Input LED-Display Ammeters E156931 FEATURES Scales disp

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Input LED-Display Ammeters E156931 FEATURES Scales disp

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ACA5-20PC Series
Input LED-Display Ammeters
E156931
FEATURES
Scales displays output 50:5A 2000:5A current transformers ranges (0-50 0-2000 Amp) Power options, models Functionally complete: On-board current transformers Scaling/interface circuitry Precision converters Bright green displays Subminiature, 1.38" 0.88" package Easy-to-read, 0.37"/9.4mm digits powered models: 120/220Vac 50/60Hz models "self-powered" +5-40V powered model 2000V isolation; UL/CSA recognized Digital replacements analog ammeters
ACA5-20PC Series Ammeters designed scale digitally display output standard, 5A-output current transformers (50:5A, 500:5A, 1000:5A, etc.). Simply pass secondary/output wires "primary" through ACA5-20PC's on-board apply power meter, you're instantly measuring currents over ranges from 0-50A (with 100mA resolution) 0-2000A (with resolution). Because they accept outputs from previously installed high-current CT's, ACA5-20PC's instantly bring modern digital precision older ammeters. functionally complete ACA5-20PC ammeters incorporate scaling/interface circuitry mate on-board precision digit) converter. A/D's output directly drives meters' large (0.37"/9.4mm digit height), easy-to-read, displays. models employ auto-zero circuits, precision bandgap references, super stable metal-film resistors unsurpassed accuracy (±0.15%FS) stability. ACA5-20PC meters either (120/220Vac 50/60Hz) (+5-40V) powered. models powered same supply whose current they monitoring. ACA5-20PCs provide 2000Vdc isolation between measured current their power supply, models UL/CSA recognized. Each meter housed subminiature, 1.38" 0.88", epoxy-encapsulated package whose behind-the-panel installation depth inches. Display color options include standard red, high-intensity red, standard green. Each meter supplied with plastic bezel assembly with sealing gaskets (MPS DMS-BZL4-C).
SIMPLIFIED SCHEMATIC DRAWING
full details www.murata-ps.com/rohs
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MPM_ACA520PC_B03 Page
ACA5-20PC Series
Input LED-Display Ammeters
Performance/Functional Specifications Typical 25°C, unless otherwise noted. Full-Scale Current Models Overcurrent Rating Performance Sampling Rate Accuracy Measurement Type Temperature Drift +60°C) Zero Reading Dielectric Withstanding Voltage Power Supply Voltage ACA-20PC-X-AC1-RL (47-99Hz) ACA-20PC-X-DC1-RL Power Supply Current ACA-20PC-X-AC1-RL (47-99Hz) ACA-20PC-X-DC1-RL Power Supply Terminal Block Wire Size Type Insulation Strip Length Screw Tightening Torque Display Display Type Size Overrange Indication Decimal Point Physical/Environmental Operating Temperature Storage Temperature Humidity (non-condensing) Case Material Dimensions Weight: (All models) digit, 0.37"/9.4mm high Model dependent. Ordering Info. 16-22AWG (solid stranded) 0.25 inches pounds/inches (0.4Nm) mAdc +4.75 reading second ±0.15%FS Counts Sine wave input, full-wave averaging, calibrated "-001" 2000 ±0.2 "000" ±0.4 "001" Cnts/°C Counts Min. Typ. Max. Units Amps Input Range: (45-450Hz) 50.0A 75.0A 100.0A 150.0A 199.9A 250A 300A 400A 500A 600A 750A 1000A 1500A 1999A Partno. 7020-01036-0 7020-01037-0 7020-01038-0 7020-01039-0 7020-01040-0 7020-01041-0 39-3681407 39-3681408 39-3681409 7020-01042-0 7020-01043-0 7020-01044-0 7020-01045-0 7020-01046-0 RoHS Compliant
Ordering Information
ACA5 20PC RoHS Color: Standard Power Supply: 85-264Vac@50/60Hz +5-40Vdc
rated full-scale current
Accessories: DMS-20-CP Panel cutout punch DMS-BZL4 bezel assembly with sealing gasket supplied with each ammeter. Matching Current Transformers: current transformers ACA5-20PC ammeters available from Murata Power Solutions nominal cost. technical information, visit www.murata-ps.com, select Digital Panel Meters, then Accessories.
TECHNICAL NOTES
IMPORTANT! ensure safe reliable operation, ACA5-20PC ammeters must installed serviced qualified technical personnel. Contact Murata Power Solutions there doubt regarding ammeter installation and/or operation. Measurement Type: ACA5-20PC ammeters employ full-waverectified, average responding, rms-calibrated circuit measure stepped-down output their built-in current transformer (CT) Stated accuracy specifications measured using sine-wave current close full-scale input level, nominal line frequency. Calibration: Periodic recalibration ACA5-20PC ammeters required under normal, indoor operating environments. user calibration necessary, should performed qualified technical personnel. Calibration performed with potentially lethal voltages applied ACA5-20PC associated wiring, with specified full-scale current flowing through ammeter's built-in current transformer. plastic, fully-insulated adjusting tool must used access recessed calibration potentiometer located back meter (see Mechanical Specifications). Contact additional information required regarding calibration, setup, other technical issue pertaining ACA5-20PC ammeters. Wire Gauges Fusing: Wires specified Functional Specifications section must used making connections ACA5-20PC Series ammeters. power-supply load wiring must rated supply voltages currents they will conduct must comply with code application-mandated requirements pertaining user's specific installation.
Technical enquiries email: sales@murata-ps.com, tel: 3000
Polycarbonate 1.38"W 0.88"H. Depth model dependent (see mechanical specification) 1.27 Ounces grams) typical
specified Full-Scale Current current carried single wire passing through center hole ACA5-20PC's on-board load current ultimately being measured. Overcurrent Rating continuous rating that applies Full-Scale Current. does apply circuitry external meter. Listed accuracy specifications apply over range Rated Full-Scale Current over frequencies 45-450Hz. Maximum reverse polarity protection "DC1" models -40Vdc. specified maximum power supply currents steady-state. AC-powered models draw larger surges initial turn
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MPM_ACA520PC_B03 Page
ACA5-20PC Series
Input LED-Display Ammeters
supply wires connected both meter load must fused according current rating wire gauge being used, accordance with applicable regulatory codes. Also, wire insulation should stripped within +/-10% stated dimensions, wires should inserted into such that their insulation pinched screw terminal. used only powering meter's internal circuitry. must used supply current external loads. AC-powered models draw minimal steady-state supply currents (50mA max.), most applications, they fused according supply wire's maximum amperage rating. However, these models draw significantly higher surge currents brief periods when line voltage initially applied. Supply Polarity Grounding: supply inputs, TB1-A TB1-B, ac-powered ACA5-20PC ammeters themselves polarity sensitive, that they have internal designations. Also, ac-powered ACA5-20PC ammeters include require connection earth/chassis ground. Connector Torque Ratings: important tighten TB1's, screwterminals their rated torque specification pound-inches (0.4Nm). Proper tightening will minimize connector losses ensure safe, reliable operation. DC-Powered Models: DC-powered models draw minimal supply currents (120mA max.) most applications fused according supply wire's maximum amperage rating. However, sure check comply with applicable codes regulations ensure proper installation operation. Isolation: on-board (L1) provides minimum 2000Vdc isolation between current-carrying conductor passing through primary circuit ammeter supply voltage connected TB1. This isolation rating only applies applications which load wiring (i.e., wire passing through L1's center hole) does connect directly indirectly TB1-A TB1-B. Precautions: normal operation, current transformer's secondary circuit operates very voltage closedloop operation burden resistance. However, still generate potentially lethal voltages output current suddenly interrupted. example, loose secondary connections cause condition referred "inductive kick". Inductive kick generate extremely high voltages across intermitent secondary connections.
Step
Therefore, implementing connections current transformer's output leads must only performed with zero load-current, that with power applied load circuit. Connections Grounding: Some applications require connecting external CT's output leads earth/chassis ground. USA, consult latest revision National Electrical Code (NEC) more information regarding grounding. After mechanical assembly completed, connect output leads external each other after they through L1's center hole. Pressure-style connectors (commonly refered "wire nuts") acceptable long they rated number conductors voltage invloved. Replacing Analog Panel Meters: ACA5-20PC ammeters used direct replacements analog panel meters driven CT's. wiring operations must performed with both load supply power sources completely de-energized.
PANEL INSTALLATION
connections ACA5-20PC Series ammeters must made after ammeter securely attached panel with load supply voltages de-energized (off). Care should exercised when passing conductors through ammeter's built-in installed wire positions should such that minimal forces applied built-in TB1, ammeter itself. high-vibration environments, proper strain reliefs must used load supply wiring. ensure secure panel-mount installation, recommends using DMS-BZL4-C bezel assembly (with sealing gasket) supplied with each ammeter. Mechanical Specifications detailed cutout ammeter dimensions. Following four-step sequence shown Figure being careful apply excessive force twisting motions insert ammeter into panel opening. When using DMS-BZL4-C, install sealing gasket positioned between ammeter's front flange panel front surface (see Mechanical Specifications). sure securely tighten four screws supplied with bezel assembly.
Step
Step
Step
Figure Panel Installation
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MPM_ACA520PC_B03 Page
ACA5-20PC Series
Input LED-Display Ammeters
TYPICAL WIRING DIAGRAMS
First pass carefully dress output wire from external through on-board (L1). Then connect supply shown. required, verify that correct line-power polarities applied external load (see Technical Note Ensure wires stripped terminals torqued correctly. proper operation, pass only single wire through on-board CT's center hole.
Figure ACA5-20PC AC-Powered Models
First pass carefully dress output wire from external through on-board (L1). Then connect powersupply wires TB1, observing correct positive ("+") negative ("-") polarities. Ensure wires stripped terminals torqued correctly. proper operation, pass only single wire through on-board CT's center hole.
Figure ACA5-20PC DC-Powered Models
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Technical enquiries email: sales@murata-ps.com, tel: 3000
MPM_ACA520PC_B03 Page
ACA5-20PC Series
Input LED-Display Ammeters
MECHANICAL SPECIFICATIONS
Tolerances inches (mm): ±0.02 (±0.51), ±0.010 (±0.254)
BEZEL INSTALLATION RECOMMENDED DRILL PANEL CUTOUT
DMS-BZL4-C BEZEL
USA: Canada: France: Germany: Japan: China: Singapore:
Mansfield (MA), Tel: (508) 339-3000, email: sales@murata-ps.com Toronto, Tel: (866) 740-1232, email: toronto@murata-ps.com Milton Keynes, Tel: (0)1908 615232, email: mk@murata-ps.com Montigny Bretonneux, Tel: (0)1 email: france@murata-ps.com Tel: (0)89-544334-0, email: munich@murata-ps.com Tokyo, Tel: 81-3-3779-1031, email: japan@murata-ps.com Kyoto, Tel: 81-75-955-7269, email: japan@murata-ps.com Shanghai, Tel: 3678, email: shanghai@murata-ps.com Guangzhou, Tel: 8066, email: guangzhou@murata-ps.com Parkway Centre, Tel: 6348 9096, email: singapore@murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: 3000
Murata Power Solutions, Inc. Cabot Boulevard, Mansfield, 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com 9001 14001 REGISTERED
05/27/09
Murata Power Solutions, Inc. makes representation that products circuits described herein, other technical information contained herein, will infringe upon existing future patent rights. descriptions contained herein imply granting licenses make, use, sell equipment constructed accordance therewith. Specifications subject change without notice. 2009 Murata Power Solutions, Inc.
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MPM_ACA520PC_B03 Page

Input LED-Display Ammeters E156931 FEATURES Scales disp

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