A3_ALPHA_meter_data_sheet.pdf
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The A3 ALPHA Meter Elster Electricity’s A3 ALPHA meter builds upon the strengths of existing ALPHA meter designs. Like its predecessors, the A3 ALPHA meter uses Elster Electricity’s patented digital measurement techniques that offer high accuracy, repeatability, and low ownership costs. In support of open architecture standards, the A3 ALPHA meter is the first Elster Electricity meter with full ANSI C12.18, C12.19 and C12.21 communication protocol support. Other features include advanced four quadrant metering, transformer and line loss compensation, and interval data recording of instrumentation values. Interval Data Recording and Self Reads The main circuit board in the A3 ALPHA meter has more than 40 KB of nonvolatile memory for storing profile, data logs, and self read data. Recording options include interval profiles of instrumentation data and up to 15 self reads. Additionally, an extended memory option board can be easily added to increase total memory by 1 MB. When the optional instrumentation profiling is enabled, the A3 ALPHA meter stores two separate sets of instrumentation data. Each data set has an independent interval length and up to 16 channels (32 total). With instrumentation profiling, each meter becomes a powerful data collection tool to monitor data and diagnose problems without installing expensive temporary monitoring equipment. One of over 50 instrumentation quantities can be assigned to each channel, and the storage algorithm for each channel can be independently selected. Four storage algorithms are available: • minimum value per interval • maximum value per interval • average value per interval • end of interval snapshot Instrumentation Each A3 ALPHA meter, including the most basic demand version, can display over 50 different instrumentation quantities. With this highly integrated capability, the A3 ALPHA meter can provide the equivalent function of all of the following devices: • voltmeter • wattmeter • VA meter • distortion indicator • ammeter • VAR meter • phase angle meter • phase rotation indicator Revenue Metering The A3 ALPHA meter is a very accurate revenue meter (0.2 accuracy Class). Existing ALPHA meter users will find the basic A3 ALPHA meter types familiar. The A3 ALPHA meter provides advanced four quadrant revenue functions, transformer and line loss compensation, and increased data profiling without adding hardware option boards. A3 ALPHA ® Meter Meter type No. of measured quantities A3D 1 (Watthours only) A3T 1 (Watthours only) A3Q, A3K, A3R 2 (user configurable selections) A3QA, A3KA, A3RA 6 (user configurable selections) Each measured quantity is stored in nonvolatile memory and includes energy, demand, and TOU data. Note. TOU data is not available for A3D. Technology to Empower Utilities
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Transcript of A3_ALPHA_meter_data_sheet.pdf
The A3 ALPHA MeterElster Electricity’s A3 ALPHA meter builds upon the strengths ofexisting ALPHA meter designs. Like its predecessors, theA3 ALPHA meter uses Elster Electricity’s patented digitalmeasurement techniques that offer high accuracy, repeatability,and low ownership costs. In support of open architecturestandards, the A3 ALPHA meter is the first Elster Electricitymeter with full ANSI C12.18, C12.19 and C12.21communication protocol support. Other features includeadvanced four quadrant metering, transformer and line losscompensation, and interval data recording of instrumentationvalues.
Interval Data Recording and Self ReadsThe main circuit board in the A3 ALPHA meter has more than40 KB of nonvolatile memory for storing profile, data logs, andself read data. Recording options include interval profiles ofinstrumentation data and up to 15 self reads. Additionally, anextended memory option board can be easily added to increasetotal memory by 1 MB.
When the optional instrumentation profiling is enabled, theA3 ALPHA meter stores two separate sets of instrumentationdata. Each data set has an independent interval length and up to16 channels (32 total). With instrumentation profiling, eachmeter becomes a powerful data collection tool to monitor dataand diagnose problems without installing expensive temporarymonitoring equipment. One of over 50 instrumentationquantities can be assigned to each channel, and the storagealgorithm for each channel can be independently selected. Fourstorage algorithms are available:
• minimum value per interval• maximum value per interval• average value per interval• end of interval snapshot
InstrumentationEach A3 ALPHA meter, including the most basic demandversion, can display over 50 different instrumentation quantities.With this highly integrated capability, the A3 ALPHA meter canprovide the equivalent function of all of the following devices:
• voltmeter• wattmeter• VA meter• distortion indicator• ammeter• VAR meter• phase angle meter• phase rotation indicator
Revenue MeteringThe A3 ALPHA meter is a very accurate revenue meter (0.2accuracy Class). Existing ALPHA meter users will find the basicA3 ALPHA meter types familiar. The A3 ALPHA meterprovides advanced four quadrant revenue functions, transformerand line loss compensation, and increased data profiling withoutadding hardware option boards.
A3 ALPHA® Meter
Meter type No. of measured quantities
A3D 1 (Watthours only)
A3T 1 (Watthours only)
A3Q, A3K, A3R 2 (user configurable selections)
A3QA, A3KA, A3RA 6 (user configurable selections) Each measured quantity is stored in nonvolatile memory and includes energy, demand, and TOU data. Note. TOU data is not available for A3D.
Technology to Empower Utilities
6.95[177]
0.75[19]
1.35[34]
5.5[139]
6.4[162]
Absolute Maximums Voltage Continuous 528 VAC (AnyPhase option: L-L or L-N)
ANSI C37.90.1 Oscillatory
2.5 kV, 2500 strikes
Fast transient 5 kV, 2500 strikes ANSI C62.41 6 kV at 1.2/50 µs, 10
strikes IEC 61000-4-4 4 kV, 2.5 kHz repetitive
burst for 1 minute
Surge voltage withstand
ANSI C12.1 insulation 2.5 kV, 60 Hz for 1 minute Continuous at Class amperes
Current Temporary (1 second) at 200 % of meter max. current
Operating Ranges Nameplate nominal range
120 V to 480 V Voltage
Operating range 96 V to 528 V Current 0 to Class amperes Frequency Nominal 50 Hz or 60 Hz ±5 % Temperature range -40 °C to +85 °C inside meter cover Humidity range 0 % to 100 % noncondensing
Operating Characteristics Power supply burden Less than 4 W Per phase current burden 0.1 milliohms typical at 25 °C
120 V 0.008 W 240 V 0.03 W Per phase voltage burden 480 V 0.04 W
Accuracy Meets ANSI C12.20 accuracy for accuracy class 0.2 %
General Performance Characteristics
Form 1S and Form 3S 10 mA for Class 20 100 mA for Class 200 160 mA for Class 320
Starting current
All other forms 5 mA for Class 20 50 mA for Class 200 80 mA for Class 320
Creep 0.000A (no current)
No more than one pulse measured per quantity, conforming to ANSI C12.1 requirements
Primary time base Power line frequency (50 Hz or 60 Hz), with selectable crystal oscillator
Secondary time base Meets the ANSI limit of 0.02 % using the 32.768 kHz crystal. Initial performance is expected to be equal to or better than ±55 seconds per month at room temperature
Outage carryover capacity 6 hours at 25 °C. Supercapacitor rated at 0.1 Farads, 5.5 V
Battery (optional) LiSOCl2 battery rated 1000 mAhr, 3.6 V and shelf life of 20+ years. 5 years continuous duty at 25 °C Optical port 300 to 28,800 bps
Communications rate Remote port 1200 to 19,200 bps
ANSI Standards C12.1; C12.10; C12.18; C12.19; C12.20; C12.21
Shipping Weights All values are approximateSingle 5.06 lbs [2.30 kg]
S-base 4-pack 13.46 lbs [6.11 kg] Single 7.38 lbs [3.35 kg]
A-base 4-pack 26.02 lbs [11.82 kg]
S-base
Power Quality MonitoringPower quality monitoring (PQM) provides continuous servicecondition monitoring 24 hours a day. PQM looks for exceptionsto user-defined thresholds for items such as voltage, current, andtotal harmonic distortion. Each of the 12 PQM tests can beconfigured to control relay activation, LCD warning, date/timestamp log entry, and even an automatic telephone call to reportthe condition.
ANSI Communications ProtocolsAs the industry moves to the ANSI communications protocols,more system/communications options will become available,enabling A3 ALPHA meter users to benefit from a morecompetitive environment for data collection and analysis. TheA3 ALPHA meter provides full support for ANSI C12.18,C12.19 and C12.21 communications protocols and datastructures to prepare you for the future.
A Communication EnablerData can be retrieved using the standard optical communicationsport. Additional communications interfaces are available forA3 ALPHA meters as a simple add-on option board:
• 2400 bps internal telephone modem with outage reportingcapabilities
• RS-232• RS-485• external serial interface• 20 mA current loop• internal LAN controller (ILC1)• internal LAN node (ILN1)• Itron 50ESS ERT®
Communications interfaces can be combined with alarmingoptions in the A3 ALPHA meter to permit immediatenotification of critical events.
The relay option boards of all existing ALPHA meters arecompatible with the A3 ALPHA meter. When relay optionboards are used with the A3 ALPHA meter, the relay functionsare fully programmable.
Optional AnyPhase™ Power SupplyWith the optional AnyPhase power supply installed, theA3 ALPHA meter is powered from all wires of the electricalservice. If one or more service wires are disconnected, the meteris automatically powered from any two service wires includingline-to-line or line-to-neutral.
2.56[65]
7.6[193]
10.3[262]
2.5[62]
LOADLINE
6.95[177]
6.4[162]
9.4[238]
A-base
Dimensions in inches [millimeters]. For reference only.Do not use in construction.Elster Electricity, LLC
Raleigh, North Carolina, USA+1 800 338 5251 (US Toll Free)+1 905 634 4895 (Canada)[email protected]
© 2005 by Elster Electricity, LLC. All rights reserved. Information herein is subject tochange without notice. Product specifications cited are those in effect at the time ofpublication. Printed in the United States. Rev. A. August 2005.
A3 ALPHA Specifications and Technical Data
