is classified into three testing techniques. - Resistance test: sometimes called Polarization Index, PI, is the relationship between the measured resistance at tenth minute, R10, and at first minute, R1.
- Insulation power factor Test: detects the insulation integrity of windings and also determines a power factor of overall insulation including bushings, oil and windings.
- Capacitance test: inspects winding deformation and structure problems such as displaced wedging and supports of winding and core. Its value will be compared to previous ones or factory tests.
is classified into three testing techniques. - Resistance test: sometimes called Polarization Index, PI, is the relationship between the measured resistance at tenth minute, R10, and at first minute, R1. - Insulation power factor Test: detects the insulation integrity of windings and also determines a power factor of overall insulation including bushings, oil and windings. - Capacitance test: inspects winding deformation and structure problems such as displaced wedging and supports of winding and core. Its value will be compared to previous ones or factory tests.
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