Answer / g.ravikanth

Its an under voltage relay which will breaks the circuit.
when voltage goes under the rated voltage, it will be
physically made of an under volt coil connected to relay

Answer / rajendra

UV IS Under voltage realease type relay,
uv is installed in breaker and it is designed so that when
the supply of its coil is interupted it opens the breaker.
when you give supply then only you can close the breaker.
it is installed manily for interlocking.
we can use them in almost all type of onload ckt breaker
like-- MCCB,ACB,VCB,SF6 Etc...


if their is any mistake in this answer pls post it,i am diploma holder and working in panel manufacturing co--
Rajendra sawant, miraj...maharashtra.

Answer / saleem

UV= Under voltage Coil and this also one type of relay.

In breakars it will sence and give comond to breakar.
I think if the voltage is less than +/-440V or rated
voltage passing through the breakar it will sence.

Mr.Ravikanth as per my knowledgeall the relays will sence
the foult and give comond to breakar for operation.

Answer / vijay

first Relay it will Sence of uv thane relay give comand in
vcb so inst vcb trip

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