Maintenance

Insulation test (Megado)

For dry or Oil transformers, conductors, Low and medium voltage SWGRs Insulation level test is performed to ensure it meets IEEE - ANSI electrical standards

Low resistance test

Testing of electrical joints and joints to guarantee the correct assembly of our boards and avoid hot spots. It is performed with a low resistance ohmmeter with an AC supply designed to measure DC resistances of milli ohms or micromhos using a maximum test current of 600 amps DC. the resistance of the cables being tested and the resistance of the component being tested.

Transformation ratio test

To ensure that the transformers have the correct windings and the points of polarity and degree of saturation, a portable automatic transformer turns ratio test equipment is available that is used to measure turns ratio, excitation current, phase displacement. , DC resistance and polarity of windings in single-phase and three-phase distribution transformers whether voltage or current and transformers with shunts. The percentage of error will indicate problems in the transformer windings or in the magnetic core circuits.

Thermographic analysis of the transformer

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Physical-chemical analysis of insulating oil

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Dissolved gas chromatography analysis

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