The PMP Series Phase Monitor Relays utilize a
microprocessor-based design to provide protection against phase loss, phase
reversal, phase unbalance, undervoltage and overvoltage. The PMPU is a
universal voltage product that works on any three-phase system voltage from
208-480V (a separate 120V version is available). These devices are designed to
be compatible with most Wye or Delta systems with no connection to Neutral
required. PMP Series products protect against unbalanced voltages or single
phasing regardless of any regenerative voltages.
The relay is energized
when the phase sequence and all voltages are correct. Any one of five fault
conditions will de-energize the relay. As standard, reenergization is automatic
upon correction of the fault condition. Manual reset is available if a
momentary N.C. switch is wired to the appropriate terminals. A multi-color LED
indicates normal condition and also provides specific fault indication to
simplify troubleshooting.
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relay is energized when the phase sequence and all voltages are correct. Any
one of five fault conditions will de-energize the relay. As standard,
reenergization is automatic upon correction of the fault condition. Manual
reset is available if a momentary N.C. switch is wired to the appropriate
terminals. A multi-color LED indicates normal condition and also provides
specific fault indication to simplify troubleshooting. |
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Features:
- Universal voltage range of 208- 480V on PMPU provides the
flexibility to cover a variety of applications with one unit
- Protects against phase loss, phase reversal, phase
unbalance, undervoltage and overvoltage
- Variety of user-selectable and adjustable settings for
the ultimate in three-phase protection
- Automatic & Manual Reset in Same Unit
- Multi-Color LED indicates normal condition and provides
specific fault indication to simplify troubleshooting
- Compact plug-in case utilizing industry-standard 8 pin
octal socket
- 10A SPDT output contacts
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| Part Number |
Protects Against |
Nominal Voltage (50/60
Hz)
Phase to Phase (Line to Line) |
Wiring Socket |
 PMP120 |
Phase Loss, Phase Reversal, Phase Unbalance,
Undervoltage & Undervoltage |
120V |
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| PMPU |
Phase Loss, Phase Reversal, Phase Unbalance,
Undervoltage & Undervoltage |
208-480V |
| Phase Loss: |
Unit trips on loss of any Phase A, B or C. |
| Phase Reversal: |
Unit trips if rotation (sequence) of the three phases is
anything other than A-B-C. |
| Undervoltage: |
Adjustable from 80-95% of nominal voltage. Unit trips when
the average of all three lines is less than the adjusted set point for a period
longer than the adjustable time delay drop-out. |
| Overvoltage: |
Fixed at 110% of nominal voltage. Unit trips when the average
of all three lines is greater than the fixed set point for a period longer than
the time delay drop-out. |
| Phase Unbalance: |
Adjustable from 2 - 10% unbalance. Unit trips when any one of
the three lines deviates from the average of all three lines by more than the
adjusted set point. There is also a ..Disable.. setting adjustment that will
turn off the Phase Unbalance Protection if nuisance tripping is a problem. |
| Output Contacts: |
SPDT: 10A @ 240V AC/30V DC, 1/2HP @ 240V AC |
| Life: |
Mechanical: 10,000,000 operations, Full Load: 100,000
operations |
| Response Times: |
Power Up & Restart After Fault: 1 - 300 seconds
adjustable
Phase Loss & Reversal 100ms fixed
Phase Unbalance 2
seconds fixed
Undervoltage 0.1 - 20 seconds adjustable
Overvoltage
Fixed Time Based on Inverse Time Curve |
| Hysteresis: |
2-3% |
| Load (Burden): |
Less than 3VA |
| Temperature: |
-28° to 65°C (-18° to 149°F) |
| Mounting: |
Uses an 8 pin octal socket. Requires a 600V-rated socket when
used on system voltages greater than 300V (Macromatic Product Number 70169-D
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| Reset: |
As standard, reset is automatic upon correction of fault.
When a momentary-contact N.C. switch is wired across the Manual Reset terminals
(6 & 7), the unit switches to manual reset mode and remote manual reset is
available. |
| LED Status |
Inicator |
| Green Steady |
Normal / Relay ON |
| Green Flashing |
Power Up / Restart Delay |
| Red Steady |
Unbalance |
| Red Flashing |
Undervoltage / Overvoltage |
| Amber Steady |
Reversal |
| Amber Flashing |
Loss |
| Green / Red Alternating |
Undervoltage / Overvoltage Trip Pending |
| Red / Amber Alternating (Applies to 208-480V units only) |
Nominal Voltage Set Error |
