how set earth fault over current in relay
- 5 Answers
- 15770 Views
- Jacobs, Reliance, I also Faced
- E-Mail Answers
Answer Posted / kiran sule
In any relay Set earth fault to minimum That means If Earth
fault range is 20 to 80 % of secondary current then set it
to 20% . In case of over current calculate rated current
and add 5%for relay & ct error and 5% to over load that
means set it to 110% to full load capacity.
If for 200/1 CT If full load current is 160 that mens 80%
to secondary current of Ct+10% relay CT error and Over load
that means relay ia seted to 180A interms of secondary at
0.9 a that means 90%
| Is This Answer Correct ? | 19 Yes | 2 No |
Post New Answer View All Answers
I have 4 busbar of 1000 ampere. we use 4 busbar to make 4000 ampere in one phase.my problem is that when we applied 60% load on that then busbar produced high noise.what is the reason of that and how can i minimize that noise.
What Is Sampling?
what is the id1 & id2 setting in differential protection relay of CSPC?
What is transient Phenomenon?
what are problems caused by the pdu in rack server
How phase to phase voltage comes 440V.
what is load despatching
description about dry type transformers
can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??
why to use freewheeling diode ( diode in revers bias mode) across dc coil
What is domestic transformer? Draw the connection of domestic transformer.
please give me all the Alarm .Trip ,Safety Relays & Conditions of Chiller mail me on ashokbabunhce@gmail.com
how to discharge 3 phase power factor correction capacitors
What is the de rating factor of cable? What is the importance of the de rating factor in cable select
What is rotating magnetic field?Discuss elaborately.
