Technical Guide

Technical Guide

  • The differences between series and parallel resonators

    The differences between series and parallel resonators

    Series resonance is a typical AC voltage withstand test device in power test. So what is the difference between series resonance and parallel resonance, and what are their characteristics? The difference between series resonance and parallel resonance: it has different functions in the resonant s...
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  • Attention in maintenance and testing about Contact resistance tester

    Attention in maintenance and testing about Contact resistance tester

    The contact resistance tester is widely used in the measurement of contact resistance, loop resistance, cable and wire, weld contact resistance of various domestic electrical control switches in enterprises. Our company R & D and production of high-precision contact resistance tester, accurat...
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  • Dc resistance measurement of dry type transformer windings

    Dc resistance measurement of dry type transformer windings

    First, the purpose of winding DC resistance measurement 1.1 Whether the welding or mechanical connection at the connection of the winding wire is good, whether there is welding or poor connection. 1.2 Whether the pin is properly connected to the shell and the pin is properly connected to the tap-...
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  • Four ways to judge the degree of aging of electrical equipment

    Four ways to judge the degree of aging of electrical equipment

    Using electrical equipment for aging has a big safety risk. Therefore, judge the degree of aging of electrical equipment, avoid accidents and maintain the stability of the power system. How to determine the service life of electrical equipment? HVHIPOT  editor introduce everyone to know 3 methods...
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  • How to use a ground resistance tester in harsh environments?

    How to use a ground resistance tester in harsh environments?

    In sandy and stony soils with high earth resistivity, a grounding network composed of multiple grounding bodies in parallel is often used to meet the requirement of low grounding resistance. But sometimes a lot of steel is used and the ground area is large. It is often difficult to achieve the re...
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  • Precautions for Power frequency High voltage test

    Precautions for Power frequency High voltage test

    Some of the main factors that affect the power frequency withstand voltage test are as follows: 1. First of all, we need to choose the appropriate capacity of the test equipment. If the capacity of the test equipment is insufficient or too large, the field test will be affected. 2. The impact of ...
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  • Why do power cables overheat during operation

    Why do power cables overheat during operation

    With the development of electricity, more and more people rely on electricity in life, and the importance of wire and cable has also been highlighted. We know that wires and cables are used for power transmission. If the wire and cable continue to heat during operation, the temperature of the wir...
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  • How to reduce transformer partial discharge ?

    How to reduce transformer partial discharge ?

    Measures to reduce partial discharge of transformers 1. Dust control Among the factors that cause partial discharge, foreign matter and dust are very important factors. The test results show that the metal particle with the diameter of Phi 1.5μm can generate much more than 500pC discharge under t...
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  • Fault analysis and treatment of relay protection

    Fault analysis and treatment of relay protection

    First, relay protection fault analysis 1, current mutual inductance saturation fault The saturation of current transformer to the relay protection of power system is very large. With the increase of the terminal capacity of the distribution system equipment, the short circuit current will be larg...
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  • How to improve the sensitivity of oil chromatography analyzer?

    How to improve the sensitivity of oil chromatography analyzer?

    Oil chromatography analyzers mainly use differences in boiling points, polarities and adsorption properties of substances to separate mixtures. After the sample to be analyzed is vaporized in the vaporization chamber, an inert gas (i.e., carrier gas, also called mobile phase) is brought into the ...
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  • Common causes and solutions of short circuit damage to dry-type transformers

    Common causes and solutions of short circuit damage to dry-type transformers

    1. In recent years, dry-type transformer accidents have occurred frequently. From the analysis of dry-type transformer accidents, short-circuit damage has become the main cause of power dry-type transformer accidents, causing great harm to the power grid and seriously affecting the safe operation...
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  • Knowledge points related to partial discharge tester

    Knowledge points related to partial discharge tester

    Partial discharge refers to electrical breakdown under sharp voltage gradients in insulation systems, usually manifesting as non-sustained, pulse-like discharges.                                                         GDPD-316M handheld partial discharge inspectior 1. Working principle: The par...
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