GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
GUJARAT ENERGY TRANSMISSION
CORPORATION LTD.
SARADAR PATEL VIDYUT BHAVAN,
RACE COURSE, BARODA – 390 007.
TECHNICAL SPECIFICATIONS
FOR
0.5 mH, 1250 A LINE TRAP
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
Sign & Seal of Bidder
Page 1 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
(A)
SPECIAL INSTRUCTIONS TO BIDDER
Please read following instructions carefully before submitting your bid.
1.
All the drawings, i.e. elevation, side view, plan, cross sectional view etc.,
in AutoCAD format and manuals in PDF format, for offered item shall be
submitted. Also the hard copies as per specification shall be submitted.
2.
The bidder shall submit Quality Assurance Plan for manufacturing process
and Field Quality Plan with the technical bid.
3.
The bidder shall have to submit all the required type test reports for the
offered item. In case of non-submission of the type test reports with the
offer, the bid shall be liable to be rejected.
4.
The bidder must fill up all the point of GTP for offered item/s. Instead of
indicating “refer drawing, or as per IS/IEC”, the exact value/s must be
filled in.
5.
All the points other than GTP, which are asked to confirm in technical
specifications must be submitted separately with the bid.
6.
The bidder is required to impart training in view of manufacture,
assembly, erection, operation and maintenance for offered item, at his
works, to the person/s identified by GETCO, in the event of an order, free
of cost. The cost of logistics will be bear by GETCO.
7.
Please note that the evaluation will be carried out on the strength of
content of bid only. No further correspondence will be made.
8.
The bidder shall bring out all the technical deviation/s only at the
specified annexure.
9.
The bidder should indicate manufacturing capacity by submitting latest
updated certificate of a Chartered Engineer (CE).
Sign & Seal of Bidder
Page 2 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
(B)
QUALIFYING REQUIREMENT DATA
(For Supply)
Bidder to satisfy all the following requirements.
Sr.
No
1)
The bidder shall be Original Equipment Manufacturer (OEM). The
offered equipment have to be designed, manufactured and tested as
per relevant IS/IEC with latest amendments.
2)
The minimum requirement of manufacturing capacity of offered
type, size and rating of equipment shall be 7 times tender / bid
quantity. The bidder should indicate manufacturing capacity by
submitting latest updated certificate of a Chartered Engineer (CE).
3)
Equipment proposed shall be of similar or higher rating and
in
service for a minimum period of THREE (3) years and satisfactory
performance certificate in respect of this is to be available and
submitted.
4)
The bidder should clearly indicate the quantity and Single Value
Contract executed during last FIVE (5) years, for the offered
equipment. Bidder should have executed one single contract during
last five years for the quantity equivalent to tender / bid.
The details are to be submitted in following format,
ITEMS
SUPPLIED
TO
5)
ORDER
REFERENCE No.
& DATE
ITEMS
QUANTITY
ORDER
FULLY
EXECUTED
YES/NO
STATUS, IF
ORDER
UNDER
EXECUTION
REMARK
Equipment offered shall have Type Test Certificates from
accredited laboratory (accredited based on ISO/IEC Guide 25 /
17025 or EN 45001 by the National accredition body of the country
where laboratory is located), as per IEC / IS / technical
specifications not older than FIVE (5) years and shall have validity
till expiry of validity of technical bid.
Sign & Seal of Bidder
Page 3 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
1.0
1.1
SCOPE:
This specification provides for design, engineering, manufacture, stage
testing, inspection and testing before dispatch, packing and delivery at
destination of Line Trap along with all accessories specified herein. The
line trap to be inserted into high voltage A.C transmission lines to prevent
undue loss of carrier signal power, typical in the range 30KHz to 500KHz,
under all power system conditions and to minimize interference from
carrier signaling systems on adjacent transmission lines.
1.2
It is not the intent to specify completely herein all details of the design
and construction of equipments. However, the equipment shall conform in
all respects to high standards of engineering, design and workmanship and
shall be capable of performing in continuous commercial operation up to
the Bidder’s guarantee acceptable to the Purchased, who will interpret in a
manner the meanings of drawings and specification and shall have the
power to reject any work or material which in his judgment is not in
accordance therewith. The equipment offered shall be complete with all
components necessary for it effective and trouble free operation. Such
components shall be deemed to be within the scope of Bidder’s supply,
irrespective of whether these are specifically brought out in this
specification and/or the commercial order or not.
2.0
2.1
STANDARDS:
Unless otherwise specified elsewhere in this specification, the rating as
well as performance and testing of the line trap shall conform but not
limited to the latest revisions and amendments available at the time of
placement of order of all the relevant standards as listed hereunder.
2.1.1: LINE TRAP
Standard No.
Title
Sr.No.
1.
IEC 60353 Second Line Trap for A.C Power System
edition, 1989-10
LINE TRAPS FOR AC POWER SPECIFICATION.
2.
IS: 8792-1978
3.
IS: 8793-1978
4.
IS-9859 (Part- I) 1981
5.
6.
IEC 99
IEC 99 – 1(1970)
7.
10.
SYSTEMS - ( First Revision )
LINE
TRAPS
FOR
AC
POWER
SYSTEMS
METHODS OF TESTS ( First Revision )
CODE OF PRACTICE FOR INSTALLATION
AND MAINTENANCE OF OUTDOOR POWER
LINE CARRIER EQUIPMENT PART I LINE
TRAPS (Incorporating Amendment No. 1)
Lightning Arresters
Part-1, Non-linear resistor type arresters
for a.c system.
IEC 60099-4/2006 Metal-oxide surge arresters without
gaps for a.c. systems
IS: 5561- 1970
Terminal Clamp/Connector
Sign & Seal of Bidder
Page 4 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
2.2
3.0
3.1
Equipment meeting with the requirement of other authoritative Standards,
which ensure equal or better performance that the standards mentioned above,
shall also be considered. When the equipments offered by the Bidder
conforms to other standards, salient points of difference between standard
adopted and the standards specified in this specification shall be clearly
brought out in the relevant schedule. Four copies of such standards with
authentic translation in English shall be furnished along with the offer.
CLIMATIC CONDITIONS:
The equipment to be supplied under these specifications shall function
satisfactorily, under tropical, humid, hot, salty and chemically polluted
climate with adverse temperature conditions.
Equipment to be supplied against this specification shall be suitable for
Satisfactory continuous operation under the following tropical conditions:
i) Location in the state of
GUJARAT
ii) Max. Ambient air temp. (°C)
50
iii) Min. ambient air temp. (°C)
3.5
iv) Average daily ambient air temperature (°C) 35
v) Maximum relative humidity (%)
95
vi) Average annual rainfall (mm)
1150
vii) Max. Wind pressure (Kg. /sq. mtr.)
150
viii) Max. Altitude above mean sea level
Not exceeding 1000 Mtrs.
ix) Isoceraunic level (days/year)
15
x) Seismic level (horizontal acceleration)
0.08 x 2g.
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. Smoke is also present in the atmosphere. Heavy
lightning also occurs during June to October.
4.0
PRINCIPAL PARAMETERS:
4.1
The Line Trap covered in this specification shall meet the technical
requirements listed hereunder.
4.1.1 PRINCIPAL TECHNICAL PARAMETERS OF LINE TRAP
Sr.
No.
1.
2.
3.
ITEM
Type of Line Trap Installation
Type of mounting
Suitable for system Frequency
Sign & Seal of Bidder
SPECIFICATION
To be inserted into high
voltage A.C transmission
line phase in series
Suspension
M 50 Hz N
Page 5 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
Sr.
No.
4.
5.
6.
7.
8.
9.
10.
11.
12.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21
ITEM
SPECIFICATION
Nominal System Voltage
220 KV
Highest System Voltage
245 KV
Rated Continuous Current
1250 A
Rated Short time current for 1
40 KA
second
Asymmetrical peak value of the 102 KA
First half wave of the rates short
Time current
Rated inductance
0.5 mH
Type of Tuning
Band tuned line trap
Blocking Band frequency range Band- I 100 to 160 KHZ
Band- II 150 to 500 KHZ
570 Ohm
Minimum Guaranteed resistive
Component of impedance in
Blocking Frequency range
Protective device
a) Non-linear resistive type
Gapped lightning arresters
For a.c system.
b) Polymer housed Metal
oxide surge arrester without
Gaps for a.c system.
Nominal discharge current of 10KA
protective device
Rated voltage of protective 9 KV
device
Minimum value of power 13.5 KV rms
frequency spark over voltage
(Dry & wet) of protective deice
Visual Corona Extinction Volt
156 KV rms
Radio influence Voltage (RIV) < 500 micro Volt.
Attenuation in tuned frequency > 7.5 dB
band
Maximum tapping loss over 2.6 dB
blocking Band I & II stated
above.
Maximum tapping loss based on 2.6 dB
blocking resistance.
Insulation class
Class F
Maximum working stress
Twice the weight of wave
trap + 500Kgs.
Sign & Seal of Bidder
Page 6 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
If there is a deviation in value of ‘Minimum Guaranteed resistive
Component of impedance’ for require Blocking Frequency range Band-I
and Band-II as above then clearly indicate the same
5.0
GENERAL TECHNICAL REQUIREMENTS:
A line trap, consisting of a main coil in the form of a inductor, a tuning
device and a protective device, is intended for insertion in a high voltage
power transmission line between the point of connection of carrier
frequency signals and adjacent power system elements such as busbar,
transformers etc. The tuning device connected across the mail coil ensures,
with proper adjustment, that the line trap presents relatively high
impedance at one or more carrier frequencies or carrier frequency bands,
whereas the impedance of the line trap at power frequencies is negligible.
A line trap may also be used to limit the loss of carrier-frequency at a
power system tee point.
5.1 Main Coil :
An inductor which carries the power frequency current of the high
voltage transmission line.
5.2 Tuning Device :
The combination of capacitor, inductor and resistors connected across
the main coil. All of these components may not be present at any one
time, depending on the carrier frequency requirements of the line trap.
5.3 Protective Device :
The device connected across the main coil and tuning device which
prevents the line trap from being damaged by transient over voltages
which may occur across it.
The protective device shall be so designed and arranged that neither a
significant alteration in its protective function nor physical damage shall
result either from the temperature rise or magnetic field of the main coil
at continuous rated current, rated short-time current or from emergency
overload current. It shall neither enter into operation as a result of the
power frequency voltage developed across the line trap by rated shorttime current nor shall it remain in operation after a response to a
transient over voltage which is immediately followed by the power
frequency voltage developed across the line trap by rated short-time
current.
Sign & Seal of Bidder
Page 7 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
6.0
DESIGN REQUIREMETS :
6.1 Ability to withstand rated short-time current:
The line trap so designed shall be capable to withstand the mechanical
forces produce by asymmetrical peak value Ikm of the short-time current
and the heating effect of the rated short-time current IkN.
6.2 Insulation level :
The insulation level for the insulation between the terminals of a line trap
is governed by the rated voltage of the protective device. The insulation of
the mail coil and the tuning device shall be adequately rated for:
a) The voltage developed across the line trap at the rated power frequency
by the rated short-time current. The rated voltage of the protective
device shall be higher than this voltage developed across the line trap.
b) The front of wave impulse spark over voltage or the residual voltage
caused by the nominal discharge current of the protective device, which
ever is higher.
6.3 System voltage insulation:
The system voltage insulation of a line trap is provided by insulator
strings or post insulators. The line trap system voltage insulation shall be
consistent with the other equipment in the associated high voltage
transmission network.
6.4 Tensile strength of suspension system :
The suspension system of a line trap shall be designed for a tensile stress
of at least twice the mass of the line trap in kilograms, multiplied by 9.81
to convert to newtons, plus 5000 N.
7.0
Accessories :
7.1 Bird barriers:
The bird barrier design shall be such that no entrance to the line trap shall
admit a sphere having a diameter of 16mm.
Sign & Seal of Bidder
Page 8 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
7.2 Terminal clamp/connectors :
The clamp shall be suitable for t win Moose ACSR conductor. The
clamp, connectors, nuts, bolts and hardware shall be of nonmagnetic material and shall conform to IS: 5561. The clamp shall be
fitted on incoming and outgoing pad of Line Trap with four Nos. of
Nuts & Bolts. The incoming and outgoing conductor shall be on other
side of the clamp fitted with the help of six bolts and nuts
arrangements. The clamps shall be suitable for horizontal and vertical
take off with conductor diameter 28mm to 32mm.
The clamp shall be designed to carry the continuous load of 1250 Amp
at 220KV and shall withstand a dynamic short circuit current of 40KA
for 3 second. The temperature rise shall not exceed 35 °C over 50 °C
ambient. All the castings shall be free from blowholes, surface blisters,
cracks and cavities. All sharp edges shall be blurred, rounded off and
buffed.
Clamp and connectors shall be designed so as to avoid corona
formation. The visual corona extinction voltage shall not exceed 156
KV (rms.). All nuts and bolts shall be suitably shrouded. Radio
interference voltage for clamp and connectors shall not exceed 500
microvolt at 156 KV (rms.). No current carrying parts of the Clamps
and connector shall be less than 10mm thickness.
8.0 RATING PLATES:
The main coil, the tuning device and the protective device shall be
provided with rating plates of weatherproof material fitted so that they are
readily visible. The inscriptions shall be indelibly marked and include the
following data:
Rating plate of the main coil:
a)
b)
c)
d)
e)
f)
g)
h)
i)
Manufacturer’s name & year of manufacture.
Type.
Serial number
Rated inductance (mH)
Power frequency inductance (mH)
Rated continuous current (A)
Rated power frequency (Hz)
Rated short time current (kA) and duration (s)
Total weight (kg)
Sign & Seal of Bidder
Page 9 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
Rating plate of tuning device:
a)
b)
c)
d)
e)
f)
g)
h)
Manufacturer’s name & year of manufacture.
Type
Serial number
Frequency band(s) (KHz)
Blocking impedance (minimum value) (Ohm)
Blocking resistance (minimum value) (Ohm)
Rated impulse protective level (kV)
Belonging to main coil with rated inductance (mH) and serial number
Rating plate of protective device:
a)
b)
c)
d)
e)
f)
Manufacturer’s name & year of manufacture
Type
Serial number
Nominal discharge current (kA)
Rated voltage of protective device
Minimum value of power frequency spark over voltage (Dry & wet) of
protective deice
Special name plate:
a) Manufacturer’s name & year of manufacture Or
Name of EPC Contractor if order for EPC project
b) Name of Customer
c) Name of Project ( In case of EPC project)
d) A/T No.
The Line Traps shall be of outdoor suspension type. Necessary
suspension device together with all accessories including insulators shall be
supplied along with line trap. The Line Trap shall be lightweight
suitable for hanging on the gantry of Sub station without creating any
clearance problem due to large diameter, length & weight of the Line
Trap. The bird barrier shall be fitted on both the sides of Line Trap. Line
trap shall be provided with single point single insulator string
suspension type arrangement only.
The Line Trap shall be supplied with fitted tuning pot and
Lightening arrester.
All the type test reports as per relevant IS/IEC of the Line Trap offered
shall be invariably enclosed with the offer. The offer without type test
report shall not be considered.
Sign & Seal of Bidder
Page 10 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
The Line Trap shall be fitted with top and bottom clamp with
Connector etc. complete in all respect for connecting line trap to line
side and equipment side respectively. The clamp, connector, nut, bolts, etc.
which is affected by magnetic field of line trap shall be of nonmagnetic material. All iron parts shall be hot dip galvanized. The
arrangement of minimum three nos. of tie rod assembly shall be
required to avoid shearing from thread of tie rod assembly.
9. G E N E R A L R EQUIREMENTS F O R B I D D E R S :
1. The bidder shall furnish the full technical details, O&M manual, QAP &
drawings for the Line Trap offered.
2. The bidder shall have the experience of at least 10 years of manufacture
& supply of similar type of Line Trap.
3. The bidder shall furnish the full details of the orders executed.
4. Any deviation shall be clearly indicated separately.
5. The GETCO reserves right to increase or decrease the quantity at the
time of placing the order.
6. The GETCO reserve right either to accept or reject any of the offers
Without assigning the reason.
10. DRAWINGS :
The following drawings indicating all the dimensions and weight etc.
with complete technical details shall be enclosed together with technical bid:
(i)
General arrangement for Line Trap indicating dimensions,
technical parameters, weight etc.
(ii) Suspension arrangement indicating dimensions.
(iii) Name plate for line trap
(iv) Name plate for tuning pot
(v) Name plate for protective device
(vi) Special Name plate
(vii) Tuning pot ckt arrangement
(viii) Details of terminal clamp/connectors suitable for twin ACSR
Moose conductor.
(ix) Suspension fittings (hardware) for line trap
(x) Disc Insulator with general technical specification
(xi) Lightning Arrestor as protective device for Tuning Pot.
(xii) Bird barriers
(xiii) Other accessories of Line Trap.
(xiv) Any other components/drawings not covered.
The offer without the above drawings and insufficient technical data
will be evaluated accordingly or shall be liable to be rejected. Along with the
drawings bidder shall have to submit the QAP with following details for the
equipment offered.
Sign & Seal of Bidder
Page 11 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
a) Title page with details
• Manufacturer Name & Address
• Item
• QAP No.
• Rev. No.
• Date & Total No. of Pages
• Project
• Customer
• Order No. Or A/T No.
• Name of Contractor ( For EPC project)
b) Standard Quality Assurance PLAN for Line Traps with complete details
about Raw-Material and Bought out Items to be used in manufacturing of
wave trap and list of routine/ acceptance test (all that acceptance test
mentioned at Sr. No. 12 here under). Also the QAP shall have details of
Agency and type of function (perform or witness or verification) to be
conducted by agency for each individual component and operation details
given in the table.
11. TYPE TESTS:
The Bidder shall have to submit following valid Type test reports
The offer without Valid Type test reports shall be liable to be rejected.
LIST OF TYPE TEST REPORTS FOR 220KV, 0.5 mH, 1250A Wave Trap:
1. Measurement of inductance of mail coil
• power frequency inductance
• Rated inductance
2. Temperature rise test
3. Short Time Current Test for both Mechanical & thermal behavior.
4. blocking impedance Measurement test
5. Measurement of blocking resistance
6. Tapping loss Measurement
7. High Voltage test
• Corona inception / Extinction test
• Radio Interference Voltage test
• Lightning impulse voltage withstand test.
• Power frequency voltage withstand test.
Sign & Seal of Bidder
Page 12 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
LIST OF TYPE TEST REPORTS FOR PROTECTIVE DEVICE:
1. Insulation withstand tests on the arrester housings
2 Residual voltage test
a) Steep current impulse residual voltage test
b) Lightning impulse residual voltage test
c) Switching impulse residual voltage test
3 Long-duration current impulse withstand test
4 Operating duty test
a) High-current impulse operating duty test
b) Switching surge operating duty test
5 Short circuit
6 Arrester disconnector/fault indicator (when fitted)
7 Polluted housing test
8 Internal partial discharge test
9 Bending moment
10 Environmental tests
11 Seal leak rate
12 Radio interference voltage (RIV)
13 Power frequency Voltage Versus Time characteristics
14 Standard lightning Impulse spark over test
15 Front of Wave Impulse spark over test
16 Power Frequency spark over voltage test (dry & wet)
17 Moisture ingress test
18 Weather ageing test
LIST OF TYPE TEST REPORTS FOR TERMINAL CLAMP/CONNECTOR
(Suitable for Twin ACSR Moose) :
1.
2.
3.
4.
5.
6.
7.
8.
Short time current test
Corona Inception/Extinction test
Radio Interference Voltage test
tension Load test (Tensile test)
Resistance test
Temperature rise test
Galvanizing test on Bolt, Nut & plain washer
Dimensional Check
12. ACCEPTANCE TESTS:
1. Measurement of blocking resistance & blocking impedence
2. Power frequency voltage test on tuning unit
3. Measurement of rated inductance of main coil
4. Measurement of Power frequency inductance of main coil
5. Measurement of tapping loss & tapping loss based on resistance
6. Dimensional & Visual check
Sign & Seal of Bidder
Page 13 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
13. SCOPE OF SUPPLY:
•
•
•
•
•
•
•
•
The bidder shall have to supply the wave trap offered with
Tuning pot
Lightning arrestors
Single point suspension arrangement type insulator string assembly
Clamps & Connectors suitable for twin ACSR Moose conductor
Bird barriers
Suspension hardwares & accessories
O&M manual
Any other accessories necessary for installation of wave trap.
The Guaranteed technical particulars of Line Trap shall be furnished in
separate schedule-A. Technical data for protective device in annexureA1, Technical data for tuning device in annexure-A2, Line trap
construction data in annexure-A3 and deviation in annexure-A4 shall be
brought out separately.
Sign & Seal of Bidder
Page 14 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
GUARANTEED TECHNICAL PARTICULARS
(To be furnished by the bidder)
Sr.No. Particulars
Schedule - A
1
Name of Manufacturer and Country
2
Type / Model
3
System voltage rating
4
Continuous current rating at 50 deg centigrade
Maximum symmetrical short circuit current
5
rating for 3 sec. Duration
Asymmetrical peak value of first half wave of
6
rated short time current
7
Rated inductance
8
Blocking range
Minimum Guaranteed resistive component in
9
blocking frequency range
To be furnished by bidder
a) Centre Frequency
10
11
12
13
b) Over Blocking Range
Type of tuning
Variation in 50Hz impedance over degree
centigrade variation in ambient temperature.
Variation in resonant frequency band per
degree centigrade variation in ambient
temperature.
14
Impedance at tuned frequency.
Change in impedance per degree
Centigrade change in ambient temp.
15
Attenuation in Tuned Frequency
Band.
16
Attenuation at the distance of 10 kHz from the
tuned frequency band.
17
18
19
20
21
22
23
24
25
26
Maximum Tapping loss
Type of Mounting
Class of insulation of line trap
Temperature rise in line trap under rated
continuous current (Specify the value)
Visual corona Inception voltage
Visual corona Extinction voltage
Radio interference voltage
Type of incoming & outgoing terminal
Maximum working stress
Ultimate tensile strength
Sign & Seal of Bidder
Page 15 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
Sr.No. Particulars
Annexure – A1 : Technical data for protective device
Type of Protective device provided for
1
protection of capacitors and coil against
voltage surges & type of class
2
Basic Insulation level
Standard nominal discharge current of
3
protective device for 8/20 micro second wave
impulse
Rated voltage of the protective device
4
(Arrester)
Minimum value of power frequency spark over
5
voltage (dry & Wet) of protective device
Impulse spark over voltage of protective
6
device
Virtual steepness and maximum front of wave
7
impulse spark over voltage of protective
device
Maximum residual discharge voltage of
protective device for 8/20 micro second
impulse discharge current of
8
a) 5000 A
b) 10000 A
To be furnished by bidder
Sr.No. Particulars
Annexure – A2 : Technical data for Tuning device
1
Power frequency withstand voltage for 5 sec
2
Tuning band arrangement
a) Band –I
b) Band – II
To be furnished by bidder
Sr.No. Particulars
Annexure – A3 : Line trap construction data
1
Material of main coil
2
Material of terminal connector
3
Material of suspension link
4
Material of mounting hard wares
5
Net weight
6
Whether corona rings are provided?
7
Whether Bird barriers are provided?
8
Overall diameter
9
Total height
10
No. of turns in Line trap main coil
11
Type of conductor whether solid or stranded
12
Cross sectional area of conductor
13
Overall conductor size
Type of construction i.e. No. of coils and
14
whether open type or covered with insulating
material
Type and material of spacers between turn to
15
turn
16
No. of tie rods in tie rod Assembly
To be furnished by bidder
Sign & Seal of Bidder
Page 16 of 17
GETCO/E/TS-220KV WT 0902/R1, Dt: 10.06.2010
Sr.No.
Particulars
Annexure – A4 : Deviation if any from technical requirement
SCHEDULE OF REQUIREMENTS
Sr.No.
Description
Quantity
1.
220kV, 0.5mH, 1250 Amp line trap
with blocking band of Band-(I)100 to 160KHz & Band-(II)- 150 to
500KHz and Rmin=570 Ohm and
single
point
suspension
arrangement including suspension
insulator
string
assembly,
clamps/connectors and require
hardware & accessories
Sign & Seal of Bidder
Page 17 of 17