T&D World Magazine

Device Determines Transformer Turns Ratio

Vanguard Instruments Company’s Model ATRT-01 is a second generation microprocessor-based, single-phase, automatic, transformer-turns-ratio tester. AC-powered, the ATRT-01 determines the transformer turns ratio by precisely measuring the voltages across the unloaded transformer windings and then displaying the voltage ratio.

The highest ratio is 0.8 - 15,000. It features a computer interface and displays excitation current and winding polarity. No calibration is required and the tester calculates turn ratios in percentages. It is rugged, portable and easy to use.

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