Humble2000
Electrical
- Nov 17, 2005
- 132
In a 3 wire grounded system, if the main breaker has a ground fault function, the CT's common will need to be connected to ground terminal of the relay.
I know that in this case the sum of three currents will pass to ground and create a signal to activate the relay.
How the setting and coordination would be done in this case?
The other question is if the arc fault current is calculated from %38 of 3phase bolted current or LG bolted current?
Thanks
I know that in this case the sum of three currents will pass to ground and create a signal to activate the relay.
How the setting and coordination would be done in this case?
The other question is if the arc fault current is calculated from %38 of 3phase bolted current or LG bolted current?
Thanks