SUPPLY OF CARRIER PROTECTION COUPLER TYPE NSD-50
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1 (I) GENERAL : Indoor PLCC Equipments are required for important 400KV, 220KV and 132KV Sub/station for Speech, Data Transmission, Protection and Teleprinter Links. (II) GENERAL REQUIREMENT : The equipments shall be of latest components, technology and highly reliable. The equipments offered must have been type tested. (III) SCOPE OF SUPPLY : Protection Couplers NSD-50 with three modules shall be supplied along with fixing channel, required accessories and the terminal blocks fully wired complete in all respect with identification mark. The carrier protection shall be integrated with carrier terminal by just inserting the modules in respective slots of carrier terminal. You will have to impart free training of protection coupler type NSD-50 along with ETL version carrier equipments to at least 3 to 4 telecom engineers of G.E.T.C.O to get acquainted with the technology for our new incumbents. (IV) SPECIFICATION : The equipments to be supplied under this specification shall function satisfactorily under tropical, hot, humid, salty and chemically polluted climatic condition with adverse temperature condition. The equipment shall be manufactured and tested as per latest national or international standard (IS, IEC, CCITT, CIGRE, etc.) whichever is better. This will be clearly brought out by the bidder. The equipments offered shall confirm to, but not limited to following standards. (1) IEC Single sideband Power Line Carrier Terminals. (2) IEC 834-1/ Performance & Testing of teleprotection (Part-I) equipments of Power system - Narrow band Command system. (3) IEC / Environmental Testing Part-2 Tests section-3 Test Ca: Damp heat steady state. In addition to the above, the carrier Protection coupler shall be manufactured and supplied detailed as under: GETCO/E/TS-PLCC 03403/R0, Dt: Page 1 of 11
2 (IV)(A) TELE PROTECTION EQUIPMENT : The bidder shall offer Teleprotection Equipment which works on coded and un-coded signal principle for transmission/reception of protection signal detailed as under. The equipment shall be suitable for; connection to the Power line carrier terminal for remote end tripping/blocking on permissive and Direct Tripping signals to be transmitted through single PLCC Channel. The requirement is as under: - (a) Teleportation Equipment with 4 commands. It should be suitable for permissive and direct trip carrier aided protection scheme. The command should be either All coded OR Two coded + Two uncoded commands. It should work in full-duplex mode for both 2/4-command versions. The Tele-Protection Equipment shall have provision for: - Signal Inputs/Outputs No. of starting inputs No. of command inputs Command O/P using solid state relays Command O/P for unblocking outputs Condition Requirement Two Command Equipment Four Command Equipment (D.C. Isolated 48V- 250V DC & <10 ma 2 4 DC isolated, N/O contact 250VDC, <2A N/O contact 250V DC, 10W 2 4 Alarm Outputs 250V D.C.150 Watts 4 * 4 * Counters Separate for each Tx and Rx Commands Power supply Working from PLC Terminal 48V DC (+ 20%,- 15%) * 2 Common alarms, N/O OR N/C contact 1 Transmitter alarm, N/O contact 1 Receiver alarm, N/O contact GETCO/E/TS-PLCC 03403/R0, Dt: Page 2 of 11
3 The network protection signaling equipment shall not be only insensitive to corona noise, but shall also remain unaffected by impulse type noises which are generated by electrical discharge and by the opening and closing of circuit breakers, isolators, earthing switches etc. In the offer, bidder shall clearly explain as to what measures have been taken to make the equipment insensitive to corona noise, white noise and to impulse noise of amplitude larger than the wanted signal and submit full test reports. The equipment shall be unaffected by spurious tripping signals. The Bidder shall submit proof as to how this is achieved satisfactorily. The equipment shall be suitable for transmission of direct and permissive trip signal for protection of power lines and Sub-station Equipments. The equipment shall operate in the audio frequency range in speech band (0 to 2000 HZ). The protection signaling equipment shall be of solid-state design, modular in construction and have a proven operating record in similar application over EHV systems, with motherboard construction. The carrier protection channels shall be engineered in such a manner that time interval between receipt of a tripping/blocking command from the protection relays on the transmit side by its transmission over the carrier link, reception at the far end and giving of the commands to trip relays at the distance end shall not exceed 20 msec for permissive tripping and 30 msec. for direct tripping even for the longest line section. Operating time lower than specified above may be preferred provided they fulfill the requirements of security and reliability as below & also meet the requirement of the standard IEC first edition 1988 & latest amendment if any. For For Permissive Trip Direct Trip (Uncoded) (Coded) False - Trip probability < 2x10-4 < (Noise burst of any amplitude) Fail to trip probability < 5x10-1 < 10-2 For S/N 6db in 4 khz Band (White Noise Measurement) It may be emphasized that specified time, as mentioned above, is composed of the following: (a) Back - to - Back signal delay in Frequency shift or coded signal protection equipment. (b) Back - to - Back delay in PLC terminal. (c) Delay in transmission line. GETCO/E/TS-PLCC 03403/R0, Dt: Page 3 of 11
4 (d) Operation time of inter posing relay, if any, frequency shift or coding equipment. It has to be ensured that under no circumstance protection channel should share the power. Each protection channel shall be able to transmit power for which system is designed. For example, a 20 W PLC terminal shall transmit 20 watt (max) for protection channel alone in the event of fault. Speech and superimposed data channels, in the same protection terminal must get disconnected momentarily during the protection signaling transmission. The equipment shall be constructed such that in permissive line protection system, operational reliability of the protection channel may be checked over the carrier link from end to end and by means of a loop test. It shall be possible to carry out the above tests from either end of the carrier link. During healthy condition of the transmission line, the loop test shall not initiate a tripping command. In the event of a system fault, while loop test is in progress, protection signal shall over ride the test signal. In the receiver section of Carrier protection signaling equipment the FSK signal shall be converted in to the coded pulses (i.e Bit Pattern) and evaluated digitally before giving final output command to tripping relays or relay protection equipments to achieve high dependability and security and also to provide reliability against false trip and loosing commands even under adverse channel condition. The equipment shall be complete with built - in Digital counters for counting the number of trip commands sent and number of trip commands received separately for each channel. The equipment shall be mounted inside the Carrier Terminal and shall be fully wired with, contactor units, tag blocks etc., and ready for commissioning. The bidder shall clearly indicate and describe the facility/items provided in the equipment in details. Any ambiguity or omission will mean that the particular facility or module etc., is not provided in the equipment. It shall meet the entire environmental requirement as that of carrier terminal. While transmitting protection signals the protection coupler shall cut off the speech and other less important channels and thereby the entire GETCO/E/TS-PLCC 03403/R0, Dt: Page 4 of 11
5 power of carrier terminal should be made available for transmission of protection signals. It should be brought out that the protection equipment should perform satisfactorily under noisy condition. The bidder shall indicate the guaranteed technical particulars of the equipment offered in Schedule - 'B'. A Schedule of deviation shall be attached separately for Teleprotection equipment in the form of Schedule - 'B/1'. (V) CONFIGURATION: The Configuration of Carrier Protection Coupler, Type NSD-50 shall have following different cards/prints. G4AA : DSP Module NSD 50 G4AC : Interface NSD 50 ( 2 Modules) PREQUALIFICATION REQUIREMENTS : 1. The bidder shall be Original Equipment Manufacturer of the Protection Coupler. The offered equipments should have been designed, manufactured and tested as per relevant IS/IEC Standards with latest amendments. 2. The bidder should indicate manufacturing capacity by submitting fresh certificate of a Chartered Engineer (CE). 3. Equipment proposed to be supplied by bidder of similar or higher rating shall be in service for a minimum period of THREE (3) years. The Satisfactory performance certificate of corporate office of respective utilities should be submitted. 4. The bidder should clearly indicate the quantity and single value contract executed during last FIVE (5) years, for the offered equipment. The details of past supplies should cover, i) Same rated equipment as Offered supplied to GETCO (Erstwhile known as GEB). ii) Higher rated equipment than Offered supplied to GETCO (Erstwhile known as GEB). iii) Same rated equipment as Offered supplied to other Utilities. 5. The bidder shall furnish the copies of type test reports for the Carrier protection Coupler not more than FIVE years old. Equipment Offered shall have all Valid Type Test Certificate from NABL accredited or GETCO/E/TS-PLCC 03403/R0, Dt: Page 5 of 11
6 International Laboratory. The Validity of Type Test report is 5 Years from the Date of Type Test Report. 6. The bidder shall furnish the full technical details & drawings for the Carrier terminal offered. 7. The bidder shall have the experience of at least 10 years of manufacture & supply of similar type of Carrier terminals. 8. The bidder shall furnish the full details of the orders executed. 9. Any deviation shall be clearly indicated separately. 10. The GETCO reserves right to increase or decrease the quantity at the time of placing the order. 11. The GETCO reserve right either to accept or reject any of the offers Without assigning the reason. (VI) TYPE TESTS: Valid type test reports not more than 5 Years old performed for following tests shall be submitted with the offer with all supporting result sheets and reference documents with List of Type Tests in Performa- X Given here under. Performa X: Sr.No. Test Equipment Description of test conducted Standard/ Clause Test report No. & Name of test laboratory Remarks All tests of carrier terminal Insulation test Impulse withstand Power supply variations Interruption test LF disturbance emission Reverse polarity Transmission time Interference by discrete frequency Checking of alarm functions Security Dependability Interference by frequency deviation Multi command equipment GETCO/E/TS-PLCC 03403/R0, Dt: Page 6 of 11
7 (VII) Drawings: Following Drawings shall be submitted with the offer. Module Layout For ETL 41+ NSD 50 : Unit Arrangement Cabinet Layout For ETL 41 + NSD 50 Wiring Diagram For ETL 41 + NSD 50 Cable Complete V9LB Cable Complete V9LC GETCO/E/TS-PLCC 03403/R0, Dt: Page 7 of 11
8 S C H E D U L E - 'B' General Data and Guaranteed Technical Particulars Teleprotection Equipment. No. System Particular GTP of offered equipment 1. MAKE and Type of Protection Equipment 2. No. of Commands: - Uncoded - Coded - Altogether 3. Test signal frequency(loop test) 4. Trip signal frequencies 5. Guard frequency 6. Command duration 7. Signal evaluation time 8. Nominal transmission times Including PLC equipment Delay & relay operating times * Nominal transmission time for - Uncoded - Coded 9. Security: False Trip Probability: 10. Dependability: Fail to Trip Probability For S/N of 6 db : 11. Unblocking operating time 12. Power supply 13. Ambient condition 14. Transmitter Module: Level - Guard signal PLC Pilot Or separate guard signal - Normal tripping signal - Test signal Spurious signal suppression Signal boosting 15. Receiver Module Level - Guard Signal - Normal tripping signal - Test signal GETCO/E/TS-PLCC 03403/R0, Dt: Page 8 of 11
9 S C H E D U L E - 'B' General Data and Guaranteed Technical Particulars Teleprotection Equipment. No. System Particular GTP of offerred equipment Dynamic range - Minimum level - Maximum level 16. Guard Signal frequency Programmable Standard setting 17. Nos. & type of Alarm outputs With voltage & current ratings. 18 Nos. & type of starting inputs 19. Nos. of type of command inputs 20. Method of tripping 21. Rated battery voltage and current Rating 22. Nos. & type of command outputs With voltage & current rating & Operating time. 23. Nos. & type of unblocking outputs With rated voltage, current limit & Operating time. 24. Transmission time and command Prolongation period for - Permissive Trip - Direct Trip 25. Trip Counters - display type - range - Standby supply Endurance GETCO/E/TS-PLCC 03403/R0, Dt: Page 9 of 11
10 S C H E D U L E ' B/1 (To be filled in and signed by the Tenderer) Schedule of deviations from Technical Specifications for. We / I have carefully gone through the Technical Specification and we / I have satisfied ourselves / myself and hereby confirm that our / my offer strictly confirm to the requirements of the Technical Specification except for the deviations given below : Sr.No. Description Stipulations in specification Deviation Offered Remarks Signature : Name of Authorized signatory of the company : Name of the tendering Company Date : Place: GETCO/E/TS-PLCC 03403/R0, Dt: Page 10 of 11
11 SCHEDULE OF REQUIREMENTS OF ABB MAKE NSD-50 PROTECTION COUPLER Sr.No. Description Quantity 1. Protection coupler Type NSD-50, Nos. Make: ABB suitable for four command (with 3 modules) transmission arrangement. GETCO/E/TS-PLCC 03403/R0, Dt: Page 11 of 11
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