Technical
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How to test whether the motor winding is grounded
When the windings of the motor short circuit to the ground, short circuit to each other or open the circuit (that is, the winding wire breaks), the motor will fail. The wires in the winding use an insulating covering as an isolation barrier. If the insulation layer of the winding is worn near the...Read more -
What are the measurement methods of using a high voltage generator
High voltage generator alias direct high voltage generator or DC high voltage generator, it is specially used to detect the electrical insulation strength and leakage current of power devices. Generally, the use of high voltage generators is to carry out DC voltage withstand test on zinc oxide ar...Read more -
Ground fault Circuit breaker test troubleshooting
Troubleshooting ground fault circuit interrupts or GFI breakers is simple. Troubleshooting the circuit itself can be time-consuming. The GFI circuit breaker design has a test button integrated into the circuit breaker itself. Pressing the test button should trip the circuit breaker. On a GFI type...Read more -
Causes of partial discharge of high voltage switchgear
During the operation of power equipment, when partial discharge occurs, various charged particles such as electrons, positive and negative ions, stimulated by the electric field, generally have more energy than the bond energy of the polymer. These charged particles strike the walls of the dielec...Read more -
Problems encountered in maintenance and testing of loop resistance tester
Loop resistance testers are widely used in enterprises to measure the contact resistance, loop resistance, cable wires, and weld contact resistance of various household electrical appliance control switches. The high-precision loop resistance tester developed and produced by our company has accur...Read more -
Daily maintenance of cable fault locator
1. Load monitoring Monitoring cable load can help us understand the changes in cable load and analyze the way the cable works. Since overload can seriously damage the cable, the load on the cable should be measured and monitored regularly. Clip-on ammeters can be used to measure the load on cable...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 -
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