PMDU MACROMATIC CONTROLS, PMDU Datasheet
PMDU
Manufacturer Part Number
PMDU
Description
PHASE MONITORING RELAY SPDT/SPNC, 480VAC
Manufacturer
MACROMATIC CONTROLS
Datasheet
1.PMDU.pdf
(2 pages)
Specifications of PMDU
Contact Configuration
SPDT / SPST-NC
Phase Type
3 Phase
Power Consumption
3VA
Supply Voltage Max
480VAC
Switching Voltage Max
240VAC
Operating Time Range
1s To 300s
Relay Mounting
SMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
PHASE MONITOR RELAYS
Phase Loss, Phase Reversal, Phase
Unbalance, and Under/Over Voltage
PMD Series Surface-Mount
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www.macromatic.com
sales@macromatic.com
Universal voltage range of
208-480V on PMDU
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 or Manual Reset
Multi-Color LED indicates
normal condition and
provides fault indication to
simplify troubleshooting
45mm DIN-style surface-
mount case
10A SPDT & SPNC output
contacts
800-238-7474
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 unbal-
anced 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 82 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
208-480V
VOLTAGE
50/60 Hz
120V
575V
PRODUCT
NUMBER
PMD120
PMDU
PMD600
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WIRING n
DIAGRAM 105
1/09
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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
... Fixed Time Based on Inverse Time Curve Dimensions 2.7 2.4 (70) (60) 1/09 PHASE MONITOR RELAYS Phase Loss, Phase Reversal, Phase Unbalance, and Under/Over Voltage Hysteresis Load (burden): Less than 3VA Temperature: -28 Mounting: Does not require a socket. Can either be mounted directly on 35mm DIN track with no additional parts back-panel with two screws ...