The star triangle relay ERV-YU is used for automatic switching in star triangle circuits. What previously happened by manually pressing a manual switch can be automated by retrofitting. Technical data: Rated voltage: 230 V AC or 24 V AC/DC. Rated frequency: 50/60 Hz. Power consumption: <6 VA. Operating temperature: -20 °C to 55 °C. Display: LEDs. Connection type: screw terminals. Maximum load: relay contact 5 A/250 V AC. Installation: DIN rail mounting. Operating height: <200 mm. 0 m of line Cross section: max. 1.5 mm²