| Model: | OBS7-6-VA/3P+N |
| Voltage range: | 80-300V |
| Current : | 63A |
| Model: | OBS7-6-VA/3P+N |
| Voltage range: | 80-300V |
| Supply terminals | 80A |
| Model: | OBS7-6-VA/3P+N |
| Voltage range: | 80-300V |
| Supply terminals | 100A |
OBCH OBS7-6/3P+N Three-Phase Voltage & Current Protector – 63A/80A/100A DIN-Rail Relay
The OBCH OBS7-6/3P+N is a DIN-rail mounted three-phase voltage and current protector available in 63A, 80A, and 100A heavy-duty ratings. This 3P+N unit supports a wide operating voltage of 80–300V, making it ideal for unstable three-phase power grids in Southeast Asia, Africa, and the Middle East.
Three independent digital screens display real-time voltage and current for L1, L2, and L3 phases simultaneously. Front-panel buttons allow users to adjust over-voltage, under-voltage, and delay reclosing thresholds to match local power standards.
This auto-reclosing voltage protector delivers 3-in-1 protection against over-voltage, under-voltage, and overload. It automatically restores power when grid voltage normalizes – no manual reset required. The complete 3P+N circuit design also protects three-phase equipment from damage caused by phase imbalance or broken neutral line.
Key Features:
Triple digital display – Independent screens show real-time voltage and current for all three phases.
80–300V wide voltage range – Delivers stable protection in fluctuating three-phase grids worldwide.
63A / 80A / 100A ratings – Handles heavy industrial and commercial loads.
Adjustable parameters – Front buttons for customized over-voltage, under-voltage, and reclosure delay settings.
Auto-reclosing function – Power restores automatically when voltage stabilizes – no manual intervention.
3P+N complete circuit – Protects against phase imbalance and broken neutral line damage.
DIN-rail mounting – Modular snap-on design for quick installation.
3-in-1 protection – Integrated over-voltage, under-voltage, and overload limiting.
| Voltage range | 80-300V |
| Current | 63A |
| Supply terminals | N, L |
| Rated supply voltage | AC230V |
| Operation voltage range | AC120V-300v |
| Rated frequency | 50/60Hz |
| Hysteresis | Overvoltage and asymmetry: 5V Under voltage: 5V |
| Asymmetry tip delay | 10s |
| Voltagemeasurementaccuracy | <1% (over the whole range) |
| Rated insulation voltage | 450V |
| Output contact | 1NO |
| Electrical life | 10⁵ |
| Mechanical life | 10⁵ |
| Protection degree | Ip20 |
| Pollution degree | 3 |
| Altitude | <2000m |
| Operating temperature | -5℃-40℃ |
| Humidityly | ≤50% at 40℃ (without condensation) |
| Storage temperaturee | -25℃-55℃ |
We provide customised solutions for professional circuit protection.
Jul 06,2026
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