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ACA-20PC Series
Digital, LED-Display Ammeters with Built-in Current Transformers
DATEL's ACA-20PC Series first digital ammeters incorporate onboard current transformers (CT's), they amazingly easy use. Simply pass current-carrying load wire through ACA-20PC's on-board apply power meter's supply terminals, you're instantly measuring currents over four ranges (0-2A with resolution, 0-20A with 10mA resolution, 0-50A 0-100A with 100mA resolution). Absolutely external components, such expensive low-value shunts "donut" CT's, required. Meters powered (120/220Vac 50/60Hz 120Vac 400Hz) powered (+5-40V) impose minimal loads (50mA max. 120mA max., respectively) their supplies. models employ auto-zeroing circuits, precision bandgap references, super stable thin-film resistors unsurpassed accuracy (±0.15%FS) stability. functionally complete ACA-20PC ammeters provide scaling/interface circuitry mate CT's output precision digit) converter. A/D's output goes directly drivers meters' large (0.37"/9.4mm digit height), easy-to-read, displays. ACpowered units have on-board AC/DC converters, wide-range dc-powered units have onboard linear regulators. AC-powered models powered same supply whose current they monitoring. 20A, 85-264Vac, 50/60Hz ("AC1") models feature additional on-board terminal blocks supply power external load. models provide 2000Vdc isolation between measured current their power supply, recognized. Each meter housed subminiature, 1.38" 0.88", epoxy-encapsulated package. Total behind-the-panel installation depth approximately inches.
E156931
Features
Built-in Current Transformers direct measurement 2/20/50/100 Amps Functionally complete: On-board current transformers Scaling/interface circuitry Precision converters Bright displays different models Subminiature, 1.38" 0.88" package Easy-to-read, 0.37"/9.4mm digits powered models: 85-264Vac 50/60Hz 85-140Vac 400Hz "Self-powered" 85-264Vac, models feature built-in load connections +5-40V powered models 2000V isolation; UL/CSA recognized
Figure ACA-20PC Series Simplified Schematic
DATEL, Inc., Mansfield, 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 E-mail: sales@datel.com Internet: www.datel.com
ACA-20PC Series
Performance/Functional Specifications Typical +25°C, unless otherwise noted. Full-Scale Current (45-450Hz) Min. ACA-20PC-1-XXX-XX ACA-20PC-2-XXX-XX ACA-20PC-3-XXX-XX ACA-20PC-4-XXX-XX Overcurrent Rating Performance Sampling Rate Accuracy Measurement Type Temperature Drift +60°C) Zero-Current Reading Power Supply Voltage ACA-20PC-X-AC1-RL ACA-20PC-X-AC2-RL ACA-20PC-X-DC1-RL Power Supply Current ACA-20PC-X-AC1-RL ACA-20PC-X-AC2-RL ACA-20PC-X-DC1-RL Power Supply Terminal Block +4.75 -001 Typ. Max. 1.999 19.99 50.0 100.0
Units Amps Amps Amps Amps
Physical/Environmental Weight: ACA-20PC-1-XXX-XX ACA-20PC-2-XXX-XX ACA-20PC-3-XXX-XX ACA-20PC-4-XXX-XX ounces grams) ounces grams) ounces grams) ounces grams)
rated full-scale current samples second ±0.15%FS counts Sine wave input, full-wave averaging, calibrated ±0.2 ±0.4 Counts/°C Counts Vac@47-99Hz Vac@350-450Hz
ACA-20PC-1-AC1-RL ACA-20PC-2-AC1-RL have 4-position on-board terminal blocks. other models have 2-position terminal blocks. Specified full-scale currents those passing through built-in CT's primary (load) circuit, over frequency 45-450Hz. Overcurrent Rating continuous rating that applies measured load current. does apply circuitry external meter. Accuracy guaranteed rated current. ACA-20PC-2-AC1-RL, load connected meter's on-board 4-position terminal block, full scale range requires 12AWG solid copper wire connections. 14AWG solid copper wire used, current should limited 15A. Figure specified maximum power supply currents steady-state values. AC-powered models draw higher surges initial turn-on. Maximum reverse polarity protection "DC1" models -40Vdc.
Dielectric Withstanding Voltage 2000
Ordering Information
mA@47-99Hz mA@350-450Hz mAdc
20PC
(45-450Hz) Input Range: 1.999A 19.99A 50.0A 100.0A Color: Standard Green Standard
ACA-20PC-1-AC1-RL ACA-20PC-2-AC1-RL ac-powered models with 4-position terminal blocks): Wire Size Type Insulation Strip Length Screw Tightening Torque Maximum Rated Current Maximum Rated Voltage 12-20AWG (solid), 14-20AWG (stranded) 0.25 inches pound-inches (0.5Nm) with 12AWG solid wire; with 14AWG solid stranded wire 630V (VDE 0110-V. Group 250V (VDE 0110-V. Group
Power Supply: 85-264Vac@50/60Hz 85-140Vac@400Hz +5-40Vdc
Accessories: DMS-20-CP Panel cutout punch
DMS-BZL4 bezel assembly with sealing gasket supplied with each ammeter.
ACA-20PC-X-XXX-XX (All other dc-powered models with 2-position terminal blocks): 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 Polycarbonate 1.38"W 0.88"H Depth model dependent (see Mechanical Specifications) digit LED, 0.37"/9.4mm digit height Fixed, model dependent 16-24AWG (solid stranded) 0.25 inches pound-inches (0.4Nm)
Technical Notes IMPORTANT! ensure safe reliable operation, ACA20PC ammeters must installed serviced qualified technical personnel. Contact DATEL there doubt regarding ammeter installation and/or operation. Measurement Type: ACA-20PC ammeters employ full-waverectified, average responding, rms-calibrated circuit measure stepped-down output their on-board, current transformer (CT) Stated accuracy specifications measured using sine-wave current close specified full scale input level, nominal line frequency. Calibration: Periodic recalibration ACA-20PC ammeters required under normal, indoor operating environments. user calibration necessary, should performed qualified technical personnel. Calibration performed with potentially lethal voltages applied ACA-20PC associated wiring, with specified full-scale current flowing through ammeter's built-in current transformer. plastic, fully insulated adjusting tool must used
E-mail: sales@datel.com Internet: www.datel.com
DATEL, Inc., Mansfield, 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
ACA-20PC Series
access recessed calibration potentiometer located back meter (see Mechanical Specifications). Contact DATEL additional information required regarding calibration, setup, other technical issue pertaining ACA-20PC. Wire Gauges Fusing: Wires specified Functional Specifications section must used making connections ACA-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. particular, special attention must paid ACA-20PC-1-AC1-RL ACA-20PC-2-AC1-RL ac-powered models when their built-in auxiliary terminal block connections (TB1) used supply current external load. 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. ACA-20PC-3-ACX (0-50A range, ac-powered) ACA-20PC-4ACX (0-100A, ac-powered) models' used only powering meters' internal circuitry. must used supply current external loads. supply wires feeding these meters must also fused according current rating wire gauge being used, accordance with applicable regulatory codes. 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. Panel Installation connections ACA-20PC Series ammeters must made after ammeter securely attached panel with load supply voltages de-energized (off). Care should exercised when passing load-carrying conductor through meter's built-in particularly when larger-gauge conductors used. position installed wire should such that minimal forces applied built-in TB1, ammeter itself. high-vibration environments, adequate strain reliefs used load supply wiring. ensure secure panel-mount installation, DATEL recommends using
Step
Supply Polarity Grounding: supply inputs, TB1-A TB1-B, ac-powered ammeters themselves polarity sensitive, that they have internal designations. Also, ac-powered ACA-20PC ammeters include require connection earth/chassis ground. However, many applications, external loads which connected directly ACA-20PC's builtin auxiliary terminal blocks must wired with proper polarity connected earth/chassis ground. Connector Torque Ratings: important tighten TB1's screw terminals their rated torque specifications pound-inches (0.5Nm) four-terminal ammeters (ACA-20PC-1-AC1-RL ACA20PC-2-AC1-RL), pound-inches (0.4Nm) two-terminal ammeters. Proper tightening will minimize connector losses ensure safe, reliable operation. Model (ACA-20PC-4-XXX): This model's built-in current transformer requires larger panel cutout width dimension. Mechanical Specifications more information. DC-Powered Models: DC-powered models draw minimal supply currents 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. course, this isolation rating only applies applications which load wiring (i.e., wire passing through CT's center hole) does connect directly indirectly TB1-A TB1-B.
DMS-BZL4 bezel assembly (with sealing gasket) supplied with each ammeter. Also, please note that ACA-20PC-4-XXX 100A oversize requires larger panel-cutout width 1.350" (34.3mm). Mechanical Specifications detailed cutout ammeter dimensions. Following four-step sequence shown Figure below -being careful apply excessive force twisting motions-insert ammeter into panel opening. When using DMS-BZL4 bezel assembly, 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
DATEL, Inc., Mansfield, 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 E-mail: sales@datel.com Internet: www.datel.com
ACA-20PC Series
Typical Wiring Diagrams
Panel Cutout Bezel Installation
First pass carefully dress external load wire through onboard (L1). Then connect supply load wires shown. required, verify that correct line-power polarities applied external load (see Technical Note Ensure wires stripped terminals torqued correctly. proper operation, pass only load wire through on-board CT's center hole.
Figure 20A, 85-264V AC-Powered Models With Auxilliary Load Connections
Figure Other AC-Powered Models
Dimensions ACA-20PC-4-XXX 100A model.
E-mail: sales@datel.com Internet: www.datel.com
Figure DC-Powered Models
DATEL, Inc., Mansfield, 02048 (USA) Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
ACA-20PC Series
Mechanical Specifications
Mechanical Dimensions: Inches (mm) Tolerances: ±0.02 (±0.51), ±0.010 (±0.254)
ACA-20PC-1 2-AC1-RL
20A, 85-264V ac-powered models
ACA-20PC-1
20A, other models
ACA-20PC-3 Series
models
ACA-20PC-4 Series
100A models
9001
REGISTERED DS-0447C 5/2003
DATEL, Inc. Cabot Boulevard, Mansfield, 02048-1151 Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Internet: www.datel.com Email: sales@datel.com
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Bretonneux, France Tel: 01-34-60-01-01 DATEL GmbH Germany Tel: 89-544334-0 DATEL Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DATEL 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. DATEL logo registered DATEL, Inc. trademark.

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