1、 Product Overview

At present, the power system has increasingly high requirements for the quality of electrical energy, not only to ensure stable and reliable power supply, but also to ensure the safety of power supply. In the power system, metal enclosed switchgear is widely used, so the stability and reliability of switchgear operation are of utmost importance. Electrical equipment is subjected to high temperature, voltage, vibration, and other chemical reactions during operation, which will reduce its insulation performance, produce partial discharge phenomena, and accelerate insulation deterioration, causing significant economic losses to the power system. However, due to the small internal space, numerous components, complex structure, and small insulation distance of the switchgear, it is more prone to insulation defects than other power equipment, which poses a huge hidden danger to the safe operation of the equipment.

Defects such as bubble gaps, impurities, spikes, etc. inside the insulation of high-voltage electrical equipment, under the action of strong electric fields, cause uneven distribution of electric fields inside the insulation of the switchgear. The electric field strength at the defect site will increase, which can easily lead to partial discharge that does not penetrate the entire insulation at that location.

Partial discharge generally does not cause penetrative breakdown of the insulation inside the switchgear, but it can lead to local damage to the insulation medium. If it exists for a long time, it will cause damage to the electrical strength of the insulation device under certain conditions, ultimately leading to insulation breakdown inside the switchgear. Therefore, for electrical equipment, partial discharge is one of the important causes of insulation aging, deterioration, and even damage, leading to equipment damage and power system accidents. At the same time, partial discharge is also a sign of equipment insulation integrity degradation. Therefore, monitoring and detecting partial discharge of electrical equipment is an important means to evaluate the insulation condition of the equipment, and it is also an effective measure to detect latent faults in the equipment, ultimately achieve fault warning, and avoid the occurrence of faults.

The APD series high-voltage switchgear partial discharge monitoring device detects the electromagnetic wave radiation generated by partial discharge and automatically determines the actual detection frequency of on-site partial discharge. Then, it uploads data such as the number of discharges and discharge frequency of the detected partial discharge to the server.

Function:

The APD series high-voltage switchgear partial discharge monitoring device evaluates the insulation condition of electrical equipment by detecting the electromagnetic wave radiation generated by partial discharge, real-time monitoring of the number and frequency of partial discharges in the switchgear, and detecting latent faults in the equipment to achieve fault warning and avoid faults.

Application scope:

3-35kV indoor switchgear.

Ordering Example:

Specific model: APD100

Technical requirement: 6-meter connecting wire

Communication protocol: RS485 interface MODBUS-RTU protocol

Auxiliary power supply: AC/DC 220V

Technical parameters:

Application networking diagram:

Overall dimensions: