PBO-3P-T: Three Phase Voltage Monitor
Voltage Range:
• 208 to 575VAC, 3Ø
Self-Powered
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SPDT Relay Contacts
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5 Built-In Voltage Selections
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Monitors:
• Over & Under Voltage
• Phase Loss
• Phase Imbalance
• Phase Reversal
Operation
The PBO-3P-T monitors 5 three phase voltages with the tolerances
pre-programmed into the PBO.
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Each time the PBO is powered up, the processor evaluates the line voltage and compares it to the pre-programmed line voltages and tolerances. If the line voltage matches one of the programmed voltages and is within the tolerances, the output relay will be energized and the LED will be green. The PBO will indicate what voltage it is set for by flashing the LED green in a sequence corresponding to the selected voltage. If a voltage fault is detected, the LED will be red and if the phases are reversed, the LED will flash red.
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Specifications
Electrical
Line Voltage: 208, 230, 380, 460 & 575VAC, 3Ø
Frequency: 45 to 65 Hz
Over/Under Voltage: ±15%
Phase Imbalance: Trip: 8%, Reset: 7%
Phase Rotation: A - B - C
Time Delays:
Trip Time: 5 seconds (1 Second @ ±20%, Single Phasing 3Ø line)
Re-Start: 5 Seconds on power up
30 Seconds after fault
Set-Up: Automatic on power up
LED:
Good: Continuous Green
Fault Rotation: Flashing Red (3Ø)
Fault Voltage: Solid Red
Power Consumption: 1VA
Output Rating @ 25°C:
10 Amps @ 120VAC
6 Amps @ 277VAC
1/8 HP @ 120/277VAC
5 Amps @ 20VDC
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Physical
Mounting: Surface or DIN
Termination:
Line Side: 1/4” Push-On Tabs
Control Side: 0.187” Push-On Tabs
Packaging: Epoxy Fill
Weight: 5 Ounces