Overload relay and operating method thereof

Details Overload relay and operating method thereof Overload relay and operating method thereof

2006-04-19

2010-06-29

Jackson, Stephen W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific circuit breaker or control structure

Reexamination Certificate

active

07746617

ABSTRACT:
An overload relay, which trips a current flow between a power source and a load, includes a trip capacitor that stores therein an electric charge to excite a trip coil so as to trip the current flow, a reset capacitor that stores therein an electric charge to excite a reset coil so as to reset the tripped current flow, an energizing unit that energizes the coils, and a capacitor-diagnosing unit that diagnoses the capacitors. The energizing unit forcibly energizes the trip coil by using the trip charge when the capacitor-diagnosing unit diagnoses that there is a degradation of a property of the trip capacitor.

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Notice of Allowance dated Mar. 27, 2009 for Korean Application 10-2007-700356.

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