Technical
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The power frequency withstand voltage test must be carried out in accordance with the safety operation procedures.
The test voltage for power frequency withstand voltage is much higher than the operating voltage of the equipment. Excessive test voltage can cause the insulation medium to heat up and discharge, accelerating the development of insulation defects. Therefore, it is a destructive test. Before condu...Read more -
Main performance features of the commonly used transformer comprehensive tester
The transformer comprehensive tester is a multi-functional on-site testing instrument specially designed for testing the伏安 characteristics, transformation ratio, polarity, error curve, calculating the inflection point, and checking the secondary circuit of transformers. During the experiment, o...Read more -
Safety Operating Instructions for Multi-frequency Voltage Generator
1. Before use, please check whether all control switches, knobs, and display are complete. 2. First, switch the power switch to the OFF position. 3. To ensure the safety of the equipment, please reconfirm the input voltage before connecting the power supply. 4. Turn on the power switch. After abo...Read more -
Common Faults and Usage Precautions of the Clamp-type Ground Resistance Tester
1. During the power-on self-check, the instrument should be in a relaxed and natural state. When holding the instrument with one hand, the fingers should not touch the handle. This is very important for ensuring measurement accuracy. 2. When the measured resistance is large (for example, greater ...Read more -
Main Equipment and Selection Criteria for 35kV Dielectric Withstand Test
In the assessment of insulation performance for electrical equipment, AC withstand voltage testing at 35 kV is a critical method for evaluating insulation strength and identifying localized insulation defects. On-site “35 kV withstand voltage testers” are not single-purpose universal ...Read more -
The test principle and application of the impulse voltage generator test device
The impulse voltage test is one of the basic items in high-voltage tests for electrical equipment. After the design, manufacture, and repair of electrical equipment, it is required to conduct impulse tests to verify or inspect the equipment. Common electrical equipment includes power transformers...Read more -
Principle and Test Procedures of the Preventive Test Equipment for Insulating Boots and Gloves
The preventive test device for insulating gloves is mainly composed of a power frequency test transformer, an intelligent test control console, and a dedicated test water tank. It can conduct insulation withstand voltage tests for multiple pairs of gloves simultaneously. It adopts fully automatic...Read more -
The solution for dealing with the situation where the measured resistance value of the transformer exceeds the standard when using the DC resistance tester
The measurement of DC resistance is used to check the welding quality of the windings and whether there are inter-turn short circuits in the windings; to determine whether the position of the tap changer is correct and whether the actual position matches the indication; to check for any breakage ...Read more -
Main Features and Test Precautions of Power Frequency Withstand Voltage Testing Equipment
The power frequency withstand voltage test, also known as the alternating current withstand voltage test, is a type of insulation withstand voltage test in the power system. The power frequency withstand voltage test device consists of a test transformer and an intelligent control console. It is ...Read more -
Main Test Items, Standards, and Corresponding Test Equipment for Transformers
Transformer testing is a crucial method for verifying equipment manufacturing quality, installation techniques, and operational conditions. According to standards such as electrical equipment commissioning test specifications and preventive maintenance procedures for power equipment, systematic t...Read more -
Grounding device allows for grounding resistance values and complies with standard grounding resistance specifications
The grounding device can perform its intended function during operation, and its grounding resistance should all comply with the requirements of the regulations. For various commonly used grounding devices, the allowable grounding resistance values (in ohms) are as follows: (1) For the working gr...Read more -
The purpose and precautions for measuring the insulation resistance of motor windings
The purpose of measuring the insulation resistance of the motor winding is to check the moisture and contamination of the winding insulation material, as well as to determine whether there is a short circuit between the winding and the casing or between the three-phase windings. This is to ensure...Read more