PMDU Macromatic, PMDU Datasheet
PMDU
Manufacturer Part Number
PMDU
Description
Relay; E-Mech; Phase Monitor; SPDT, SP-NC; Cur-Rtg 10A; Ctrl-V 208-480V; PCB Mnt; SMT
Manufacturer
Macromatic
Datasheet
1.PMDU.pdf
(2 pages)
Specifications of PMDU
Brand/series
PMD Series
Contact Form
SPDT, SP-NC
Current, Rating
10 A
Display Type
LED
Function
Phase Monitor
Mounting Type
SMD
Relay Type
Electro Mechanical
Release Time
1 to 300 Sec.
Standards
cULus, CE
Temperature, Operating
-28 to +65 °C
Termination
SMT
Voltage, Control
480 V
Voltage, Rating
240⁄30 VAC⁄VDC
Universal Voltage
One Unit Works on Any 208-480 V System
Temperature
–28° to +55°C
Lead Free Status / Rohs Status
RoHS Compliant part
PHASE MONITOR RELAYS
Phase Loss, Phase Reversal, Phase
Unbalance, and Under/Over Voltage
PMD Series Surface-Mount
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14
Universal voltage range of
208-480V on PMDU pro-
vides 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 or Manual Reset
Multi-Color LED indicates
normal condition and defines
fault to simplify troubleshoot-
ing
45mm DIN-style surface-
mount case
10A SPDT & SPNC output
contacts
The PMD Series Phase Monitor Relays utilize a microprocessor-based design to provide
protection against phase loss, phase reversal, phase unbalance, undervoltage and
overvoltage. The PMDU is a universal voltage product that works on any three-phase
system voltage from 208-480V (separate 120V & 575V versions are available). These
devices are designed to be compatible with most Wye or Delta systems. In Wye systems,
a connection to a neutral is not required. PMD 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, re-energization 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.
The PMD Series offers a variety of user-adjustable settings. The percent phase unbalance
is adjustable from 2-10%, and also has a “Disable” setting for those applications where
poor voltage conditions could cause nuisance tripping. The undervoltage drop-out can be
set at 80-95% of operating voltage (overvoltage setting is fixed at 110% of nominal). The
adjustable time delay drop-out on undervoltage (0.1-20 seconds) eliminates nuisance
tripping caused by momentary voltage fluctuations. There is also an adjustable time delay
(1-300 seconds) on both power up and restart after a fault has been cleared.
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n See Page 16 for Accessories.
Surface-Mount
MOUNTING
To order PMD units with a second N.O. contact instead of the N.C. (terminals 21-22),
add a suffix “-A1” to the Product Number, i.e., PMDU-A1. To order PMD units with
DPDT output contacts instead of one SPDT and one SPNC, but with no manual reset
feature, add a suffix “-A2” to the Product Number, i.e., PMDU-A2.
STYLE
OPERATING
VOLTAGE
208-480V
50/60 Hz
120V
575V
PRODUCT
NUMBER
PMD120
PMDU
PMD600
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WIRING n
DIAGRAM 105
Revised: 11/07
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PMDU Summary of contents
Page 1
... To order PMD units with a second N.O. contact instead of the N.C. (terminals 21-22), add a suffix “-A1” to the Product Number, i.e., PMDU-A1. To order PMD units with DPDT output contacts instead of one SPDT and one SPNC, but with no manual reset feature, add a suffix “-A2” to the Product Number, i.e., PMDU-A2. ...
Page 2
... 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 ...