Measuring Winding Resistance

Check for wire breaks by measuring winding resistance with a high level of precision.
Check for incorrect wire thickness and turn count by using a high-precision resistance meter to make the measurements.

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
Motor Windings
Transformer Winding
Coil Winding

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

RESISTANCE METERRM3545

・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.

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MULTIPLEXER UNIT Z3003

MULTIPLEXER UNITZ3003

RESISTANCE METER RM3548

RESISTANCE METERRM3548

・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.

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You can download a catalog that summarizes the applications introduced on the special site.

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