Technical
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Steps for Cable Fault Locating
1. Between the determination of cable fault, the tester must first determine the nature of the cable fault in addition to mastering the performance and operation methods of the machine, so as to adopt appropriate working methods and test methods. First, use a megohm meter or multimeter to measu...Read more -
How to use the interturn impact withstand voltage test tester
The interturn impulse voltage tester is based on the basic principle of detecting the symmetrical balance of the impedance of the tested object. The equivalent overvoltage simulation test of the motor and transformer windings is carried out by using the shock wave comparison method with high freq...Read more -
How to test the moisture in SF6 gas?
With the wide application of SF6 in ultra-high voltage and UHV circuit breakers, it has replaced oil as an arc extinguishing medium, and has largely replaced compressed air. There are more and more instruments used to detect whether SF6 leaks on the market. Today, we will understand what are the...Read more -
High voltage switch dynamic characteristics tester technical questions and answers
1. When the instrument is grounded on site, why do we need to connect the ground wire first and then the break wire? Answer: During field tests, there is often a high induced voltage between the fracture of a high-voltage switch (especially above 220kV) and the ground. This voltage has a large ...Read more -
Common knowledge about power cables
Tips on choosing wires for decoration: lighting wires should be 1 square millimeter to 1.5 square millimeters, socket wires should be 2.5 square millimeters, air conditioning wires should not be less than 4 square millimeters, and it is recommended to use 4 square millimeters or more. The groundi...Read more -
What is the difference between a voltage test and an insulation test
Voltage test and insulation test are both test methods for electrical equipment. However, it is generally necessary to do the insulation test before the voltage test, because the voltage is a destructive test, only to ensure that the insulation of the equipment is not a problem, and then to play ...Read more -
The necessity and function analysis of SVG in photovoltaic power station
With the enhancement of global environmental awareness and the rapid development of renewable energy, photovoltaic power generation has gradually entered people’s lives as a clean energy. However, in the operation of photovoltaic power plants, power quality problems have become increasingly...Read more -
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...Read more -
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...Read more -
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-...Read more -
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...Read more -
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...Read more