CHINT'S Low Voltage Brief Catalogue

Protection Relay Protection Relay Protection Relay

Low Voltage Brief Catalogue Low Voltage Brief Catalogue 090 Low Voltage Brief Catalogue P - P-046 P-046

NJYB3 Relay

▪ NJYB3 relay is used to provide overvoltage, undervoltage, phase failure, phase sequence and three-phase unbalance control in three-phase three-wire 380V circuits and three- phase four-wire 220V circuits with a frequency of AC 50Hz(or 60Hz). For example, it is used for power control systems, air conditioning systems and motors. ▪ NJYB3 relay is used to provide overvoltage, undervoltage, phase failure, phase sequence and three-phase unbalance control in three-phase three-wire 380V circuits and three- phase four-wire 220V circuits with a frequency of AC 50Hz(or 60Hz). For example, it is used for power control systems, air conditioning systems and motors.

NJYB3

NJYB1 Voltage Protection Relay ▪ This product is used in AC 50Hz three-phase four wire 220V circuit. ▪ It can detect fault state as overvoltage, undervoltage, phase-failure and phase- sequence through advanced electronic circuit check, and provide reliable protection. ▪ This product is used in AC 50Hz three-phase four wire 220V circuit. ▪ It can detect fault state as overvoltage, undervoltage, phase-failure and phase- sequence through advanced electronic circuit check, and provide reliable protection.

NJYB1

XJ3 Phase-Failure and Phase-Sequence Protective Relay

▪ XJ3 series phase failure and phase sequence protection relay is used to provide overvoltage, undervoltage and phase failure protection in three-phase AC circuits and phase sequence protection in irreversible transmission devices and features reliable performance, wide application and convenient use. ▪ The protector starts to function when it is connected to the power control circuit in accordance with the drawing. ▪ When the fuse of any phase of the three-phase circuit is open or when there is a phase failure in the power supply circuit, the XJ3 operates immediately to control the contact to cut off the power supply of the AC contactor coil of the main circuit so that the main contact of the AC contactor operates to provide the load with phase failure protection. ▪ When the fuse of any phase of the three-phase circuit is open or when there is a phase failure in the power supply circuit, the XJ3 operates immediately to control the contact to cut off the power supply of the AC contactor coil of the main circuit so that the main contact of the AC contactor operates to provide the load with phase failure protection. ▪ When the phases of a three-phase irreversible device with predetermined phase sequence are connected incorrectly due to maintenance or change of the power supply circuit, the XJ3 series will identify the phase sequence, stop supplying power to the power supply circuit and achieve the goal of protecting the device. ▪ When the phases of a three-phase irreversible device with predetermined phase sequence are connected incorrectly due to maintenance or change of the power supply circuit, the XJ3 series will identify the phase sequence, stop supplying power to the power supply circuit and achieve the goal of protecting the device. ▪ XJ3 series phase failure and phase sequence protection relay is used to provide overvoltage, undervoltage and phase failure protection in three-phase AC circuits and phase sequence protection in irreversible transmission devices and features reliable performance, wide application and convenient use. ▪ The protector starts to function when it is connected to the power control circuit in accordance with the drawing.

XJ3