XJ11(XJ3 D) Three Phase failure Sequence Protection Relay over under voltage reversal relay

XJ11(XJ3-D) Three Phase failure Sequence Protection Relay over under voltage reversal relay 

Application and Feature

1).Overvoltage / Under voltage / Phase failure / Phase sequence Protection Relay (hereinafter Protection Relay), connected with the switching electrical device(like AC contactor etc.) as the protective circuit to do efficient protection for the breakdown which probably occurred over voltage,under voltage,phase failure,phase sequence in the inevasible 3 phase AC and transmission equipment( for example water pump,draught fan. Conveyer bait, air compressor, feeder line).

2). Protection Relay are widely used in the low voltage power distribution system of using 3 phase 50HZ  in the industry,agriculture and service.

3). Protection Relay can disconnect the power supply of the main circuit to reaching the purpose of protecting the equipment    and human safety under the conditions as below: when the phase sequence of Protection Relay is wrong connected with the pre-confirmed phase sequence due to change or maintain, occurred phase failure in the supply circuit. Occurred over voltage or under voltage in the supply power grid.

4). Protection Relay adopts the advanced technique of voltage test its main parts. Its feature are reliable operation, accurate failure indication, strong anti-interference, small volume, simple installation and use , furthermore it cannot be influenced by the big or small power of been protected equipment.

Main Technical Parameter: