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ACA-20RM-4-AC3-RL-C Datasheet(PDF) 2 Page - Murata Power Solutions Inc. |
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ACA-20RM-4-AC3-RL-C Datasheet(HTML) 2 Page - Murata Power Solutions Inc. |
2 / 5 page 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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