Category: TESTING OF MATERIALS

Partial Discharge Measurements

Partial Discharge Measurements: Earlier the testing of insulators and other equipment was based on the insulation resistance measurements, dissipation factor measurements and breakdown tests. It was observed that the dissipation factor (tan δ) was voltage dependent and hence became a criterion for the monitoring of the high voltage insulation. In further investigations it was found […]

Schering Bridge Three Terminal Measurement

Schering Bridge Three Terminal Measurement: For two terminal measurements the bridge is grounded at its junction points. The supply transformer, detector, and all the components of the bridge are enclosed in earthed shields. For Schering Bridge Three Terminal Measurement, it is necessary to avoid stray capacitances, for accurate measurements. Hence, a guard circuit and earthing […]

High Voltage Schering Bridge

High Voltage Schering Bridge: In the power frequency range (25 to 100 Hz) High Voltage Schering Bridge is a very versatile and sensitive bridge and is readily suitable for high voltage measurements. The stress dependence of K′ or εr and tan δ can be readily obtained with this bridge. The schematic diagram of the High Voltage […]

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