Technical Guide

Technical Guide

  • Principle of Pulse Current Method of Digital Partial Discharge Detector

    Principle of Pulse Current Method of Digital Partial Discharge Detector

    When the field strength of the applied voltage in the electrical equipment is enough to cause the discharge in the insulating part area, but the discharge phenomenon that no fixed discharge channel is formed in the discharge area is called partial discharge.                                  ...
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  • The  method to find resonance point in cable series resonance test

    The method to find resonance point in cable series resonance test

    The cable series resonance test refers to the AC withstand voltage test of the cable using the series resonance test device. In addition, the device can also perform insulation tests on transformers, GIS, and electrical equipment other than large capacity. GDTF series cable frequency conversion s...
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  • What is the significance of partial discharge detection for insulation products?

    What is the significance of partial discharge detection for insulation products?

    Partial discharge detection is of great significance to high-voltage cables and to study the characteristics of partial discharges in insulation, especially power cables.                                                                                                                               ...
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  • What are the main applications of  GD-877 thermal imaging camera?

    What are the main applications of GD-877 thermal imaging camera?

    HV HIPOT GD-877 infrared thermal imager adopts 25um160*120 detector, and the temperature measurement range is -20°C~+650°C.                                                                                                                                                                             ...
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  • The purpose and test method of AC withstand voltage test of transformer

    The purpose and test method of AC withstand voltage test of transformer

    The AC withstand voltage test of the transformer is a test in which a sinusoidal power frequency AC test voltage exceeding a certain multiple of the rated voltage is applied to the tested transformer winding together with the bushing, and the duration is 1min. The purpose is to use a test voltage...
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  • What is the difference between a voltage transformer and a current transformer?

    What is the difference between a voltage transformer and a current transformer?

    What is the difference between voltage transformers and current transformers in terms of their working principles?                                                                                                                                                                           HV HIPOT GDP...
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  • How to solve the overvoltage problem of the frequency  AC  resonant test system ?

    How to solve the overvoltage problem of the frequency AC resonant test system ?

    The frequency AC resonant test system is used to identify the insulation strength of electrical equipment. It is of decisive significance for judging whether the electrical equipment can be put into operation. It is also an important means to ensure the insulation level of the equipment and avoid...
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  • What is transformer winding frequency response?

    What is transformer winding frequency response?

    Transformer winding deformation refers to the irreversible changes in the size and shape of the winding under the action of machinery and electricity. It includes changes in axial and radial dimensions, body displacement, winding twist, bulging and inter-turn shorts, etc. The reason is that the t...
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  • Precautions for  Oil Chromatography Analyzer

    Precautions for Oil Chromatography Analyzer

                                                                                                                        HV HIPOT GDC-9560B Power system Insulation Oil Gas Chromatography Analyzer Installation and removal of chromatographic column: 1. The installation and removal of the chromatographic...
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  • Application of Power Quality Analyzer

    Application of Power Quality Analyzer

    In the actual test and analysis of the power quality of the power grid, a power quality analyzer is needed. This device is widely used in the measurement of power quality and is very popular among electric power workers. In this article, HV Hipot will give a brief introduction for this equipment ...
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  • The features and functions about HV HIPOT CT/PT Analyzer

    The features and functions about HV HIPOT CT/PT Analyzer

    HV HIPOT GDHG-201A Transformer Comprehensive CT/PT Analyzer (transformer frequency conversion volt-ampere characteristic tester) is a special testing instrument used for relay protection and high voltage insulation to test protection current transformers and protection voltage transformers. The i...
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  • Problems in the test site of the loop resistance tester

    Problems in the test site of the loop resistance tester

    When the loop resistance tester (also called the contact resistance tester) designed according to the traditional design principle was tested in the field, it was found that there was a common problem. When the voltage connection circuit of the tester is in poor contact or open circuit, the teste...
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