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ACM3P Series
Three-Phase AC Ammeters
Actual size
C
?
US E156931
FEATURES
?
? Measure and display the true-rms current of 3-phase
power systems
?
? Universal 85-264Vac (47-63Hz) operating supply
range
?
? Three built-in current transformers measure up to
100A per phase
?
? Ideal for power distribution units (PDUs) and backup
power systems
?
? Low power consumption: less than ?watt from
120Vac supply
?
? One-piece polycarbonate housing ?ts ‘0U’ & ‘1U’
rack spaces
?
? Low-pro?le surface mount design occupies minimal
behind-the-panel space
?
? Available in red, green, or blue LED-displays with
phase annunciators
?
? Low Cost; approvals to UL/cUL/IEC/61010-1
SIMPLIFIED SCHEMATIC DIAGRAM
PRODUCT OVERVIEW
Murata Power Solutions’ ACM3P series 3-phase AC ammeters measure and display the
true-rms values of 2- or 3-phase ac mains current. A front panel touch switch enables the
selection of a continuous reading of any of the three phases. All ACM3P ammeters are func-
tionally complete, with built-in L1, L2, and L3 current transformers—no other user-supplied
components or hardware are required.
ACM3P series AC ammeters are available with a 0-100A input range (150A peaks) and
provide a resolution of 0.1 Amp. Their 85-264Vac (47-63Hz) operating supply range makes
these ammeters perfect for worldwide 3-phase current monitoring applications. And, unlike
conventional average-responding products, ACM3P ammeters can accurately display the
true-rms values of triangle waves, square waves, and other irregularly shaped AC current
waveforms, with an accuracy of ±2% of full scale.
Their large (0.36"/9.2mm), bright LED display, available in a choice of red, blue, or green,
enables ACM3P ammeters to be easily readable from as far as 15 feet (5 meters). All
units are packaged in a one-piece, vibration resistant, polycarbonate housing that can be
installed in vertical ‘0U’ or horizontal ‘1U’ rack spaces. Their miniature size is ideal for UPS
backup power sources, power strips, alternative energy metering, and any other applica-
tions that require precise monitoring of 2- or 3-phase ac current.
PHASE 2
L2
PHASE 1
L1
L1
+5V
A/D
L2
L3
PHASE 3
CONVERTER
L3
+5V
CURRENT
LIMITED
B
+5V
　
85-264 Vac
47-63 Hz
SUPPLY
A
AC/DC
CONVERTER
MICRO-
CONTROLLER
For full details go to
www.murata-ps.com/rohs
SEL
www.murata-ps.com/support
MPM_ACM3P Series.A04 Page 1 of 6
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