SPECICATION NO. ETI/PSI/144 (12/91) SPECIFICATION FOR ... - rdso

More documents

Recommendations

Info

(b) Delta-I type fault selective relay. (c) Instantaneous over-current relay (d) Under-voltage relay to avoid wrong phase coupling 4.3 Auto reclosing of feeder circuit breaker: A single shot auto-reclosing scheme for the feeder circuit breaker at traction sub-station has been adopted to facilitate reclosing of the breaker automatically once, after a pre-set time delay after tripping of the breaker on OHE fault. This feature will help in quick restoration of traction power supply to OHE if the fault is of a transient nature. 4.4 All traction substations and switching stations are normally unattended and off circuit tap changer of the transformer, circuit breakers, interruptors, and motor operated remotely from the RCC through the SCADA equipment. 4.5 The off circuit tapchanger of the transformer, circuit breakers, interruptors and motor operated isolators could also be operated locally as well as manually at the TSS, SP and SSP as the case may be. At the TSS, a local/remote changeover switch is provided on the control panel, as well as in the mechanism box of the circuit breaker, interruptor and motor operated isolator. No control panel exists for the interruptors /circuit breakers at the SP and SSP and therefore the local/remote changeover switch is provided on the mechanism box of the interruptor/circuit breaker. 5.0 General Information 5.1 Remote Control Centre 5.1.1 The building, provided by the Railways for housing the RCC, shall include the main control room, equipment room, UPS room,RC laboratory and battery room. The layout of the RCC and the equipments therein will be decided by the `Railways‘. 5.1.2. The RCC will be suitably illuminated, and the equipment room, control room and RC laboratory may be air-conditioned, if convenient, or else filtered air will be blown through to cool the equipments, by the Railways. The SCADA equipment shall be designed to give satisfactory Service without air-conditioned. 5.1.3. Necessary cable trenches will be provided by the Railways. 5.1.4. The computer furniture for operator workstation shall be supplied by the successful tenderer. It shall include: (i) One table and one chair for each workstation. (ii) Two tables, one for each data logger, and (iii) One table and one chair for the Engineer‘s workstation. The furniture shall be procured from M/s Godrej or other reputed manufacturer as per the basic design enclosed a Appendix 2 to this specification. 5.2 Control room building at controlled station: 5.2.1. A control room building will be provided by the Railways at each TSS, having an equipment room and also a battery room. This equipment room will house the - 6 -
main control and relay panel, 240V a.c. and 110V d.c. distribution board, 110V battery chargers, telephone apparatus as well as RTU(S). The battery room will house the 110V and telephone batteries. A Typical layout of the control room building is indicated in Drg. No.ETI/PSI/0238. Mod.B at Appendix.3. 5.2.2 A small masonary building will be provided by the Railways at each SP, SSP and ATP, having an equipment room and a battery room. The equipment room will house RTU, battery charger, terminal board, 240V a.c. distribution board and telephone apparatus. The battery room will house 110V and telephone batteries. A typical layout is indicated in Drg. No.ETI/PSI/0010, Mod.D Appendix 4. 5.2.3 The buildings at controlled stations are not air- conditioned. Suitable illumination inside the rooms shall be provided by the Railways. 5.3 Operation of circuit breakers, interruptors and motor operated isolators at controlled stations 5.3.1 The closing and tripping circuits of the circuit breakers, interruptors and motor-operated isolators are designed to operate off 110V battery supply, the batteries being provided by the Railways. 5.3.2 Interposing contractors, for operating the closing and tripping circuits from RCC shall form part of the SCADA equipment. The contractor shall be suitable for 110V d.c. supply varying from +10% to -15%. The contacts of contractors shall have a continuous current carrying capacity of 10A, making capacity of 20A and breaking capacity of 2A inductive load. The contacts are liable to damage due to breaking of inductive current in the trip/closing coil circuits and therefore an arrangement for spark quenching, if necessary, shall be provided. Besides, the interposing contractors shall be so designed that it remains energised for a period adjustable between 500ms and 2s, arrangement for which shall be provided on the control output card in the RTU. These measures are required to prevent damage to the contacts. 5.4 Monitoring of the state of catenary Outdoor type 27.5kV/110V, 100VA potential transformers are installed at the controlled stations by the Railways for monitoring the state of sub-sectors of the catenary i.c. Whether energized or not and for under-voltage relay operation at the SPs. The catenary voltage sensing shall be done through rectifier and solid-state comparator circuits so designed that the de-energised indication on the MDB/VDU appears at a voltage selectable between 50% and 70% and disappears between 60% and 80% of the rated voltage viz 110V a.c. 5.5 Telesignals and their monitoring 5.5.1 The various telesignale from typical TSS, SSP, SP and ATP in a double line section to the master station are as under: I. From each TSS (a) Name of telesignal 1. 110V d.c. low. 2. 240V a.c. fail. 3. Catenary-1 fail/feeder-1 P.T. fuse fail.* 4. Catenary-2 fail/feeder-1 P.T. fuse fail.* 5. Catenary-3 fail/feeder-2 P.T. fuse fail.* 6. Catenary-4 fail/feeder-2 P.T. fuse fail.* - 7 -
Page 1 and 2: SPECIFICATION FOR SPECICATION NO. E
Page 3 and 4: 2.3 Atmospheric Conditions Maximum
Page 5: phases of the 220 or 132kV, three p
Page 9 and 10: indicated by operation of Buchholz
Page 11 and 12: - 11 - ―PT fuse fail‖ indicatio
Page 13 and 14: - 13 - 5.8.8. The Railways will tap
Page 15 and 16: - 15 - (ii) There shall be two data
Page 17 and 18: 6.1.3. Mimic diagram board (MDB) -
Page 19 and 20: equipments status including manuall
Page 21 and 22: shall confirm in the offer that the
Page 23 and 24: 6.1.6 Data-logging printers - 23 -
Page 25 and 26: - 25 - 6.2.3.2 The ac supply will h
Page 27 and 28: 6.4 Equipment capacity - 27 - 6.4.1
Page 29 and 30: - 29 - 6.5.2 Whenever the number of
Page 31 and 32: - 31 - channels and other such aids
Page 33 and 34: e so engineered that they are clear
Page 35 and 36: 6.12.4.4 The system shall also take
Page 37 and 38: where, Ln, Ln+l = kilometerage of t
Page 39 and 40: 7.2 The required quantity of instru
Page 41 and 42: - 41 - 11.4 Only after clear writte
Page 43 and 44: - 43 - c) Detailed step by step pro
Page 45 and 46: - 45 - ANNEXURE-I TYPICAL REQUIREME
Page 47 and 48: - 47 - ANNEXURE-2 SCHEDULE OF GURAN
Page 49 and 50: - 49 - ii) Battery voltage and ampe
Page 51 and 52: - 51 - ii) Limits (field settable)
Page 53 and 54: c) Number of controlled stations th
Page 55 and 56: 40. Level meters ( dB Meter) i) Mak
Page 57 and 58:
ix) Rated accuracy limit factor 15
Page 59 and 60:
- 59 -
Page 61 and 62:
SS -TRACTION SUBSTAION. TP -AUTO TR
Page 63:
- 63 -
show all

SPECICATION NO. ETI/PSI/144 (12/91) SPECIFICATION FOR ... - rdso

Create successful ePaper yourself

Delete template?

Save as template?