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This article is written like a personal reflection or opinion essay that states a Wikipedia editor’s personal feelings about a topic. Please help improve it by rewriting it in an encyclopedic style. A three-phase induction motor can be run at two-thirds of its rated horsepower on single-phase power applied to any pair of legs, once spun up by some means.
L3, although without some form of current injection, special windings in the idler, or other means the voltage will sag when a load is applied. Power factor correction is a very important consideration when building or choosing an RPC.
This is desirable because an RPC that has power factor correction will consume less current from the single-phase service supplying power to the phase converter and its loads. Balanced voltage between the three legs of power is important for operational life of the equipment receiving that power. Unbalanced three-phase power can damage the equipment that it is meant to operate. These systems used serial traction motors.