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Partial discharge detector is testing

time:2021/3/26   source:华天电力  reading:244 time

The digital partial discharge detector is a new type of instrument developed and produced. The instrument has the advantages of high sensitivity, large dynamic range of the amplifier system, wide range of test samples, and easy operation. It also adopts advanced anti-interference components and unique door display circuit, strong anti-interference ability, and has four kinds of high-frequency ellipse scanning, which is suitable for high-voltage product type, factory test, new product development test, motor, transformer, cable, Bushings, capacitors, transformers, lightning arresters, switches and other high-voltage electrical appliances.


The digital partial discharge detector adopts advanced anti-interference components and unique gate display circuit, and has four kinds of high-frequency ellipse scanning, which is suitable for the type of high-voltage products, factory tests, new product development tests, motors, transformers, cables, and sleeves. Quantitative test of partial discharge of tubes, capacitors, transformers, arresters, switches and other high-voltage electrical appliances. It can be used on site by manufacturing plants, scientific research departments and electric power departments.


Partial Discharge Detector.png



Precautions for digital partial discharge detector

1. Before the test starts to pressurize, the test personnel must check the circuit in detail and comprehensively to avoid wrong connection of the circuit. Test whether the grounding wire of the instrument is firmly connected to the grounding body. If the connection is not firm or the wire is kicked off by the foot when the head is pinched during preparation, this may cause personal and equipment accidents.


2. Avoid exposing the connecting wires to prevent corona discharge, especially for partial discharge tests with higher voltage levels. If necessary, thicken the high-voltage connecting wires and install an anti-corona cover to reduce the excessive field strength. Caused by corona discharge. The shielding cover should not be in contact with the porcelain skirt of the test product.


3. Under normal circumstances, during the test, the partial discharge of the test product during withstand voltage and pre-boost is much larger than the normal value. At this time, the instrument will inevitably exceed the full scale. In order to prevent damage to the instrument, the coarse gain adjustment knob of the instrument should be turned counterclockwise by one or more steps, and the standard is not to exceed the full scale. When the voltage drops to the measured voltage, turn the coarse gain adjustment switch clockwise by one or more gears to record the measured value.


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