ACA5-20PC Series www.murata-ps.com 5 Amp Input LED-Display AC Ammeters C US E156931 FEATURES ACA5-20PC Series AC Ammeters are designed to scale and digitally display the output of standard, 5A-output current transformers (50:5A, 500:5A, 1000:5A, etc.). Simply pass the Scales and displays the output of 50:5A to 2000:5A current transformers secondary/output wires of theprimar CT through the ACA5-20PC s on-board CT, apply power to the meter, and you re instantly measuring ac currents over one of 14 ranges from 14 ranges (0-50 Amp to 0-2000 Amp) 0-50A (with 100mA resolution) to 0-2000A (with 1A resolution). Because they accept out- 2 Power options, 28 models puts from previously installed high-current CT s, ACA5-20PC s can instantly bring modern Functionally complete: digital precision to older ac ammeters. On-board 5A current transformers The functionally complete ACA5-20PC ammeters incorporate scaling/interface circuitry Scaling/interface circuitry to mate the on-board CT to a precision (3 digit) A/D converter. The A/D s output directly Precision A/D converters drives the meters large (0.37 /9.4mm digit height), easy-to-read, LED displays. All models Bright red or green LED displays employ auto-zero circuits, precision bandgap references, and super stable metal-film resis - Subminiature, 1.38 x 0.88 package tors for unsurpassed accuracy (0.15%FS) and stability. Easy-to-read, 0.37 /9.4mm digits ACA5-20PC meters are either ac (120/220Vac 50/60Hz) or dc (+5-40V) powered. AC powered models: 120/220Vac 50/60Hz AC models can be powered by the same ac supply whose current they are monitoring. All ACA5-20PCs provide 2000Vdc isolation between the measured ac current and their power AC models can beself-powere supply, and all models are UL/CSA recognized. +5-40V dc powered model Each meter is housed in a subminiature, 1.38 x 0.88 , epoxy-encapsulated package 2000V isolation approvals to UL/cUL/IEC/61010-1 whose behind-the-panel installation depth is 2 inches. Display color options include stan- Digital replacements for analog ammeters dard red, high-intensity red, and standard green. Each meter is supplied with a plastic bezel assembly with sealing gaskets (MPS DMS-BZL4-C). SIMPLIFIED SCHEMATIC DRAWING For full details go to www.murata-ps.com/rohs CURRENT LIMITED AC OR DC SUPPLY www.murata-ps.com/support MPM ACA5-20PC.C02 Page 1 of 5ACA5-20PC Series 5 Amp Input LED-Display AC Ammeters Performance/Functional Specifications Ordering Information Typical at TA = + 25C, unless otherwise noted. ACA5 - 20PC - 1 - AC1 - RL - C Full-Scale Current (A) (B) Min. Typ. Max. Units All Models 5.0 Amps Add -C for RoHS Input Range: Overcurrent Rating (A) 1.5 x rated full-scale current (45-450Hz) 1 = 50.0A LED Color: Performance RL = Red Standard 2 = 75.0A Sampling Rate 2.5 reading per second 3 = 100.0A Accuracy (B) 0.15%FS 6 Counts 4 = 150.0A Power Supply: Measurement Type Sine wave input, full-wave averaging, 5 = 199.9A AC1 = 85-264Vac 50/60Hz rms calibrated 6 = 250A DC1 = +5-40Vdc Temperature Drift (0 = +60C) 0.2 0.4 Cnts/C 7 = 300A 8 = 400A Zero Reading 001 000 001 Counts 9 = 500A Dielectric Withstanding Voltage 2000 Vdc 10 = 600A UL/IEC61010-1 Measurement category II 11 = 750A Power Supply Voltage (C) 12 = 1000A 13 = 1500A ACA-20PC-X-AC1-RL (47-99Hz) 85 120 264 Vac 14 = 1999A ACA-20PC-X-DC1-RL +4.75 +40 Vdc Power Supply Current (D) See www.murata-ps.com/dpm-availability for model-specific availability. ACA-20PC-X-AC1-RL (47-99Hz) 30 50 mA A DMS-BZL4 bezel assembly with sealing gasket is supplied with each ACA-20PC-X-DC1-RL +8 +12 mAdc ammeter. Power Supply Terminal Block TECHNICAL NOTES Wire Size and Type 16-22AWG (solid or stranded) Insulation Strip Length 0.25 inches IMPORTANT To ensure safe and reliable operation, ACA5-20PC Screw Tightening Torque 3.6 pounds/inches (0.4Nm) ammeters must be installed and serviced by qualified technical per - sonnel. Contact Murata Power Solutions if there is any doubt regarding Display ammeter installation and/or operation. Display Type and Size 3 digit, 0.37 /9.4mm high LED 1. Measurement Type: ACA5-20PC ac ammeters employ a full-wave- Overrange Indication 1 rectified, average responding, rms-calibrated circuit to measure the Decimal Point Model dependent. See Ordering Info. stepped-down output of their built-in L1 current transformer (CT) . Physical/Environmental Stated accuracy specifications are measured using a sine-wave cur - Operating Temperature 0 +60 C rent at or close to the full-scale input level, at nominal line frequency. Storage Temperature 40 +75 C 2. Calibration: Periodic recalibration of ACA5-20PC ammeters is not required under normal, indoor operating environments. If user calibra- Humidity (non-condensing) 0 95 % tion is necessary, it should be performed by qualified technical personnel. Case Material Polycarbonate Calibration is performed with potentially lethal voltages applied to the Dimensions 1.38W x 0.88H. Depth is model depen- ACA5-20PC and its associated wiring, with the specified full-scale dent (see mechanical specification) current flowing through the ammeters built-in current transformer. Weight: (All models) 1.27 Ounces (36 grams) typical A plastic, fully-insulated adjusting tool must be used to access the recessed calibration potentiometer located on the back of the meter (see Mechanical Specifications). Contact MPS if additional information (A) The specified Full-Scale Current is the current carried by the single wire passing through the center hole of the ACA5-20PC s on-board CT. It is not the load current ultimately being is required regarding calibration, setup, or any other technical issue measured. the Overcurrent Rating is a continuous rating that applies to the Full-Scale pertaining to ACA5-20PC ammeters. Current. It does not apply to any circuitry external to the meter. 3. Wire Gauges and Fusing: Wires specified in the Functional Specifica - (B) Listed accuracy specifications apply over the range of the Rated Full-Scale Current over frequencies of 45-450Hz. tions section must be used for making connections to ACA5-20PC (C) Maximum reverse polarity protection onDC1 models is 40Vdc. Series ammeters. All power-supply and load wiring must be rated for (D) All specified maximum power supply currents are steady-state. AC-powered models can the supply voltages and currents they will conduct and must comply draw larger surges at initial turn on. with any code or application-mandated requirements pertaining to the users specific installation. www.murata-ps.com/support MPM ACA5-20PC.C02 Page 2 of 5