Surge:
Surge is an increase in voltage in an electrical current that causes damage to electrical equipment. If an electrical current above the rating were to come through a power outlet for more than three nanoseconds this would be considered a surge. Anything less than three nanoseconds is considered a spike.
Spike:
Spike is an increase in the amplitude of a signal for less than three nanoseconds. Anything more is considered a surge. A power spike can damage any electrical component.
Surge protector:
Surge protector is a plug-in device, designed to protect any electrical equipment from surges and spikes. It is also known as a surge suppressor.
Voltage drop:
Voltage drop is decrease in voltage in less than one second. It is also known as brownout, dip, voltage reduction, and voltage sag.
Under voltage:
Under voltage is reduction in voltage for more than one second.
Voltage drop or under voltage damage your electrical equipment like computers. To prevent damage, use UPS.
UPS:
UPS means Uninterruptible Power Supply. It is a device, to provide backup power source in case of a power failure (outage /blackout), brownout, or a surge in power.
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