ACA-20RM Datasheet, PDF (1/5 Pages) Murata Power Solutions Inc. – True-RMS-AC Ammeters with Built-in CT

ACA-20RM Series
True-RMS-AC Ammeters with Built-in CT
FEATURES
N _{Built-in CTs provide true-rms values of complex}
waveforms
N _{Perfect for measuring AC current in IT applications}
N _{Five ranges measure: 0-0.2A, 0-2A, 0-20A, 0-30A}
and 0-50A
N _{50A models features a split-core CT for easy installation}
N _{Self-powered from 85-140Vac or 170-264Vac}
N _{Large, easy-to-read, red LED display with 0.37” digits}
N _{Reliable single-board construction}
N _{Digital replacement for analog meters}
N _{UL and CSA recognized components}
Murata Power Solution’s new ACA-20RM Series are the world’s first digital ac-ammeters
to incorporate a built-in current transformer (CT) to directly measure the true-rms value of
complex, non-sinusoidal ac currents from 2 to 50A – no bulky and expensive 5A “donut”
CTs are required! Operation and setup is straightforward: simply pass the load-carrying
wire through the on-board CT, apply power, and the ammeter is fully operational.
Five input ranges measure 0-0.2 amps (0.1mA resolution), 0-2 amps (0.001A resolution),
0-20 amps (0.01A resolution), 0-30 amps (0.1A resolution) or 0-50 amps (0.1A resolution).
The 50A model features an oversized split-core current transformer that easily accommo-
dates wires sizes up to 4 AWG (21.2mm²). Two power supply options are available: 85-140V
(47-63Hz), and 170-264V (47-63Hz).
All models are totally self-contained; no external components are required. Power con-
sumption 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.
ACA-20RM Series 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
panel-cutout compatible with MPS’s DMS-20 Series of ac voltage and frequency monitors,
making ACA-20RM ammeters perfect replacements for older, less reliable, analog panel
meters in today’s sophisticated IT instrumentation.
Ḥ
For full details go to
www.murata-ps.com/rohs
RMS-to-DC
CONVERTER
(L1)
BUILT-IN
CURRENT
TRANSFORMER
CAL.
+
3½ DIGIT
A/D CONVERTER
–
+V
–V
POWER
CONVERTER
A
B
TB1
LED DISPLAY
MEASURED AC
LOAD CURRENT
www.murata-ps.com
AC INPUT POWER
Technical enquiries email: [e-mail], tel: [phone]
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