Microprocessor based Automatic Ratio Meter is the first automatic ratio meter in the country giving digital display of ratio directly. The instrument without any need of balancing precisely & accurately measures the voltage transformation ratio of single phase/3-phase delta or star, without neutral , Zig zag connected transformers, CTs & PTs, Power Transformers.

Test Voltage : The Instrument provides isolated test AC voltages of 8V,40V,80V, which enable the testing of both power transformers & CTs.

Display : LCD displays the ratio i.e. ratio of high voltage winding to low voltage winding at low flux in the core. Ratio is displayed in 0.8 - 45000 by auto ranging. Principle of operation: This micro-processor based Instrument uses ratio-metric circuit in which the ratio of test specimen is compared with known internal standard.

Protection: Instrument is protected against any wrong connection across the transformer. Fast acting VBO trips in case of stepping up of test voltage.

Keypad & LCD Display : This is provided for displaying keyboard selected parameter, error/warning messages like incorrect connection, accidental step up misconnection, for user friendly functioning etc.