Technical Guide
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The Importance of Precautionary Tests in Electrical Equipment Operation
In order to reduce accidents and prevent accidents, the cables in operation should be regularly subjected to preventive withstand voltage tests. The DC withstand voltage test standard of the cable can refer to the relevant cable operation regulations. In principle, the DC withstand voltage test c...Read more -
Dry-type test transformer use steps
Dry-type test transformers play an obvious role in high-voltage test tests, and are one of the most frequently used instruments and equipment by the majority of testers. The author of HV HIPOT will introduce the standardized test steps of dry-type test transformers to help you improve the test an...Read more -
How dose the Digital Grounding Down Lead Earth Continuity Tester Work ?
GDDT-10U gDigital Grounding Down Lead Earth Continuity Tester is a highly automated portable tester developed by our company. It is used to measure the continuity resistance value between the grounding down conductors of various power equipment in the substation. The instrument is controlled by a...Read more -
Why transformers need do high voltage withstand test?
When the transformer operates in the power grid, it not only has to bear the action of voltage and current in normal operation, but also bear the action of various short-term abnormal voltage and current. Therefore, the transformer must be designed and manufactured to have sufficient safety and r...Read more -
What is Transformer No-load test ?
The no-load test of the transformer is a test to measure the no-load loss and no-load current of the transformer by applying the rated voltage of the rated sine wave rated frequency from the winding on either side of the transformer, and the other windings are open-circuited. The no-load current ...Read more -
Precautions for operating the high voltage insulation resistance tester
Precautions for operating the high voltage insulation resistance tester: HV HIPOT GD3126A/GD3126B Intelligent Insulation Resistance Tester 1. Work on de-energized circuits as much as possible. Use proper lockout/tagout procedures. If these procedures ar...Read more -
Points for attention when doing high voltage AC and DC tests
Points for attention when doing high voltage AC and DC tests 1. The test transformer and control box should have reliable grounding; 2. When doing high-voltage AC and DC tests, 2 or more people must participate, and the division of labor should be clearly defined and the methods of each other sho...Read more -
The importance of VLF withstand voltage device to generator withstand voltage test
During the load operation of the generator, the insulation will gradually deteriorate under the action of electric field, temperature and mechanical vibration for a long time, including overall deterioration and partial deterioration, resulting in defects. The withstand voltage test of generators...Read more -
What is the problem of the inaccurate measurement results of the DC high voltage generator?
The DC leakage test using a DC high voltage generator is to comprehensively analyze the insulation quality of the tested product through the magnitude of the leakage current, the change of the leakage current during the continuous boosting process, and the stability of the leakage current when th...Read more -
How to use the ground resistance tester
Grounding resistance is a device that is often used in power industry testing, so how to operate it correctly? GDCR3000C Grounding Resistance Tester 1. First, check whether the current line, voltage line and ground network line used for the test are open, whether the rust on the ground pi...Read more -
How to judge whether the port of the High Voltage Circuit Breaker Tester is normal
Select [Test]-[Close], there is a real-time status display of 12 fractures below the LCD screen of the high-voltage switch dynamic characteristic tester. The screen shows that under this interface, you can check whether the fracture channel of the instrument is in good condition. If the fracture ...Read more -
Why are transformers divided into oil-type, gas-type and dry-type
what is the difference between oil-type, gas-type and dry-type? In this article, HV Hipot will introduce these three different test transformers for you in detail. Because of the difference in the internal structure of the test transformer, there are three types of test transformers, all of which...Read more