Products / Winding Resistance Ohmmeters / Model 1051WR Winding Resistance Ohmmeter, 50A

Model 1051WR Winding Resistance Ohmmeter, 50A

One of the most important tests that can be made to determine the condition of a transformer, is to measure its winding resistance(s). Many defects or faults can be identified by this test including overheated or damaged windings, loose mechanical connections, poorly welded bonds, and issues associated with tap-changing mechanisms. The Model 1051WR has been designed to quickly perform winding resistance measurements with a very high degree of accuracy. Nine ranges of output current provide for a very broad resistance measurement capability.


Details about the Model 1051WR Winding Resistance Ohmmeter, 50A.

Specifications of this Winding Resistance Ohmmeter

Measurement Range: 0 to 20kΩ
Minimum Resolution: 0.01μΩ
Selectable output current: 20mA, 100mA, 200mA,
1A, 2A, 5A, 10A, 20A, 50A, and Automatic Output
Accuracy: 0.2% of reading, ±0.1μΩ
Communications: USB, Dual RS485
Internal Memory: Stores up to 99 data records
Input Power: 120VAC ±10% 60Hz ±1Hz
Operating Environment:
-4°F to 104°F @ ≤80%RH non-condensing


  • Six-inch color touch screen LCD
  • Broad resistance measurement
  • capability (0Ω to20kΩ)
  • Temperature compensated measurements
  • On-board micro-printer and USB interface
  • Dual RS485 communication interfaces
  • Automatic simultaneous six-winding measurements
  • Selectable manual and automatic test profiles
  • Single and three-phase measurement connections
  • Continuous and instantaneously rated output
  • Fixed and automatic current output from 20mA to 50A

Supplied with manual, test cables, power cord, two 10A fuses, printer paper, packing list and warranty card.

Take a look at all our winding resistance ohmmeter options here.

Learn more about ohmmeters and their history on wikipedia here.

Additional information

Weight 32.6 lbs
Dimensions 16.5 × 12.6 × 7.9 in