3 Phase SPDT Adjustable Trip & Restart Voltage Monitor (380-480V)

The 355 is a 3-phase voltage monitor with adjustable trip and restart delay, adjustable voltage unbalance and multiple diagnostic lights. It is perfect for heavy-duty applications that need both protection and simple user-friendly diagnostics. Applications include pump panels, commercial HVAC, oil rigs and others.
The 355 uses microcontroller technology to monitor incoming voltage and de-energize its output relay if power problems exist. The 355 can protect motors from damage caused by single-phasing, high and low voltage, phase reversal and voltage unbalance. It has four diagnostic LEDs that clearly show overvoltage, undervoltage, voltage unbalance, reverse-phase and normal conditions.
The 355-400 is equipped with a 470VA @ 600VAC pilot duty SPDT relay.

Features:

• Input Voltage (V): 380 to 480VAC
• Maximum Input Power: 6W
• Input AC Line Frequency (Hz): 50/60Hz (50Hz will increase all delay timers by 20%.)
• Output Form: SPDT
• Output Load Rating (VA): Pilot Duty: 470VA @ 600VAC; General Purpose: 10A
• Restart Delay Range: After a Fault or power loss: Manual 2 - 300s adjustable
• Repeat Accuracy (%): ±0.1%
• Trip Delay Range: Under/Over Voltage and Unbalance: 2 - 30s adjustable; Single-phasing Faults (>25%UB): 2s
• Trip Point Accuracy (%): ±1%
• Overvoltage Trip Voltage (%): 110%
• Overvoltage Reset Voltage (%): 107%
• Undervoltage Trip Voltage: 90%
• Undervoltage Reset Voltage (%): 93%
• Voltage Unbalance Trip Point (%): 2-8% adjustable
• Voltage Unbalance Reset (%): Trip setting minus 1%
• Termination Type: Torque: 7in-lbs; Wire Size: 12-18AWG
• Mounting Method: #8 screws
• Operating Temperature: -40° to 70°C (-40° to 158°F)
• Storage Temperature (F/C): -40° to 80°C (-40° to 176°F)
• Dimensions: 2.93 in H x 5.27 in W x 2.95 in D (74.4 x 133.9 x 74.9 mm)