The ultra-low frequency insulation withstand voltage test is actually an alternative method of the power frequency withstand voltage test. We know that when power frequency withsta
Dec 02, 2021
In the process of operation, the circuit breaker is not only subjected to mechanical force, electricity, heat, etc., but also subjected to the influence of the natural environment.
Nov 30, 2021
What tests should be done before the transformer is put into use after being shut down for 1 month or put aside or shut down for more than 6 months? 1. After the transformer is shu
Nov 28, 2021
AC withstand voltage test is the most effective and direct method to identify the insulation strength of power equipment. During the operation of power equipment, the insulation wi
Nov 27, 2021
1、When using the DC resistance tester, the resistance value cannot be measured There are generally two reasons for the phenomenon that the value cannot be measured. The first reaso
Nov 26, 2021
The test results of series resonance are sometimes affected by uncertain factors. These uncertain factors include: 1. The influence of weather In the case of high humidity, the cor
Nov 24, 2021
1. Common types of cable faults 1. Low resistance fault, cable insulation material is damaged, and ground fault occurs. The insulation resistance Rf is less than 10Z0 (Z0 is the wa
Nov 22, 2021
The instruments used to measure insulation resistance are: 1. The megohmmeter is mainly used to check the insulation resistance of electrical equipment, household appliances or ele
Nov 21, 2021
The detection indicators of lubricating oil are as follows: 1.Viscosity: Viscosity is the most important single performance indicator of lubricating oil, and it is the main factor
Nov 18, 2021
Cloud point refers to the high temperature at which the oil begins to appear turbid by the appearance of hydrocarbon microcrystals or water mist under the test conditions. After th
Nov 20, 2021
TRANSFORMER TESTING 1. Ratio Test The ratio test ensures that the transformer windings have the proper turns to produce the voltages required. The ratio is a measure of the voltage
Nov 17, 2021
Power transformer is one of the most important power equipment in power plants, substations and power departments. It is a power transmission and conversion device. Measuring the i
Nov 12, 2021
