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Apr 29 2026

How to Test the Insulation Resistance of a Transformer

Test preparationDisconnect all connecting wires, loads, and grounding wires on both the high and low voltage sides of the transformer in advance to completely power off and fully discharge the equipment. Clean the dust and oil stains on the surface of the bushing, keep the testing environment dry an

Apr 23 2026

Purpose of Transformer Oil Corrosive Sulfur Tester

1. Core detection functionUsed for qualitative/quantitative detection of corrosive sulfur, free sulfur, and active sulfide content in mineral insulating oils such as transformer oil and instrument transformer oil. According to standards such as SH/T 0304, ASTM D1275, and IEC 62535, by simulating equ

Apr 15 2026

Common Instruments for Transformer Testing and Their Functional Analysis

As the core equipment of the power system, the operational reliability of transformers directly impacts the safety and stability of the power grid. During routine maintenance, handover acceptance, and preventive testing, various professional testing instruments are utilized to conduct comprehensive

Apr 09 2026

How to Detect Transformer Winding Defects

1. DC Resistance TestMeasure the DC resistance of each phase winding using a three-phase DC resistance tester and compare the three-phase imbalance. If the resistance deviation is excessive, the values fluctuate abruptly, or the three-phase difference exceeds the standard, it can be determined that

Apr 02 2026

How to Detect the Aging Degree of a Transformer

1. Judging aging through insulating oil testingConduct dissolved gas chromatography analysis, dielectric loss, breakdown voltage, moisture, and acid value testing on transformer oil. An abnormal increase in acetylene, hydrogen, and total hydrocarbon content in the oil indicates internal overheating

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