A
I am installing a disconnect switch between the wye connection of a synchronous generator and neutral grounding equipment (i.e. transformer with resistor in the secondary). The purpose of the switch is for isolation the neutral grounding equipment only (when maintenance or testing is needed).
The switch will be rated for 600 A continuous current (even though the line-ground fault will only be ~30 A), and for 240 V line-to-line.
Am I supposed to specify additional ratings such as:
- load making current
- fault making current
- BIL
I don't think these are necessary because this switch is for the neutral of a generator. If I am wrong, then why are these necessary? And how do I choose these parameters?
Also, how does one know what the maximum amount of current that will flow through the neutral will be in any given scenario? Is a single line to ground fault the worst case? What about sever phase imbalancE?
Thanks,
AJ
The switch will be rated for 600 A continuous current (even though the line-ground fault will only be ~30 A), and for 240 V line-to-line.
Am I supposed to specify additional ratings such as:
- load making current
- fault making current
- BIL
I don't think these are necessary because this switch is for the neutral of a generator. If I am wrong, then why are these necessary? And how do I choose these parameters?
Also, how does one know what the maximum amount of current that will flow through the neutral will be in any given scenario? Is a single line to ground fault the worst case? What about sever phase imbalancE?
Thanks,
AJ