NEC_help
Member
- Location
- Oakland. Calif
Or is this a passive device. allowing the full feeder and OCD current to be used. (600A 3P fused fed by dual 350 mcm feeders)..
If this is a CT used for metering it may be a problem, the POCO may have something to say about it.
If it is just for control and data collection, probably not an issue as long as the actual current stays below 400 Amps.
CT's are rated in ratio...i.e 400:5 and also TRF (Thermal Rating Factor). If the TRF is 2.0, the CT can handle 400 X 2 = 800A continuous without overheating. If it has TRF 4.0, it can handle 1600A.