Digital transformer ratio-meter ADWEL

Model DXR-2000

The Digital Transformer Ratiometer is a lightweight instrument for the precise determination of transformer ratios, polarity, and excitation current.

It is designed for testing distribution transformers at flux densities low enough that the impedance drop resulting from exciting current may be ignored. Accordingly, the voltage ratio obtained will be a precise measure of turns ratio.

Digital Transformer Ratiometer Features
- An important tool for preventive maintenance, transformer production testing and commissioning on all electrical transformers.
- Built-in vector matrix for 3 phase testing - an important feature for diagnostic work
- Accuracy ± 0.05%.
- Measures ratio, polarity and excitation current
- Ratios 2000:1 In 4 ranges
- Direct digital readout of ratio and excitation current
- Electronic ratio calculation
- Portable in sturdy fiberglass case

The ultra precision potential measuring and ratio calculation provides a five digit readout with ± 0.05% accuracy.

Polarity indicator signals relative phasing at all times, while the LCD digital ammeter warns of saturation or shorted turns.

The 3-phase vector switch pack incorporates a convenient push-button switching arrangement which enables the operator to hook up the test lead harness to all terminals of a three-phase transformer in one operation, then proceed to test all phases on every tap setting without interruption or change of leads on terminals. The operator has full control over the test to select or short phases.

Zig-zag transformers, or transformers without an accessible neutral connection, can also be tested with no external shorting.