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Digitally adjustable 3-phase over& under-voltage + phase sequence control relay, suitable for 3-phase 380V systems, used for grid anomaly protection of industrial equipment.
- Core Protection & Adjustment Parameters
| Item | Specification | Description |
| Overvoltage threshold | 400–460V AC (adjustable) | Digital adjustment, accuracy ±1V |
| Undervoltage threshold | 230–360V AC (adjustable) | Digital adjustment, accuracy ±1V |
| Phase sequence protection | Phase sequence error detection / non-phase-sequence mode switchable | Prevents motor reverse rotation and mechanical damage |
| Fault delay time | 0.1–10 seconds (adjustable) | Flexibly adapts to different load characteristics |
| Supply voltage | 3-phase AC 380V (no neutral wire required) | Wide voltage for industrial power grids |
| Operating frequency | 50/60Hz (auto-adaptive) | Compatible with global main power frequencies |
- Electrical & Mechanical Characteristics
| Item | Specification | Description |
| Contact rating | 5A/250V AC (resistive load) | Reliable driving for control circuits |
| Contact type | 1 NO + 1 NC | Standard control contact configuration |
| Protection degree | IP20 | Must be installed in a control cabinet |
| Certifications | CE, UL, CSA | International safety certifications |
| Power consumption | Low power design | Energy-saving, low system load |
| Insulation | Complies with industrial electrical safety standards | Ensures electrical isolation safety |
- Environmental & Installation Parameters
| Item | Specification | Description |
| Operating temperature | -10°C to +55°C | Adapts to harsh industrial environments |
| Storage temperature | -25°C to +70°C | Safe range for transport and long-term storage |
| Relative humidity | 5–95% (non-condensing) | Suitable for humid industrial environments |
| Mounting | 35mm DIN rail / front panel mounting | Flexible for control cabinet layout |
| Dimensions | Compact design (subject to physical product) | Saves cabinet space |
| Weight | Lightweight design (subject to physical product) | Easy installation and layout |
- Key Features & Advantages
- Three-in-one protection: Integrates overvoltage, undervoltage and phase sequence protection.
- Digital precise adjustment: Higher accuracy (±1V) than analog type, more intuitive setting.
- Non-phase-sequence mode: Switchable via DIP switch for wider compatibility.
- No neutral wire design: Direct 3-phase power supply, simplified wiring.
- Clear fault indication: LED indicators show status and fault type clearly.
- Wide temperature operation: -10°C~+55°C for mining, metallurgy and harsh conditions.
- Typical Applications
Motors & Pumps: 3-phase asynchronous motors, compressors, water pumps, fans.
Automated lines: CNC machines, robot stations, packaging machines.
Building electrical: Central air conditioning, elevators, fire pump rooms.
Special conditions: Petrochemical auxiliary equipment, mining machinery.
- Key Matching for Selection & Replacement
- Function matching: Must include overvoltage, undervoltage and phase sequence protection.
- Parameter consistency: Overvoltage 400–460V, undervoltage 230–360V, delay 0.1–10s.
- Contacts & power: 5A/250V AC contacts, 3-phase 380V (no neutral).
- Installation compatibility: DIN rail / panel mounting, direct replacement for Siemens 3UG4632, Schneider RM22TG20 etc.
