220-66-kv-xmer-on-line-nifes-r4-sept-08 - Gujarat Electricity Board

GETCO/E/TS – XMER01power/R4 Sept 08
32. Thickness of transformer tank plates :
i) Sides (mm) :
ii) Bottom (mm) :
iii) Cover (mm) :
iv) Radiator (mm) :
33. (A) POWER FREQUENCY WITHSTAND VOLT:
i) Test voltage for 1 min. P.F. withstand test on :
live end of high voltage winding (KV rms)
ii) Test voltage for 1 min. P.F. withstand test on :
neutral end of high voltage winding (KV rms)
iii) Test voltage for 1 min. P.F. withstand test on :
live end of low voltage winding (KV rms)
(B) IMPULSE VOLTAGE :
i) Test voltage for 1.2/50 micro sec. Full wave :
withstand test on high voltage winding
(KV crest) on.
ii) Test voltage for 1.2/50 micro sec. Full wave :
withstand test on low voltage winding
(KV crest) on
34. Inter-turn Insulation :
i) Extent of end turns reinforcement :
ii) Extent of reinforcement of turns adjustment :
to tap
iii) Test voltage for 1 min. 50 Hz. Inter-turn :
insulation test on (i) (KV rms)
iv) Test voltage for 1 min. 50 Hz. inter-turn :
insulation test on (ii) (KV rms)
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