Recording of cooling curve on motors

or transformers

  • Measuring range 200 μΩ ... 20 kΩ
  • Resolution up to 1 nΩ (1 . 10-9 Ω)
  • Accuracy ≤ 0.01 % of reading
  • Special current regulation for inductive probes
  • Automatic temperature compensation 

Task

Recording of a winding's cooling curve after long term stress.

Specific requirement

Up to 255 measurement values can be stored in a freely selectable time interval. After completion of the measurement the values are displayed in tabular form respectively can be transmitted to a PC for further data processing.

Solution

By using a RESISTOMAT® 2304, KELVIN test tongs 2386-V001 and a temperature sensor 2392-V001 the first based "cold" winding resistance will be measured at 20 °C. The DUT is operated for several hours with rated load. After disconnecting the DUT power supply, time set is started in RESISTOMAT® 2304 and the KELVIN test tongs are clamped to the DUT. During the cooling process the value pair resistance and time will be recorded at the preset cycle time.

Go to product RESISTOMAT® 2304

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