ron
Senior Member
- Location
- New York, 40.7514,-73.9925
Designing a new service entry in NYC. The utility company (Con Ed) refuses to give valid fault current available values for the primary of the service transformers, and states that an infinite primary calculation should be used.
(6) 2500kVA, secondary voltage=480V utility transformers in parallel.
Even at a relatively high impedance, the infinite primary calculation results in >200kAIC available at the multiple service switches.
I thought I may have seen certain fuses rated at 300kAIC, but never a switch to hold them rated that high.
Anyone know of service rated switches, 4000A, that are >200kAIC?
I really would prefer switchgear breakers for this application, but I can't find any of them >200kAIC either.
(6) 2500kVA, secondary voltage=480V utility transformers in parallel.
Even at a relatively high impedance, the infinite primary calculation results in >200kAIC available at the multiple service switches.
I thought I may have seen certain fuses rated at 300kAIC, but never a switch to hold them rated that high.
Anyone know of service rated switches, 4000A, that are >200kAIC?
I really would prefer switchgear breakers for this application, but I can't find any of them >200kAIC either.