Three-Phase Monitor Relays & Phase Converters

Three-Phase Monitor Relays


Are there any issues with using a three-phase monitor relay on a system that is using a phase converter to get a third leg on a 240V system?


There are two important items to watch out for in this application. STATIC phase converters are not truly providing 3 phase power and are not recommended for use with any phase monitoring products. Rotary converters, in most cases, should work fine as long as steps are taken to safely bypass the phase monitor contacts during startup. This is necessary as voltage and frequency are not within acceptable parameters during this time.