Littelfuse 455 3-Phase Line-Load Volt Mon/ 19

The Littelfuse 455 is a three-phase voltage monitor intended primarily to protect motors in HVAC equipment. It makes sure that the motor runs within safe voltage ranges by continuously monitoring the line and load side voltages. The 455 stops the motor or sounds an alarm when the voltage goes above predetermined levels either high or low to avoid damage. It differs from standard monitors in that it can monitor two things at once and provides complete protection even before the motor starts. Usually found in control panels of motor-driven HVAC systems like chillers and air handling units, the 455 protects against a range of voltage problems, including brownouts, power surges, and phase imbalances. Its ease of installation and small size make it a popular option for both new and old equipment.