Motor Protection Pitfalls

Motor Protection Pitfalls

Limitations of residual ground-fault elements in medium-voltage motor protection schemes

Medium-voltage motors are critical to a facility’s power system. Not only are they expensive, but their failure can have crippling, long-lasting impacts on a plant’s operation. As such, properly protecting these motors is of great importance. Many devices exist to help accomplish this task, but protective relaying is a primary contributor. Through connections to instrument transformers, discrete indicating devices, and even resistance temperature detectors (RTDs), relaying can provide s

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