12.0208 Phasing failure and protection.

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Delivery of single-phase power to a 3-phase motor is possible at any time on any system. Most of the load on the utility’s system is single-phase; therefore the system is protected by single-phase reclosers. To properly protect 3-phase motors from overload, motor starters that have 3 thermal elements should be used.

History: Rule 4-80. eff 1 Apr 80, Single Phasing.