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Arc Fault Detection Device


MTAF5 Arc Fault Detection RCBO device has the function of short circuit protection, overload protection, arc fault protection, and earth-leakage protection.

MTAF1-32 Arc fault Detection Device consists of a small circuit breaker, tripping mechanism, and arc detection module.


MTAF5 Arc-fault Detection Device (AFDD) Functions


Arc Fault Protection


Overload Protection


Short-circuit Protection


Earth-leakage Protection


Main Technical Parameters of MTAF5

Electrical Features

Mode Electronic
Type A
Rated Current In 6, 10, 16, 20, 25, 32, 40A
Poles 1P+N
Rated Voltage Ue 230V~
Insulation Voltage Ui 400V
Rated Frequency 50Hz
Rated Residual Operating Current (I△n) 30mA
Break Time Under (I△n) ≤0.1s
Rated Breaking Capacity 6,000A
Energy Limiting Class 3
Rated Impulse with Stand Voltage (1.5/50) Uimp 4,000A
Dielectric Test Voltage at ind.Freq.for 1min 2kV
Pollution Degree 2
Thermo-magnetic Release Characteristic B

Mechnical Features

Electrical Life 4,000 Cycles
Mechanical Life 10,000 Cycles
Contact Position Indicator Yes
Protection Degree IP 40 in Sentry MCU & Enclosures
Reference Temperature for Setting of Thermal Element 30℃
Ambient Temperature (with daily aver ≤ ℃) age 35 -5℃ ~ +40℃
Storage Temperature -25℃ ~ + 55℃


Terminal Connection Type Cable / Pin-typebusbar
Tightening Torque for L&N-LOAD 2.5N㎡
Tightening Torque (N*m) 1.2N㎡
Mounting On Din rail EN60715(35mm) by means of fast clip device
Connection Power supply from button


MTAF1-32 Arc Fault Detection Device Overview


MTAF1-32 arc fault detection consists of a small circuit breaker, tripping mechanism, and arc detection module. MTAF1-32 have the function of short circuit protection, overload protection, and arc fault protection. It detects the arc fault through the chip detection program, and if it is confirmed as the fault arc, it will disconnect the power supply and provide arc fault protection. According to statistics, the proportion of total fire in electric fires is increasing year by year. In addition, seventy percent of electrical fires are caused by faulty arcs. MTAF3-32 arc fault protection device can effectively avoid fire caused by fault arcs.


MTAF1-32 AFDD Usage


MTAF1-32 AFDD are widely used in rated current 32A and the following household and similar communication circuits. arc fault protection unit of MTAF1-32 can detect and identify series arc faults, parallel arc faults, and ground arc faults. For example the old and damaged insulation layer of a line, wet air can cause arc faults phenomena. When Arc fault Detection Devices detect that there is arc faults exist, it would be automatically tripping and cut off the power supply.


Main Technical Parameters of MTAF1

Rated Working Voltage AC 230V
Rated Working Frequency 50Hz±2%
Rated Insulation Voltage 400V
Rated Impact Withstand Voltage 4kV
Rated Current 6A、10A、16A、20A、25A、32A
Number of Poles 1P+N
Type of Instantaneous Trip B, C
Short Circuit Capability 6kA


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