The ABB GSH204 AC-D32/0.03 is a 4-pole, 32A, Type AC, D-curve Residual Current Circuit Breaker with Overcurrent Protection (RCBO). This specialized device is engineered for protecting three-phase four-wire circuits that supply loads with very high inrush (starting) currents. It combines complete protection against overloads, short-circuits, and earth leakage faults in one unit. The D-curve overcurrent characteristic provides a high magnetic trip threshold, making it immune to nuisance tripping from the brief but intense startup surges typical of motors, transformers, and certain lighting systems, while the 30mA Type AC RCD component ensures critical protection against electric shock.
