The Model 2652 3-Phase Monitor Is Designed to Protect Motors, Pumps, Hvac Equipment, Air Compressors, Etc. , By Sensing Phase Loss, Low Voltage or Phase Reversal. With Correct Power Applied, The DPDT Output Contacts Transfer, and Drop Out When A Fault Condition or Loss Of Power Occurs. An Adjustable Trip Delay Prevents Nuisance Tripping. The Restart Delay Timer Prevents Short Cycling, Which Is Primarily Used With Hvac and Compressor Motors. The DPDT Output Contacts Allow The Model 2652 to Be Used In CO