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BrianG · 04.22.2009, 06:04 PM

A circuit breaker has several disadvantages:

- They operate too slow. You could have a fatal problem happen before the CB has a chance to respond.

- They are large/heavy. The negative on this should be apparent.

- They introduce resistance in the circuit.

- Would be difficult to size it right. You want it to allow the high current surges that the motor will legitimately pull, yet blow if "bad" current is pulled. How is it to know when the current pulled is "ok" or a sign of a problem?

- CC has integrated in thermal shutdown, which is probably the easiest/best way to implement catastrophic shutdown. Trouble is, it sometimes doesn't react fast enough.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	04.22.2009, 06:04 PM A circuit breaker has several disadvantages: - They operate too slow. You could have a fatal problem happen before the CB has a chance to respond. - They are large/heavy. The negative on this should be apparent. - They introduce resistance in the circuit. - Would be difficult to size it right. You want it to allow the high current surges that the motor will legitimately pull, yet blow if "bad" current is pulled. How is it to know when the current pulled is "ok" or a sign of a problem? - CC has integrated in thermal shutdown, which is probably the easiest/best way to implement catastrophic shutdown. Trouble is, it sometimes doesn't react fast enough.