Measurement example


Testing Winding Quality with Resistance Measurement

To operate a motor efficiently, it’s necessary to apply a large current. To accommodate such currents, thick windings with low resistance are essential.

 

What can resistance values tell us?

  • Incorrect Wire Thickness
  • Incorrect Number of Turns
  • Winding Shorts

Performance Required for Resistance Measurement

Winding resistance, which is continually falling as technology progresses, can be accurately measured using a resistance meter.

Required Performance

Low-Resistance Measurement
When measuring large windings, where low resistance values are increasingly becoming the norm, values must be managed on the order of 10 μΩ.

Ambient Temperature Correction
It’s essential to perform temperature correction since wire resistance values vary with temperature.

Equipment used:

Resistance meter RM3545

  • High-precision resistance meter with a resolution of 0.01μΩ
  • The RM3545-02 features an available internal
    multiplexer that efficiently measures resistance at multiple points
  • Multiplexer unit Z3003 as an option

Resistance meter RM3548

  • Temperature correction functionality and interval measurement are convenient in temperature rise testing of motors and transformers.
  • The portable form factor is ideal for measuring large motors and transformers.

Multiplexer unit Z3003

Product Video

RM3545

Demo Video

MR3545

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