Capacitance current tester measurement method

　　There are many methods for measuring capacitance current testers, such as single-phase metal grounding method, neutral point external capacitance method, neutral point external voltage method, etc. In the early days, the single-phase metal grounding method was generally used to measure capacitance current. This method uses a circuit breaker to operate, and the distribution network line is artificially tested for single-phase grounding, and then the capacitance current entering the ground is directly measured through a current transformer.

　　This method is dangerous and complicated, and the test is also very harmful. Currently, the neutral point added capacitance method is commonly used. There are many capacitance and current instruments on the market, and the prices are relatively mixed. Among the many comparisons, the following examples use capacitance and current testers.

　　According to the capacitance and current tester, the neutral point added capacitance method is adopted. Among many comparisons, this instrument is simple. The capacitor is directly added to the instrument, and there is no need to manually re-wire the capacitor.

　　Before measuring the system capacitance current, it is necessary to remove the arc extinguishing device and short-circuit the detuning device. For safety, safety equipment (insulating gloves, insulating boots, etc.) must be worn during measurement.

　　In the actual measurement of the 66kV system, the neutral point voltage is measured first. The measured voltage is 850V, which is within the normal working range of the capacitance current tester (ie 0-1000V), and the capacitance current tester is used normally.

　　According to the measurement results, it is necessary to add an arc extinguishing device with a larger current than the measured current to ensure system safety.

　　In the era of the electrical industry that keeps pace with the times; customers choose to buy from a supplier not only based on the price, performance, value, etc. of the product, but also pay attention to the quality of the company's after-sales service. After testing, it was found that the capacitance and current tester is simple to use, the data is accurate, and it is easy to carry, so it has a more outstanding cost-effectiveness among the capacitance and current test instruments purchased.