Murata Power Solutions ACM3P SeriesThree-Phase AC Ammeters MULTI-PHASE AC AMMETER Actual size PRODUCT OVERVIEW ■ 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 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 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 functionally 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 applications that require precise monitoring of 2- or 3-phase ac current. SIMPLIFIED SCHEMATIC DIAGRAM

Mu rata Power Solutions ACM3P SeriesThree-Phase AC Ammeters Performance/Functional Specifications Typical at TA=+ 25°C, 120Vac @ 50Hz, unless otherwise noted *See http://www.murata.com/products/power for model-specific availability. TECHNICAL NOTES_ IMPORTANT! To ensure safe and reliable operation, ACM3P amme- Aters must be installed and serviced by qualified technical personnel. Contact Murata Power Solutions if there is any doubt regarding their installation or operation. 1. Measurement Type: ACM3P series 3-phase ammeters employ a precision energy metering integrated circuit and a low-power...

ACM3P Series Three-Phase AC Ammeters 2P-A > 3P-A > 2P > 3P used to supply power to external loads. The supply wires feeding these power meters must be fused with a 0.5A/250V time delay/time lag fuse, in accordance with applicable regulatory codes. Where: 2P-A enables continuous auto-scrolling 2-phase operation 3P-A enables continuous auto-scrolling 3-phase operation 2P enables fixed 2-phase operation 3P enables fixed 3-phase operation Wire insulation must be stripped to within ±10% of the stated dimensions, and wires should be inserted into TB1 such that their insulation is not pinched by the...

ACM3P Series Three-Phase AC Ammeters TYPICAL WIRING DIAGRAMS Note: Line and phase currents are the same for Wye systems. 85–264 Vac 47–63 Hz Figure 2. Wiring diagram Wye systems Figure 3. Wiring diagram for Delta systems monitoring line current L3 85–264 Vac 47–63 Hz Figure 4. Wiring diagram for Delta systems monitoring phase current

ACM3P Series Three-Phase AC Ammeters PANEL CUTOUT RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS INTERNAL CORNER RADII: 0.032 (0.81) MAX. The panel opening must be centered vertically and horizontally between the four 0.093 (2.362mm) diameter holes. Tolerances (unless otherwise specified): .XX ± 0.02 (0.51) .XXX ± 0.010 (0.254) Angles ± 2˚ Side View Components are shown for reference only. Front View Back View Bottom View Diameter: Inner: 0.57 (14.5) Outer: 1.175 (29.8) CT Lead Length: Standard: 5.0” (127mm) min. Optional: 28.0” (700mm) min. on blue LED model

Mu rata Power Solutions ACM3P SeriesThree-Phase AC Ammeters 1. Description of safety marks: Caution, risk of electrical shock Caution, risk of danger J Equipment is protected throughout by double or reinforced insulation Murata Power Solutions, Inc. 129 Flanders Road, Westborough, MA 01581 U.S.A. ISO 9001 and 14001 REGISTERED This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: http://www.murata-ps.com/requirements/ Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described...