1. Scope of application
The XJ series phase failure and phase sequence protection relay is used for phase failure protection in three-phase AC motor control circuits and for phase sequence protection in irreversible transmission equipment. It has reliable performance, wide applicability, and easy use.
According to the wiring diagram, connecting the power control circuit can provide protection. Any phase fuse or circuit open XJ in the three-phase circuit can operate and cut off the power supply of the KM main circuit. Thus achieving the purpose of protecting the electric motor.
When three-phase irreversible equipment (such as water pumps, fans, air compressors, elevator motors, small and medium-sized distribution panels, etc.) is disconnected from the original recognized phase sequence due to maintenance or changes in the power supply line after confirming the phase sequence, the XJ series can still work reliably, identify the sequence phase, cut off the KM main circuit power supply, and achieve the purpose of protecting the equipment.
Protection function
Protect phase failure and phase sequence during startup
Phase failure, phase sequence protection, three-phase voltage asymmetry greater than 10%
Sampling method
Voltage sampling
Protect the contact
One set of normally open contacts, one set of normally closed contacts
Electric shock capacity
Resistive
working voltage
phase voltage
Wide applicability, independent of motor power
Normal working conditions and installation conditions
Usage environment: The altitude does not exceed 2000 meters, the surrounding temperature is not high at 45 degrees Celsius, and not lower than minus 10 degrees Celsius. The voltage variation range of the power supply shall not exceed 85% -110% of the rated voltage. In a medium without severe vibration and explosion hazards, and without gases and dust that can corrode metals and damage insulation, in a place without rain or snow.
Vertical or horizontal installation
technical feature
rated operational voltage
power consumption
Three phase unbalance rate
dielectric strength
The communication lasted for 1 minute without any breakdown phenomenon
insulation resistance