ATC Diversified Products

SLU Series

Universal Phase
Monitor/Relay

PROTECTS AGAINST

  • Phase Loss

  • Phase Reversal

  • Over/Under Voltage

  • Phase Unbalance

The Line to Line voltage adjustment is set to the appropriate nominal voltage and frequency scale (there is infinite set point resolution between minimum and maximum on each scale).With normal operating voltage present on all three phases in the proper sequence, the internal relay will energize (Pick-up). When an incorrect phase sequence, phase loss, under voltage, over voltage, frequency shift or unbalance condition occurs greater than the settings, the internal relay will de-energize (Drop-out). When all conditions return to normal, the relay will energize when the adjustable Restart Delay has expired.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

FEATURES

  • Over/Under Voltage

  • Phase Unbalance Phase Loss

  • Phase Shift Detection

  • Phase Reversal

  • Adjustable Restart Delay

  • 8 Pin Plug-In

  • Adjustable Fault Delay

  • Automatic or Manual Reset

  • Operating Ranges: 200-500VAC 3Ø

 
 

Specifications
Auto Ranging Scales: See "Auto Ranging Scales" Table Below
Voltage Band
..Drop-out:
..Pick-up:
±10% of Range Setting (Under/Over)
±7% of Range Setting (Under/Over)
Maximum Voltage: 550VAC (Line-to-Line)
Phase Sequence: ABC (Will Not Operate On CBA Sequence)
Power Required: 90VA Maximum
Phase Unbalance: 2% to 10%, Adjustable Drop-out
Phase Shift 13° Drop-out, 12° Pick-up (Ø-Loss)
Frequency Shift
..Drop-out:
..Pick up:		 50/60 Hz
± 4%
± 3%
Response Times
..Power Up:
..Fault Delay:
..Severe Fault:
..Restart:
2.5 S Minimum
0.1 to 25 S, Adjustable
100mS (Phase-Loss, Unbalance or Phase Reversal)
0.5 to 300 S, Adjustable (Automatic Reset)
Reset: Automatic or Manual Mode
Hysteresis: 10% of Setting
Relay Output: SPDT, 10A @ 240VAC Resistive, 1/2 HP @ 240VAC
Indicators
..Normal (Green LED):
..Fault (Red LED):		 Flashing
..Fault Delay Active
..Restart Delay Active		 Continuous
..Relay Energized
..Relay De-energized
Temperatures
..Operate:
..Storage:
0°C to +55°C
-45°C to +85°C
Repeat Accuracy: 1% @ Fixed Condition
Enclosure: Style "A" LEXAN® Dust Cover
 

AUTO RANGING SCALES
Frequency Nominal Line-Line
Voltages		 Adjustable
Range
60Hz 208, 220, 240, 200-250
60Hz 380, 415, 440, 460, 480 360-500
50Hz 208, 220, 240, 200-250
50Hz 346, 380, 415, 330-430