The AFDD9RL-63 series Arc Fault Detection Device are assembled by residual current circuit breakers (RCBO) and arc detection modules. The AFDD9RL-63 Arc Fault Detection Device possess the functions of short-circuit protection, overload protection, residual current protection and arc-fault protection. They are suitable for being installed in branch circuits and can quickly cut off the circuits to play a protective role when over current, short-circuit, leakage or arc-fault occurs in the branch circuits.
The AFDD9NL-40 series Arc Fault Detection Device are assembled from 18mm – wide double – pole leakage circuit breakers (RCBO) and arc – detection modules. The products have functions of short – circuit protection, over – current protection, over – voltage protection, leakage protection, and arc – fault protection.
The AFDD9NL-40 series Arc Fault Detection Device meet the performance requirements of the standard IEC62606 – 2013. The AFDD9NL-40 series is designed in particular for UK market.
AFD9-63 , a three phase four wire Arc Fault Detection Device (AFDD), designed to reduce the risk of electric fire, can effectively detects electric arc faults, disconnects the affected circuit and offers complete protection in residential,non-residential building, energy sources, industry and infrastrutures. Installation of AFDD is strongly recommended in location with sleeping accomodations, place with fire risks due to big quantity flammable materials, place with combustible building materials, place with irreplaceable goods and beyond.
The AFDD9-63 three – phase four – wire Arc Fault Detection Device is assembled from a miniature circuit breaker(MCB) and an arc – detection module. The AFDD9-63 Arc Fault Detection Device has functions of short – circuit protection, over – current protection, and arc – fault protection. It can simultaneously detect the A – phase, B – phase, and C – phase fault arcs in three – phase circuits, and can also detect the fault arcs between phases. When the Arc Fault Detection Device detects an arc fault in the circuit, it will immediately cut off the power supply to play a protective role.
The AFDD9LE-63Y series Arc Fault Detection Device are assembled by residual current circuit breakers (RCBO) and arc detection modules.The AFDD9LE-63Y Arc Fault Detection Device possess the functions of short-circuit protection, overload protection, residual current protection and arc-fault protection. They are suitable for being installed in branch circuits and can quickly cut off the circuits to play a protective role when overcurrent, short-circuit, leakage or arc-fault occurs in the branch circuits.
General
AFDD (Arc Fault Detection Devices)isa new type of electrical fireprotectiondevice,which can avoid thefire caused byshort circuit,wire aging,heavyload,poorcontactelectrical product failure and so on.
An Arc Fault Detection Device (AFDD) monitors electrical waveforms to identify hazardous arc faults and disconnect the affected circuit before excessive heat can develop into an electrical fire.
CNC Electric offers standalone AFDD, AFDD+MCB, AFDD+RCBO and AFDD+Isolator solutions for single-phase and three-phase distribution systems. Different configurations combine arc-fault detection with overcurrent, short-circuit, residual-current or isolation functions.
Detects hazardous arc characteristics caused by damaged cables, loose connections, ageing insulation or broken conductors.
Available as standalone AFDD, AFDD+MCB, AFDD+RCBO and AFDD+Isolator products.
Product options are available for single-phase branch circuits and three-phase four-wire distribution systems.
AFDD products are designed for IEC-based installations, with the applicable standard depending on the product configuration.
AFDD refers specifically to the arc-fault detection function. Other protective functions depend on whether the AFDD is combined with an MCB, RCBO or isolating device.
| Configuration | Arc-Fault Protection | Overload Protection | Short-Circuit Protection | Residual-Current Protection |
|---|---|---|---|---|
| Standalone AFDD | Included | External device required | External device required | External device required |
| AFDD+MCB | Included | Included | Included | Not integrated |
| AFDD+RCBO | Included | Included | Included | Included |
| AFDD+Isolator | Included | External device required | External device required | External device required |
Selection note: Do not assume that every AFDD provides overload, short-circuit or leakage protection. Always check the complete product configuration and technical documentation.
CNC provides different AFDD structures for branch-circuit protection, compact consumer units and three-phase distribution systems.
| Model | Configuration | Main Protection Functions | Key Feature | Typical Application |
|---|---|---|---|---|
| AFDD Fault Arc Protector | Standalone AFDD | Arc-fault detection | Multiple selectable working modes for different electrical environments | Arc-fault protection coordinated with separate circuit-protection devices |
| AFDD9RL-63 | 1P+N AFDD+RCBO | Arc fault, overload, short circuit and residual current | 6–63 A range with LED operating and fault indication | Residential and commercial branch circuits |
| AFDD9LE-63Y | AFDD+RCBO | Arc fault, overload, short circuit and residual current | Integrated multi-function branch-circuit protection | Single-phase final distribution circuits |
| AFDD9NL-40 | 1P+N AFDD+RCBO | Arc fault, overcurrent, short circuit, residual current and overvoltage | Compact 18 mm structure designed particularly for UK applications | Space-limited consumer units and final circuits |
| AFDD9-63 | Three-phase four-wire AFDD+MCB | Arc fault, overcurrent and short circuit | Detects arc faults in individual phases and between phases | Three-phase distribution and final circuits |
| AFD9-63 | Three-phase four-wire AFDD+Isolator | Arc-fault detection and circuit disconnection | Three-phase arc-fault monitoring with isolation function | Systems using separately coordinated overcurrent and leakage protection |
AFDDs are particularly valuable in locations where an undetected electrical arc could create a serious fire risk, threaten occupants or damage valuable property.
Actual AFDD installation requirements depend on national wiring regulations, building use, fire-risk assessment and project specifications.
Begin with the circuit type and required protection functions, then verify the electrical ratings, installation space and applicable certification.
| Circuit Requirement | Recommended Configuration | CNC Product Option |
|---|---|---|
| Arc-fault detection coordinated with separate protection | Standalone AFDD | AFDD Fault Arc Protector |
| Arc fault, overload and short-circuit protection | AFDD+MCB | AFDD9-63 |
| Arc fault, overload, short circuit and leakage protection | AFDD+RCBO | AFDD9RL-63 or AFDD9LE-63Y |
| Compact 1P+N protection with overvoltage function | Slim AFDD+RCBO | AFDD9NL-40 |
| Three-phase arc-fault and overcurrent protection | Three-phase AFDD+MCB | AFDD9-63 |
| Three-phase arc-fault detection with circuit isolation | AFDD+Isolator | AFD9-63 |
Before ordering, confirm the rated voltage, rated current, number of poles, breaking capacity, trip curve, residual-current sensitivity, installation width and required product standards.
An Arc Fault Detection Device (AFDD) continuously analyzes electrical waveforms to identify hazardous arc faults. When a dangerous arc is detected, it disconnects the affected circuit to help reduce the risk of electrical fires.
An AFDD can detect hazardous series and parallel arc faults caused by damaged cables, loose terminals, broken conductors, deteriorated insulation or poor electrical connections. Detection capability depends on the specific product design.
An AFDD detects dangerous arc faults, while an MCB protects against overloads and short circuits. An RCBO additionally provides residual-current protection. An integrated AFDD+RCBO combines these functions in one device.
No. A standalone AFDD mainly provides arc-fault detection. Overload and short-circuit protection require an AFDD+MCB or AFDD+RCBO, while residual-current protection is included only in an AFDD+RCBO configuration.
AFDDs are commonly installed in homes, apartments, hotels, schools, hospitals, offices, warehouses and buildings containing combustible materials or valuable assets. Local wiring regulations and project requirements should determine whether AFDD protection is required.
Confirm the circuit phase, rated voltage, rated current, number of poles, breaking capacity, trip curve and required protection functions. Also check whether residual-current protection, overvoltage protection or a compact installation width is required.