The 410D Auto-Charged Capacitor Trip Device is a micro-controller based high speed capacitor type circuit breaker tripping unit. It differs from standard CTD's in that has a separate charging circuit and is isolated from the mains. This device is primarily for use with circuit breakers which require some form of AC power for their closing operation. i.e. circuit breakers having either a stored energy closing mechanism with an AC-operated release coil, or an AC solenoid-operated closing mechanism. The 410D-40J has a stored capacity of 40.4J at 380 V and can maintain a full charge for 48 hours.

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