RCCB for group incomer duty
The Schneider Electric A9KR13440S is a 4-pole residual current circuit breaker (RCCB) from the Acti9 ID K range, rated 40 A with 30 mA earth-leakage sensitivity. The unit is voltage-independent, so the trip mechanism operates regardless of the supply voltage, which is a reliability advantage on circuits where voltage may sag during a fault. The breaking and making capacity is rated at Idm 500 A / Im 500 A. This positions it as a group incomer or sub-distribution RCCB for three-phase, 4-wire systems in residential, commercial, or light industrial panels.
Neutral is on the left. The IP20 rating suits enclosed panel installation; the modular enclosure achieves IP40 within the panel.
