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Jul 30 2025

Reasons for Partial Discharge Detection in Switchgear

1、 The essence and harm of partial dischargeEarly characterization of concealed insulation defectsPartial discharge occurs inside the insulation system (such as bubbles, impurities, cracks), and non penetrating discharge occurs when the electric field strength exceeds the local breakdown field stre

Jul 23 2025

Why Is It Necessary to Test the Kinematic Viscosity of Petroleum

1、 Ensure product performance and equipment safetyLiquidity control and transportation efficiencyThe fluidity of petroleum products directly affects pumping, pipeline transportation, and atomization effects. Excessive viscosity can lead to increased transportation resistance, increased energy consu

Jul 16 2025

Why Do Transformers Need to Undergo Factory Testing

1、 Quality assurance and defect investigationIdentification of process and material defectsThrough routine tests such as DC resistance measurement and transformation ratio testing, problems such as winding breakage, inter turn short circuit, poor welding, and inconsistent wire specifications can be

Jul 02 2025

Test Theory of Insulation Resistance Tester

The testing principle of insulation resistance tester (also known as megohmmeter, shake meter) is based on Ohm's law (R=V/I), which calculates the resistance value of insulation material by applying DC high voltage and measuring leakage current, in order to evaluate its insulation performance. T

Jun 25 2025

The Necessity of Conducting Capacity Testing on Transformers

1、 Ensure the safety and reliable operation of equipmentPrevent overload riskAccurately measuring the actual capacity of a transformer can avoid its long-term overload operation. Overload can cause abnormal temperature rise in the winding, accelerate insulation aging, and even lead to fire or explo

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