TAKEN OUT OF BRAND NEW CCU’s Never powered up. This is a Hager CD285U 100A, 2-Pole, 30mA Type A RCCB. It is a Residual Current Circuit Breaker designed to protect against electrical faults, specifically detecting current imbalances to prevent electric shock or fire hazards. With a 100A rating and Type A sensitivity, it is suitable for a range of electrical installations, ensuring safety by quickly disconnecting the power supply in case of a fault. This Hager RCCB is a reliable choice for ensuring electrical safety in various industrial and commercial settings.