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Volt-Ampere (VA)

Voltage (V) multiplied by the current (ampere); apparent power.

Voltage spike

Transient (short term) over-voltage i.e. spike or peak: Causes wear or acute damage to electronic equipment.

Voltage sag

Transient (short term) under-voltage: Causes flickering of lights.

Volt (V)

The unit of measure for voltage.