detect mv cable faults 3

[mhalarjani]

Hello

can anyone help me to detect fault in MV cables .

in this pic's

 

[wroggent]

 

[mhalarjani]

right

but my question how can I detect the fault when the outage happen ?

what the devices can help me ?

 

[ScottyUK]

Think about what relays would respond to an earth fault? Why would certain relays respond and not others? You won't learn if we do your homework for you.