Technical Guide
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Classification, Application and Selection Method of High Current Generators
High current generators are mainly classified based on the type of output current and structural form, with different types corresponding to different application scenarios. I. Classification by Current Type AC High Current Generator Core Features: Outputs a pure 50Hz sinusoidal current with a sm...Read more -
Test Method for Harmonic Braking Coefficient of Relay Protection Calibration Instrument
Harmonic braking coefficient verification (for transformer differential protection) test wiring Connection method 1 (Applying current to both high and low voltage sides simultaneously): The microcomputer relay protection calibration instrument IA is connected to the A phase on the high-voltage ...Read more -
Safety Technical Measures and Precautions for Transformer Tests
Safety Technical Measures and Precautions for Transformer Tests The personnel participating in the commissioning must be familiar with the performance, technical data and technical standards of the transformer. The commissioning personnel must be certified to work. Personnel participating in the...Read more -
Safety Precautions for On-Site Measurement of Transformer Insulation Resistance in Summer
The insulation resistance value of the transformer is evaluated based on the resistance value at 1 minute. The insulation resistance of the coil at 20℃ should not be less than 2000 MΩ. The insulation resistance of the core should not be less than 200 MΩ. If it is lower than the above requirements...Read more -
Test Procedures for Insulation Resistance, Absorption Ratio and Polarization Index
Insulation resistance, absorption ratio and polarization index test: Generally, manual voltmeters, electric voltmeters, and digital voltmeters are selected. The basic principle of the megohmmeter, whether it is an analog type or a digital type, is based on the same principle, that is, the curren...Read more -
Standardized Test Solution for Cable Cross-Interconnection System
Cross-linked system Measurement purpose Check the ability of the cable outer sheath, the outer sheath of the insulation joint and the insulation clamp to withstand the specified voltage: Check the performance of the nonlinear resistance type sheath overvoltage protector to ensure that the metal ...Read more -
Precautions in DC withstand voltage test and DC leakage test
DC withstand voltage test and DC leakage test (1) Methods of DC withstand voltage test and DC leakage test DC withstand voltage test: The test voltage is generally divided into 2 to 5 sections, with each section’s amplitude being as equal as possible. During the voltage increase process, ...Read more -
Transformer Load Loss and Short-Circuit Impedance Measurement Procedures and Methods
Transformer load loss and short-circuit impedance measurement are routine tests for transformers. The purpose of the load test conducted by the manufacturer is to measure the load loss and short-circuit impedance of the transformer. It is to determine whether these two important performance param...Read more -
Application Scope and Selection of 0.1Hz Ultra-Low Frequency High Voltage Generator
The 0.1Hz ultra-low frequency high-voltage generator is an instrument specifically designed for insulation withstand voltage tests of power equipment, especially suitable for large-capacitance devices such as power cables and large generators. This device replaces the traditional 50Hz power frequ...Read more -
Main Functions and Usage of Switch Mechanical Characteristic Tester
The switch mechanical characteristic tester is a high-precision specialized instrument used for testing the mechanical dynamic characteristics of high-voltage circuit breakers. It is of great significance in the power system. The performance of the circuit breaker directly affects the safe operat...Read more -
Transformer off-line partial discharge detection methods and test equipment
Overall Composition of the Detection System To conduct off-line partial discharge detection on transformers, a complete high-voltage test circuit needs to be set up. According to the detection functions and principles, the instruments and equipment are divided into two categories: the pulse curre...Read more -
The application scope of different types of insulation resistance testers
The insulation resistance of all electrical devices and equipment must comply with the requirements of relevant norms and standards to ensure safety during on-site operation. Whether it is electrical cables, sectional protection equipment, or motors, generators, etc., the electrical conductor par...Read more