Technical Guide
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Different test wiring methods for anti-interference frequency-shift dielectric loss testers
Measurement of dielectric loss connection There are two connection methods for dielectric loss measurement: positive connection and reverse connection. The principle connection diagram can be found in the instruction manual. When both poles of the tested item are insulated from the ground (such ...Read more -
Precautions for On-Site Transformer Turns Ratio Tester Testing
Test Precautions The overcurrent fuse is rated at 0.5A. If the test leads are short-circuited or the high and low voltage connections are reversed, the fuse will blow. When the fuse blows, the internal buzzer of the instrument will sound an alarm. Please turn off the device, replace the fuse wit...Read more -
Current Transformer Dielectric Withstand Test Procedure and Standard Requirements
Current transformers are the core equipment in the power system that perform current measurement and relay protection functions. The stability and reliability of their insulation directly determine the safety and stability of the overall power grid operation. The withstand voltage test is a core ...Read more -
Working Principle, Applications, and Test Standards of Dielectric Loss Tester for Oil
I. Instrument Overview The oil dielectric loss tester is a dedicated instrument for evaluating the performance of insulating oil in high-voltage electrical equipment such as transformers, and serves as a critical testing device to ensure the safe and stable operation of power systems. This instr...Read more -
The methods and standard procedures for calibrating the partial discharge detection device
Partial discharge (PD) detection is a core and effective technical means for diagnosing the insulation status of high-voltage power equipment, and is widely used in preventive tests and online monitoring of various high-voltage equipment such as transformers, GIS, power cables, and switch cabinet...Read more -
Five Dimensions for Selecting a Three-Phase Relay Protection Tester
Three-phase relay protection testers come in a wide variety of models and configurations, with significant differences in equipment specifications. Incorrect selection may lead to issues such as testing functions failing to meet on-site requirements or underutilization and waste of equipment reso...Read more -
Significance and Methods of Mechanical Characteristics Testing for High-Voltage Circuit Breakers
The significance of the mechanical characteristic test for high-voltage circuit breakers Ensure the safety and stability performance of the high-voltage circuit breaker. The test results can help the manufacturer identify design and manufacturing flaws, ensuring that the parameters such as the i...Read more -
DC Resistance Tester On-Site Testing Instructions
Operating Instructions 1. Test wiring Connect the red and black test clips of the test lead to the two ends of the device under test; connect the other end of the test lead to the red and black terminals of the DC resistance tester, respectively, according to color. 2. Smart Power Management ...Read more -
The Principle and Application of GIS Ultrasonic Partial Discharge Detection Technology
Technical Principle GIS ultrasonic partial discharge detection technology is a non-contact detection method. It detects the harmonic waves generated by partial discharge within the high-voltage equipment to determine whether there is a partial discharge fault in the electrical equipment. The spe...Read more -
Insulation Test Items and Methods for Voltage Transformers
Insulation Test of Voltage Transformer Types of Voltage Transformers Voltage transformers currently operating in power systems can be classified into three types based on insulation structure: electromagnetic voltage transformers, cascade-type voltage transformers, and capacitive voltage transf...Read more -
The Application of Impact Pressure Resistance Tester in High Voltage Electrical Tests
I. Overview High-voltage power equipment mainly includes power transformers, gas-insulated switchgear (GIS), power cables, etc. During operation, these equipment are subjected to two types of core transient overvoltage impacts: lightning-induced lightning overvoltage caused by lightning strikes, ...Read more -
Common Questions and Answers Regarding the Selection and Configuration of Relay Protection Test Instruments
I. Selection of basic current and voltage phase numbers The configuration of current and voltage phase numbers for the equipment is entirely based on the actual test object and application scenario. The applicable scenarios of different configurations are clearly defined: 1. Three-phase voltage +...Read more