TELE Controls Inc. Monitor - Relay Output E1YM480Y/277VS10

The E1YM480Y/277VS10 is a multifunction voltage monitoring relay for 3-phase AC mains, detecting undervoltage, overvoltage, phase failure, and phase sequence with a selectable window function. It features a single changeover contact rated for 250V AC and 1250VA, mounted on a 17.5 mm wide DIN rail. It operates from 480/277V AC at 48-63 Hz, consuming 16VA at 480V/60Hz. The device includes red and yellow LEDs for failure and relay status indication, meets overvoltage category III with a 4 kV surge rating, and complies with IP40 housing and IP20 terminal protection. Operating temperature ranges from -25°C to +55°C, with storage from -25°C to +70°C. Mechanical life is 20 million operations; electrical life is 200,000 at 1000VA resistive load. It complies with IEC 60664-1 and IEC 60947-5-1.