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.

A

B

85-264 Vac

47-63 Hz

AC/DC

CONVERTER

MICRO-

CONTROLLER

SEL

+5V

+5V

+5V

A/D

CONVERTER

L1

L2

L3

PHASE 3

L3

PHASE 1

L1

PHASE 2

L2

CURRENT

LIMITED

SUPPLY

Actual size

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 ¼watt from

120Vac supply

„

„ One-piece polycarbonate housing fits ‘0U’ & ‘1U’

rack spaces

„

„ Low-profile 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

C

®

US E156931

www.murata-ps.com

www.murata-ps.com/support

For full details go to

www.murata-ps.com/rohs

ACM3P Series

Three-Phase AC Ammeters

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