NJBK1 Motor Protector Datasheet & Manual

NJBK1 Motor Protector

The NJBK1 Series Motor Protectors safeguard AC motors against overload, phase loss, and current unbalance. Suitable for continuous or intermittent duty motors with rated current 1A–400A and voltage up to 690V.

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FAQs

What is the main function of the NJBK1 Motor Protection Relay?

It protects three-phase AC motors from overload, phase loss, and unbalanced current, preventing damage and extending motor life.

What motor capacities can it handle?

The NJBK1 series covers 0.5 kW to 200 kW motors, making it suitable for light to heavy-duty industrial equipment.

How is the current and trip class set?

Through a rotary knob, allowing quick adjustment of current range (1–400 A) and tripping characteristics (Class 5–30) based on application needs.

Does it include a visual indication of faults?

Yes. The LED display shows current readings, fault codes, and setting parameters for easy diagnostics.

What mounting options are available?

The NJBK1 can be mounted on a 35 mm DIN rail or fixed directly to a panel, offering flexibility for different installation setups.

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NJBK1 Motor Protector

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