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AFDD
Select AFDD Models
Compare available models below and click a card for full specifications & wiring diagrams.
Overview — What is an AFDD?
AFDD (Arc Fault Detection Device) detects dangerous arcing signatures and disconnects the circuit to reduce electrical fire risk.
An arc fault detection device continuously analyzes current/voltage waveforms to identify patterns typical of series arc fault (loose connections, damaged conductors in series with the load) and parallel arc fault (unintended arcing between conductors). When the algorithm recognizes a hazardous signature, the AFDD trips the circuit before heat can ignite nearby combustible materials. This functionality is distinct from residual-current and overcurrent protection.
Compared with other protective devices: an RCCB reacts to earth leakage; an MCB (또는 RCBO) reacts to overload and short-circuit. AFDD specifically targets arcing events that may not produce sufficient leakage or overcurrent to trigger those devices. In many jurisdictions, AFDDs are advised or required in high fire-risk areas (consult local codes). The detection logic is aligned with the intent of IEC 62606 (series-dependent compliance).
You can deploy AFDDs as dedicated modules upstream of final circuits or select integrated AFDD+RCBO variants where available. In both cases, AFDDs complement the protection stack: AFDD + RCBO (또는 AFDD + MCB + RCCB) creates a layered defense against arc fault, leakage, overload, and short-circuit. The result is improved fire safety without compromising selectivity.
주요 기능 및 이점
Engineered arc recognition, coordinated with residual and overcurrent protection for comprehensive safety.
Series & Parallel Arc Recognition
Monitors patterns associated with frayed conductors, loose terminals, and damaged insulation; intervenes before ignition.
Integrated or Modular
Available as stand-alone AFDDs or as AFDD+RCBO combinations to save space and simplify wiring on final circuits.
Algorithm & Immunity
Detection algorithm aims to distinguish hazardous arcs from benign switching noise, improving immunity to nuisance tripping.
IEC 62606 Alignment
Designed with the intent of IEC 62606; series-dependent approvals (CE/CB/UKCA/RoHS) available by family.
DIN-rail Modular
Compact modules for 35 mm EN 60715 rails; suitable for new builds and retrofit distribution boards.
Status & Test Functions
Front indicators and test buttons support routine checks; recommended monthly testing as per local regulations.
Application-focused
Particularly valuable in bedrooms, accommodations, aging wiring, combustible storage areas, IT rooms, and critical environments.
애플리케이션 및 사용 사례
Target locations where arc ignition risk is elevated or consequences of fire are severe.
AFDD for bedrooms & accommodations
Mitigates risk from portable heaters, aging plugs, and flex leads; improves safety in hotels, dormitories, and apartments.
AFDD for aging wiring
Legacy installations with brittle insulation or corroded terminals benefit from arc-fault monitoring beyond leakage-only detection.
AFDD for combustible storage
Where materials are easily ignitable (timber, packaging, textiles), early arc detection reduces fire initiation likelihood.
AFDD for IT rooms & data centers
High equipment density and continuous loads demand enhanced protection without widespread nuisance trips.
AFDD for hospitals & public buildings
Supports risk-managed selectivity strategy; use with RCBO to localize trips to the affected circuit.
AFDD with EV / PV adjacencies
For EV charging bays and PV AC interfaces, integrate AFDD with the correct residual-current device and surge protection (AC SPD).
선택 가이드
Pick pole configuration, integration method, and compatibility for the target load environment.
- 폴 및 시스템: 단상 회로의 경우 다음을 선택합니다. AFDD 1P+N; use AFDD 2P where simultaneous disconnection is required. For three-phase distribution, deploy AFDDs on each phase path or use an AFDD solution combined with RCBO/MCB as applicable.
- Integration: 선택 AFDD + RCBO combinations to cover arc faults, leakage, and overcurrent in one line-up; or use AFDD with MCB + RCCB where series compatibility or retrofit constraints dictate.
- 호환성: If loads include power electronics (LED drivers, VFDs, UPS), confirm AFDD immunity and pair with appropriate residual-current type (AC/A/F/B) via RCBO or RCCB as required.
- Selectivity: Coordinate AFDD trip characteristics with downstream devices to ensure only the faulted branch trips; avoid shared neutrals that could confuse detection.
- 환경: In high fire-risk or mission-critical areas (bedrooms, combustible storage, hospitals, IT rooms), prioritize AFDD deployment per risk assessment and local codes.
| 매개변수 | 옵션 | 일반적인 사용 | 참고 |
|---|---|---|---|
| 폴 | 1P+N / 2P | Single-phase circuits; simultaneous disconnection when required | For 3-phase, combine AFDD with 3P/3P+N protection using RCBO 또는 MCB |
| Integration | AFDD + RCBO / AFDD + MCB + RCCB | Final circuits and retrofit boards | AFDD+RCBO saves space and simplifies wiring; modular stack is flexible for legacy panels |
| Residual-Current Type | AC / A / F / B (via RCBO/RCCB) | Mixed electronic loads, drives, EV/PV adjacencies | Follow equipment manual; Type B for smooth DC environments when specified |
| Selectivity | Time/coordination settings (series-dependent) | Critical and high-availability sites | Ensure AFDD trips the affected branch; avoid upstream blanket trips |
| Environment | Bedrooms, aging wiring, combustible storage, hospitals, IT rooms | Higher fire-risk or consequence-of-failure | Adopt AFDDs where risk or regulation justifies enhanced protection |
참고
"AFCI vs AFDD”：AFCI vs AFDD”: AFCI is the commonly used term in North America, while AFDD is the international term. Both serve a similar purpose (arc fault protection), but the naming and standard systems differ. Select according to the certification requirements of your region.
배선 및 설치
Correct wiring practices and routine testing maximize AFDD effectiveness.
Single-phase (AFDD 1P+N)
Route both line and neutral through the AFDD’s sensing path. When using AFDD + RCBO, follow terminal markings and torque values; avoid shared neutrals across circuits.
AFDD with RCBO/MCB/RCCB
Stack AFDD with RCBO for integrated protection or with MCB + RCCB in modular form. Maintain clear neutral segregation to prevent false detection.
Testing & maintenance
Use the TEST function monthly (or per local rules). Inspect terminations, re-torque if required, and replace any unit that fails functional tests or shows visible damage.
| 시나리오 | 권장 스택 | 참고 |
|---|---|---|
| Bedrooms & accommodations | AFDD + RCBO (Type A, 30 mA) | People protection (leakage) + arc-fault mitigation; localized trips on the branch circuit |
| Aging wiring retrofit | AFDD + RCBO or AFDD + MCB + RCCB | Legacy boards benefit from modular stacks; confirm enclosure space and busbar compatibility |
| Combustible storage / workshops | AFDD + RCBO, 인러시가 있는 경우 커브 C/D | Consider AC SPD upstream where surges are expected |
| IT rooms & data centers | AFDD + RCBO (Type A/F) | Improved immunity to switching noise; maintain neutral segregation |
기술 데이터(일반)
Typical envelope values for Kuangya AFDD families. Confirm the exact figures in the datasheet of the specific series.
| 매개변수 | 일반적인 값/범위 |
|---|---|
| Standards & intent | Designed in line with IEC 62606 (arc fault detection). Where integrated with overcurrent/leakage, associated product standards apply (e.g., IEC/EN 61009-1 for AFDD+RCBO variants). |
| 폴 | 1P+N and 2P for single-phase circuits; three-phase protection achieved via AFDD deployment per phase or solution combined with 3P/3P+N protection using RCBO / MCB. |
| Detection scope | Signature analysis of series arc fault 및 parallel arc fault; discrimination from benign switching events (series-dependent algorithm). |
| Residual-current pairing | Pair with appropriate residual-current device type (AC/A/F/B) via RCBO 또는 RCCB 를 사용하여 유출 위험을 해결합니다. |
| Rated operational voltage | 230–240 V~ for single-phase devices; compatibility with 400–415 V~ three-phase panels when used as part of a coordinated stack. |
| 지구력 | Electrical/mechanical endurance suitable for panel applications; exact figures per series and rating. |
| Indications & test | Status indicator and TEST function on the front cover; monthly functional test recommended. |
| 마운팅 | DIN rail 35 mm (EN 60715), modular widths for retrofit and new builds. |
| Operating conditions | Typical ambient −25 °C … +55 °C; altitude/thermal derating per datasheet; pollution degree per series. |
| Degree of protection | IP20 at terminals when correctly wired; ensure appropriate enclosure rating for the environment. |
| 조정 | Use with RCBO 또는 MCB + RCCB for full stack protection (arc + leakage + overcurrent). |
| Accessories (series-dependent) | Auxiliary contacts, locking options, shunt/undervoltage releases where available. |
| 시나리오 | 권장 스택 | 왜 |
|---|---|---|
| Bedrooms / accommodations | AFDD + RCBO (Type A, 30 mA) | Arc-fault mitigation plus people protection; localized tripping per final circuit. |
| Aging wiring retrofit | AFDD + RCBO or AFDD + MCB + RCCB | Addresses loose connections/insulation degradation while maintaining code-compliant leakage/overcurrent protection. |
| Combustible storage / workshops | AFDD + RCBO (curve C/D if inrush present) | Reduces ignition likelihood where fuel load is high; consider upstream AC SPD. |
| IT rooms & data centers | AFDD + RCBO (Type A/F) | Improved immunity to switching noise; maintain neutral segregation for correct operation. |
| Hospitals & public buildings | AFDD + RCBO | Risk-managed selectivity to avoid broad outages while enhancing fire safety. |
"AFCI vs AFDD”: AFCI is the common North-American term; AFDD is the international term. Both target arc-fault mitigation,
but naming and standard ecosystems differ. Select according to your regional certification requirements.
인증
Series-dependent approvals. Provide the target market and we will supply the exact certificate set.
Availability of specific options (e.g., integrated AFDD+RCBO, higher immunity classes, accessories) may vary with certification scope and series.
Always verify model codes and document revisions before submittals.
FAQs — AFDD
How does an AFDD differ from RCCB/RCBO and MCB?
An AFDD focuses on detecting hazardous arcing that may not create enough leakage or current to trip an RCCB 또는 MCB. When paired with an RCBO or with MCB+RCCB, you achieve a layered stack: arc-fault mitigation + leakage + overload/short-circuit protection.
What kinds of faults can AFDD detect?
AFDDs analyze waveform signatures to detect series arc fault (caused by loose terminals or damaged conductors in series) and parallel arc fault (between conductors). The embedded algorithm aims to distinguish dangerous arcs from normal switching noise.
AFDD는 어디에 가장 유용할까요?
Locations with elevated fire risk or high consequence of failure—bedrooms and accommodations, aging wiring retrofits, combustible storage areas, IT rooms/data centers, hospitals and public buildings—benefit significantly from early arc-fault intervention.
How should I select AFDD ratings and types?
Choose 1P+N or 2P for single-phase circuits; for three-phase panels, deploy AFDDs per phase or adopt a coordinated AFDD + 3P/3P+N protection arrangement. Pair with the correct residual-current type (AC/A/F/B) using RCBO 또는 RCCB as required by the load.
Does AFDD cause nuisance tripping with electronic loads?
The detection algorithm is designed to differentiate hazardous arcs from benign high-frequency noise produced by drivers, UPS, or VFDs. Proper neutral segregation, correct routing through the sensing path, and adherence to the manufacturer’s wiring guidance further reduce nuisance trips.
Is an AFDD mandatory?
Requirements are jurisdiction-specific. Some standards recommend AFDDs in particular locations or occupancies. Always check local wiring rules and certification expectations; where not mandated, a risk assessment often justifies adoption.
Do you have an AFDD wiring diagram?
Yes—wiring diagrams are provided per series and configuration (AFDD alone or AFDD + RCBO). In all cases, route both line and neutral correctly through the sensing path, avoid shared neutrals across circuits, and follow torque specifications on terminals.
