Function and Usage
The NJBK1 series motor protector (hereinafter referred to as the protector) is applicable to AC 50Hz, rated insulation voltage up to 690V, and long-term or intermittent AC motors with rated operating current of 1A~400A for protection against overload, phase failure, and three-phase current imbalance.
Details Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| 4.1 Rated Control Circuit Supply Voltage of the Product | Rated Voltage | AC220V, AC380V |
| Permissible Fluctuation Range | 85%~110% |
| 4.1 Main Circuit | Rated Insulation Voltage | AC690V |
| Rated Frequency | 50Hz |
| 4.1 Main Circuit Main Parameters and Technical Performance Table | Model | NJBK1-80/5 |
| Rated Current A | 5 |
| Set Current Range A | 1-5 |
| Motor Power kW | 0.5kW-2.5kW |
| Model | NJBK1-80/10 |
| Rated Current A | 10 |
| Set Current Range A | 2-10 |
| Motor Power kW | 1kW-5kW |
| Model | NJBK1-80/30 |
| Rated Current A | 30 |
| Set Current Range A | 6-30 |
| Motor Power kW | 3kW-15kW |
| Model | NJBK1-80/80 |
| Rated Current A | 80 |
| Set Current Range A | 16-80 |
| Motor Power kW | 8kW-40kW |
| Model | NJBK1-400/200 |
| Rated Current A | 200 |
| Set Current Range A | 40-200 |
| Motor Power kW | 20kW-100kW |
| Model | NJBK1-400/400 |
| Rated Current A | 400 |
| Set Current Range A | 80-400 |
| Motor Power kW | 40kW-200kW |
| 4.2 Auxiliary Circuit | Rated Insulation Voltage | AC415V |
| Rated Frequency | 50Hz |
| 4.2 Auxiliary Circuit Main Parameters and Technical Performance Table | Usage Category | AC-15 |
| Rated Operating Voltage (V) | 240 |
| Rated Operating Current (A) | 1.5 |
| Agreed Heating Current (A) | 5 |
| Rated Operating Current (A) | 415 |
| Agreed Heating Current (A) | 0.95 |
