General Terms:

kVA: Unit of apparent power

kW: Unit of real power

Hz: Unit of frequency (usually 50 or 60)

PF (Power Factor): Ratio of kW to kVA

V (Volt): Unit of voltage

A (Ampere): Unit of current

Power Types:

Prime Power: Continuous rated power

Standby Power: Emergency power (max 200 hours/year)

Continuous Power: Continuous power (similar to Prime)

Technical Terms:

Derating: Power reduction due to environmental conditions

ATS: Automatic Transfer Switch

AVR: Automatic Voltage Regulator

Governor: Engine speed control system

Turbocharger: Forced induction device

Intercooler: Compressed air cooler

Engine Terms:

Bore: Cylinder diameter

Stroke: Piston travel distance

Displacement: Engine volume

Compression Ratio: Compression ratio

RPM: Revolutions per minute