how set earth fault over current in relay
- 5 Answers
- 15706 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
is it possible to say motor horsepower number without seeing name plate(when name plate damaged)
Draw the equivalent circuit of crystal oscillator?
what is meant by 2 within a star in a voltmeter dial?
how slip power recovery system work
how to calculate regulation constants for over head lines? and what are the regulation constant for raccoon conductor at different voltage level and different P.F?
When lag/lead/lag-lead compensation is employed?
What is the capacitance values of 132,220,400 & 765 kV current transformer
What is warm / cold start of HT motors. How many warm start & cold start are possible in a day?
a starter used for squirrel cage induction motor?
How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs
Where should the lighting arrestor be placed in distribution lines?
what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)
Name the test signals used in control system
Define transfer function?
My question is abt backlog.I had dropped one subject in my second year, and completed this subject in the 3rd attempt, so how many backlogs i have got?1 or 3?plz sujjest the answer as soon as possible
