Download DPSS ECS Replacement - Schedules AB

APPENDIX B: SCHEDULES A & B
SCHEDULE A: PARTICULARS OF EMPLOYERS REQUIREMENTS
SCHEDULE B: GUARANTEES AND TECHNICAL PARTICULARS OF PLANT AND MATERIAL
OFFERED BY THE CONTRACTOR
Important Notes:
i.
Where there is insufficient space provided in Schedule B, particulars must be furnished on a
separate sheet marked with the number of the Schedule A and item referred to.
Where the Contractor does not comply with the Employer’s requirements in the Works Info or
Schedules A&B, these deviations must be clearly stated in the deviation list or Schedule B
where applicable.
Filling in of Schedule B is compulsory for the Contractor. Failure to do so will eliminate
tenderer from the evaluation process.
ii.
iii.
DESCRIPTION
1.
Schedule A
Schedule B
EXTERNAL PLANT CONDITIONS
(Section 1 does not need to be filled in by the Contractor)
1.1
NORMAL SYSTEM CONDITIONS
(Extremes of these parameters can occur simultaneously)
I.
Voltage range
V
95 to 105
II.
Frequency range
%
98 to 102
XXXXXXXXXXXX
XXXXXXXXXXXX
III.
Voltage imbalance – Negative sequence voltage as
a percentage of normal positive sequence voltage
%
2
XXXXXXXXXXXX
IV.
Wave form - maximum amplitude deviation from
sine wave
%
5
XXXXXXXXXXXX
1.2
SUSTAINED ABNORMAL SYSTEM
CONDITIONS
(Up to six hours unless otherwise indicated)
I.
Voltage range
%
90 to 110
XXXXXXXXXXXX
II.
Voltage depressions per unit (for up to ten seconds)
%
75
XXXXXXXXXXXX
III.
Frequency range (continuous)
%
95 to 105
XXXXXXXXXXXX
IV.
Voltage imbalance - Negative sequence voltage as
a percentage of normal positive sequence voltage
%
3
XXXXXXXXXXXX
1.3
220VDC NORMAL SUPPLY CONDITIONS
I.
Voltage range
%
85 to 115
XXXXXXXXXXXX
II.
Maximum r.m.s. ripple voltage
%
2,5
XXXXXXXXXXXX
III.
DC earthing
High resistance,
centre point
XXXXXXXXXXXX
Schedule A
DESCRIPTION
2.
FLOOR REQUIRMENTS
2.1
CABLE OPENINGS
a)
Dimensions of cable
excitation panels
b)
Number of cable openings required
2.2
openings
required
for
mm
FLOOR LOADING
a)
Mass of completed excitation panels
kg
b)
Mass of completed excitation transformer assembly
kg
3.
PANEL DESIGN AND CONSTRUCTION
3.1
GENERAL
a)
3.2
Manufacturer of panels
SIZE OF EXCITATION PANELS
a)
Length
mm
b)
Width
mm
c)
Height (including base frame)
mm
3.3
SIZE OF EXCITATION
CUBICLE/ASSEMBLY
TRANSFORMER
d)
Length
mm
e)
Width
mm
f)
Height (including base frame)
mm
3.4
SPACE
ALLOCATED
EXCITATION PANELS
FOR
PLACING
a)
Length
mm
4700
b)
Width
mm
850
3.5
SPACE ALLOCATED FOR PLACING THE
EXCITATION TRANSFORMER ASSEMBLY
c)
Length
mm
3600
d)
Width
mm
1300
Schedule B
Schedule A
DESCRIPTION
3.6
MINIMUM MATERIAL THICKNESS
a)
Base plates
mm
5
b)
Gland plates
mm
5
c)
Supporting structures
mm
2.5
d)
Cover plates
mm
2.5
e)
Removable covers
mm
2.5
f)
Doors
mm
2.5
g)
Equipment mounting panels (Chassis plate)
mm
2.5
3.7
PANEL ACCESS
a)
Front panel access
Yes, doors
b)
Rear panel access
Yes, doors and bolt
on panels
c)
Excitation panels cable entry
Bottom
d)
Excitation transformer cubicles cable entry
Top
3.8
COMPARTMENT SEPARATION
a)
Separate switching devices compartment
Yes
b)
Separate control electronics compartment
Yes
c)
Excitation transformer phase separation
Yes
d)
Access restriction to live parts when doors are open
Transparent
polycarbon barriers
3.9
PANEL DOORS
a)
Door locking mechanism
Pad-lockable lever
a)
Minimum latching points (Doors >800mm)
4
b)
Minimum hinges
4
c)
Door over-swing protection
Yes
d)
Door reinforcement required
Yes
3.10
CORROSION PROTECTION & FINISHING
a)
External colour
RAL1015 or RAL7035
b)
Surface finish
Epoxy powder
coated, textured
c)
Internal mounting plates/chassis plates colour
White, high gloss
d)
Surface finish
Epoxy powder coated
e)
Framework/support structures
Galvanised or alloy
cold rolled zinc steel
f)
Gland plates
Corrosion resistant &
unpainted
Schedule B
Schedule A
DESCRIPTION
3.11
MINUMUM DEGREE OF ENCLOSURE
PROTECTION (TO IEC 60529)
a)
Excitation cubicles
IP54CH
b)
Excitation transformer cubicles
IP24
4.
EARTHING
4.1
PANEL MAIN PE CONDUCTOR
a)
Connections
Bolted
b)
Earth conductor position
Rear of panel
c)
Earth conductor material
Solid Copper
d)
Min earth conductor size
e)
Earth conductor rated short-time fault withstand
time
4.2
mm²
s
150
3
METAL COMPONENTS/FRAMES
a)
Connections
Lugged,
chained
b)
Material
Stranded copper
c)
Colour coding
Green & Yellow
d)
Min material thickness
4.3
mm²
Non-daisy
2.5
DOORS
a)
Connections
Stud/bolted
connections
b)
Material
Braided copper straps
5.
EXCITATION CONTROL SYSTEM
5.1
GENERAL
a)
Manufacturer
b)
Model number
a)
Type
Digital
b)
Configuration
Fully redundant dual
channel.
(AVR,
ARPR
and
field
current control per
channel)
c)
Test mode
Open
loop,
selectable
user
Schedule B
Schedule A
DESCRIPTION
5.2
COMMUNICATIONS
EMPLOYER’S SCADA
PROTOCOL
TO
a)
Protocol: First option (Most preferred)
IEC 60870-5-104
b)
Protocol: Second option
IEC 61850
c)
Protocol: Third option
OPC
d)
Time synchronisation
NTP/SNTP
e)
Time synchronisation method
External GPS clock
(Provided by
Employer)
5.3
PERFORMANCE INDEX
a)
Transient gain
pu
20
b)
Nominal response
s-1
2
c)
Voltage over shoot (@10% step)
%
 30 of step size
d)
Rise time (From 10%Ugn to 90%Ugn)
e)
Maximum voltage reached after disconnection from
grid at rated field current.
%
 120 of Ugn
f)
Minimum stator voltage at which rated excitation
field current can be maintained
%
50 Ugn
g)
Positive ceiling voltage (α=15o, Ugen=80%)
pu
1.6 Ufn (Gen Mode)
h)
Channel changeover steady state deviation
%
 0.5 Ugn
i)
Voltage control accuracy (AVR Mode)
%
Within 0.5 of Ugn
j)
Open loop regulator accuracy (FCR mode)
%
Within 1 of Ifn
5.4
ms
< 300
VOLTAGE CONTROL LIMITS
a)
Upper limit
%
Ugn +10
b)
Lower limit
%
Ugn – 10
5.5
FIELD CURRENT CONTROL LIMITS
a)
Upper limit
%
110 of Ifn
b)
Lower limit
%
0 of Ifn
5.6
STEP FUNCTION
a)
Amplitude (adjustable)
%
0.05 to 30 of Ugn or
Ifn
b)
Resolution
%
0.1 of Ugn or Ifn
Schedule B
Schedule A
DESCRIPTION
5.7
FREQUENCY SWEEP FUNCTION
a)
Amplitude (adjustable)
%
0.05 to 30 Ugn
b)
Resolution
%
0.1 of Ugn
c)
Frequency range
Hz
0.1 to 4
d)
Frequency resolution
Hz
0.01
5.8
OVER EXCITATION LIMITER
Fixed time or I2t curve
- User selectable
a)
Operating mode
b)
Max ceiling value adjustable
pu
0.85 to 2.2 of Ifn
c)
Thermal value adjustable
pu
0.85 to 1.1 of Ifn
pu
I2t curve
5.9
STATOR CURRENT LIMITER
a)
Operating mode
b)
Operating in capacitive or inductive region
5.10
Selectable (either or
both)
FLUX LIMITER
a)
Operating value
pu
b)
Time to operate
s
c)
Operating mode
5.11
1 to 1.25
0 to 30
Fixed time or I2t curve
- User selectable
UNDER EXCITATION LIMITER
Reactive power offset range
b)
Limiting incline
deg
20 to 90
c)
Resolution
deg
1
d)
External reactance
pu
0 to 1 in steps of 0.01
e)
Resolution of Q setting when limiter is Q(P)
pu
0.01
f)
If the UEL is a Q(P) limiter then at least 4 points be
available for setting the characteristic in both import
and export quadrants and must operate in both gen
and pump modes.
pu
|P|: 0 to 1
Q: -1 to 0
pu
0 to 0.5 of Ifn
5.12
pu
0 to –1 Sn
a)
MINIMUM FIELD CURRENT LIMITER
a)
Settable range
b)
Time to operate
Instantaneous
Schedule B
Schedule A
DESCRIPTION
5.13
SOFT START FUNCTION
a)
Time to reach pre-set
s
0 to 60
b)
Resolution
s
0.1
5.14
EXCITER FIELD WINDING OVER VOLTAGE
PROTECTION
a)
Positive bar
Yes
b)
Negative bar
Yes
5.15
DC SHORT CIRCUIT PROTECTION
a)
Range
pu
0 to 5 Ifn
b)
Resolution
pu
0.01
5.16
POWER SYSTEM STABILISER (PSS)
a)
Damping ratio local mode
b)
Frequency operating range
Hz
0.2 to 4
c)
Active power switch-on level
pu
0 to 1.0 Sn
d)
Active power switch-on time delay
s
0 to 10
e)
Timer resolution
s
0.1
f)
Active power switch-off level
g)
Active power switch-off time delay
s
h)
Stator voltage switch off (low level)
%
100 to 85 of Ugn
i)
Stator voltage switch off (upper level)
%
100 to 110 of Ugn
j)
PSS switch-off time delay due to PSS output out of
bounds
s
0 to 10
k)
PSS switch-on time delay due to PSS output
recovery
s
0 to 10
l)
PSS output Low limit
m) PSS output Upper limit
6.
>0.1
pu
0 to 1.0 Sn
0 to 10
%
0 to 10 of Ugn
%
0 to 10 of Ugn
CONVERTOR OPTIONS
a)
Model number
b)
Type
6 pulse, full wave,
thyristor controlled
c)
Redundancy
1+1 or N-1
d)
Continuous rating of one converter at ambient of
35oC
A
Schedule B
Schedule A
DESCRIPTION
7.
DC FIELD BREAKER
a)
Number of main poles
b)
Coil nominal operating voltage (DC)
V
220
c)
Coil operating voltage min range (trip and close)
%
80 of Un
d)
Normally open auxiliary contacts for use other than
by the ECS
Normally closed auxiliary contacts for use other
than by the ECS
4 potential free
f)
Number of mechanical operations
≥10000
g)
Operating counter
Mechanical 5
non resettable
h)
Trip coils
2
i)
Time to block breaker operation switch from
opening to closing
e)
8.
1 or 2
4 potential free
s
5-30
digit
FIELD FLASHING
8.1
AC FIELD FLASHING SUPPLY
a)
Nominal voltage
V
400
b)
Voltage range
%
±5
c)
Supply VA requirement
8.2
VA
DC FIELD FLASHING SUPPLY
a)
Nominal voltage
b)
Supply VA requirement
9.
V
220
VA
FIELD SUPPRESSION
a)
Overlapping time
b)
Nominal voltage
10.
ms
V
2-15
400
RECORDING DEVICES
10.1
EVENT RECORDER
a)
Minimum number of stored events
255
b)
Sampling rate
minimum cycle time
of processing system
(3ms typically)
c)
Type of event display
All internal signals
causing
a
trip,
channel change over
or any alarm state
Schedule B
Schedule A
DESCRIPTION
10.2
TRANSIENT RECORDER
a)
Minimum digital quantities
16
b)
Contact voltage
24V to 250 VDC or
potential free on at
least 8 inputs for
external signals
c)
Minimum analogue quantities
6
d)
e)
Sampling rate for non-instantaneous signals (i.e.
voltage converted to DC value)
Minimum recording time window
f)
Triggering criteria
g)
Pre-trigger
h)
Digital trigger
Positive
and/or
negative edges
i)
Analog trigger
Exceeding
limit
values and gradients
j)
Export file types
Comtrade
k)
Minimum number of records stored in memory
10
10.3
TRANSFORMERS
10.4
EXCITATION TRANSFORMERS
ms
s
s
Type
b)
HV side nominal voltage
kV
c)
LV side nominal voltage
V
d)
Size (electrical)
e)
Impedance
f)
Vector group
g)
Maximum winding operating temperature at rated
power @ ambient of 40oC
Maximum core operating temperature at rated
power @ ambient of 40oC
Maximum cubicle surface temperature at rated
power @ ambient of 40oC
Excitation transformer sizing calculations required
i)
j)
10.5
10
Binary or analogue
a)
h)
5
2
Three individual dry
type single phase
units
11
VA
%
Ydx
oC
oC
oC
Yes
CURRENT TRANSFORMERS FOR
EXCITATION OVER CURRENT
PROTECTION
a)
CT ratio
b)
VA rating
c)
CT class
VA
5P10
Schedule B
Schedule A
DESCRIPTION
11.
PROTECTION IED’S
a)
Manufacturer
b)
Type
Digital
c)
Connection
3 phase
d)
Nominal current (In)
e)
Current setting range
0.05 to 2.5 In
f)
Time multiplier
0.05 to 1.00
g)
Error of settings
h)
Overload capability
100 In for one second
i)
Curve/characteristic
IEC very inverse &
extremely
inverse
selectable
j)
High set
1.0 to 30.0 In
k)
High set time
l)
Number of IDMT curves simultaneously active
A
%
s
Sustained fault timer range
o)
Setting resolution
12.
AUXILLIARY ELECTRICAL &
MISCELLANEOUS COMPONENTS
12.1
INTERNAL POWER SUPPLY UNITS
s
ms
Manufacturer
b)
Input voltage range to maintain nominal output
voltage
%
c)
Maintain rated output voltage in case of supply loss
ms
d)
Overload indication and protection
Manufacturer
b)
Rated breaking current
c)
Rated voltage VAC/VDC
d)
Curve selections
a)
0.00 to 10.00
10
85 to 120
500
Yes
MCB’S FOR CONTROL CIRCUITS
a)
12.3
0.04 to 5.00
Yes
a)
12.2
< 7.5
1 or 2
m) Logic functionality to add sustained fault timer
n)
1
FUSES POWER ELECTRONICS
Manufacturer
kA
5
Schedule B
Schedule A
DESCRIPTION
b)
12.4
Type
Manufacturer
b)
Type
c)
Rated voltage
d)
Rated breaking current
BS88 or Cylindrical
V
kA
SIGNAL LAMPS OR LIQUID DISPLAY
a)
Manufacturer
b)
Type
c)
Supply voltage
12.6
industrial HRC for
power electronics
CONTROL CIRCUIT FUSES
a)
12.5
Schedule B
LED
V
LABELS
a)
Language
English
b)
Colour (General Labels)
White
background,
black lettering
c)
Colour (Warning Labels)
White
background,
red lettering
d)
Letter print: Internal labels
Laser
printed
engraved
e)
Letter print: External labels
Engraved
12.7
or
FERRULE NUMBERING
a)
Manufacturer
b)
Material
c)
Size
d)
Type
Sleeve type
e)
Font
Arial, bold
f)
Colour
White
background,
black lettering
12.8
Grafoplast
Equivalent
mm
or
15x4
CABLE NUMBERING
a)
Manufacturer
Grafoplast
Equivalent
b)
Material
PVC, UV resistant
c)
Size
d)
Type
Sleeve type
e)
Font
Arial, bold
mm
70x10
or
Schedule A
DESCRIPTION
f)
Colour
Yellow background,
black lettering
g)
Placement
Above gland plate
and before panel
entry (top/bottom)
12.9
TRANSDUCERS
a)
Manufacturer
b)
Type
c)
Accuracy
d)
Power supply
12.10
mA
4-20
Class 1
Vdc
24/220
CT TEST BLOCKS
a)
Manufacturer
IST / GE
b)
Type
PK2 (4 or 6way)
c)
Mounting
Panel/surface
d)
Supply test handles
Yes
12.11
VT TEST BLOCKS
a)
Manufacturer
IST / GE
b)
Type
PK2 (4 way)
c)
Mounting
Panel/surface
d)
Supply test handles
Yes
12.12
INDICATING INSTRUMENTS
a)
Manufacturer
b)
Type
mA
4-20
c)
Size
mm
72x72
d)
Full scale deflection angle
deg
240
e)
Accuracy
Class 1
f)
Mounting
Flush
g)
Generator stator voltage range
kV
0 to 15
h)
Generator stator current range
kA
0 to 20
i)
Generator active power range
MW
-300 to 300
j)
Generator reactive power range
MVAr
-300 to 300
k)
Generator field current range
A
0 to 2200
l)
Generator field voltage range
V
0 to 500
Schedule B
Schedule A
DESCRIPTION
12.13
EXCITATION TRANSFORMER
SAFETY SWITCHES
CUBICLE
a)
Type
b)
Roller lever: Minimum pre travel
deg
10
c)
Roller lever: Minimum over travel
deg
20
d)
Roller lever: Minimum total travel
deg
50
e)
Plunger: Minimum pre travel
mm
2
f)
Plunger: Minimum total travel
mm
10
g)
Material
Die cast (Zinc
Aluminium)
h)
IP rating
IP65
i)
Contact rating at 220VDC (IEC 60947-5-1), Trip coil
with no economising resistor
DC-13
j)
Contact rating at 220VDC (IEC 60947-5-1), Trip coil
with economising resistor
DC-14
k)
Number of contacts
Two N/C
l)
Contact action
Snap
13.
CABLING
13.1
PROCESS CONTROL AND
INSTRUMENTATION CABLING (<1 AMP
SIGNALS)
Roller
plunger
lever
a)
Manufacturer
b)
Code
UVG_ _ _CM
c)
Type
Low halogen
d)
Core identification
Colour coded
stripes per core
e)
Minimum voltage rating
13.2
Schedule B
V
300/500
LV POWER & CONTROL CABLING
a)
Manufacturer
b)
Code
BVV_ _ _ CM
c)
Type
Low halogen
d)
Core identification (2-4 cores)
Colour coded
e)
Core identification (>4 cores)
Individual core
numbering
f)
Minimum voltage rating
V
600/1000
or
or
with
Schedule A
DESCRIPTION
13.3
ROTOR CABLING
a)
Manufacturer
b)
Code
c)
Type
d)
Minimum voltage rating
13.4
Low halogen
V
600/1000
EXCITATION TRANSFORMER HV CABLING
a)
Manufacturer
b)
Code
c)
Type
Low halogen
d)
Core identification
Heatshrink to colour
code
e)
Minimum voltage rating
13.5
kV
22
EXCITATION TRANSFORMER LV CABLING
a)
Manufacturer
b)
Code
c)
Type
Low halogen
d)
Core identification
Heatshrink to colour
code
e)
Minimum voltage rating
14.
V
600/1000
HV INSULATION
a)
Tests on power plant and material
IEC 60036-1
b)
Tests on electronic plant and material
IEC 60255
Class II
15.
SUB-CONTRACTORS
a)
Subcontractor engaged in delivery of assembly
b)
Subcontractor engaged in erection of assembly
c)
Subcontractor engaged
assembly
Other subcontractors
d)
in
commissioning
of
Schedule B
Schedule A
DESCRIPTION
16.
MANUALS & SOFTWARE
16.1
OPERATING
MANUALS
a)
AND
MAINTENANCE
5
b)
Number of copies of all instruction/O&M manuals
required
Electronic submission required
c)
Format
At least searchable
pdf
16.2
a)
b)
Yes – CD/DVD
SPECIAL TOOLS
Number of each special tool set required for
maintenance
Software packages Windows compatibility
17.
TRAINING
17.1
NUMBER OF STAFF TO BE TRAINED
2
Windows 7 upwards
a)
Engineering/Commissioning staff
8
b)
Maintenance personnel
12
c)
Operating personnel
15
17.2
LOCATION
a)
Engineering /Commissioning staff
b)
Maintenance personnel
Drakensberg
Station
Power
c)
Operating personnel
Drakensberg
Station
Power
Schedule B