Littelfuse, Inc. Industrial Relays 355600

The 355600 is a three-phase voltage monitor designed to protect motors from single-phasing, high and low voltage, phase reversal, and voltage unbalance. It operates on input voltages of 475-600 V ac at 50/60 Hz and features a 470 VA @ 600 V ac pilot duty SPDT relay output. Adjustable trip delay ranges from 2-30 seconds for voltage faults and 2-300 seconds for restart, with voltage unbalance trip setpoint adjustable between 2-8% per NEMA standards. Four diagnostic LEDs indicate overvoltage, undervoltage, voltage unbalance, reverse-phase, and normal conditions. The device has an operating temperature range of -40° to 70 °C, dimensions of 74.42 mm H × 133.86 mm W × 74.93 mm D, and is mounted using #8 screws. It meets UL 508 certification (File #E68520).