TRANSFORMER CHARACTERISTICS
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
f) Maximum secondary excitation current at Vk/2 .............................. A
h) Rated accuracy class/accuracy limit factor .........................................
i) Continuous Thermal Rating current @ 40°C .......................................
j) Type
k) Turns ratio ...........................................................................................
HV NEUTRAL CURRENT TRANSFORMER CHARACTERISTICS
64
(Refer to Item 20 for system fault levels for which the CT shall be
compatible)
a) Purpose................................................................................................
b) Quantity...............................................................................................
c) Rated primary/secondary current .................................................... A
d) Minimum knee-point voltage (Vk) ................................................... V
e) Maximum secondary winding resistance ......................................... 
f) Maximum secondary excitation current at Vk/2 .............................. A
g) Rated output .................................................................................. VA
h) Rated accuracy class/accuracy limit factor .........................................
i) Continuous Thermal Rating current @ 40°C .......................................
j) Type
k) Turns ratio ...........................................................................................
HV LINE CURRENT TRANSFORMER CHARACTERISTICS Mounted in 66kV or turret
65
(Refer to Item 20 for system fault levels for which the CT shall be
compatible)
a) Purpose................................................................................................
b) Quantity...............................................................................................
c) Rated primary/secondary current .................................................... A
d) Minimum knee-point voltage (Vk) ................................................... V
e) Maximum secondary winding resistance ......................................... 
f) Maximum secondary excitation current at Vk/2 .............................. A
g) Rated output .................................................................................. VA
h) Rated accuracy class/accuracy limit factor .........................................
i) Continuous Thermal Rating current @ 40°C .......................................
j) Type
k) Turns ratio ...........................................................................................
HV NEUTRAL CURRENT TRANSFORMER CHARACTERISTICS
Page 21 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
g) Rated output .................................................................................. VA
Grid Transformer Schedules
Substation:……………………
66
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
(Refer to item 20 for system fault levels for which the CT shall be compatible)
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
LV LINE CURRENT TRANSFORMER CHARACTERISTICS - Mounted in 33kV or turret
67
(Refer to Item 20 for system fault levels for which the CT shall be compatible)
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
Page 22 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
a) Purpose ...........................................................................................................
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
c) Rated primary/secondary current ............................................................... A
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio
LV NEUTRAL CURRENT TRANSFORMER CHARACTERISTICS
Page 23 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
d) Minimum knee-point voltage (Vk) .............................................................. V
Grid Transformer Schedules
Substation:……………………
68
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
(Refer to Item 20 for system fault levels for which the CT shall be compatible)
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
LV LINE CURRENT TRANSFORMER CHARACTERISTICS - Mounted in 11kV or turret
69
(Refer to Item 20 for system fault levels for which the CT shall be compatible)
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
Page 24 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
a) Purpose ...........................................................................................................
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
a) Purpose ...........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
g) Rated output.............................................................................................. VA
h) Rated accuracy class/accuracy limit factor ....................................................
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio
LV NEUTRAL CURRENT TRANSFORMER CHARACTERISTICS
70
(Refer to Item 20 for system fault levels for which the CT shall be compatible)
a) Purpose ...........................................................................................................
b) Quantity..........................................................................................................
c) Rated primary/secondary current ............................................................... A
d) Minimum knee-point voltage (Vk) .............................................................. V
e) Maximum secondary winding resistance ....................................................
f) Maximum secondary excitation current at Vk/2 ......................................... A
Page 25 of 56
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b) Quantity..........................................................................................................
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
g) Rated output.............................................................................................. VA
i) Continuous Thermal Rating current @ 40°C ..................................................
j) Type
k) Turns ratio ......................................................................................................
Page 26 of 56
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h) Rated accuracy class/accuracy limit factor ....................................................
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D (Continued)
Item
Description
UK Power Networks
Requirements
RATING
1
Auxiliary or Earthing/Auxiliary transformer
1a
Rated Continuous output (ONAN) ............................................ kVA
2
Rated voltage ratio .................................................................... kV
3
Winding connections:
a) HV windings ............................................................................
b) LV windings .............................................................................
c) BS Vector group symbols ........................................................
PERFORMANCE CHARACTERISTICS
4
Impedance voltage at 75°C on principal tap ...........................................%
5
Short circuit capability:
a) Max available at HV terminals (3 phase) ........................................... kA
b) Max available at LV terminals (3-phase) ........................................... kA
VOLTAGE CONTROL
6
Method of variation of voltage control
7
Total range of variation of voltage ratio (expressed as a percentage of
HV with LV constant):
a) Plus .................................................................................................. %
b) Minus .............................................................................................. %
8
Size of step ........................................................................................... %
TERMINATIONS
9
Terminals:
a)
Bushing insulators, cable boxes or separable cable connectors (SCC)
for live terminals:
i) HV .........................................................................................................
ii) LV .........................................................................................................
b) Bushing insulators, cable boxes or separable cable connectors (SCC)
for neutral terminals
i) HV .........................................................................................................
ii) LV .........................................................................................................
Page 27 of 56
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PART II (ii) GENERAL PARTICULARS OF AUXILIARY TRANSFORMERS
Grid Transformer Schedules
Substation:……………………
Description
10
Cable box or separable cable connector details:
a)
UK Power Networks
Requirements
Higher voltage ..................................................................................
b) Lower voltage ...................................................................................
i) Number of switchfuses ........................................................................
ii) Number of poles per box / SCCs per pole ...........................................
iii) Number of cores per pole / SCC .........................................................
iv) Type of cable ......................................................................................
v) Cross sectional area of conductor ............................................... mm2
vi) Direction of cable entry ......................................................................
vii) Type of gland .....................................................................................
viii) Filling medium for cable box ............................................................
COOLING
11
Cooling designation
12
Arrangement of coolers:
a)
Tank attached...................................................................................
b) Separate free-standing.....................................................................
13
Whether valves for oil filtering require flexible hose adapters
14
Size of flexible hose adapter ............................................................... mm
Page 28 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D (Continued)
Item
Description
UK Power Networks
Requirements
GENERAL
1
Whether resistor of reactor is required* ..................................................
2
Whether mounted on transformer tank or separate ................................
RATING
3
Rated Continuous current (AN) ............................................................... A
4
Rated Impedance .............................................................................. ohms
5
Rated Loaded Time ...................................................................................s
6
Line voltage of system to which resistance will be connected ............. kV
7
Design voltage of external and internal high voltage bushings ............ kV
8
Voltage that can be withstood for one minute dry by external and
internal high voltage bushings ............................................................... kV
9
Minimum wet flashover voltage for external high voltage bushing ...... kV
10
Minimum wet flashover voltage for internal high voltage support
bushings ................................................................................................. kV
11
Routine Test Voltage – 1 minute dry ..................................................... kV
12
Continous current rating
* If resistor is required then complete Schedule D Part II (iv)
Page 29 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
PART II (iii) GENERAL PARTICULARS OF NEUTRAL EARTHING RESISTORS
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D (Continued)
Item
Description
UK Power Networks
Requirements
PERFORMANCE CHARACTERISTICS
1
Rated Insulation Level (separate source withstand voltage):
a.
Rated Lightning Impulse withstand voltage (peak) to earth ............. kV
b. Rated one minute power frequency withstand voltage (rms) to earth kV
2
Rated continuous current ........................................................................... A
3
Rated impedance ....................................................................................... 
4
Rated circuit capability:
a) Rated short time current ...................................................................... A
b) Rated duration of short time current....................................................s
TERMINATIONS
5
Terminals:
Bushing insulator, cable boxes or separable cable connectors (SCC) for
transformer side terminals:
a)
Transformer side ...................................................................................
b) Earthed side ..........................................................................................
6
Whether current transformers are to be provided in reactor:
a)
Transformer side .................................................................................
b) Earthed side .......................................................................................
c)
Arrangement of current transformers ...............................................
COOLING
7
Cooling designation
8
Arrangement of coolers:
a)
Tank attached.....................................................................................
b) Separate free-standing..........................................................................
9
Whether valves for oil filtering require flexible hose adapters
10
Size of flexible hose adapter ................................................................ mm
Page 30 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
PART II (iv) GENERAL PARTICULARS OF NEUTRAL EARTHING REACTORS
Grid Transformer Schedules
Substation:……………………
Description
UK Power Networks
Requirements
REACTOR/RESISTOR MOUNTED CURRENT TRANSFORMERS
11.
a) Purpose ......................................................................................................
b) Quantity.....................................................................................................
c) Rated primary/secondary current .......................................................... A
d) Minimum knee-point voltage (Vk) ......................................................... V
e) Maximum secondary winding resistance ...............................................
f) Maximum secondary excitation current at Vk/2 .................................... A
g) Rated output......................................................................................... VA
h) Rated accuracy class/accuracy limit factor ...............................................
i) Continuous Thermal Rating current @ 40°C .............................................
j) Type
a)
12
k) Turns ratio .....................................................................................A
a) Purpose ......................................................................................................
b) Quantity.....................................................................................................
c) Rated primary/secondary current .......................................................... A
d) Minimum knee-point voltage (Vk) ......................................................... V
e) Maximum secondary winding resistance ...............................................
f) Maximum secondary excitation current at Vk/2 .................................... A
g) Rated output......................................................................................... VA
h) Rated accuracy class/accuracy limit factor ...............................................
i) Continuous Thermal Rating current @ 40°C .............................................
j) Type
a)
13
k) Turns ratio .....................................................................................A
a) Purpose ......................................................................................................
b) Quantity.....................................................................................................
c) Rated primary/secondary current .......................................................... A
d) Minimum knee-point voltage (Vk) ......................................................... V
e) Maximum secondary winding resistance ...............................................
f) Maximum secondary excitation current at Vk/2 .................................... A
g) Rated output......................................................................................... VA
h) Rated accuracy class/accuracy limit factor ...............................................
i) Continuous Thermal Rating current @ 40°C .............................................
j) Type
a)
k) Turns ratio .....................................................................................A
Page 31 of 56
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Item
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Substation:……………………
SCHEDULE D (Continued)
Item
Descriptions
UK Power Networks
Requirements
PARTICULARS OF ACCESS AND INSTALLATION
1
Designated location ...........................................................
2
Clear opening of plant hatch ....................................... mm
3
Minimum headroom ..................................................mm
4
Maximum permissible mass of heaviest transport unit kg
5
Whether cubicles are to be arranged for top or bottom
cable entry ........................................................................
6
Whether cubicles are to be installed on a solid floor or
on a computer floor with removable floor panels ............
7
Whether cubicle heating is required .................................
8
Whether separate analogue voltmeter and tap position
indicator is required ..........................................................
9
AVC relay:
a)
Number required ......................................................
b)
Manufacturer ...........................................................
VA Tech
c)
Type ..........................................................................
Super Tapp
d)
Model .......................................................................
Version 5
Note :
Minimum headroom below lifting hook, or in access route to final position,
whichever is the lesser.
Note :
A hoist suitable for the heaviest item of auxiliary plant will be supplied and installed
by the Purchaser
Page 32 of 56
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PART II (v) GENERAL PARTICULARS OF REMOTE VOLTAGE CONTROL CUBICLES
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D (Continued)
(To be completed by the Tenderer)
Item
Description
Value
Unit
PERFORMANCE CHARACTERISTICS
1.0
Guaranteed rated continuous output power (ONAN)
MVA
2.0
Guaranteed rated continuous output power (Forced cooling)
MVA
3.0
No-load Loss (excl. cooling plant loss)
a. On principal tap
kW
b. At max excitation (1.9 Tesla)
kW
4.0
Cooling Plant Loss
kW
5.0
Load Losses at rated continuous output power (forced cooling) at a
reference temperature of 75°C:
a. On tapping positions:
5.1
(i) HV/LV loss on minimum tapping position
kW
5.2
(ii) HV/LV loss on Tap number 7
kW
5.3
(iii) HV/LV loss on Tap number 13
kW
5.4
(iv) HV/LV loss on maximum tapping position
kW
b. On tapping positions for maximum load loss:
5.5
(i)Tap number
Tap No.
5.6
(ii) HV/LV loss
kW
6.0
Impedance at Forced cooling rated continuous output at 75°C:
a. Impedance on principal tap:
Tap No.
(i) HV/LV
%
b. Minimum impedance on minimum tap:
Tap No.
(i) HV/LV
%
c. Maximum impedance on minimum tap:
Tap No.
(i) HV/LV
%
d. Minimum impedance on maximum tap:
Tap No.
(i) HV
%
e. Maximum impedance on maximum tap:
Tap No.
6.5
(i) HV/LV
%
6.6
Zero Sequence impedance
6.1
6.2
6.3
6.4
6.7
%
rd
Maximum 3 harmonic component of phase voltage
Page 33 of 56
%
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
PART III (i) GUARANTEES FOR MAIN TRANSFORMER
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE D, Part III (i) GUARANTEES FOR MAIN TRANSFORMER (Continued)
Description
Value
Unit
7.0
Maximum volts per step as seen by on-load tap changer at system
highest volts:
7.1
a. At maximum rating end of range
kV
7.2
b. At minimum rating end of range
kV
8.0
Hottest spot winding temperature on most onerous tap position (See
Schedule D part II (i) for average ambient air temperature)
8.1
a. Tap Number
Tap No.
8.2
b. HV at Forced cooling rated continuous output
°C
8.3
c. LV at Forced cooling rated continuous output
°C
9.0
Oil and Winding temperature rises on most onerous tap position (See
Schedule D part II (i) for average ambient air temperature)
a. At ONAN rated continuous output (Item 1)
Tap No.
9.1
(i) Top Oil rise
°C
9.2
(ii) Mean Oil rise
°C
9.3
(iii) Average winding rise
°C
b. During Cyclic loading
9.4
(i) Top Oil rise
°C
9.5
(ii) Mean Oil rise
°C
9.6
(iii) Average winding rise
°C
Item
10.0
Description
Value
Unit
Maximum observable oil temperature
(See Schedule D part II (i) for average ambient air temperature)
a. At ONAN rated continuous output
10.1
(i) Top Oil
°C
10.2
(ii) At inlet to cooler
°C
10.3
(iii) At outlet to cooler
°C
b. During normal cyclic loading
10.4
(i) Top Oil
°C
10.5
(ii) At inlet to cooler
°C
10.6
(iii) At outlet to cooler
°C
Page 34 of 56
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Item
Substation:……………………
Item
Description
11.0
Proportion of sum of iron and copper losses at forced cooling rated
output which will be supplied during temperature rise test
12.0
Calculated winding capacitance
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
%
a. Approximate series capacitance of each phase winding
12.1
i) HV
pF
12.2
ii) LV
pF
b. Approximate shunt capacitance to earth of each phase winding with
core and tank earthed
12.3
i) HV to earth with LV winding earthed
pF
12.4
ii) LV to earth with HV winding earthed
pF
12.5
c. Approximate capacitance HV to LV winding earthed
pF
Item
Description
13.0
Guaranteed sound power level ('A' weighting):
13.1
a. Transformer tank
dB
13.2
b. Cooler
dB
13.3
c. Method of noise reduction
Value
Unit
MAGNETIC CIRCUIT
14.0
Core Construction:
14.1
a. Taped/banded/bolted limbs
14.2
b. Taped/banded/bolted yokes
14.3
c. Taping/banding material
14.4
d. Number of limbs
14.5
e. Number of limbs wound
15.0
Insulation of:
15.1
a. Core bolts
15.2
b. Core bolt washers
15.3
c. Side plates
15.4
d. Core Laminations
16.0
Flux density in iron (Nominal value at normal voltage and frequency on
principal tap):
16.1
a. Wound limbs
Tesla
16.2
b. Yokes
Telsa
16.3
c. Unwound limbs
Telsa
16.4
d. Shields
Telsa
17.0
Whether tank or other flux shields are incorporated
Page 35 of 56
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Grid Transformer Schedules
Substation:……………………
Item
Description
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
18.0
Type and arrangement:
18.1
a. HV Windings
18.2
b. LV windings
18.3
c. Tapping windings
18.4
d. Tertiary windings
18.5
e. Winding arrangements (i.e.. Core/…./…./…./….)
19.0
Arrangement of tapping (e.g. linear, coarse/fine, reversing):
20.0
Conductor material for:
20.1
a. HV windings
20.2
b. LV windings
20.3
c. Tapping windings
20.4
d. Tertiary windings
21.0
Conductor insulation for:
21.1
a. HV windings
21.2
b. LV windings
21.3
c. Tapping windings
21.4
d. Tertiary windings
22.0
Oil circulation (e.g. natural, partially directed, directed)
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
WINDINGS
a. To windings:
22.1
i) HV windings
22.2
ii) LV windings
22.3
iii) Tapping windings
22.4
iv) Tertiary windings
b. Through windings
22.5
i) HV windings
22.6
ii) LV windings
22.7
iii) Tapping windings
22.8
iv) Tertiary windings
23.0
Short circuit capability:
a. Potential axial thrust for worst fault condition of each winding:
23.1
i) HV windings
t
23.2
ii) LV windings
t
23.3
iii) Tapping windings
t
Page 36 of 56
Substation:……………………
Item
Description
23.4
iv) Tertiary windings
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
t
b. Coil clamping short circuit withstand capacity:
23.5
i) HV windings
t
23.6
ii) LV windings
t
23.7
iii) Tapping windings
t
23.8
iv) Tertiary windings
t
23.9
c. Most onerous earth fault condition, HV or LV, for transformers with
delta connected tertiary
24.0
Current density in windings at normal tap:
24.1
a. HV windings at forced cooling rated cont. output
A/mm2
24.2
b. LV. windings at forced cooling rated cont. output
A/mm2
24.3
c. Tapping windings at forced cooling rated cont. output
A/mm2
24.4
d. Tertiary windings at forced cooling rated cont. output
A/mm2
24.5
e. In HV or LV windings detailed in Item 23.9 above most onerous earth
fault condition
A/mm2
24.6
f. Tertiary windings for condition as (e) above
A/mm2
25.0
Weight of components:
25.1
Weight of copper
t
25.2
Weight of core
t
NA
t
TANK AND COOLER
26.0
Tank material
27.0
Tank thickness
27.1
a. Sides
mm
27.2
b. Base
mm
27.3
c. Cover
mm
28.0
Thickness of radiator plates and/or cooling tubes
mm
29.0
Total volume of oil required (including cooling system)
litres
30.0
Volume of oil to be removed (if applicable)
30.1
a. To effect in situ change of HV bushing
litres
30.2
b To effect in situ change of LV bushing
litres
31.0
Total volume of oil in conservator(s)
litres
Page 37 of 56
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Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Item
Description
Value
Unit
32.0
Volume of oil in (each) conservator between highest and lowest visible
levels
litres
33.0
Height of oil at maximum level in the conservator (s) above pad level
m
34.0
Total number of cooler oil pumps under service conditions
35.0
Output of each cooler oil pump under service conditions:
35.1
a. Volume of oil
litres/s
35.2
b. Approximate head of oil
m
36.0
Continuous rating of each cooler oil pump motor
shaft kW
37.0
Starting current of each cooler pump motor
A
38.0
Total number of cooler fans
39.0
Rated normal output of each cooler fan:
39.1
a. Volume of air
m3/s
39.2
b. Approximate head of air
mm water
gauge
40.0
Nominal diameter of cooler fans
mm
41.0
Speed of cooler fans
rpm
42.0
Continuous rating of each cooler fan motor
shaft kW
43.0
Starting current of each cooler fan motor
A
GENERAL
44.0
Filling medium for transport
45.0
Total weight as installed in service, including cooling plant, all fittings and
oil:
45.1
a. Quotation estimate
t
45.2
b. Final design calculation
t
46.0
Weight arranged for transport, excluding vehicle
t
47.0
Weight of each bushing insulator (if applicable):
47.1
a. HV
kg
47.2
b. HV neutral
kg
47.3
c. LV
kg
47.4
d. LV neutral
kg
48.0
Overall Dimensions of main transformer:
48.1
a. Length
mm
48.2
b. Width
mm
48.3
c. Height
mm
Page 38 of 56
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Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Item
Description
Value
Unit
49.0
Overall Dimensions of cooler:
49.1
a. Length
mm
49.2
b. Width
mm
49.3
c. Height
mm
50.0
Transport Dimensions:
50.1
a. Length
mm
50.2
b. Width
mm
50.3
c. Height
mm
51.0
Type of safety device to restrict falling
52.0
Manufacturer
53.0
Type Designation
54.0
Ratings:
54.1
a. Rated through current
A
54.2
b. Maximum rated through current
A
54.3
c. Rated step capacity
kVA
54.4
d. Rated step voltage
V
54.5
e. Maximum rated step voltage
V
54.6
f. Short circuit current (for 3 second duration)
rms kA
54.7
g. Rated frequency
Hz
h. Rated insulation level
54.8
(i) Power frequency withstand voltage (1 min)
V
54.9
(ii) Phase to phase
V
54.10
(iii) Phase to earth
V
54.11
(iv) Busbar adjacent terminals
V
54.12
(v) Across switch
V
i. Impulse withstand voltage (1.2/50 microsecond)
54.13
(i) Phase to earth
V
54.14
(ii) Phase to phase
V
54.15
(iii) Between adjacent terminals
V
54.16
(iv) Across switch
V
55.0
Maximum number of tapping positions
56.0
Tested no load mechanical endurance (No of operations)
Page 39 of 56
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Grid Transformer Schedules
Substation:……………………
Item
Description
57.0
Number of on-load tap change operations before:
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
a. arcing contact
57.1
(i) maintenance
57.2
(ii) replacement
57.3
b. oil inspection
58.0
Design
58.1
a. Type of operation
58.2
b. Regulation
59.0
Oil:
59.1
a. Quantity of oil
59.2
b. Mechanical withstand of barrier board
59.3
c. Maximum working pressure when oil filled
59.4
d. Material of contacts
59.5
e. Drive Motor
59.6
f. No of phases
59.7
(I) rated voltage
V
59.8
(ii) rated frequency
Hz
59.9
(iii) starting current
A
59.10
(iv) running current
A
59.11
(v) type
60.0
Design of protection of enclosures
IP
132kV LINE CURRENT TRANSFORMERS
61.0
Purpose:
61.1
a. Rated primary/secondary current
A
61.2
b. Rated frequency
Hz
61.3
c. Rated output
VA
61.4
d. Rated knee point voltage (Vk)
VA
61.5
e. Maximum secondary resistance
ohms
61.6
f. Maximum secondary excitation current at Vk/2
A
61.7
g. Rated accuracy class/accuracy limit factor
61.8
h. Highest equipment voltage
kV
61.9
i. Rated insulation level
kV
61.10
j. Rated short time thermal current/duration
kA/s
Page 40 of 56
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Grid Transformer Schedules
Substation:……………………
Item
Description
61.11
k. Rated dynamic current
61.12
l. Class of insulation
61.13
m. Rated continuous current at 40oC air ambient
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
A
132kV LINE CURRENT TRANSFORMERS
62.0
Purpose
62.1
a. Rated primary/secondary current
A
62.2
b. Rated frequency
Hz
62.3
c. Rated output
VA
62.4
d. Rated knee point voltage (Vk)
VA
62.5
e. Maximum secondary resistance
ohms
62.6
f. Maximum secondary excitation current at Vk/2
A
62.7
g. Rated accuracy class/accuracy limit factor
62.8
h. Highest equipment voltage
kV
62.9
i. Rated insulation level
kV
62.10
j. Rated short time thermal current/duration
kA/s
62.11
k. Rated dynamic current
kA
62.12
l. Class of insulation
62.13
m. Rated continuous current at 40oC air ambient
A
132kV LINE CURRENT TRANSFORMERS
63.0
Purpose
63.1
a. Rated primary/secondary current
A
63.2
b. Rated frequency
Hz
63.3
c. Rated output
VA
63.4
d. Rated knee point voltage (Vk)
VA
63.5
e. Maximum secondary resistance
ohms
63.6
f. Maximum secondary excitation current at Vk/2
A
63.7
g. Rated accuracy class/accuracy limit factor
63.8
h. Highest equipment voltage
kV
63.9
i. Rated insulation level
kV
63.10
j. Rated short time thermal current/duration
kA/s
63.11
k. Rated dynamic current
kA
63.12
l. Class of insulation
63.13
m. Rated continuous current at 40oC air ambient
Page 41 of 56
A
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kA
Substation:……………………
Item
Description
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
132kV NEUTRAL CURRENT TRANSFORMERS
64.0
Purpose
64.1
a. Rated primary/secondary current
A
64.2
b. Rated frequency
Hz
64.3
c. Rated output
VA
64.4
d. Rated knee point voltage (Vk)
VA
64.5
e. Maximum secondary resistance
ohms
64.6
f. Maximum secondary excitation current at Vk/2
A
64.7
g. Rated accuracy class/accuracy limit factor
64.8
h. Highest equipment voltage
kV
64.9
i. Rated insulation level
kV
64.10
j. Rated short time thermal current/duration
kA/s
64.11
k. Rated dynamic current
kA
64.12
l. Class of insulation
64.13
m. Rated continuous current at 40oC air ambient
A
SECONDARY WINDING LINE CURRENT TRANSFORMERS
65.0
Purpose
65.1
a. Rated primary/secondary current
A
65.2
b. Rated frequency
Hz
65.3
c. Rated output
VA
65.4
d. Rated knee point voltage (Vk)
VA
65.5
e. Maximum secondary resistance
ohms
65.6
f. Maximum secondary excitation current at Vk/2
A
65.7
g. Rated accuracy class/accuracy limit factor
65.8
h. Highest equipment voltage
kV
65.9
i. Rated insulation level
kV
65.10
j. Rated short time thermal current/duration
kA/s
65.11
k. Rated dynamic current
kA
65.12
l. Class of insulation
65.13
m. Rated continuous current at 40oC air ambient
Page 42 of 56
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Grid Transformer Schedules
Substation:……………………
Item
Description
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
SECONDARY WINDING LINE CURRENT TRANSFORMERS
66.0
Purpose
66.1
a. Rated primary/secondary current
A
66.2
b. Rated frequency
Hz
66.3
c. Rated output
VA
66.4
d. Rated knee point voltage (Vk)
VA
66.5
e. Maximum secondary resistance
ohms
66.6
f. Maximum secondary excitation current at Vk/2
A
66.7
g. Rated accuracy class/accuracy limit factor
66.8
h. Highest equipment voltage
kV
66.9
i. Rated insulation level
kV
66.10
j. Rated short time thermal current/duration
kA/s
66.11
k. Rated dynamic current
kA
66.12
l. Class of insulation
66.13
m. Rated continuous current at 40oC air ambient
A
SECONDARY WINDING LINE CURRENT TRANSFORMERS
67.0
Purpose
67.1
a. Rated primary/secondary current
A
67.2
b. Rated frequency
Hz
67.3
c. Rated output
VA
67.4
d. Rated knee point voltage (Vk)
VA
67.5
e. Maximum secondary resistance
ohms
67.6
f. Maximum secondary excitation current at Vk/2
A
67.7
g. Rated accuracy class/accuracy limit factor
67.8
h. Highest equipment voltage
kV
67.9
i. Rated insulation level
kV
67.10
j. Rated short time thermal current/duration
kA/s
67.11
k. Rated dynamic current
kA
67.12
l. Class of insulation
67.13
m. Rated continuous current at 40oC air ambient
Page 43 of 56
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Grid Transformer Schedules
Substation:……………………
Item
Description
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Value
Unit
SECONDARY WINDING NEUTRAL CURRENT TRANSFORMERS
68.0
Purpose
68.1
a. Rated primary/secondary current
A
68.2
b. Rated frequency
Hz
68.3
c. Rated output
VA
68.4
d. Rated knee point voltage (Vk)
VA
68.5
e. Maximum secondary resistance
ohms
68.6
f. Maximum secondary excitation current at Vk/2
A
68.7
g. Rated accuracy class/accuracy limit factor
68.8
h. Highest equipment voltage
kV
68.9
i. Rated insulation level
kV
68.10
j. Rated short time thermal current/duration
kA/s
68.11
k. Rated dynamic current
kA
68.12
l. Class of insulation
68.13
m. Rated continuous current at 40oC air ambient
69.0
MATERIAL:
70.0
(i) Castings for current carrying parts
71.0
(ii) Other purposes
72.0
Gaskets for oil-tight joints
73.0
Tubes for water cooled oil coolers
74.0
Tube plates for water cooled oil coolers
Page 44 of 56
A
THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Grid Transformer Schedules
Grid Transformer Schedules
Substation:……………………
SCHEDULE E - Drawings, Data, Assembly, Operating and Maintenance
Instructions, Models and Samples
Drawings
Scale
Drawings shall be to scale and fully detailed with dimensions in metric units.
General arrangement drawings
shall be to a scale not less than 1:50
Detail drawings
not less than 1:20
In exceptional circumstances, where the use of
a scale of 1:20 is not practicable, a scale of 1:33
may be adopted
Drawing size
A0 or A1 size
Some small detail drawings may be A4
Shall not exceed
1188 x 841mm (A0)
Type of drawing to be supplied for comment
The Contractor shall submit any drawing, in hard copy, in triplicate, for comment at all stages of
revision, until the Contractor and the Purchaser agree that the drawing is in its final form.
Drawings, other than those requiring comment, agreed between the Contractor and the
Purchaser as being appropriate to the Contract, shall also be supplied in hard copy, in triplicate.
The Tenderer/Contractor may, by agreement with the purchaser, provide preliminary and/or
interim drawings on disk, in one of the formats specified below, in place of paper prints.
Size of drawing
All drawings shall be supplied in the format described above for pre-commissioning testing.
Final drawings shall also be supplied as A0 or A1 size.
Any other drawing size proposed shall be agreed at the tender stage
Identification of drawings
The Contractor shall provide on each drawing a box inscribed ‘UK Power Networks No.’ into
which shall be entered an eight digit reference number which will be allocated by the Purchaser
when final agreement is reached upon the drawing content.
Page 45 of 56
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5
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
When applying for design type agreement, the Contractor or sub-Contractor shall submit for
comment. Drawings shall show clearly in full detail the equipment for which agreement is
sought. Any change made following agreement may invalidate the agreement previously given.
For final records the Contractor shall supply:
Contract Drawing list
with the number, title and revision of each
drawing
CD-ROM(s)
containing each drawing as a file suitable for
use with Bentley Microstation Version 8 CAD
software. Preferably in Microstation drawing
file (.dgn)
OR
Alternatively in drawing interchange file (.dxf)
OR AutoCAD (.dwg) format.
The Contract Drawing list shall be submitted by the Contractor for approval by the Purchaser,
who will indicate thereon the Company’s requirements for final records, one month before the
commencement of the maintenance period, or such earlier date as may be required by the
Purchaser.
Cable identification
1
Identification of cables
cables and wires shall be identified at both ends with a
clear identification system.
2
Numbering system
shall be that shown on the UK Power Networks drawings.
a) The UK Power Networks numbering system shall be used throughout, unless otherwise
agreed with the purchaser at the tender stage.
b) All wiring leading from the interface with UK Power Networks systems to manufacturers’
internal components must be ferruled in such a manner that all wiring is traceable.
c) Double ferruling is not desirable but may be accepted in certain circumstances – this shall be
subject to agreement at the tender stage.
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Design agreement
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
The following drawings are enclosed with the Standard and Schedules:
Drawing number
Drawing title
A1
Impedance envelope for main transformer
A2
Schematic of tap-changer control
A3
General arrangement of standby voltage control panel
A4
Typical arrangement of WTI circuit
The following documents, which shall be sufficient to enable space and civil requirements for the
transformer and associated equipment to be accurately determined, shall be submitted by the
Tenderer with his Tender:
Item
Drawing number
Drawing Title
B1
Preliminary outline giving side and end elevations and plan of the
tanks including tap changer, auxiliary transformer, neutral earthing
reactor, terminals, cable boxes and cooling equipment
B2
Preliminary foundation details
B3
Preliminary rating and diagram plates for the main transformers
B4
Relevant manufacturer’s safety data sheets
B5
Copy of the Tenderer’s environmental policy
The following drawings shall be submitted by the Contractor for approval by the date shown in
Schedule B Item1 or at other times as may be agreed with the Purchaser.
Prior to the date shown in Schedule B Item 1:
Item
Drawing number
Drawing Title
C1
Definite arrangement of the complete main transformer and
coolers, auxiliary transformers and neutral earthing reactors
C2
Definite foundation plan
C3
Definite arrangement of cable boxes and disconnection chambers
C4
Definite arrangement of the tap change control and cooler control
marshalling boxes or kiosks and standby voltage control cubicles
Page 47 of 56
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Item
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Prior to the commencement of manufacture:
Drawing Title
D1
Name, rating and diagram plates and diagrams of connections for
the main transformers, auxiliary transformers and neutral earthing
reactors showing the relative position of leads taken out of the tank
D2
Valve function plate
D3
Circuit diagrams of tap-change control, cooler control, indications,
alarms trips, heaters and socket outlets
D4
Wiring diagram of tap changer, current transformers and other
fittings
D5
Wiring diagrams of tap change control and cooler control
marshalling kiosks and standby voltage control cubicles
D6
Diagram and schedule of auxiliary multicore cables, including those
to be installed by the Purchaser
D7
Drawing showing any special features likely to need attention
during testing or maintenance
EQUIPMENT DATA
An electronic file, in Microsoft Excel format, shall be provided showing all data relevant to the
equipment supplied. This data is for direct input into the UK Power Networks MIMS database –
a sample format will be supplied by UK Power Networks.
ASSEMBLY, OPERATING AND MAINTENANCE INSTRUCTIONS
Before the Completion Date specified in Schedule B, Item 5, the Contractor shall submit, in
English, Assembly, Operating and Maintenance Instructions and Diagrams for approval by the
Purchaser and after approval, but not later than one month before the commencement of the
maintenance period, shall supply in a durable form the number of copies specified in Schedule D.
MODELS AND SAMPLES
The Contractor shall submit models and samples of materials as requested from time to time by
the Purchaser.
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Drawing number
Grid Transformer Schedules
Substation:……………………
6
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE F - Tests
Tests shall be carried out in accordance with BS EN 60076. Special impulse tests are required on
all transformers, including chopped wave at 110%. Tests shall be carried out in the order agreed
in the test programme.
Routine tests to be conducted on all transformers.
The temperature rise tests on the transformer and cooling shall be undertaken in the physical
configuration corresponding to the site layout.
Auxiliary components (tap changers, pressure relief devices, pumps, etc.) can be given general
type approval.
Routine Test certificates for each auxiliary component shall be provided for each component
which will include magnetisation test result sheets for the CTs.
Where auxiliary components have not been approved by UK Power Networks, evidence of
satisfactory type testing and/or previous service experience shall be required and submitted with
the tender.
The following tests shall be carried out in the factory and shall be regarded as a minimum
requirement.
Item
Description
UK Power Networks
Requirement
1
Impulse
Type test
2
Chopped wave impulse 110%
Type test
3
Gas in oil analysis before and after tests
All transformers
4
Temperature rise at rated power (forced cooling)
Type Test
5
Temperature rise at CER rated power
Type Test
6
Gas in oil analysis before and after tests
Type Test
7
Particle count of oil at end of tests
All transformers
8
Gas in oil analysis after tests
All transformers
9
Physical properties of oil at end of all tests
All transformers
10
Noise level test with frequency spectrum up to at least 1kHz
Type Test
11
Harmonic current
Type Test
12
Partial discharge
All transformers
13
Zero phase impedance
All transformers
14
Dielectric loss angle
Type Test
15
Routine tests as defined in IEC 60076
All transformers
16
Auxiliary equipment tests including bushings and tap changers
All units
17
Current transformers and connections.
All CTs
Page 49 of 56
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Factory tests
Grid Transformer Schedules
Substation:……………………
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
All appropriate checks and tests shall be performed during commissioning at site. A full and
comprehensive programme of testing shall be part of the Contract.
The proposed programme of testing shall be presented in tabular form for the approval of the
Purchaser, and will subsequently form the basis of a commissioning schedule. The anticipated
duration of the site testing shall also be stated.
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SITE COMMISSIONING TESTS
Grid Transformer Schedules
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Substation:……………………
7
SCHEDULE G - Items of Equipment with Prices
To complete each equipment detailed below there shall be provided the necessary oil, cabling,
cable boxes, terminal boards, wiring, fuses, foundation bolts, labels and other sundries whether
specified in detail or not.
Item
Description
Price of each Item
supplied, delivered,
erected and tested
(£ GBP)
1.0
Main Transformer complete with:
1.1
i) Tank mounted or separate oil/air coolers
1.2
ii) Tap-changer control marshalling box
1.3
iii) Cooler control marshalling box
1.4
iv) Standby voltage control cubicle
1.5
v) Routine tests in accordance with Schedule F
2.0
Loss Evaluation
2.1
i) No-load loss - No-load loss on principle tap x cost factor
2.2
ii) Load loss - Load loss (kWTap min + kWTap 7 + kWTap 13 + kWTap max
)/4 x cost factor
3.0
Anti-vibration pads for transformer main tank
4.0
Sum for transport of main indivisible load to site and installed
onto prepared foundation
5.0
Special lifting device for tap-changer maintenance (if required)
6.0
Miscellaneous Equipment
7.0
Special Tools and Equipment (if any):
(To be listed and priced individually in Schedule M)
TOTAL
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8
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE H - Summary of Price and Quantities for Definite Work
Item
No. in
Sch. G
Description
1.0
Main transformer complete as Item 1 in Schedule G
3.0
Anti-vibration pads
4.0
Number
Required
Total Price
(£GBP)
Sum for transport of main indivisible load and
installation onto prepared foundation
5.0
Special lifting device for tap-changer maintenance (if required)
6.0
Miscellaneous Equipment
7.0
Special tools and equipment
TOTAL
WARRANTY OFFERED (refer to Clause 26.1 of ES-04-8000)
a.
Defects Liability period
Years
b.
Incidental costs per unit
£ GBP Max
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Grid Transformer Schedules
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Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE J - Prices for Work at the Option of the Purchaser
Item
Description
Price of Each Item,
Supplied, Delivered
and off-loaded
(£GBP)
1.0
Additional tests consisting of:
a) Temperature rise tests in accordance with Schedule F on a tap
position and loading to be agreed with the Purchaser.
The test to also include DGA oil from top and bottom of main tank and
from selector compartment per run
b) Type impulse tests in accordance with Schedule F, less cost of routine
test already included in Item 1 of Schedule G.
c) Additional noise level test for complete transformer with all cooling
plant in operation
d) Frequency response analysis tests for main transformer immediately
prior to transportation and immediately after off-loading at site
2.0
Spare oil pump
3.0
Copy of a set of photographs taken:
a) of the core/winding assembly at cleat bar
inspection stage, both HV and LV sides
b) of the completed unit including assembled
transformer/cooler bank at type test stage, all
sides and top
4.0
Recommended spares:
To be listed and priced individually in Schedule M.
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SCHEDULE K - Access and Site Facilities
The contractor shall ensure that all construction traffic and employees vehicles for which he is
responsible, including his Sub-Contractors, use the following site access facilities. These facilities
will be in constant use by all Contractors working on site.
Road Entry
Road Exit
Rail Access
Off-Loading
Where equipment is to be erected by the Contractor, the Works shall include the off-loading of
the equipment from the Contractor's vehicle and installation into its final position by the
Contractor. The point of off-loading and methods of handling within the substation shall be
agreed between the Purchaser and the Contractor.
Any equipment that is not to be erected by the Contractor shall be off-loaded from the
Contractor's vehicle onto a firm surface as close as practicable to the point of installation. The
Contractor's vehicle shall incorporate suitable lifting apparatus, or separate means of off-loading
shall be provided by the Contractor. The point of off-loading shall be agreed between the
Purchaser and the Contractor.
Contractor's Area (Contracts with Erection)
The Contractor will, if he so request and if it is practicable, be allocated an area of land or space
within an existing building for the purpose of temporary buildings, materials storage and the like.
Materials, temporary structures or plant shall not be placed elsewhere unless, in the opinion of
the Purchaser, these are required for the immediate construction of the Works.
Accommodation for Employees (Contracts with Erection)
The Contractor shall prohibit the committing of nuisance by his employees within the site or
upon the land of the Company or others. Any employee found violating this provision shall be
immediately discharged and not employed again on this contract.
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10
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
Grid Transformer Schedules
Substation:……………………
11
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE L - Proposed Exceptions or Additions to the Standard
The Tenderer shall state below the detail and extent to which his offer(s) departs from the
specified requirements for every clause / sub-clause.
The Tenderers offer will be deemed to fully conform to the requirements of the Standard (EDS
04-8000) and Schedules (EDS 04-8000A) except, where the Tenderer specifically states below.
Clause /
SubClause
Conformance Description
(Partial Conformance, NonConformance)
Supplier Remarks
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(To be completed by the Tenderer)
Grid Transformer Schedules
Substation:……………………
12
Document Number:
EDS 04-8000A
Version : 2.0
Design doc No :
SCHEDULE M - List of Special Tools and Equipment to be Used
Item
Description
Quantity
1.0
LIST OF SPECIAL TOOLS AND EQUIPMENT TO BE USED:
2.0
LIST OF RECOMMENDED SPARES
3.0
LIST OF REQUIRED TRAINING
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