The Crompton Instruments 252-PHOU Protector Relay is a protective relay designed for electrical protection schemes, delivering protective switching in response to monitored conditions. It operates on 120 VAC at 60 Hz and has contact outputs rated for up to 250 VAC at 50/60 Hz. The 252-PHOU designation identifies this unit within Crompton Instruments’ protector relay lineup, making it suitable for integration into control panels and protection installations that require reliable, standard-frequency signaling and switching.
