METHOD FOR MEASURING SHORT-CIRCUIT INDUCTANCE OF TRANSFORMER FOR FLAW INSPECTION OF WINDINGS

摘要

electrical engineering; flaw inspection of transformer windings. SUBSTANCE: proposed method is used in checking transformers for transient stability at short circuits as one of special means to prevent accidents during transformer operation occurred due to their insufficient stability to short circuits. Capacitor pre-charged with dc voltage from low-power source such as rectifier is used as voltage supply, charged capacitor is connected to transformer primary winding, and transient process of decaying periodic current or voltage is recorded; in the process short-circuit inductance Lsh is found from mathematical expression. EFFECT: provision for computer- aided measurement using advanced instrumentation. 3 dwg