solar2021
New User
- Location
- Boston, MA
- Occupation
- Engineer
I am currently trying to procure a CT cabinet for a building service meter relocation. The building is currently serviced by a 750kVA 3P 12.74kV primary-480V secondary transformer that feeds into a 1600A switchgear. Based on my calculations the maximum full load secondary current of this transformer is around 900A. We will be installing the CT cabinet in between the transformer and building switchgear.
In my past experience, we have always sized the rating of the meter/CT cab to the maximum continuous rating of the service. For example for a 400A service, you can install a Class 320 meter socket since the maximum continuous current of the service is under 320 amps. Would a 1200A rated CT cabinet work in our case or do I need to size the CT Cab to match the service rating of the building of 1600A?
In my past experience, we have always sized the rating of the meter/CT cab to the maximum continuous rating of the service. For example for a 400A service, you can install a Class 320 meter socket since the maximum continuous current of the service is under 320 amps. Would a 1200A rated CT cabinet work in our case or do I need to size the CT Cab to match the service rating of the building of 1600A?