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Old 01-22-2015, 01:21 AM   #1
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Default Bridge rectifier as flywheel diode

Have a new ABB 11kv breaker where the trip coils etc go into a bridge rectifier. The 110VDC goes into the AC input, and the coil is connected across the DC output. The old breaker simply had coils directly on the 110VDC, no flywheeling diodes installed. I can't see this being an issue at all but thought it was a bit of an unusual arrangement as this is the first time I've seen a bridge used this way. Was just wondering if anyone could say more about it.

Last edited by Nuzzie; 01-22-2015 at 01:27 AM.
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