Putting Corona-Resistant Stator Slot RTDs to the Test

The ability of a motor’s stator slot Resistance Temperature Detectors (RTDs) to withstand the effect of corona has become critically important. Stator RTD erosion of the insulation material either at the surface or internally could cause a leakage path to the internal element. Further discharge could eventually destroy the sensing element or leak stray voltages to the lead wires connecting to monitoring instrumentation.

That’s why we put our corona-resistant stator RTD designs to the test against stator sensors made of conventional materials and construction methods. We found that corona-resistance RTDs assure a greater margin of protection to the temperature monitoring and motor protection system throughout the life of a motor in a variable frequency environment.

Our new whitepaper explains it all:

In this free whitepaper, we share the results of our:

  • Corona inception voltage test to determine the CIV of five stator RTDs
  • Long term voltage test to subject 8 RTDs to increased voltage
  • Other life testing with an outside lab that tested different stator RTD constructions


Ready to take the next step and explore powerful design innovation?
Minco engineers are ready. Our thermal, flex circuit and sensing experts can help your team find a better way — minimizing costs, while improving overall system performance


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