Answer Posted / hirak subhra majumder
In Several sub-stations and power houses a special type of
installations is applied i.e. generally O/C relay for B and
R phase and Earth fault relay for Y phase. From there the
three trip connections are coming out and is connected to
the master trip coil. Now this relay output is connected to
the circuit breaker. Thus the other relays works here as
slave(Not mandatory) and the later one as master controlling
the operation of the circuit breaker.
| Is This Answer Correct ? | 18 Yes | 3 No |
Post New Answer View All Answers
how can i use REF and diffrencial relay both in 1 CT core for transformer protection?
what are problems caused by the pdu in rack server
how to find Harmonics and types as per the equipemnts
why output is out of phase in case of common emitter?
How the over load setting for HT Motors calculated-provided in Numerical Relay
WHERE CAN I GET THE PREVIOUS QUESTION PAPERS OF Govt Polytechnic in deee 2nd year papers
why capacitance effect is predominant in underground cable transmission and inductance effect is predominant in over head line transmission?
why are distributed windings generally used in alternators?
what is load vs Torque curve & why it is used?
in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain
how does a liquid starter reduce the starting currents?
How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.
What is the automatic voltage regulator with servomotor?
what is the safe meggar values for motor, transformer HT, LT and Cables? IF we want to replace I/C bay at our 220 kv substation which is of 140 mw load capacity bay to be replaced by 400 mw capacity bay.other than CT(1200/1) what are the other equipment i have to replace. why we generally use 3.5 core cable or in other word 1/2 core for neutral and also confirm me that in balance conditiob(3 phase)current in neutral will zero
can anybody tell me that for p.f. Improvment we use capacitor banks but how to decide its capacitance. As we all know how to calculate kvar but what abt capacitance value
