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ACA-20RM Series
True-RMS-AC Ammeters with Built-in CT
Performance/Functional Speci?cations
Typical at T A = +25°C, unless otherwise noted.
? Speci?ed 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-speci?c information.
Rated Full-Scale Current ?
ACA-20RM-O-ACX-RL
ACA-20RM-1-ACX-RL
ACA-20RM-2-ACX-RL
ACA-20RM-4-ACX-RL
Min.
–
–
–
–
Typ.
–
–
–
–
Max.
199.9
1.999
19.99
50.0
Units
mA
A
A
A
? 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.
? Speci?ed 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
ACA-20RM-5-ACX-RL
Overcurrent Rating ?
Performance
Sampling Rate
–
– 30.0 A
1.5 x Rated Full-Scale Current
2.5 Samples per second
scale. Ammeters are calibrated with a near full-scale 60Hz sine-wave current
?owing through the ammeter’s built-in CT.
? All speci?ed maximum power supply currents are steady state; larger surge
currents can occur at initial application of line power.
Accuracy ?
Measurement Type
±0.4%FS ±3 Counts with 60Hz
Sine-Wave Input
RMS Responding, Crest Factors of 1-5
Ordering Information
ACA-20RM- 1 - AC3 - R L - C
Temperature Drift (0 to 60 °C)
–
±0.2
±0.4
Cnts/°C
Add -C for RoHS
Zero-Current Reading (within
30 sec.)
Dielectric Withstanding Voltage
–001
2000
000
–
001
–
Cnts
Vdc
Input Range:
0 = 199.9mA
LED Color:
RL = Low-Power Red
Power:
AC3 = 85-140Vac@50/60Hz
UL/IEC61010-1
Power Supply Voltage
Measurement category II
1 = 1.999A
2 = 19.99A
AC4 = 170-264Vac@50/60Hz
ACA-20RM-X-AC3-RL
ACA-20RM-X-AC4-RL
Power Supply Current ?
ACA-20RM-X-AC3-XX
ACA-20RM-X-AC4-XX
Power Supply Terminal Block
85
170
–
–
120
220
30
30
140
264
50
50
Vac/47-63Hz
Vac/47-63Hz
mA/47-63Hz
mA/47-63Hz
4 = 50.0A (with split-core ?ying-lead CT)
5 = 30.0A (with ?ying-lead CT)
Accessories:
DMS-20-CP Panel Cutout Punch
TECHNICAL NOTES
Wire Size
Insulation Strip Length
Screw Tightening Torque
Rated Voltage
Display
Display Type and Size
Overrange Indication
Decimal Point
Physical/Environmental
16-22AWG, Solid and stranded
0.250 inches
2.2 lb·in (0.25 N·m) ±20%
310Vac
3? Digit Red LED, 0.37"/9.4mm High
“1___ ”
Fixed, model dependent
(see full-scale input Current)
IMPORTANT! To ensure safe and reliable operation, ACA-20RM
ammeters must be installed and serviced by quali?ed 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 speci?ed full scale input, at a nominal
line frequency of 60HZ.
2. Calibration : Periodic recalibration of ACA-20RM ammeters is not
Operating Temperature
0
–
+60
°C
required under normal indoor environments. If user calibration is
Storage Temperature
Humidity
Dimensions (non-condensing)
Weight
ACA-20RM-0,1,2-XXX-XX
ACA-20RM-4-XXX-XX
ACA-20RM-5-XXX-XX
–40 – +75 °C
–40 – +95 %
Model dependent, see page 3 & 4
1.1 ounces (31 grams) nominal
2.1 ounces (60 grams) nominal
1.5 ounces (43 grams) nominal
deemed necessary, it must be performed by quali?ed 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 speci?ed
full-scale current ?owing 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 Speci?cations section).
www.murata-ps.com/dpm
email: sales@murata-ps.com
MPM_ACA-20RM_B08 Page 2 of 5
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ACA-20RM-4-AC4-RL 制造商:Murata Power Solutions 功能描述:True-RMS-AC Ammeters With Built-In CT
ACA-20RM-4-AC4-RL-ALM-C 功能描述:数字面板表 50A rng, 170-264Vac 3.5 Dig brght rd LED RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-4-AC4-RL-C 功能描述:数字面板表 50AInput TrueRMS-AC RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-5-AC3-RL-ALM-C 功能描述:数字面板表 30A rng, 85-140Vac 3.5 Dig brght rd LED RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-5-AC3-RL-C 功能描述:数字面板表 30AInput TrueRMS-AC RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-5-AC4-RL-ALM-C 功能描述:数字面板表 30A rng, 170-264Vac 3.5 Dig brght rd LED RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-5-AC4-RL-C 功能描述:数字面板表 30AInput TrueRMS-AC RoHS:否 制造商:Murata Power Solutions 设备类型:AC Voltmeters 显示器类型:LED, 3 Digit, Red 工作电源电压:85 VAC to 264 VAC 工作电源电流:50 mArms 输入电流:50 mA 输入频率: 输入电压:120 VAC 系列:DMS-20PC-1-LM
ACA-20RM-ALM 制造商:MURATA-PS 制造商全称:Murata Power Solutions Inc. 功能描述:True-rms-AC Ammeters with Alarm Function