Wuhan Wugao Electric Measurement Co., Ltd

WDJF-400 switch cabinet partial discharge temperature measurement online monitoring system

This system adopts non-contact ultrasonic and transient ground wave partial discharge detection technology, which is suitable for real-time monitoring and abnormal alarm of partial discharge signal of metal-enclosed switchgear products. It has high sensitivity, strong anti-interference performance, and has a variety of communication methods. Features.


   Metal-enclosed complete switchgear products are widely used in factories and mines, power transmission and substations, etc. The safe and reliable operation of these switchgears determines the reliability and safety of power supply and plays an important role in the power supply system. Due to the electrical properties, thermal properties, chemical properties and insulation deterioration formed under abnormal conditions, electrical equipment will inevitably have electrical properties during long-term operation, resulting in reduced electrical insulation strength, partial discharge, and then failure, affecting the service life of the switchgear.


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Product Details

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The system is designed to deploy intelligent wireless partial discharge sensors (non-contact ultrasonic, TEV), wireless temperature measurement sensors, space UHF intelligent wireless sensors outside the cabinet, and cooperate with wireless data acquisition terminals to monitor the operation process of the switch cabinet in real time online. The partial discharge signal and the temperature information of key parts in the device, through the setting of some test thresholds, spectrum analysis, and map display, allow users to easily determine whether there is partial discharge in the equipment, and identify potential faults earlier according to the long-term trend. Hidden dangers, the previous passive detection method has become an active "defense" monitoring, which makes the use of switchgear products safer and more reliable, and also adds new technical highlights to the products.


Ambient conditions

Ambient temperature -15℃~50℃;

Relative humidity ≤90%;


Power supply:

Smart sensor: DC8.4V/9800mAH lithium polymer battery;

Data acquisition terminal: external AC220V power supply;


TEV sensor:  

Measurement range: 0~60dB

Sensor frequency range: 3~100MHz;

Resolution: 0.1dB;

Linearity error: no more than 20%


Ultrasonic sensor:

Detection frequency range: 20kHz~200kHz

Measurement dynamic range: 60dB

Resolution: 0.1dB

Linearity error: no more than 20%


UHF sensor:

Measurement range: -70~0dBm

Sensor frequency range: 300MHz~1500MHz

Resolution: 0.1dBm

Error: ±1dBm


Wireless temperature sensor:

        Temperature measurement range: -25~+125℃

        Measurement accuracy: ±1℃

        Temperature sampling frequency: default minimum 20 seconds (can be customized)


Map display

A variety of graph display modes: 2D PPRS display, 3D PRPD display, sinusoidal display, four-parameter window



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