An interruption is the complete loss of supply voltage or load current, lasting from 0.5 to 30 cycles (instantaneous), 30 cycles to 2 seconds (momentary), 2 seconds to 2 minutes (temporary) or over 2 minutes (sustained) Fig 1. Based on the standard IEEE-1250
One common example of an interruption is when all electronic devices and lights go out in a house for short period of time. While inconvenient in a home, a similar power loss in a business setting can be costly, as data can become corrupt or be lost entirely during the interruption.
Some causes of interruption are equipment failures, control malfunction, and blown fuse or breaker opening
