1. Insulation testInsulation test is one of the most basic tests in transformer testing. Its purpose is to verify whether the insulation quality of the transformer meets the specified standards and requirements. The insulation test of transformers is divided into AC withstand voltage test, DC withstand voltage test, and dielectric…

Low voltage short-circuit impedance measurement is a basic item in conventional testing projects. By comparing the short-circuit impedance values measured before and after the transformer is subjected to short-circuit current impact, the degree of winding deformation can be preliminarily estimated based on the magnitude of its change. The impedance change…

1. Definition and function of power frequency withstand voltage and induced withstand voltagePower frequency withstand voltage refers to the highest voltage value that a transformer can withstand under specific working conditions, which can also be said to be the insulation strength of the transformer. Induced withstand voltage refers to the…

1. Test purpose and reasonsInduced voltage withstand test is an important test that can evaluate the insulation performance and safety reliability of transformers. Due to the fact that transformers themselves come with high-voltage power sources, such as power supply voltage and terminal voltage, there are also certain safety hazards in…

The series resonance test device is a device used to measure the series resonance frequency in a circuit. When conducting series resonance tests, it is necessary to accurately estimate the resonant frequency to ensure the accuracy and effectiveness of the experiment. This article will discuss how to estimate the frequency…

The series resonance test device is a commonly used device in the power system to detect the harmonic impedance of power equipment. In this device, the reactor is an important component that provides inductance and capacitance to achieve resonance. In the series resonance test device, a single reactor and an…

The transformer capacity and no-load load tester is a new type of instrument developed and designed by our company specifically for the problem of poor power users evading basic electricity bills and increasing capacity without authorization. It is a high-precision instrument used for measuring characteristic parameters such as transformer capacity,…

Microcomputer relay protection tester algorithm refers to the algorithm used when testing and evaluating the performance of microcomputer relay protection devices. These algorithms are designed to simulate real power system working conditions and test the correctness, reliability and response speed of microcomputer relay protection devices under various faults and abnormal…

Relay protection is a safety measure in the power system, which can promptly and accurately identify faults in the power system and protect all parts of the power system from losses. The three-phase relay protection tester is a device used to test relay protection equipment.1. Working principleThe three-phase relay protection…

The loop resistance tester is a special instrument used to measure the contact resistance and loop resistance of switch control equipment. In order to ensure the normal operation of the loop resistance tester and the accuracy of the measurement results, routine maintenance is very important. So, for the warranty of…