Phase

The major source of mechanical power in a plant is three-phase electricity. Single phase circuits exist and have many low power uses like lighting and general electrical devices like computers and home appliances. Other single phase circuit is for instrument wiring in intrinsically safe circuits. Most plants distribute electricity by a high voltage three-phase system that is frequently used directly on large drives.

There are single phase motors, but they have an upper power limit of approximately 10 HP (7.5 kW) that does not apply to three - phase motors. Actually, in smaller sizes, three-phase electric motors may cost less than single phase motors of comparable size. On the other hand, supplying three-phase power is costly due to increased transformer distribution costs, but reduced capital costs of three-phase motors and flexibility make this option highly feasible.

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Guide to Alternative Fuels

Guide to Alternative Fuels

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