Discussing Quick Measuring of Direct Current Resistance of Transformer's Windings

Large-scale transformer winding is characterized by large inductance and small resistance.The larger the transformer's volume,the larger the time-constant is.Because transient process stays long in measuring direct current resistance of transformers' winding on the spot,charging current is not stabilized and values of resistance measured by equipment is not accurate,which severely disturbs operator's judgment and influences the process of project.In order to quick measurement of direct current resistance,concatenation of transformer's high and low voltage and high-voltage saturable magnetic circuit method are employed on field test so as to improve measurement and promote process of project.