Arc Fault Detector

The Arc Fault Detector is designed to identify dangerous electrical arc faults in connected circuits before they develop into fire hazards. It monitors both parallel fault arcs and series fault arcs, helping building owners, installers, and electrical contractors improve fire-prevention performance in low-voltage distribution systems. When an abnormal arc condition is detected, the device can trigger local audible and visual alarms and transmit alarm information to an upper-level monitoring system, allowing early warning, fast troubleshooting, and safer maintenance response.

This product is suitable for electrical circuits with a total load capacity of 10kW or below, and the recommended protected line length should not exceed 100 meters. It is widely used in nursing homes, schools, commercial buildings, hotels, factories, warehouses, libraries, offices, residential houses, and entertainment venues. For projects that require reliable arc fault detection, building fire monitoring, and centralized alarm communication, this DIN rail mounted detector offers a practical and intelligent solution.

• Detects both series and parallel fault arcs to help reduce electrical fire risk.
• Local sound and light alarm output for fast on-site fault indication.
• RS485 communication with Modbus-RTU protocol for integration with monitoring equipment.
• LCD display shows real-time voltage, current, arc count, address, and system status.
• Adjustable overvoltage, undervoltage, overcurrent, and arc alarm parameters for flexible site configuration.
• Stores up to 5,000 recent event records for fault review and maintenance tracking.
• Passive normally open contact output for alarm linkage and external signal feedback.
• 35mm DIN rail installation for fast mounting inside distribution boxes and control panels.

The detector is recommended for circuits where hidden arc faults may create fire risk but are difficult to discover through routine inspection. Typical installation areas include public buildings, elderly care facilities, classrooms, offices, hotels, commercial stores, warehouse distribution boards, factory electrical rooms, residential branch circuits, and entertainment venues. It is also suitable for projects that need remote alarm communication, centralized monitoring, and event-based maintenance records.

The front panel includes RUN, ALARM, and COM indicators. The RUN indicator flashes during normal operation, the ALARM indicator flashes when a fault is detected, and the COM indicator flashes when RS485 communication data is active. The keyboard includes SET, plus, minus/reset, and return keys. Users can view the main screen, select system settings, configure voltage parameters, adjust current protection values, and set arc detection parameters according to the project requirements.

Factory reference settings include 260V for overvoltage protection, 160V for undervoltage protection, 32A for overcurrent protection, 3A for arc current, 5 arc counts, and adjustable delay settings. The device address can be configured from 1 to 500, and the baud rate is typically 9600. Parameter changes should be saved through the SET key after adjustment.

Installation should be completed by qualified electrical personnel. Before wiring, disconnect the upstream power supply and verify that the circuit is de-energized. Mount the detector securely on a 35mm DIN rail, connect the power input, load-side wiring, signal feedback terminals, and RS485 A/B communication terminals according to the wiring marks. Ensure all terminals are tightened properly and keep the device away from condensation, corrosive gas, strong vibration, and direct water exposure.

During operation, periodically check whether the display, indicators, buzzer, communication status, and alarm output function normally. Review event records after alarms to identify abnormal wiring, deteriorated insulation, overloaded circuits, or equipment faults. The detector is an alarm and monitoring device; it should be used together with suitable protective circuit breakers, leakage protection devices, and properly rated conductors to build a complete electrical safety system.

For project selection or bulk purchasing, please provide the required quantity, circuit voltage, current range, monitored load type, communication requirements, and installation environment. Our team can help confirm the suitable Arc Fault Detector configuration and provide technical data, quotation support, and delivery information for your fire-prevention and electrical monitoring project.