Winding Resistance Measurement

DESCRIPTION The ETP-3 equipment measures the following for any type of transformer or autotransformer: - Winding resistance value in single or three phases. - Automatic correction of the resistance per phase to a predetermined reference temperature. - Automatic calculus of the compound winding resistance, for different configurations Delta, Star, etc. CHARACTERISTICS - Performs the measurement of each phase, sequentially, without any change in the connection to the transformer, for each tap changer position. - Uses a four wire measuring method. - Automatic magnetization and de-magnetization of the iron core. - Auto range from 1 m© to 1 K© . - The test current range from 5 mA to 20 A is automatically selected. - Automatic calculus of the resistance per phase. - The measured value is not affected by temperature variation or/ and changes in the test current and with immunity to external perturbations and corrected to a reference temperature.