AFDD9-63 Arc Fault Detection Device（AFDD+MCB）

An AFDD breaker, or Arc Fault Detection Device, is designed to detect dangerous arc faults in electrical circuits and disconnect the power supply before the fault develops into a fire hazard. The AFDD9-63 combines arc fault detection with MCB protection to provide arc fault, overload, and short-circuit protection in one device.

Arc faults are commonly caused by damaged wires, loose connections, aging insulation, broken conductors, or poor contact between electrical components. These faults can create heat and sparks, which may increase the risk of electrical fire if not detected in time.

An AFDD continuously monitors the current waveform in the circuit. When it detects abnormal electrical arc characteristics, it trips quickly and disconnects the affected circuit. The AFDD9-63 is designed to detect arc faults in three-phase circuits and also provides over-current and short-circuit protection.

An MCB mainly protects against overloads and short circuits, while an AFDD is specifically designed to detect dangerous arc faults that conventional breakers may not identify. The AFDD9-63 integrates AFDD and MCB functions, so it can provide both arc fault protection and standard circuit protection.

Yes. AFDDs are developed to reduce the risk of electrical fires by identifying hazardous arc faults at an early stage and disconnecting the circuit before excessive heat or ignition occurs. This makes them an important solution for modern electrical fire prevention.

AFDDs are recommended in residential buildings, commercial spaces, sleeping areas, and installations where fire safety is especially important. They are also suitable for distribution systems that require additional protection against arc-related fire risks.

AFDD devices can detect dangerous arc faults such as series arc faults, parallel arc faults, and earth arc faults. The AFDD9-63 catalogue also states that it provides protection against overloads and short circuits, giving broader circuit protection in one unit.

AFDD breakers are available in multiple current ratings for different applications. According to the AFDD9-63 catalogue, available ratings include 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, and 63A, which makes the device suitable for a wide range of low-voltage distribution systems.

AFDD devices are generally designed according to recognized electrical safety standards. The AFDD9-63 complies with IEC/EN 62606 for arc fault detection devices and IEC/EN 60898-1 for miniature circuit breakers.

AFDD devices typically include a test button and LED indication for status monitoring. On the AFDD9-63, the green LED indicates normal operation, while a red LED or red flashing signal indicates an arc fault or abnormal operating condition. The test button can also be used to verify proper function.