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

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- 56 - ANUEXURE= 3 SALIENT FEAATURES OF 25KV CURRENT AND POTENTIAL TRANS<strong>FOR</strong>MERS A) Current Transformers i) Type Low reactance, single phase, oil filled, ii) a) National system voltage 27 kV b) highest equipment voltage 52 kV iii) Frequency 50 Hz iv) Rated primary current 1000/500 A v) Rated secondary current 5 A. vi) Rated transformation ratio 1000-500/5 vii) Rated burden 60 VA viii)Accuracy class 5P self-cooled scaled outdoor types.
ix) Rated accuracy limit factor 15 x) Rated short-time thermal current 25 kA (r.m.s.) for 1sec. xi) Rated dynamic current 62.5 kA (peck) B) Potential transformers, Type III i) Type Oil- immersed, self-cooled, core / shell type, suitable for outdoor use. ii) Rated system voltage 25kV nominal subject to variation from 19 kV . to 30 kV. iii) Frequency 50 Hz iv) type of connection Between Phase and earth c) Potential Transformers, Type-III ( Cont.) v) Rated primary voltage 27.5 kV vi) Rated secondary voltage 110 VA vii) Rated burden 100 VA viii) Class of insulation ‗A‘ class ix) Rated voltage factor 1.1 (Continuous) ----------------- - 57 -
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SPECIFICATION FOR SPECICATION NO. E
Page 3 and 4:
2.3 Atmospheric Conditions Maximum
Page 5 and 6: phases of the 220 or 132kV, three p
Page 7 and 8: main control and relay panel, 240V
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: 40. Level meters ( dB Meter) i) Mak
Page 59 and 60: - 59 -
Page 61 and 62: SS -TRACTION SUBSTAION. TP -AUTO TR
Page 63: - 63 -
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SPECICATION NO. ETI/PSI/144 (12/91) SPECIFICATION FOR ... - rdso

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