New for 2026
TWR250B
Turns Ratio & Winding Resistance Analyzer
Connect once to all transformer windings and run every winding test from a 10.1-inch touchscreen. The new DV Power TWR250B replaces two cases of equipment with one battery-powered instrument built for the outage window.
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The setup time comes back
One three-phase connection to all transformer terminals. No lead swaps between turns ratio and winding resistance, no second setup, no reconnection errors that force retests.
Every test, automated
One three-phase connection to all transformer terminals. No lead swaps between turns ratio and winding resistance, no second setup, no reconnection errors that force retests.
Built for the field
One three-phase connection to all transformer terminals. No lead swaps between turns ratio and winding resistance, no second setup, no reconnection errors that force retests.
See it on your transformer
ProgUSA is the U.S. distributor for DV Power. We've supplied test equipment to utilities, NETA testing companies, and industrial customers since 2005, with domestic support, calibration coordination, and hands-on training.
Request a demo and we'll bring the TWR250B to you, or walk your team through it live.
Equipment + Education + Service = Partnership