Transformer ratio testing is one of the routine test items in transformer manufacturing and maintenance processes. The BBC6638 transformer ratio tester adopts modern electronic technology design. The instrument operation is controlled by a single-chip microcomputer. Its large-screen LCD can intuitively display three-phase ratio, error, tap position and other information. The instrument is designed with a longitudinal test function for tap windings, which can automatically determine the tap position and store the corresponding ratio values. This instrument is suitable for ratio testing of transformers with various connection groups including Z-type.
