CHINT NJB1 SERIES SINGLE PHASE, 3 PHASE VOLTAGE PROTECTIVE RELAY

The CHINT NJB1-X is a protective relay for three-phase systems that guards against phase loss, phase sequence, and voltage unbalance. Conversely, the NJB1-Y2 is a single-phase voltage relay primarily used to monitor and protect against specific over-voltage or under-voltage conditions. NJB1-X (Three-Phase Monitoring) - Core Function: Monitors 380V ~ 480V AC circuits to ensure all three phases are present, in the correct rotational order, and voltage balanced. - Applications: Primarily used in industrial environments to protect expensive 3-phase motors, pumps, and compressors from burning out due to reversed rotation, single-phasing, or severe power imbalances. NJB1-Y2 (Single-Phase Monitoring) - Core Function: Monitors and regulates a single-phase circuit (available in ranges like AC 24V, 110V, or 220V) to trigger if the voltage drops below or spikes above preset safety thresholds. - Applications: Used in residential, commercial, and control panels to protect sensitive single-phase electronics, automation controllers, or lighting systems from over-voltage surges or brownouts.

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