Download True Three Phase TF Turn Ratio Tester 400kV

HARYANA VIDYUT PRASARAN NIGAM LIMITED
TECHNICAL SPECIFICATION NO.92-4(a)(400kV)/DGM-1440
FOR
TRUE THREE PHASE TRANSFORMER TURN RATIO
TESTER
(Suitable for use upto 400kV S/Stns.)
(M&P WING)
CHIEF ENGINEER, MM,
HVPNL, PANCHKULA
DECEMBER-2015
GENERAL REQUIREMENTS
1.0
SCOPE:
1.1
This specification covers the design, engineering, manufacture, inspection & testing at
manufacturer’s work before dispatch, packing, forwarding and delivery at the discretion of
Purchaser of various testing equipment listed in the schedule of requirements at Annexure-A.
1.2
Unless specifically excluded from the offer, all fittings and accessories, not specifically
stated in this specification but which are necessary for satisfactory operation of the scheme or
to complete the work in a good workman like manner shall be deemed to have been included
in the scope of supply of the Bidder.
1.3
The Demonstration of the equipment in live EHV switchyard upto 400kV S/Stn. and
satisfactory performance as per GTP requirement i.e. the consistency and repeatability of test
results shall be the criteria of acceptability of successful bidder thereafter part-II (price bid) of
the tender shall be opened.
2.0
SERVICE CONDITIONS:
Equipment to be supplied against this specification shall be suitable for satisfactory
continuous operation under the following tropical conditions:-
i.
ii.
iii.
iv.
v.
vi.
vii.
viii.
ix.
x.
Location
IN THE STATE OF HARYANA
Max. ambient air temp (0C)
50
Min. ambient air temp (0C)
-2.5
Max. relative humidity (%)
100
Min. relative humidity (%)
26
Average annual rainfall (mm).
900
Max. Wind pressure (kg/sq.m)
195
Max.Altitude above mean sea level (meters)
1000
Isoceraunic level (days/year)
50
Seismic level (horizontal acceleration)
0.3g
Note: Moderately hot and humid tropical climate conducive to rust and fungus growth. The
climatic conditions are also prone to wide variations in ambient conditions.
3.0
MATERIAL AND WORKMANSHIP:
All the materials used in the construction of the equipment shall be of the best quality
obtainable of their respective kinds and whole of the work shall be of the highest class, well
finished and of approved design and make. Castings shall be free from blow-holes, flaws,
cracks or other defects and shall be smooth grained and of true dimensions and forms.
4.0
DEPARTURE FROM THE SPECIFICATIONS:
Should the tenderer wish to depart from provision of this specification either on account
of a manufacturing practice or for any other reasons, he will draw specific attention to the
proposed points of departure on the prescribed performa (enclosed) at Annexure-B in his
tender and submit such full information, drawings & specifications as will enable the merit the
merit of his proposal to be appreciated.
In the event of contractor drawings, specification and table etc. disagreeing with this
specification during the execution of the contract, this specification shall be held binding unless
the departures have been fully recorded as required above.
5.0
SITE DEMONSTRATION:-
The successful bidder(s) will be required to demonstrate the performance of their
offered equipment(s) at four locations in Haryana so as to familiarize the purchaser’s
Engineers/technicians for use of a given testing equipment. These demonstrations will be free
of charge & will be planned soon after the supplies are made so as to make use of the testing
equipments. Apart from the detailed demonstration at site, the supplier shall also have to
arrange necessary training to HVPNL engineers.
6.0
NAME PLATE:
An easily accessible engraved or painted name plate shall be provided on each
equipment. It must include purchase order No., supplier’s reference No. & item number as per
purchase order.
7.0
INSPECTION AT MANUFACTURERS WORKS:
7.1
All equipment shall be subject to routine tests according to the relevant standards and to
such other tests as may be required to ensure that all equipment is satisfactory and in
accordance with this specification. The Purchaser reserves the right to witness all the tests,
unless dispensed with in writing by the purchaser.
7.2
The supplier shall give sufficient advance intimation at least 15 days notice to the
purchaser to enable him to depute his representative for witnessing the tests to prove the test
equipment.
8.0
GENERAL TECHNICAL REQUIREMENT:
(i)
(ii)
Supply Voltage
Frequency
(iii)
The testing set shall be capable of working in hostile condition of electrostatic field
prevailing in charged HV/EHV Substations up to 400 kV of high voltage and of high
interference environment.
:
:
Single Phase AC, 230 Volt +10%
50 Hz + 3%
9.0
DOCUMENTATION:
The supplier shall furnish nicely printed and bound volumes of the instruction manuals in
English language, prior to the dispatch of the equipment. The instruction manual shall
contain step by step instructions for all operational & maintenance requirements for all
the testing equipments. If should also include the GA & detailed schematic drawings
including internal wiring diagram of the various equipments to facilitate its repair at site
incase of any defect.
The number of sets of instruction manuals to be supplied shall be as under: -
i)
Two sets for CE/MM, HVPNL, Panchkula
ii)
Five sets separately bound for each item for SE/M&P-Cum-Carrier Circle, HVPNL, Delhi
& five sets for SE/M&P-Cum-Carrier Circle, HVPNL, Ambala.
B.
TECHNICAL SPECIFICATION:-
I
PORTABLE DIGITAL TRUE THREE PHASE TRANSFORMER TURN RATIO TESTER
(AUTOMATIC)
The portable automatic transformer turn ratio tester for automatic measuring the turn
ratio of power transformer (two winding, three winding and auto transformer, connected
in Star-Star or Delta-Star or any other configuration) shall conform to the following: i)
Range
:
Atleast 1-99
ii)
Ratio Accuracy
:
+/- 0.1% of reading
iii)
Least count (Resolution)
:
0.001
iv)
Protection
:
The instrument shall be protected against
over load, short-circuit, wrong connection and HV/LV
reversal at instrument end.
v)
Power requirement
:
Input power (i) Single Phase AC, 230 Volt ±10%
(ii) Frequency: 50 Hz ± 3%
vi)
Casing
:
Strong shockproof casing with detachable
leads along with leather case and shoulder carrying
strap.
vii)
Accessories
:
Instrument should be complete in all respect with
rubber-insulated test leads of 15 meter length and all
other accessories for normal operation of the TTR
and Software, if applicable.
viii)
Position of use
:
Horizontal
ix)
Duty Cycle
:
Heavy duty rated for continuous use.
x)
Display
:
VGA/LCD simultaneously for three phases with back light
viewable in bright sunlight.
xi)
Polarity
:
The polarity of the winding of transformer
indicated on the LCD/VGA.
Test Voltage
Excitation Current
should be
Upto 80V
1mA to 2000mA or higher
Measurement
Ratio, Phase Deviation, Excitation current.
Display
Should display % error vs name plate value for all taps with
pass/fail limits
Storage
Built in storage of test results in printable report form.
Interfacing PC
The kit shall be provided with necessary ports
(RS-232/USB/Equivalent) to interface the other prophetical
devices such as printers, portable drive, etc.,
Software
The kit should have facility to connect with windows based
computer for exporting the test data. The software should be
suitable for data storage, report printout and down load of data
etc. The original software in CD shall be handed over to HVPNL
during commissioning.
Vector Group
The kit should have automatic vector group detection using
software if applicable
Temp. Range.
0 to 50 C
Measuring Time
Within 30 seconds depending on mode of operation and type of
Transformer.
Transit Case
Moulded case for storing /shipping the instrument and other
accessories.
Safety
It should meet the safety requirement of IEC1010-1, CE and
ASTM D999.7528
Protection of Kit
Kit should have all necessary protections against transient
surges, over voltages, induction, short ckts. Etc.,
GUARANTEED TECHNICAL PARTICULARS OF TRUE THREE PHASE TRANSFORMER
TURN RATIO TESTER
(SUITABLE FOR USE AT SUB STATIONS OF VOLTAGE LEVEL of 400 KV)
SR.
DESCRIPTION AS PER
PARTICULARS
NO.
TECHNICAL
PARAMETERS
1
NAME OF THE MANUFACTURER
2
RANGE
3
RATIO ACCURACY
4
LEAST COUNT
(RESOLUTION)
5
PROTECTION
6
POWER REQUIREMENT
7
CASING
8
ACCESSORIES
9
POSITION OF USE
10
DUTY CYCLE
11
DISPLAY
12
POLARITY
13
TEST VOLTAGE
14
EXCITATION CURRENT
15
MEASUREMENT
16
DISPLAY
17
STORAGE
18
INTERFACING PC
19
SOFTWARE
20
VECTOR GROUP
21
TEMP. RANGE.
22
MEASURING TIME
23
TRANSIT CASE
24
SAFETY
25
PROTECTION OF KIT
26
ANY DEVIATION FROM
TECHNICAL SPECIFICATION,
IF ANY