Online monitoring device for switchgear partial discharge

summary

The LHJF21 switchgear partial discharge online monitoring system mainly uses ultra-high frequency and ultrasonic partial discharge sensors to detect partial discharge signals during the operation of electrical equipment, in order to determine whether there are insulation hazards inside high-voltage electrical equipment. When insulation defects occur inside high-voltage electrical equipment, partial discharge signals will be generated. By detecting and analyzing partial discharge signals, it is possible to determine whether there are insulation hazards inside high-voltage electrical equipment and prevent potential accidents from further escalating.

One of the system components

The main components of partial discharge online monitoring for LHJF21-LB switchgear are: comprehensive detection device LHJF21-LB, partial discharge detection and monitoring device LHJF21-UA, and 2.4G wireless temperature sensor (strap type, power type).

Mainly used in switchgear:
The LHJF21-LB comprehensive detection device receives ultrasonic, ground wave, and ultra-high frequency signals from a single wireless partial discharge detection device inside the switchgear through a 485 line, as well as temperature data from six 2.4G wireless temperature sensors. The data is transmitted to the backend system through a 485 line.

Product Features of LHJF21-LB System Composition

System Composition 2

The LHJF21-A device for online monitoring of partial discharge in switchgear mainly consists of wireless data receiver LHJF21-A, wireless partial discharge detection and monitoring devices LHJF21-UA and LHJF21-TA, space ultra-high frequency data receiver LHJF21-AD (optional), and space ultra-high frequency partial discharge sensor LHJF21-U (optional).

Mainly used in power distribution rooms:
The LHJF21-A wireless data receiver wirelessly receives up to 50 partial discharge monitoring devices (sensors) in the distribution room and transmits the data to the backend system through RS485 cable. If the on-site transmission distance is close, the LHJF21-A receiver can be installed next to the backend system. The spatial partial discharge monitoring device receives high voltage indoor ultra-high frequency partial discharge signals through spatial partial discharge ultra-high frequency monitoring sensors, transmits them to the backend system through Ethernet, and is installed on the wall.

Product Features of LHJF21-A System Composition II