Much of the equipment in use today is susceptible to damage or service
interruption during poor power-quality events [1.28]. Everyone with
a computer has experienced a computer shutdown and reboot, with a loss
of work resulting. Often, this is caused by poor power quality on the 120-V
line. As we’ll see later, poor power quality also affects the efficiency and operation
of electric devices and other equipment in factories and offices
[1.29–1.30]