Overview
The ARB6 series arc protection device integrates multiple functions such as protection, measurement, monitoring, control, communication, fault recording, and event recording.
It monitors arc signals, protection current, or voltage in real time, providing arc protection for 0.4kV~35kV medium and low voltage distribution systems.
The device adopts an integrated hardware design, incorporating power module, CPU module, arc acquisition module, current/voltage acquisition module, I/O module, and communication module.
Specialized protection algorithms ensure flexible implementation, strong anti-interference, and high reliability. It is widely used in industries such as power, water conservancy, transportation, industry, mining, new energy, ships, and buildings.
Highlight
High-Performance Hardware
- 550MHz CPU
- 16-bit ADC, 48 samp/cycle
- 512KB Flash + 4MB NorFlash
- 512KB SRAM + parallel proc
Comprehensive Protection
- Arc single criterion
- Arc+current dual criterion
- Arc+voltage dual criterion
- Failure protection
- CT disconnection monitor
- Non-electric protection
- Device self-test
Rich Interfaces
- 12 current + 3 voltage ch
- Up to 30 arc sensors
- 22 DI + 16 DO (4 fast)
- 2 RS485 + 3 Ethernet (opt)
- USB + GPS sync
High Reliability
- EMC level IV certified
- Temp -10℃~+55℃
- Flame retardant HB
- Real-time self-test
- Fault recording (16 records)
- Fast trip ≤3.8ms
Function
| Arc Protection | Three criteria: arc only, arc+current, arc+zero-sequence voltage. Configurable delay and mapping to trip relays. |
| Arc Monitoring & Fault Location | Real-time light intensity monitoring, records intensity and sensor ID for fault point location. |
| Sensor & Fiber Link Self-Test | Continuous monitoring of arc sensor and fiber link; alarm on failure. |
| Failure Protection | Triggers if associated arc protection operates and current remains above threshold after delay. |
| CT Disconnection Monitoring | Detects open CT circuits with configurable current thresholds and delay. |
| Non-Electric Protection | External input can trigger protection with configurable delay and output mapping. |
| Device Self-Test | Internal fault or power loss triggers alarm with dedicated output. |
| Maintenance Lock | Locks tripping or communication via external input during maintenance. |
| Fault Recording | Up to 16 records, each with 4 segments (pre-fault 2 cycles, post-fault 10 cycles). |
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Specification
| Parameter | Value |
| Power Supply | AC/DC 110V, 220V; DC 48V, 24V ( tolerance ±20%) |
| Rated Current (In) | 5A / 1A AC |
| Rated Voltage (Un) | 100V / 100/√3V AC |
| Frequency | 50Hz / 60Hz (40~70Hz) |
| Current Measurement Range | 0.04In ~ 20In |
| Voltage Measurement Range | 0.1V ~ 120V |
| Accuracy | Current/Voltage: ±1% |
| Arc Protection Trip Time | Single criterion: ≤3.8ms (2x threshold) Dual criterion: ≤7.8ms (2x threshold & 2x current set) |
| Digital Inputs | 5 (standard) / 22 (optional); AC/DC 220V, 110V, 48V, 24V |
| Digital Outputs | 16 (14 NO + 2 NC); 4 fast outputs (≤3.8ms) |
| Communication | 2×RS485 (Modbus, IEC103), 3×Ethernet (opt), USB, IRIG-B |
| Arc Sensor Inputs | Up to 30 (depending on model) |
| Operating Temperature | -10℃ ~ +55℃ |
| Storage Temperature | -25℃ ~ +70℃ |
| Relative Humidity | 5% ~ 95% (non-condensing) |
| Altitude | ≤2500m |
| Protection Grade | IP40 (front panel) |
| Insulation Resistance | >100MΩ @500Vdc |
| Dielectric Strength | 2kV AC, 1min |
| EMC Compliance | Level IV (fast transient, surge, ESD, magnetic field) |
| Flame Retardant | HB level (GB/T 5169.16) |
| Dimensions (W×H×D) | 260mm × 160mm × 140mm (panel cutout) |
| Weight | Approx. 3.5kg |
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FAQ
The device supports AC/DC 110V, 220V, and DC 48V, 24V with ±20% tolerance.
Depending on the model: ARB6-A6 supports 6, ARB6-A12 supports 12, ARB6-A18 supports 18, ARB6-A24 supports 24, and ARB6-A30 supports 30.
Single criterion ≤3.8ms, dual criterion ≤7.8ms (at 2x threshold, electromagnetic relay output).
Enter the “Para.” and “Soft Strap” menus via the front panel, input password (default 0008) to modify. Remote setting via communication is also supported.
Modbus-RTU, IEC60870-5-103, IEC101 (via RS485), and TCP Modbus, TCP IEC103 (via Ethernet).
Panel cutout is 260mm × 160mm, flush mounting.
Summary
The ARB6 series arc protection device is an intelligent unit integrating protection, measurement, control, and communication, designed for 0.4kV~35kV medium and low voltage distribution systems. Its high-performance hardware platform ensures fast and reliable arc detection, with millisecond trip times to effectively limit fault expansion. Multiple protection criteria (arc, current, voltage) flexibly adapt to different grounding methods, enhancing selectivity. Rich interfaces (up to 30 arc sensors, 22 DI, 16 DO) meet complex switchgear monitoring needs. The device features comprehensive self-test and fault recording capabilities, supports multiple communication protocols, and is easy to integrate into existing monitoring systems. With stringent EMC certification and wide temperature operation, the ARB6 series is suitable for harsh environments in power, industry, and renewables, providing a complete arc protection solution for distribution systems.
