Answer / giri

ELR is earth leakage relay,as its name indicates it's used
for protection against earth leakage.

Answer / rk

ELR or commonly known to be EL CB . all 3phsaes and netral
of the incommin supply passs throuh oone ring type ct so
that there will be no current in CT secondary if there is
healthy system but in case there is a ground fault at load
end the cT will record the unbalance current and the relay
will sence the fault.beacuse durring ground fault the fault
curent will pas througth ground to the sourcr insted of
throug the neural inside the ring CT.

Answer / roshan thakur

ELR is earth leakage relay.this is very sensible for leakage.and this is generally used in panel for protection if MCCB.

Answer / rvg

ELR is earth leakage relay, and main attraction is its high
current rating, and it can use with CT also(with suitable
calibration).
ELCB are less current capacity ELRs and using ferromagnetic
substances with differential relay.

Answer / tushar

Just I want to know about ELR. We have connected ELR With Incoming panel(800A). That ELR is getting Trip within Seconds. Equipments are not getting any Earth Leakages. No shock effect from equipments… I am not able to Understand what is exact problem..Pls Let me know Reason.

Answer / ritesh singhal

this full name is earth leakage relay . basically relay
used in diffrential current transformer

Answer / usha

ELR is Emergency Load Relay.

what is under coal gassification?

0 Answers  

hoe we can exlain the effect of caoacitor in fans????????

1 Answers  

IN CONTROL SYSTEMS Y WE NEED TO KNOW THE STABILITY OF THE SYSTEM?WHAT IS ITS PRACTICAL USE?

2 Answers  

If one d.g. is unable to take full load of system, then second d.g. will take care of partly Load.for this condition RPM of both DG set should be equal.By using Synchronization panel RPM of dg sets are match, is it true?

1 Answers  

Dear Respected sir how to test ABB REX521 protection relay by relay tester.

0 Answers  

what is the difference between synchronous & asynchronous generators

1 Answers   Emco,

How to select the different contactors ( starter combination) for different AC motors? what about fuse cappacity 4 different motors too?

2 Answers   Equate,

how the characterstics of control valve being done

0 Answers  

how will i find Transformer rating if supply voltage is 11k.v and how will i find incomer if transformer rating is 12MVA

3 Answers  

difference b/w semiconductor and insulator

5 Answers  

please write motor, transformer, Generator setting, fault level calculation of Tr.etc

0 Answers  

america 60hz electric supply is used; but india it is 50hz; why? and if we use 60 hz supply what changeg has to be done or all the equipment has to be thrown which has rating of 50hz frequincy

1 Answers