SYMCOM 3-Phase Voltage Monitor w/OT08PC

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  • Manufacturer: Littelfuse
  • Product Family: SYMCOM
  • Product Type: Voltage Monitor
  • Frequency: 50/60Hz
  • Input Voltage: 475-600VAC
  • Max Operating Temperature: 158 F
  • Min Operating Temperature: -40 F
  • Mounting Method: DIN Rail or Surface Mount
  • Output Form: SPDT
  • Output Load Rating: 10A @ 240VAC
  • Output Load Rating Pilot Duty: 480VA @ 240VAC
  • Overvoltage Reset Voltage: 107%
  • Overvoltage Trip Voltage: 110%
  • Restart Delay Range: Manual 1-500s adj
  • Trip Delay Range: Over/Under/Unbalanced 1-30s adj; single-phasing faults 1s fixed
  • Trip Point Accuracy: +/-1%
  • Undervoltage Reset Voltage: 93%
  • Undervoltage Trip Voltage: 90%
  • Voltage Unbalance Reset: Trip setting minus 1% (5-8%) or Trip setting minus 0.5% (2-4%)
  • Voltage Unbalance Trip Point: 2-8% adj
SYMCOM 201A AU Series 3-Phase Voltage Monitor w/OT08PC Socket, auto-sensing voltage range, adjustable trip & restart delay settings, 475-600 VAC 50/60Hz, SPDT, 5W, 480VA @ 240VAC pilot duty, 10A @ 240VAC gen purpose, DIN rail or surf mount, LED indicator.

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Product Description

The 201A-AU is a 3-phase, auto-ranging, dual-range voltage monitor that protects 190-480VAC, 50/60Hz motors regardless of size. Has user adjustable 1-30 second trip delay, manual or 1-500 second restart delay, and 2-8% voltage unbalance trip point.

The product also provides a user selectable nominal voltage setpoint and the voltage monitor automatically selects between the 200V and 400V range. The Model 201A-AU includes advanced single LED diagnostics, where five different light patterns distinguish between faults and normal conditions.

This unique microcontroller-based voltage and phase-sensing device constantly monitors the 3-phase voltages to detect harmful power line conditions. When a harmful condition is detected, the 201A-AU's output relay is deactivated after a specified trip delay. The output relay reactivates after power line conditions return to acceptable levels.