Tettex Instruments 2293 Winding Resistance Meter

Tettex Instruments 2293 Winding Resistance Meter
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The 2293 incorporates a fast and highly advanced procedure to measure winding resistance. A simple one-time-connection system together with the simultaneous winding magnetization method drastically reduces measuring time.

The simultaneous winding magnetization (SWM) method guarantees fast and reliable measurements even on large power transformers with delta windings on the low voltage side, where stable measurements can be seldom reached using traditional winding resistance measurement instruments.

In addition, the new demagnetization function eliminates the magnetic remanence in the core after the application of a DC voltage. This feature can be used before performing other tests such as frequency response analysis (FRA), transformer turns ratio measurement (TTR) or recovery voltage measurement (RVM) which are adversely affected by remanence effects.


  • Resistance measurement made easy – simple one-time-connection system: Once connected will test all phases and windings
  • Large 7" touch screen interface with full graphical test visualization
  • Unique simultaneous winding magnetization method (SWM), equivalent to traditional equipment with up to 100 A test current
  • Tap changer control signal
  • Heat run function and 6 temperature measurement channels with automatic resistance value correction
  • Data transfer over USB memory-stick or direct to PC


Resistance measurement and demagnetization function for all types of highly inductive test objects.

  • Power transformers
  • Distribution transformers
  • Generators and motors
  • Instrument transformers


Resistance Measurement
Max. Measuring Current 32 A (user selectable)
Max. Charging Voltage 100 V
Range 0.1 μΩ … 300 kΩ
Resistance Accuracy
0.1 μΩ ... 300 μΩ 0.1% ± 0.5 μΩ
300.1 μω … 30 kΩ 0.1%
30.01 kΩ … 300 kΩ 1%
Mains Power Supply
Voltage 90 VAC … 264 VAC
Maximum Power 1 kW
Frequency 47 Hz … 63 Hz
Operating temperature -10°C … +60°C
Storage temperature -20°C ... +70°C
Humidity 5% … 90% r.h. non-condensing
Dimensions (W x D x H) 521 mm x 425 mm x 216 mm
Weight 17.8 kg