MCCB for line protection with UVR and full aux switch set
It is a 3-pole unit designed specifically for line protection — feeder or main breaker duty in a distribution panel, not motor protection. Breaking capacity scales from 187 kA at 240 V down to 3 kA at 690 V, which gives selectivity headroom at common low-voltage levels while still clearing faults on 690 V systems. The factory-fit auxiliary switch complement includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch, plus an undervoltage release (UVR) — a complete signalling and shunt-trip package that eliminates field-fitting loose accessories.
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a compact 3-pole footprint that fits standard SENTRON 3VA panel cutouts and busbar centres.
Thermal and environmental limits
Maximum power loss is 16 W at rated load — a useful figure for panel heat-budget calculations. The breaker includes a trip indicator for visual fault confirmation.
