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A transformer insulation resistance tester is an important diagnostic instrument used to evaluate the insulation condition of power transformers and distribution transformers. Transformer insulation resistance measurements help maintenance engineers assess insulation performance between transformer windings and between windings and earth.
By applying a selected DC test voltage and measuring the corresponding insulation resistance, the instrument provides valuable information for transformer commissioning, routine inspection, preventive maintenance, and troubleshooting.
Advanced models may support timed resistance measurements, Polarization Index (PI), Dielectric Absorption Ratio (DAR), and automatic data recording to provide additional information for insulation condition assessment. The tester is suitable for transformer manufacturers, power utilities, transformer maintenance companies, and electrical testing laboratories.
It helps assess insulation condition and identify potential problems associated with moisture, contamination, or insulation deterioration.
Common measurements include insulation resistance between high-voltage windings, low-voltage windings, and earth, according to the transformer test procedure.
They provide time-based insulation resistance ratios that can offer additional information about insulation condition.
Yes. It can be used for suitable transformer manufacturing inspections and quality control procedures.
Digital insulation resistance tester (high voltage megohmmeter) with digital display and test leads for electrical equipment insulation testing and maintenance.
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