jason.durby
Member
- Location
- Tempe, Arizona
- Occupation
- Electrical Superintendent
Hey guys, this is my first post.
Question: I have a 1500 kVA delta (HV)-wye (LV) transformer and the neutral is high resistance grounded. The local utility is on the primary side of the transformer. Recently, during a rain/lightning event, the utility had a phase to phase fault on their distribution line. The fault lasted half a second. During this event, a breaker that was downstream of the transformer tripped on short time protection.
During a phase to phase fault on the primary side of this transformer, would I have seen any/enough fault current on the secondary side of this transformer to trip any of my breakers? Would lightning have caused this trip?
Question: I have a 1500 kVA delta (HV)-wye (LV) transformer and the neutral is high resistance grounded. The local utility is on the primary side of the transformer. Recently, during a rain/lightning event, the utility had a phase to phase fault on their distribution line. The fault lasted half a second. During this event, a breaker that was downstream of the transformer tripped on short time protection.
During a phase to phase fault on the primary side of this transformer, would I have seen any/enough fault current on the secondary side of this transformer to trip any of my breakers? Would lightning have caused this trip?