4. AC motor protection
4.1 High-power asynchronous motors
The high-power induction motors considered in this article are motors with a power rating of more than a few hundred kilowatts. This threshold, which defines the choice of a protection system, is not absolute. It depends on the importance attached to the motor-driven auxiliary equipment in the industrial process.
It is common for such motors to be supplied with high-voltage HTA from 3 to 6.6 kV, or even higher. The associated disconnecting device may be a fuse, combined with a three-pole contactor, or a circuit-breaker ...
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AC motor protection
Technology and implementation
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References
General texts
- (1) - CIGRE WG 01 DU CE 34 - Harmonisation of protection policies for power stations and generators and protection policies for HV networks (Harmonisation des politiques de protection pour les centrales et les alternateurs et des politiques de protection des réseaux HT). - 44 p. 2 tabl. 2 fig. (1983).
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