Necessity of Electric Power Preventive Test

Preventive test focuses on "prevention" and "prevention in advance". Power equipment running in the power system need to undergo strict testing to ensure its safe operation, so as to ensure the safety of users' lives and properties. Therefore, preventive test plays an important role in the power system!

According to China's regulations, the power equipment in the power system shall be tested in accordance with the requirements of the power industry standard of the people's Republic of China, DL / T596-1996 preventive test code for power equipment.

Necessity of preventive test:

The power system is running a large number of power equipment, and the safe operation of power equipment is the premise to ensure the safe and reliable power generation and supply.

There may be some quality problems in the design and manufacturing process of power equipment, and damage may occur in the installation and transportation process, which will cause some latent faults. In the operation of power equipment, due to the influence of voltage, heat, chemistry, mechanical vibration and other factors, its insulation performance will deteriorate, even lose the insulation performance, resulting in accidents.

According to the relevant statistical analysis, more than 60% of power outages in the power system are caused by equipment insulation defects. There is a certain development period for the deterioration and defect development of the insulation part of the equipment. During this period, the insulation material will send out various physical, chemical and electrical information, which reflects the change of the insulation state. This requires the electrical test personnel of the operation Department to know and master the insulation condition of the equipment before or during the operation of the equipment through the electrical test, so as to accurately and timely find and handle the fault at the early stage of development. The name comes from preventive testing.

The insulation defects of power equipment are divided into two categories: the first category is concentrated defects, such as partial discharge, partial moisture, aging, and partial mechanical damage; the second category is distributed defects, such as insulation overall moisture, aging, deterioration, etc. The existence of insulation defects will inevitably lead to the change of insulation performance. Through various test methods, the electrical tester can measure the data parameters related to its insulation performance, find out the insulation defects and deal with them in time, so as to prevent accidents in advance.

GDZX is a manufacturer of electric power test equipment, including series resonance device, high-voltage test equipment, high-voltage switch tester, microcomputer relay protection tester, loop resistance tester, power cable fault tester, electric energy measurement and test equipment, lightning protection tester, grounding resistance insulation resistance test equipment, SF6 gas test and oil test equipment, Battery tester, etc.