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The test points of the partial discharge detector?

time:2020/12/30   source:华天电力  reading:297 time

The partial discharge detector has high detection sensitivity, large sample capacitance coverage, a wide range of applicable samples, complete input unit (detection impedance), and multiple frequency band combinations (nine types). After proper calibration, the instrument can directly read the discharge volume of the discharge pulse. It is suitable for partial discharge measurement of various high-voltage electrical equipment, covering the measurement range of full voltage and capacity levels.


The three main points that should be paid attention to in the partial discharge detector test?


1. Before the test starts to pressurize, the test personnel must check the circuit in detail and comprehensively to avoid wrong wiring. 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 when the head is pinched and the tail is being prepared for work, this may cause personal and equipment accidents.


2. For connecting wires, avoid exposing * to the outside to prevent * corona discharge, especially for partial discharge tests with higher voltage levels. If necessary, thicken high-voltage connecting wires and install anti-corona covers to reduce the field strength. Corona discharge caused by too high. The shielding cover should not be in contact with the porcelain skirt of the test product.


Partial Discharge Detector.png


3. Under normal circumstances, during the test, the partial discharge of the test product during the 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, with the standard not exceeding the full scale. When the voltage drops to the measured voltage, turn the coarse gain adjustment switch clockwise for one or more gears to record the measured value.


1. Before the test starts to pressurize, the test personnel must check the circuit in detail and comprehensively to avoid wrong wiring. 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 when the head is pinched and the tail is being prepared for work, this may cause personal and equipment accidents.


2. For connecting wires, avoid exposing * to the outside to prevent * corona discharge, especially for partial discharge tests with higher voltage levels. If necessary, thicken high-voltage connecting wires and install anti-corona covers to reduce the field strength. Corona discharge caused by too high. 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 the 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, with the standard not exceeding 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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