Technical Guide
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Handheld Partial Discharge Detector Ultrasonic Measurement Method
Using built-in sensors for testing There are two principles for the partial discharge detection of switch cabinets: ultrasonic principle and transient ground voltage (TEV) principle. The ultrasonic sensor and TEV sensor built into this product are specifically used to measure the partial discharg...Read more -
Applications and Key Performance Indicators of Partial Discharge Shielding Rooms
Partial discharge (PD), abbreviated as PD, is the core indicator and precursor signal of insulation degradation in high-voltage electrical equipment. Accurate detection of PD signals is a critical method for assessing the operational condition of equipment insulation and preventing sudden insulat...Read more -
Classification and Installation & Commissioning of SF6 Gas Circuit Breakers
Sulfur hexafluoride gas circuit breaker The properties of SF6 gas The sulfur hexafluoride gas circuit breaker is a new type of high-voltage circuit breaker that uses SF6 gas as both the insulating medium and the arc-extinguishing medium. SF6 gas has a relatively high dielectric strength. Using...Read more -
Classification and selection method for ground grid grounding resistance testers
The grounding system is the core barrier for electrical safety in fields such as power, communication, construction, and industry. The grounding resistance value directly affects the stability of equipment operation and personal safety. Accurately measuring the grounding resistance of the groundi...Read more -
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 -
Principle of Surge Arrester Measurement and Method for Evaluating Test Results Performance
Surge Arrester Measurement Principle To determine whether a zinc oxide surge arrester has aged or become damp, the change in resistive current flowing through the arrester under normal operating voltage is typically observed, specifically by checking whether the resistive leakage current has inc...Read more -
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