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Installation and Connection
1.
Mount the microprocessor-controlled phase monitor in, on or near the control panel. If
the location is wet or dusty, mount the device inside a NEMA-4 or NEMA-12 enclosure.
Note: The phase monitor has four mounting holes that measure approximately 3 mm
(0.125") in diameter and 7 mm (0.25") in depth. Apply a maximum of 2.25 Newton-
meters (20 inch-pounds) of torque to the fasteners (purchased separately) when
mounting the phase monitor.
2.
Use a voltmeter to determine the nominal voltage on the circuit. Set the Voltage
Adjustment to the corresponding voltage level.
3.
Use a phase sequence indicator to determine the A, B and C phases.
4.
Shut off and lock out power.
5.
Set up the phase monitor as follows:
a) Set the Mode Selector to Auto/Reset.
b) Set the Time Delay to the shortest time delay setting.
c) Connect the power circuit to the phase monitor's Input Contacts: Connect phase A
to Input Terminal 1, phase B to Input Terminal 3, and phase C to Input Terminal 5.
• For WYE (Y) electrical systems, connections to neutral are not required.
• Do not connect the outputs until Step 8.
6.
Apply power. The microprocessor will begin to monitor the power provided by the input
circuit. The red LEDs will flash in sequence.
• If all of the red LEDs stop flashing and the green LED begins flashing, the power
provided by the circuit is within specified tolerances. The green LED will flash for the
duration of the selected time delay. Then it will stop flashing and remain on.
• If one red LED remains illuminated, see Fault Indicators and Troubleshooting.
7.
After clearing any faults, shut off and lock out power.
8.
Use the wiring diagrams provided on the unit to connect the equipment control or
alarm to the phase monitor's Output Terminals. Typically the equipment control is
connected to the NO contacts while an alarm is connected to the NC contacts.
9.
Set the Time Delay Adjustment and Mode Selector to the preferred settings.
10. Apply power.
MPM-120/230/380/440/575
9
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