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ACA-20RM-4-AC3-RL-C Datasheet(PDF) 2 Page - Murata Power Solutions Inc.

Part # ACA-20RM-4-AC3-RL-C
Description  True-RMS-AC Ammeters with Built-in CT
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Manufacturer  MURATA-PS [Murata Power Solutions Inc.]
Direct Link  http://www.murata-ps.com
Logo MURATA-PS - Murata Power Solutions Inc.

ACA-20RM-4-AC3-RL-C Datasheet(HTML) 2 Page - Murata Power Solutions Inc.

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MPM_ACA-20RM_B02 Page 2 of 5
ACA-20RM Series
True-RMS-AC Ammeters with Built-in CT
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
TECHNICAL NOTES
IMPORTANT! To ensure safe and reliable operation, ACA-20RM
ammeters must be installed and serviced by qualified technical
personnel after reading this data sheet in it's entirety. Contact DATEL
if there is any doubt regarding their installation or
operation.
1. Measurement Type: ACA-20RM ac ammeters employ true-rms
input circuitry to measure the stepped-down output of their on-board
current transformers (CT). Stated accuracy is measured using a sine-
wave input at, or close to, the specified full scale input, at a nominal
line frequency of 60HZ.
2. Calibration: Periodic recalibration of ACA-20RM ammeters is not
required under normal indoor environments. If user calibration is
deemed necessary, it must be performed by qualified technical
personnel since potentially lethal voltages and currents are applied to
the ACA-20RM during the calibration process.
Calibration is performed with approximately 95% of the specified
full-scale current flowing through the ammeter’s built-in CT. A fully
insulated, non-metallic adjusting tool must be used to adjust the
calibration potentiometer, located on the back of the ammeter (see
Mechanical Specifications section).
Performance/Functional Specifications
Typical at TA = +25°C, unless otherwise noted.
Input Range:
0 = 199.9mA
1 = 1.999A
2 = 19.99A
4 = 50.0A (with split-core flying-lead CT)
5 = 30.0A (with flying-lead CT)
Ordering Information
ACA-20RM- 1 - AC3 - R L - C
Power:
AC3 = 85-140Vac@50/60Hz
AC4 = 170-264Vac@50/60Hz
LED Color:
RL = Low-Power Red
Accessories:
DMS-20-CP Panel Cutout Punch
Specified full-scale currents are those passing through the ammeter’s built-in
current transformer’s primary load-circuit. See Notes 2 and 3 below for ad-
ditional model-specific information.
The overcurrent rating of 1.5 x the rated full-scale current is a continuous rating
and applies to the current passing through the built in current transformer only,
it does not apply to any external circuit-wiring or external loads. Accuracy is
guaranteed up to the rated current level.
Specified accuracy applies to inputs with crest factors (CF) up to 2.0, where CF
= Vpeak/Vrms. Crest factors of 2 to 5 introduce an additional error of ±3% of full
scale. Ammeters are calibrated with a near full-scale 60Hz sine-wave current
flowing through the ammeter’s built-in CT.
All specified maximum power supply currents are steady state; larger surge
currents can occur at initial application of line power.
Add -C for RoHS
Rated Full-Scale Current
Min.
Typ.
Max.
Units
ACA-20RM-O-ACX-RL
199.9
mA
ACA-20RM-1-ACX-RL
1.999
A
ACA-20RM-2-ACX-RL
19.99
A
ACA-20RM-4-ACX-RL
50.0
A
ACA-20RM-5-ACX-RL
30.0
A
Overcurrent Rating
1.5 x Rated Full-Scale Current
Performance
Sampling Rate
2.5 Samples per second
Accuracy
±0.4%FS ±3 Counts with 60Hz
Sine-Wave Input
Measurement Type
RMS Responding, Crest Factors of 1-5
Temperature Drift (0 to 60 °C)
±0.2
±0.4
Cnts/°C
Zero-Current Reading (within
30 sec.)
–001
000
001
Cnts
Dielectric Withstanding Voltage
2000
Vdc
Power Supply Voltage
ACA-20RM-X-AC3-RL
85
120
140
Vac/47-63Hz
ACA-20RM-X-AC4-RL
170
220
264
Vac/47-63Hz
Power Supply Current
ACA-20RM-X-AC3-XX
30
50
mA/47-63Hz
ACA-20RM-X-AC4-XX
30
50
mA/47-63Hz
Power Supply Terminal Block
Wire Size
16-22AWG, Solid and stranded
Insulation Strip Length
0.250 inches
Screw Tightening Torque
3.6 pounds-inches (0.4Nm)
Rated Voltage
310Vac
Display
Display Type and Size
3½ Digit Red LED, 0.37”/9.4mm High
Overrange Indication
“1___”
Decimal Point
Fixed, model dependent
(see full-scale input Current)
Physical/Environmental
Operating Temperature
0
+60
°C
Storage Temperature
–40
+75
°C
Humidity
–40
+95
%
Dimensions (non-condensing)
Model dependent, see page 3 & 4
Weight
ACA-20RM-0,1,2-XXX-XX
1.1 ounces (31 grams) nominal
ACA-20RM-4-XXX-XX
2.1 ounces (60 grams) nominal
ACA-20RM-5-XXX-XX
1.5 ounces (43 grams) nominal


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