4160 vac, 2000A switchgear shunt current testing
4160 vac, 2000A switchgear shunt current testing
(OP)
What is the difference between full load shunt current testing and current injection testing? Is one method more suited for a given situation than the other? Do they both accomplish the same thing? I could use a nice overview if anyone can help. Thanks.





RE: 4160 vac, 2000A switchgear shunt current testing
RE: 4160 vac, 2000A switchgear shunt current testing
Breakers at 600V and below generally have all the protective devices contained on the breaker itself. The most thorough test of those devices is to inject primary current equivalent to what actually flows through the breaker during an overload or fault (except that the test current is driven by a much lower voltage level than the "real life" operating voltage).
RE: 4160 vac, 2000A switchgear shunt current testing
RE: 4160 vac, 2000A switchgear shunt current testing
Consider asking the originator of the work request to define the terms, and cite national-consensus electrical standards that reference them.