How to correctly select and use the gain of a partial discharge instrument?

A partial discharge instrument is an instrument used to detect and diagnose capacitive discharge in electronic devices. The correct selection and use of a partial discharge instrument is crucial for obtaining accurate and reliable measurement results. Here are some suggestions on how to correctly select and use the gain of a partial discharge instrument.

1. Understand your application requirements

Before selecting a partial discharge instrument, it is necessary to determine your application requirements. Partial discharge instruments are commonly used to measure partial discharge in capacitors, inductors, transformers, and other electronic components. Determine factors such as the voltage and current range to be measured, measurement accuracy, and sampling rate.

2. Choose a suitable partial discharge instrument

When choosing a partial discharge instrument, several key factors need to be considered. Firstly, select an instrument with sufficient sensitivity and resolution. Secondly, consider the measurement range and range of the instrument. We also need to consider the sampling rate and data processing capability of the instrument. After ZUI, choose instruments that are easy to use and maintain.

3. Set the gain of the partial discharge instrument

The gain of a partial discharge instrument refers to the small discharge current that the instrument can detect. Setting the gain correctly is crucial for obtaining accurate measurement results. Usually, partial discharge instruments have adjustable gain settings so that they can be adjusted based on the capacitance value and discharge current to be measured.

4. Determine the correct measurement position

When using a partial discharge instrument for measurement, it is necessary to determine the correct measurement position. Usually, a partial discharge instrument needs to be several centimeters to tens of centimeters away from the electronic component to be measured. It is also necessary to ensure that there is no stray capacitance or inductance between the instrument and the component to be measured.

5. Perform calibration and testing

Before using a partial discharge instrument, it should be calibrated and tested. This will help ensure the accuracy and reliability of the instrument. During calibration and testing, standard capacitors and current sources can be used to test the measurement accuracy and sensitivity of the instrument.

6. Pay attention to safety

When using a partial discharge instrument, safety precautions should be taken. Partial discharge instruments usually require the use of high-voltage power sources, so you need to ensure the safety of the instrument and operators. When using a partial discharge instrument, the manufacturer’s safety guidelines and operating instructions should be followed.

The correct selection and use of a partial discharge instrument is crucial for obtaining accurate and reliable measurement results. Choosing the appropriate partial discharge instrument, setting the gain correctly, determining the correct measurement position, conducting calibration and testing, and paying attention to safety are key points when using a partial discharge instrument.

The ZC-830 partial discharge detector can be widely used for partial discharge detection in power systems, including insulation status detection of high-voltage switchgear, ring main unit, voltage/current transformers, transformers (including dry-type transformers), GIS, overhead lines, cables, and other equipment. The discharge degree of electrical equipment is measured by the following indicators: 1. Partial discharge intensity detection: By measuring the discharge signal within one power frequency cycle, Characterize the intensity of partial discharge based on the maximum Z value (dB) in the discharge pulse sequence. 2. Partial discharge frequency detection: The device measures the discharge signal within one power frequency cycle, extracts discharge pulses, and characterizes the frequency of partial discharge based on the number of discharge pulses.

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