Hager ARR920U Arc Fault RCBO B Curve Type A 20A 30mA

The Hager ARR920U Arc Fault RCBO is a type of circuit protection device that is used to protect electrical circuits from arc fault and ground fault conditions. An arc fault is an electrical discharge that occurs when current travels through an unintended path, often as a result of damaged insulation or other electrical failures. A ground fault is a type of electrical fault in which current flows to ground instead of returning through the normal path. The Hager ARR920U Arc Fault RCBO is designed to detect these types of faults and quickly interrupt the electrical circuit to prevent damage or injury. The RCBO has a rating of 20 amps and is designed to trip at a current of 30 milliamps. It is classified as a B curve type, which means it is suitable for use in circuits with a moderate inrush of current.