The Littelfuse SymCom Model L6400 is a robust 3-phase voltage monitor relay engineered to safeguard industrial machinery and motors from critical power supply irregularities. This genuine OEM component continuously monitors for detrimental conditions such as voltage unbalance, phase loss, phase reversal, undervoltage, and overvoltage. Featuring adjustable trip points and time delays, the L6400 relay ensures precise control and prevents costly damage to valuable equipment. Its versatile design allows for both surface and DIN rail mounting, making it suitable for a wide array of industrial control panel applications requiring reliable 3-phase power monitoring.