Answer / 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%

Answer / vijay raskar

When earth fault is occured then relay is set at 2.5 times
than rated current.

Answer / erharisheee51

we have to connect earth fault relay through current
transformrs , at the neautral side of the generator and
transformers.

Answer / j.kesavan

POWER CIRCUITE R,Y,B PHASE USING THREE CT ,THIS CT OUT PUT
CONNECT IN OVER CURRENT AND EARTH FAULT RELAY , IF ANY ONE
PHASE TAKE MORE CURRENT OR EARTH FAULT THIS RELAY WILL
TRIP.SETTING THIS RELAY MINIMUM CURRENT,MINIMUM DELAY.

Answer / motilal sahu

WHEN EARTH FAULT OCCURE HIGH CURRENT FLOW THOUGH LINE.

IF THIS CURRENT IS 10-115 TIMES OF FULL LOAD CURRENT THEN
SHOW THAT EARTH FAULT OCCURE
SO SET THE RELAY FOR 10-15TIME OF FULL LOAD CURRENT

in india are trains run by DC or AC? if DC , from where it receives negative potential? because pentograph receives singe potential only?

2 Answers   GATE, PSU,

what is slip rings in an induction motor&what is it's work.

4 Answers  

what is wave trap? And how it works?

3 Answers  

in Megger what type of voltage(AC or DC) are produce.how they work.

1 Answers  

what ever the ups kva it may 500 kva or 500 va always out put is AC 240 volts its right?

3 Answers  

What is the safety factor is to be consider while selecting the switchgear and protection for electrical system

1 Answers  

how to check 3phase motor winding with help of multimeter?

2 Answers  

If the maximum demand is 120 KVA in a building, then what is the Current taken according to load given ? Formula for it ?

3 Answers  

Please give me a ansver for why currant transforme noe point should erthing

1 Answers  

what is the safty of poly phase tranformer?

0 Answers   Adani,

what is meaning of bus riser

0 Answers   TeamLease,

What are the Application of CT & PT ?

2 Answers