Littelfuse, Inc. Monitor - Relay Output 3554005

The 3554005 is a three-phase voltage monitor relay for 380-480 V ac, featuring a 470 VA @ 600 V ac pilot duty DPDT relay output. It includes adjustable trip and restart delay settings, voltage unbalance detection from 2-8%, and four diagnostic LEDs for overvoltage, undervoltage, voltage unbalance, reverse-phase, and normal conditions. The device uses microcontroller technology to protect against single-phasing, high and low voltage, and phase reversal. It operates from -40° to 70 °C, mounts with #8 screws, and measures 74.42 mm H × 133.86 mm W × 74.93 mm D. It complies with UL 508.