XJ3-D Phase break and phase sequence protection relay:

1. XJ3 series of phase break and phase sequence protection relays are used for overvoltage and undervoltage, phase break protection and irreversible transmission equipment in three-phase ac circuit For phase sequence protection, with reliable performance, wide application range, easy to use and so on. 

2. The series protector is connected to the power control loop according to the diagram, which can play a protective role. Any phase fuse in the three-phase circuit is open or supplied When the circuit is out of phase, X J3 acts immediately and controls the contact to cut off the coil power of the ac contactor of the main circuit so as to reach the main contact of the AC contactor Action to protect the load phase break.

3. When the three-phase irreversible equipment is incorrectly connected with the original identified phase sequence due to

maintenance or change of power supply line after phase sequence identification, X J3 series shall be the same The sample can identify the phase sequence and work reliably, stop the power supply circuit, and achieve the purpose of protecting equipment.