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Acrel APD300L UHF Partial Discharge Detector
Series of products: Products
Series of products: Power Monitoring and Controlling Devices
Series of products: Partial Discharge Detectors
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Overview
At this stage, metal-enclosed switchgear is widely used in the power system, so the stability and reliability of the switchgear operation is the top priority. Defects such as bubble gaps, impurities, spikes and other defects in the insulation of medium-voltage electrical equipment make the electric field distribution inside the insulation of the switch cabinet uneven under the action of strong electric field, and the electric field strength in the defective part will increase, which will easily lead to the discharge of the part that does not penetrate the entire insulation, that is, partial discharge.
Partial discharge generally does not cause the penetrating breakdown of the internal insulation of the switchgear, but it can lead to local damage to the insulating medium. If it exists for a long time, it will cause the destruction of the electrical strength of the insulation device under certain conditions, and eventually cause the insulation breakdown inside the switchgear.
For electrical equipment, partial discharge of electrical equipment is one of the important reasons for the aging or deterioration or even damage of its insulation, resulting in equipment damage and power system accidents, and it is also a sign of degradation of equipment insulation integrity. Therefore, the partial discharge monitoring of electrical equipment is an important means to evaluate the insulation status of the equipment, and it is also one of the effective measures to find the latent fault of the equipment to achieve fault warning and avoid the occurrence of failure.
The APD series medium-voltage switchgear partial discharge detector device detects the partial discharge signal of the electrical equipment during operation through ultra-high frequency sensors (UHF), ground wave sensors (TEV) and ultrasonic sensors (AE), so as to judge whether there are hidden insulation hazards inside the high-voltage electrical equipment, give early warning, and ensure the safe and reliable operation of the power system.
Coding Rule
Dispaly
Application
Network
Models
Dimension & Installation
APD300-L triple-in-one wired partial discharge sensor adopts a strong magnetic adsorption mounting method and is installed on the cabinet wall in the cable compartment of the switchgear. The detailed dimensions of the product are shown in the figure, in mm.
APD300L Partial Discharge Detector
Product Description:- PView
- high-performance
- requirements
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Technical Features
型号Type
参数Parameters
APD100
检测通道
Number of channels
1路
One
测量范围
Measuring range
-60dBm~+10dBm
测量内容
Measurement content
放电幅值、放电频次
Discharge amplitude and frequency
采样周期
Sampling
1s
匹配阻抗
Matching impedance
50Ω
工作电源
Power supply
DC12~36V
（标配一个DC/AC 220V/110V- DC 24V 电源转换模块）
（Standard configuration include a DC/AC 220V/110V to DC 24V power conversion module）
功耗
Power dissipation
≤3W
通信方式
Communication
RS485 * 1、LORA * 1
波特率(bps)
Baud rate
2400、4800、9600、19200
（RS485）
通信协议
Communication protocol
MODBUS-RTU（RS485）
继电器输出
Relay output
1路常开；5A/AC250V，5A/DC30V
1 circuit normally open relay
安装方式
Installation
35mm导轨式安装
35mm guide rail installation
工作环境
Usage environment
温度：-25 ℃～+70 ℃；相对湿度≤95%
Temperature: -25 ℃~+70 ℃; Relative humidity ≤ 95%
特高频
传感器
UHF sensor
检测带宽
Bandwidth
300MHz~1600MHz
等效高度
Effective height
≥10.5mm
接口类型
Interface
SMA
连接电缆
Connecting cables
同轴电缆 Coaxial cable
防护等级
Protective class
IP65
安装方式
Installation
磁吸式
Magnetic
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