3-phase variable transformers are essential to both manufacturers and end users. Electrical testing for transformers and motors includes testing for ratio, winding resistance, tap changer, excitation current, short circuit impedance, and more. A 3-phase variable transformer allows you to monitor performance of a transformer or motor and address any necessary maintenance immediately, which saves time and money down the line that would have been spent on costly, arduous repairs or replacements. Advanced Test Equipment Rentals carries variable transformer and motor testing sets that enable you monitor the health of a transformer and perform AC and DC motor tests. Verify proper voltage output of your 3-phase transformer and motor, and prevent corrosion and breakdowns.