What are the possible causes of REF operation on a power
transformer
- 4 Answers
- 5877 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
Please note that REFR will not act under earth faults in
phases beyond the CTs. As its coverage is limited
(restricted) to Tr only ,it is called ristricted earth
fault relay.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
WHY THE RATINGS OF THE TRANSFORMER IS 33KV WHY NOT OTHER???
Please tell me the power flow from pmg to main rotor of an alternator (Including AVR unit)?
What OPGW is better than Microwave or PLCC???
How to calculat the ratio of HT\LT in energy meter
If a high resistance fault occurs,then what are the changes will happen in the system?
What is the vector group of a transformer,how can it be found out?
how to determine motor size for a fan application?
2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?
Define reserve-generating capacity?
why ct's&pt'S out put called as burden,why compelsary short ckt the secondary of ct's while removing the burden?
is this the formula of building wiring to get the main breaker.Watts/volts*.8%+higher motor*(25%)=ampere. yes or no or send the correct formula for building wiring.
what is the working principle of energy saver control panel. please give the complete calculation & theory.
what is an unbalance in acircuit? in a three phase 3wire circuit how an unbalance will come? in a three phase four wire system how an un balance is coming?
What are IR values and what it should be for coil and for insulator
what is meant by surge? what we called for high currents?
