Power Quality

Swell or Overvoltage

Description

An increase in voltage

Duration

Milliseconds to a few seconds
Overvoltages are Swells that are longer than a few seconds

Causes

Major equipment start-up or shutdown
Short circuits (fault clearing)
Undersized electrical circuit

Effect

Memory loss or data errors
Dim or bright lights
Shrinking display screens
Equipment shutdown

Possible Solutions

Relocate computer to a different electrical circuit
Voltage regulator
Power conditioner
Uninterruptible power supply
Motor Generator