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 black out?,what is brown out?

1 Answers  

why we need to us lenz's law for synchornous motor

0 Answers   Tata Elxsi,

TYPES OF TEMPERING OF ENERGY METER

1 Answers  

What is the difference between Earth Fault protection & Neutral Protection

1 Answers  

practicalLY what is impedence ...?

2 Answers  

why it is mentioned as 8/10 mva transformer why not directly 8mva or 10mva transformer. please explain me the full detailed reason.

4 Answers   Qatar Gas,

how can we know the size of cable cross-section from current rating ?

3 Answers  

what is XLPE type cable

8 Answers   Areva,

if ELCB and RCCB connected in series,what wiil be the result

2 Answers   BEC,

how to select the automotive wire size by mathematical calculation. for xenon headlamp with ballast. the ballast given data voltage 10-17v,current permenant 6amp, run up phase is 15amp, peak at swicth on max 400micro sec is 40amp.the sum of cable resistance is 150mohm.please provide referenc document if any for relating the peak at switch on current,time & wire wire size

0 Answers   Tyco,

how many types of colling system it transformers?

8 Answers   ONGC,

What is Phase to Phase clearance for 800V System Operating Voltage as per IEC61439

0 Answers