Technical
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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 -
Precautions for insulating oil dielectric strength tester
GD6100D precision oil dielectric loss automatic tester is an integrated insulating oil dielectric loss factor and DC resistivity tester developed according to the national standard GB/T5654-2007 “Measurement of Relative Permittivity, Dielectric Loss Factor and DC Resistivity of Liquid Insul...Read more -
The important role of phase detector in electric power system
The high-voltage wireless phase nuclear detector has strong anti-interference performance, meets the requirements of (EMC) standards, and is suitable for various electromagnetic field interference occasions. The measured high-voltage phase signal is taken out by the collector, processed and sent ...Read more -
Common technical problems of Current transformer tester
Current Transformer Characteristic Comprehensive Tester, also known as CT/PT Analyzer, is a multi-functional on-site testing instrument specially designed for relay protection professional testing of current transformer volt-ampere characteristics, transformation ratio testing and polarity discri...Read more -
How to deal with the error of current transformer?
The secondary load of the current transformer directly affects its correct operation. Generally speaking, the greater the secondary load, the greater the error of the transformer. As long as the secondary load does not exceed the manufacturer’s setting value, the manufacturer should ensure ...Read more -
Precautions for Sampling of Chromatographic Analyzer
The accuracy of test results and the correctness of judgment conclusions depend on the representativeness of the samples taken. Unrepresentative sampling not only causes waste of manpower, material resources and time, but also leads to wrong conclusions and greater losses. For oil samples with sp...Read more -
Advantages of Zinc Oxide Arresters
The basic structure of the zinc oxide arrester is the valve plate. The zinc oxide valve is insulated under the operating voltage, and the passing current is very small, generally 10~15μA, and the nonlinear characteristics of the zinc oxide valve are mainly formed by the grain boundary layer. Its ...Read more -
Test procedures to be followed when performing partial discharge tests
During the AC test voltage, the commonly used partial discharge measurement procedure is as follows: (1) Sample pretreatment Before the test, the sample should be pretreated according to the relevant regulations: 1. Keep the surface of the test product clean and dry to prevent local squares cause...Read more