Technical
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Precautions for Series Resonance Test System
Precautions for Series Resonance Test Syetem 1. During the test, the test phase is connected to the high-voltage source, and the high-voltage lead wire needs to use a special halo-free lead wire, and the non-test phase is grounded with the GIS shell; 2. The test must ensure that the SF6 gas in ea...Read more -
How to effectively prevent overvoltage problems during substation operation
In the process of operating the no-load transformer, there will be an unavoidable physical phenomenon, that is, cut-off. The problem of operating overvoltage due to the cut-off of the circuit breaker can be prevented by taking the following measures: 1. Improve the iron core Improving the iron co...Read more -
How to measure the dielectric loss of transformer
First of all, we can understand that the dielectric loss is that the dielectric is under the action of an electric field. Because of the internal heating, it will convert electrical energy into heat energy and consume it. This part of the consumed energy is called dielectric loss. Dielectric loss...Read more -
The difference between the DC withstand voltage test device and the AC withstand voltage test device
1. Different in nature AC withstand voltage test device: the most effective and direct method to identify the insulation strength of electrical equipment. DC withstand voltage test device: to detect the relatively large peak voltage that the equipment withstands under the high voltage test. 2. Di...Read more -
What are the factors affecting the results of the series resonance test?
Even with the so-called “all-powerful” series resonance, the test results will still be affected by uncertain factors, including: 1. The influence of weather In the case of high humidity, the corona loss of the lead wire increases greatly, and the interference of the surrounding elect...Read more -
How to maintain dry-type test transformer?
Dry-type test transformers mainly rely on air convection cooling equipment. Therefore, it has good heat dissipation performance and excellent environmental usability. Therefore, simple dry-type transformers are generally introduced into every corner of people’s lives with their unique advan...Read more -
What is the primary current generator used for?
The primary current generator is the necessary equipment for the electric power and electrical industry that needs primary current during commissioning. The device has the characteristics of convenient use and maintenance, superior performance, safe and reliable use, beautiful appearance and stru...Read more -
Using Precations for Insulation oil Tan Delta Tester
The recovered unfiltered oil medium is called inferior oil, which contains a lot of water and impurities, and its dielectric strength is mostly below 12KV. Especially for low-quality oil with a lot of water, some users use a high-dielectric strength tester to test it in order to know how bad it i...Read more -
Various wiring methods of earth resistance tester
The measurement methods of the ground resistance tester usually have the following types: two-wire method, three-wire method, four-wire method, single clamp method and double clamp method, each has its own characteristics. In actual measurement, try to choose the correct method to make the measur...Read more -
Calculation of series resonance withstand voltage test
The series resonance withstand voltage test is a test method used to test the structural strength of high pressure vessels. Factors to be considered in the calculation process are: The geometric parameters of the container: including the shape, size, thickness, etc. of the container. Material phy...Read more -
What problems should be paid attention to in measuring absorption ratio polarization index
Conditions for measuring the absorption ratio The absorption ratio and polarization index of the transformer with the voltage class of 10kv and the capacity of the distribution network transformer below 4000kvA can not be measured. When the transformer voltage level is 220kv or above and the capa...Read more -
What tests should be done before and after the circuit breaker switch?
Circuit breakers are divided into oil circuit breakers, air circuit breakers, sulfur hexafluoride circuit breakers and vacuum circuit breakers according to the type of medium. Let’s take a look at the electrical test items to be done before and after the circuit breaker is overhauled. Test ...Read more