High Motor Current Causes Concern

Uncover the issues and you can fix the problems effectively and efficiently.

By Thomas Bishop, EASA, for our sister publication Plant Services

The most frequent concern about high current with a three-phase motor is high no-load current. But the broad issue of high no-load current isn’t the only three-phase motor issue to which plants should pay heed: High current with load and lower-than-expected no-load current are potential areas of concern, too. Let’s explore the sources of all of these.

High no-load current: Motor not rewound

One situation in which higher-than-expected no-load current can occur is with reconditioned motors. Although some motors with no-load currents above or below the guidelines shown in Table 1 may still be satisfactory, motors with no-load current outside of these ranges warrant further analysis.

Read the rest of this article from our sister publication Plant Services.

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