Circuit breaker size h1000 4-pole 50kA 1000A electronic setting. LSI. Circuit breaker according to DIN EN 60947-2 size h1000, with electronic setting. Thermal release, magnetic release and short-time delay to protect electrical systems and networks. Mounting on mounting plate. The three different operating states can be identified by the position of the knob (ON = top, OFF = bottom, triggered = middle position). The switches have a mechanical test button. The function of the circuit breaker can be expanded using various accessories. Including phase separators and connection lugs.