remote control equipment - Indian Railways Institute of Electrical ...
remote control equipment - Indian Railways Institute of Electrical ...
remote control equipment - Indian Railways Institute of Electrical ...
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fault relay (132KV&25KV side)<br />
4. IDMT overcurrent relay CDG-16 80-320% Of 5A<br />
(25kv side)<br />
5. Aux relays for buchholz VAA-33<br />
excessive winding and oil<br />
tem tripping<br />
B) OHE PROTECTION<br />
1 MHO type directional YCG-14 0.33 to 12 ohm extended<br />
distance protection zone each upto 60 ohm<br />
relay(DPR) <strong>of</strong> 5A with MTA 75 de<br />
gree<br />
2 MHO relay for protection YCG-14 0.33 to 12 ohm extended<br />
against wrong phase zone reach upto 60 ohm<br />
coupling(WC) <strong>of</strong> 5A with MTA 125 de<br />
gree with forward <strong>of</strong>fset<br />
<strong>of</strong> 11%<br />
3. Instantaneous high set CAG-17 100-800%<strong>of</strong> 5A<br />
over current relay on<br />
25KVside(OC)<br />
C) AUXILIARY RELAYS<br />
1 D.C Supervision<br />
i) Transformer HV CB VAA-11<br />
Trip supervision<br />
ii) Transformer LV CB VAA-11<br />
iii) 25KV Feeder <strong>control</strong> VAA-11<br />
iv) 25KV intrruptor <strong>control</strong> VAA-11<br />
v) 5.DC fail alarm cancel VAA-11<br />
vi) Alarm annunciation VAA-11<br />
<strong>control</strong><br />
SN Discription Type Rating/setting<br />
design range<br />
2. Auxiliary realy for VAA-11<br />
contact multiplication<br />
<strong>of</strong> directiional distance<br />
protection relay(YCG-14)<br />
3. Alarm bell realy VAA-21<br />
4. Flasher relay VAA-21<br />
5. Timer relay for single VAT-11<br />
shot Auto-Reclosing<br />
102
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