Interested to Buy Any Domain ? << Click Here >> for more details...
why we are using DC supply for all protection relays, why
cant we use AC supply..???
- 1 Answers
- 5292 Views
- I also Faced
- E-Mail Answers
Answer Posted / n k singh
We can use AC also but additional shading ring must be
provided which gives sufficient phase displaced flux for
relay to be continuously on in negative half cycle of AC
supply also. In case of DC the flux is unipolar hence relay
will be on if DC is available.
| Is This Answer Correct ? | 5 Yes | 3 No |
Post New Answer View All Answers
why Induction Generators are not "Black start" ? and apart from WTGs where this types of generator are generally used?
What are the parameters of water ( Water quality )to be monitored in Centralised HVAC ( water cooler chillers )
hello everybody. what does an abnormal stator winding impedance or dc resistance show? thanx
Define super node?
what id a dry type transformers and its function ?
The power supplied to a 50mH inductor from a 120V, 60Hz source will be
what is differentila pilot supervision in the incomer control panel in the power station?
What is instrumental error?
What will be the current if the resistance total in a series circuit doubles?
Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?
IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?
in a simple IDMT relay we use neutral point of ct for earth fault then what is the requirement of neutral ct and cbct?
what mean by analog ,digital,numerical meters and relays? say the example?
A 11KV, 1200 A breaker combination fixed in a cubicle for HT motor.Is normally for 11 KV motor fuse is using? if Yes, What range fuse is required?
Is there any standard guidelines/Criteria to design NGR/NGT.?
