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NJBK7 Motor Protection Relay
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Low Voltage IEC Industrial Control NJBK7 Motor Protection Relay
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Industrial Control
NJBK7 Motor Protection Relay
NJBK7 Motor Protection Relay

NJBK7 Motor Protection Relay

The CHINT NJBK7 Motor Protection Relay provides intelligent protection and real-time monitoring for three-phase AC motors up to 800A. It safeguards motors against overload, phase loss, unbalance, grounding faults, blocking, undercurrent, and overtemperature conditions. With RS485 Modbus communication, 4–20mA analog output, and multiple current ranges, the NJBK7 offers advanced reliability, flexible control, and easy integration into automated systems for industrial motor protection.

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Product Information

Name
Size
Release time
Operate
NJBK7-Protection Relays-Catalog.pdf
691.07KB
2025-03-13
Download
Name
Size
Release time
Operate
2111-NJBK7-Motor Protector-Manual.pdf
3.39MB
2025-03-13
Download

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FAQs

 

What does the NJBK7 Motor Protection Relay do?

It provides comprehensive protection and monitoring for AC motors by detecting overloads, unbalance, phase loss, or grounding faults, ensuring safe and efficient motor operation.

 

What communication options does it offer?

It includes an RS485 Modbus RTU interface for remote monitoring and control, plus an optional 4–20 mA analog output for current feedback.

 

What current range does the NJBK7 support?

The relay supports a wide range from 1 A to 800 A, covering motors from 0.5 kW to 400 kW.

 

How fast does it react to faults?

It provides rapid protection — phase loss within 3 s, grounding faults within 1 s, and temperature faults within 1 s.

 

Is it suitable for industrial environments?

Yes. The NJBK7 meets IEC/EN 60947-4-1 standards, operates in Class B electromagnetic environments, and supports non-stop or 8-hour duty cycles.

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