W5-TP4V-300-22J
Sipin 3-Wire 3-Phase Angle Controller (SCR Power Regulator); Main Power Voltage: 200-480 Vac; Normal Rated Current: 300 Amps; Auxiliary Power Source Code: 220 Vac; Input Signal Code: 2 to 10 VDC; Buffering Time Code: Adjustable 1 to 22 Seconds.
Technical Datasheet: