say we have a 2400V to 480/277V dry type delta-wye transformer. The high side is protected by 80A cutout fuses, and the low side goes directly to a distribution breaker panel (600A main breaker) for a whole crap-ton of heaters.
One day a single high side fuse blows. Upon arriving at the scene you see that not one low side breaker has tripped and the transformer visually seems ok.
After removing all energy sources from the transformer, what types of testing should be done?
One day a single high side fuse blows. Upon arriving at the scene you see that not one low side breaker has tripped and the transformer visually seems ok.
After removing all energy sources from the transformer, what types of testing should be done?