CHINT · NJBK10
Product overview
CHINT NJBK10 protects AC motors against overload, phase loss and three-phase current unbalance. Button settings and a digital display support setup and fault checks; select the range around the motor current and match the overload curve to its starting duty.
Technical selection summary
| Series | NJBK10 |
|---|---|
| Current-setting ranges | 1–10, 5–50 and 20–200 A |
| Control supply | AC 220 V or AC 380 V, 50 Hz |
| Indication | Digital display and indicator lights |
| Output | One changeover contact |
| Manufacturer enclosure-protection reference | The CHINT NJBK10 catalogue lists IP20 as enclosure protection class (where applicable) for the NJBK10-10, NJBK10-50 and NJBK10-200 in its technical table. Match the complete model and installed enclosure arrangement |
| Overload operating-principle reference | The manufacturer describes an inverse-time overload function that calculates motor thermal accumulation from overload current and operates the contactor when the thermal threshold is reached. Motor-current sensing, protection calculation and output contacts are separate functions |
Typical applications
- Motor starter panels
- Pump and fan protection
- Machine motor control
