ACA-20RM-5-AC3-RL-ALM-C Murata Power Solutions Inc, ACA-20RM-5-AC3-RL-ALM-C Datasheet

AMMETER AC 30A 120V W/ALARM RED

ACA-20RM-5-AC3-RL-ALM-C

Manufacturer Part Number
ACA-20RM-5-AC3-RL-ALM-C
Description
AMMETER AC 30A 120V W/ALARM RED
Manufacturer
Murata Power Solutions Inc
Series
ACA-20RM-ALMr
Type
Ammeterr
Datasheet
1.ACA-20RM-5-AC3-RL-ALM-C.pdf (5 pages)

Specifications of ACA-20RM-5-AC3-RL-ALM-C

Display Type
LED
Measuring Range
0 ~ 30.0A
Display Style
Red Characters, Black Background
Display Digits
3.5
Display Digits - Height
0.370" (9.40mm)
Backlight
Without
Mounting Type
Panel Mount
Termination
Terminal Block
Voltage - Supply
85 ~ 140VAC
Dimensions
53.34 mm L x 35.56 mm W x 18.54 mm H
Mounting Style
Panel
Primary Voltage Rating
85 V to 140 V
Secondary Current Rating
30 A
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Display Face Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
811-1982
FEATURES
■
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■
■
■
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■
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www.murata-ps.com
User–settable, visual alarm function
Flashing display indicates overcurrent faults
Measures the true-rms value of complex ac current
waveforms
Includes built-in current transformers
Ideal for measuring current in sensitive IT applications
Available in two input ranges: 0-30.0A, and 0 to 50A
50A model features convenient split-core CT
Easy-to-read, red LED display with 0.37"/9.4mm high
digits
Two AC power options: 85-140Vac & 170-264Vac
(50/60Hz)
2000V isolation between ac supply and load conductor
www.murata-ps.com/rohs
For full details go to
　
www.murata-ps.com/dpm
TRANSFORMER
CURRENT
BUILT-IN
the true-rms value of non-sinusoidal ac currents and provide a user-settable, over current
alarm function. When the preset over current level is exceeded, the LED display continu-
ously fl ashes from high to low intensity. All models are totally self-contained—no other
user-supplied components are required. A built-in current transformer greatly simplifi es
most ac ammeter applications: just pass the load conductor through the built-in current
transformer, apply ac power, and the ammeter is fully operational.
tion. The 50 Amp model features a convenient split-core type current transformer which
can be clamped around insulated live conductors. 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. Super-stable components and an rms-to-dc converter
circuit combine to achieve excellent performance when measuring the complex, non-sinu-
soidal, ac currents found in today’s computer/telecom equipment.
3½ digit, bright red LED-displays and a built-in bezel/fi lter assembly that includes metal
fasteners. They are also panel cutout compatible with MPS’s DMS-20RM Series of rms-
reading ac voltage monitors, making ACA-20RM-ALM ammeters the ideal upgrade for
today’s sophisticated instrumentation.
Murata Power Solutions’ ACA-20RM-ALM Series digital ac ammeters accurately display
Two input ranges are available: 0-30.0 Amps, or 0 to 50.0 Amps, both with 0.1A resolu-
All ACA-20RM-ALM Series true-rms ammeters feature full-size, 0.37" (9.4mm) high,
LOAD CURRENT
MEASURED AC
CONVERTER
rms-to-DC
(L1)
Figure 1. ACA-20RM-ALM Series simplifi ed schematic
True-rms-AC Ammeters with Alarm Function
ACA-20RM-ALM Series
+
–
+V
AC INPUT POWER
A/D CONVERTER
15 Mar 2011 MPM_ACA-20RM-ALM.A04 Page 1 of 5
CONVERTER
CAL.
A
3½ DIGIT
POWER
B
TB1
–V
email: sales@murata-ps.com
LED DISPLAY

ACA-20RM-5-AC3-RL-ALM-C Summary of contents

Page 1

... LED-displays and a built-in bezel/fi lter assembly that includes metal fasteners. They are also panel cutout compatible with MPS’s DMS-20RM Series of rms- reading ac voltage monitors, making ACA-20RM-ALM ammeters the ideal upgrade for today’s sophisticated instrumentation. ...

Page 2

... Specifi ed accuracy applies to inputs with crest factors (CF 2.0, where CF ➃ All specifi ed maximum power supply currents are steady state; larger surge Sine-Wave Input ±0.4 Counts/ºC ACA-20RM-4-AC3-RL-ALM-C 001 Counts ACA-20RM-4-AC4-RL-ALM-C ACA-20RM-5-AC3-RL-ALM-C — Vdc ACA-20RM-5-AC4-RL-ALM-C TECHNICAL NOTES 140 Vac/47-63Hz 264 Vac/47-63Hz ...

Page 3

... To adjust the overcurrent alarm set-point level: A. Turn off power to the ACA-20RM-ALM (i.e., the power source con- nected to TB1). B. Carefully remove the shorting jumper across JP1 from its ‘normal operation position’ across terminals 2 and 3 and place it across JP1 terminals 1 and 2. C. Re-apply power to TB1 and, using a plastic insulated adjusting tool, adjust R3 so the ammeter’ ...

Page 4

... PANEL INSTALLATION All connections to ACA-20RM-ALM Series ammeters must be made after the ammeter is securely attached to the panel and with all associated load and supply voltages de-energized (off), using extreme caution and observing all safety measures applicable to the user’s installation. Care should be exercised when passing conductors through the amme- ter’ ...

Page 5

... M9 M9 BACK VIEW A B TB1 Lead Length 5.0 (127.0) min. 1.575 0.40 (40.00) (10.2) Diameter 0.984 (24.99) SIDE VIEW 0.551 (14.00) 0.480 (12.19) © 2011 Murata Power Solutions, Inc. email: sales@murata-ps.com 15 Mar 2011 MPM_ACA-20RM-ALM.A04 Page 1.400 (35.56) 1.024 (26.01) ...