HP Generating Set User Manual download pdf (Page 32)

TELEPHONE INFLUENCE FACTOR (TIF) - The telephone influence factor of a synchronous generator is a

measure of the possible effect of harmonics in the generator voltage wave on telephone circuits. TIF is measured

at the generator terminals on open circuit at rated voltage and frequency.

THREE PHASE - Three complete voltage/current sine waves, each of 360 electrical degrees in length, occurring

120 degrees apart. A three phase system may be either 3 wire or 4 wire ( 3 wires and a neutral).

UNINTERRUPTABLE POWER SUPPLY (UPS) - A system designed to provide power

without delay or transients, during any period when the normal power supply is incapable of performing

acceptably.

UNITY POWER FACTOR - A load whose power factor is 1.0 has no reactance's causing the voltage wave to lag

or lead the current wave.

WATT - Unit of electrical power. In DC, it equals the volts times amperes. In AC, it equals the effective volts

times the effective amps times power factor times a constant dependent on the number of phases.

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HP Generating Set User Manual Page 32