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ACA5-20RM-9-AC3-RL-C Datasheet(PDF) 1 Page - Murata Power Solutions Inc. |
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ACA5-20RM-9-AC3-RL-C Datasheet(HTML) 1 Page - Murata Power Solutions Inc. |
1 / 5 page MPM_ACA5-20RM.A01 Page 1 of 5 ACA5-20RM Series True-rms-AC Ammeters with 5A CT Inputs For full details go to www.murata-ps.com/rohs www.murata-ps.com Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000 Murata Power Solutions’ ACA5-20RM Series accept the output of external 5A current transformers (CTs) and accurately display the true-rms value of complex, non-sinusoidal ac currents up to 500A. Operation and setup is straightforward: simply pass the external 5A CT’s secondary 0-5A output leads through the ACA5-20RM’s on-board toroid sensor, apply ac power, and the ammeter is fully operational. All models are totally self-contained—other than the external 5A CT, no other user-supplied components are required. Three input ranges measure 0-100.0 amps (with 0.1A resolution), 0-200 amps (0.1A resolution), and 0-500 amps (1A resolution). Two power supply options are available: 85-140V (47-63Hz), and 170-264V (47-63Hz). Power consumption from a nominal 120V or 220V ac supply is less than 50mA. And, precision auto-zeroing circuitry, super-stable components, and an rms-to-dc converter circuit combine to achieve excellent performance when measuring the complex, non-sinusoidal, ac currents found in today’s computer/telecom equipment. ACA5-20RM Series rms ammeters feature full-size, 0.37 " (9.4mm) high, 3½ digit, bright red LED-displays and a built-in bezel/filter assembly that features metal fasteners. They are also panel-cutout compatible with Murata Power Solutions’ DMS-20RM Series of rms-reading ac voltage monitors, making ACA5-20RM ammeters perfect replace- ments for older, less reliable, analog voltmeters and ammeters in today’s sophisticated instrumentation. FEATURES Scales and displays the true-rms output of 5A current transformers Accurately measure complex ac current waveforms Perfect for measuring current in IT applications Available in three input ranges: 0-100A, 0 to 200A, or 0 to 500A Functionally complete: On-board, low-burden toroid sensor Scaling/interface circuitry Precision A/D converter Reliable single-board construction Easy-to-read, red LED display with 0.37 "/9.4mm digits Two AC power options: 85-140Vac & 170-264Vac (50/60Hz) 2000V isolation between ac supply and external CT Digital replacement for analog meters PRECISION rms-to-DC CONVERTER BUILT-IN TOROID SENSOR L1 TB1 AB Figure 1. ACA5-20RM Series simplified schematic |
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