Protection of Transformer Primary
Protection of Transformer Primary
(OP)
I'm sorry if this comes across as too basic to ask but here goes.
Need to calculate the Full Load Amps on the primary side of a 480V-120/240V, single phase transformer being supplied by only two ungrounded conductors from a three phase system. I'm told that the FLA is the kVA/480 because the load is single phase. I thought the FLA should be kVA/(1.732x480) because the system that "sees" the load is still a three phase system with the phases 120 degrees apart? How do you calculate a "two" phase load on a three phase system?
Need to calculate the Full Load Amps on the primary side of a 480V-120/240V, single phase transformer being supplied by only two ungrounded conductors from a three phase system. I'm told that the FLA is the kVA/480 because the load is single phase. I thought the FLA should be kVA/(1.732x480) because the system that "sees" the load is still a three phase system with the phases 120 degrees apart? How do you calculate a "two" phase load on a three phase system?






RE: Protection of Transformer Primary
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.
RE: Protection of Transformer Primary
See last couple of posts in thread238-261481: 3 Phase Power Monitor.
Rafiq Bulsara
http://www.srengineersct.com
RE: Protection of Transformer Primary
RE: Protection of Transformer Primary
A = kVA/kV
RE: Protection of Transformer Primary
Rafiq Bulsara
http://www.srengineersct.com
RE: Protection of Transformer Primary
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.