Technical
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What is the significance of measuring DC resistance for transformers?
Transformer measurement of DC resistance is an important part of transformer test. Through DC resistance measurement, it s possible to check whether the conductive circuit of the transformer is in poor contact, poor welding, coil failure and wiring errors and a series of defects. ? ? ? ? ? ? ? ? ...Read more -
Why does the AC Resonant Test System generate overvoltage?
The larger the capacitance of the tested product and the leakage reactance of the test transformer, the more obvious the capacitance rise effect. Therefore, when we carry out the AC withstand voltage test of the series resonance large-capacity test object, it is required to directly measure the v...Read more -
Transformer Tap Changer Analyzer winding testing method
Transformer on-load tap-changer tester winding mode: Wiring method (this determines the resistance algorithm, it must be correct); YO type wiring is that the transformer has a neutral point; The Y-type wiring is drawn from the transformer without a neutral point; △ type wiring When testing, ...Read more -
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. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?...Read more -
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...Read more -
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. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?...Read more -
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. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?...Read more -
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...Read more -
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...Read more -
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...Read more -
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...Read more -
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...Read more