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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.
- 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)
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