electricpete
Electrical
- May 4, 2001
- 16,774
Let's say I test a molded case circuit breaker instantaneous trip two ways:
1 - apply current to phase A and check current at which trip occurs. Repeat for B and C. Record the lowest of the three as the "trip point".
2 - Wire thee phases in series and apply test current and record trip point.
Is there any reason we would expect method 2 to give lower trip point then method 1?
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1 - apply current to phase A and check current at which trip occurs. Repeat for B and C. Record the lowest of the three as the "trip point".
2 - Wire thee phases in series and apply test current and record trip point.
Is there any reason we would expect method 2 to give lower trip point then method 1?
=====================================
Eng-tips forums: The best place on the web for engineering discussions.