Technical
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What is contact resistance and how is it tested
Contact resistance refers to the resistance generated between the contact surfaces of two electrical conductors. The existence of this resistance is due to imperfect contact on the contact surface, usually due to factors such as surface roughness, oxide layer, contamination, and differences in th...Read more -
GIS insulation status detection method
Ultrasonic and UHF are suitable for detecting the insulation state of GIS (gas insulated switchgear). As an important component of modern power systems, the reliability of GIS is crucial to the safe operation of the power grid. Due to factors such as long-term operation, harsh environmental condi...Read more -
The difference between dielectric strength tester and voltage tester
In the test and maintenance of electrical engineering and electronic equipment, dielectric strength tester and voltage tester are two important test tools. Although the two instruments have a certain overlap in function, their specific uses, test principles and applications are significantly diff...Read more -
15 methods for detecting leakage of SF6 gas-insulated electrical equipment
SF6 (sulfur hexafluoride) is a gas widely used in the power industry, mainly in gas-insulated electrical equipment (GIS). Due to its excellent insulation and arc-extinguishing properties, SF6 is widely used in high-voltage and ultra-high-voltage electrical equipment. However, SF6 gas has an extre...Read more -
Common cable fault types and their causes
Cables are an indispensable part of modern power and communication systems. They carry a lot of electrical energy and information. However, cables may have various faults during use, resulting in system interruptions, equipment damage, and even safety hazards. Understanding the types of cable fau...Read more -
What is a Load voltage regulator ？
In modern power system, voltage stability and reliability are very important. In order to ensure the safe transmission and efficient use of power, On-load Tap Changer Transformer comes into being. It is a special type of transformer that can automatically or manually adjust the output voltage in ...Read more -
Insulated rod AC voltage withstand test method and requirements
In the power system, insulation rod (or insulation rod) is an important safety tool, widely used in the operation and maintenance of high-voltage power equipment. In order to ensure the safety performance of the insulation rod, it is necessary to carry out AC voltage withstand test. In this paper...Read more -
What’s is Oil chromatography ?
Oil chromatography is an important analytical technique, which is widely used in many fields such as chemistry, environmental science and food safety. Its main role is to separate and analyze the different components of complex mixtures, especially in the petrochemical industry, oil chromatograph...Read more -
Differences Between Impedance and Resistance
In electrical engineering and physics, impedance and resistance are two concepts that are often mentioned. Although the two terms are used interchangeably in some contexts, their meanings and applications are significantly different. To gain a deeper understanding of these two concepts, we will e...Read more -
TEV Partial Discharge Detection Principle
The TEV partial discharge detection principle is a non-contact method for detecting partial discharge activity in high-voltage equipment. By receiving and analyzing high-frequency electromagnetic signals generated on the surface of the equipment, the presence and location of any partial discharge...Read more -
What role does SF6 gas leak detector play in the power system
With the gradual improvement of voltage levels in domestic substations, the use of SF6 high-voltage circuit breakers in the power sector is currently growing at a rate of about 15% per year. In the fields of high voltage, ultra-high voltage, and ultra-high voltage switches, SF6 gas has almost bec...Read more -
High voltage switch dynamic characteristic tester technology guiding
Why do we need to first connect the grounding wire and then connect the broken wire when grounding the instrument on site? Answer: During on-site testing, due to the high induced voltage between the fracture of high-voltage switches (especially above 220kV) and the ground, this voltage value is l...Read more