Hi
Yesterday in our substation incoming voltage in our feeder (which is 6 kV) cut off for about 4 sec but the switch-gear are close .so I inspected upsteam 20 kV switch-gear and saw that one of our differential protection relay on a 20kV switch-gear operated but the 20 kV switchgear are closed!
How is it possible ?
Is it possible that a recloser installed on our 20 kV feeder?
Yesterday in our substation incoming voltage in our feeder (which is 6 kV) cut off for about 4 sec but the switch-gear are close .so I inspected upsteam 20 kV switch-gear and saw that one of our differential protection relay on a 20kV switch-gear operated but the 20 kV switchgear are closed!
How is it possible ?
Is it possible that a recloser installed on our 20 kV feeder?
