Topic: Circuit Breaker Cross Reference
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Answers to Common Questions
What is ocr efr uvr referred to in air blast circuit breaker?
ocr-over current relay(senses the over current in the circuits) efr-earth fault relay uvr-under voltage relay Read More »
Source: http://wiki.answers.com/Q/What_is_ocr_efr_uvr_referred_to_in_air_...
What does IFA stand for when refering to a circuit breaker?
I am not sure but I would say Interruptable Fault Arrester. So that if some one would drop a hair dryer in water the breaker would open an cut off the electricity Read More »
Source: http://answers.yahoo.com/question/index?qid=20080204062518AA0Frti
What does a zero-crossing turn-on circuit refer to?
Zero-crossing turn-on and turn-off refer to the point on the AC wave form when the voltage is zero. It is at this point that an AC SSR will turn on or off. When the AC circuit voltage is at zero, no current is flowing. This makes it much ea... Read More »
Source: http://www.epanorama.net/documents/ssr/general.html
More Common Questions
Answers to Other Common Questions
Verify Interrupting Capacity.
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Source: http://www.clrwtr.com/ABB-Breaker-FAQs.htm
