Energize to Trip Process Alarm

In an energize-to-trip design, a single component failure will not shut down the equipment but will allow continued operation with the protective system partially or completely disabled. Facilities which cannot tolerate nuisance shutdowns, and for which a highly reliable de-energize-to-trip shutdown system is not available, may be designed with energize-to-trip protective systems. Documented periodic testing of such a system is essential to assure reliability.