Motor Protection Principles.pdf
Motor Protection Principles.pdf
Motor Protection Principles.pdf
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Thermal Model - <strong>Motor</strong> Cooling<br />
• <strong>Motor</strong> cooling is characterized by separate cooling time constants<br />
(CTC) for running and stopped motor states. Typical ratio of the<br />
stopped to running CTC is 2/1<br />
• It takes the motor typically 5 time constants to cool.<br />
Thermal Model Cooling <strong>Motor</strong> Tripped<br />
Thermal Model Cooling100% load - Running<br />
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