Littelfuse 201A-AU Monitor 319848-301 ensuring it communicates correctly with

ensuring it communicates correctly with the system control board out of the box

Technicians typically look for humming sounds without rotation

it's a critical calibration tool for your next tune-up

The rotolock connections

Littelfuse 201A-AU Monitor 319848-301 ensuring it communicates correctly withThe Littelfuse 201A AU is a critical 3 phase voltage monitor engineered to safeguard motors from catastrophic power line faults. This auto ranging motor protection relay operates within a wide 190480 V AC window at 50 60 Hz, making it a standard choice for HVACR contractors managing various system sizes. Using proprietary microcontroller based circuitry, the unit provides continuous phase loss protection, voltage unbalance detection, and monitoring