Introduction - Elster A1140 User Manual

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A1120/40 - Electronic Polyphase Meter
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INTRODUCTION

The A1120/40 has been designed to meet the changing needs of the Electricity Supply Industry.
The meter offers a 'modular' solution for remote communications, allowing the meter to be
integrated into an AMR system at any time. Flexibility in communications provides the Utility with
the means to employ the most cost effective communications method. The RJ11 connector
provides power for a modem removing any requirement for external connections.
The modem fits neatly under the terminal cover providing a high degree of protection against
fraud or tampering.
Communications are provided via the optical (IEC 62056-21) port and are supported by data
stream mode, allowing fast reading of meter data. The A1140 permits up to 90 days of load
profile data to be collected in less than 30 seconds. The RJ11 socket provides optional RS232
communications allowing remote access to the same data as the optical port. This port can be
multi-dropped, allowing access to up to 10 meters in a single installation. A further option allows a
pulsed output to be transmitted via the meter's auxiliary terminals.
The meter is available in a number of variants that measure combinations of active energy, four
quadrant reactive energy and kVAh. Two customer defined registers can be used to summate
energy from any like unit registers. Instrumentation quantities to aid installation can be included in
the display sequence.
Firmware Version C allows 12 External Registers to display data from an external source such as
a gas or water meter. The registers are written to by an intelligent source via the RS232 port.
The meter offers extensive security data which includes a programming log with user ID.
Further security can be provided as an option with terminal cover and main cover removal
detection. As an alternative option, the latter detection switch can instead be used to allow the CT
ratio to be changed.
The Liquid Crystal Display (9.8mm) has large characters that can be viewed from a wide angle.
The display sequence is programmable and can be auto-cycle, step or utility. Displayed
information can have English language identifiers or OBIS (Object Identification System) codes.
The OBIS codes can be changed via the Power Master Unit.
TM
Power Master Unit software provides a user-friendly Windows graphical interface for
programming the meter and reading meter data.
The meters are approved to:
EN 62053-21/22 for kWh accuracy - Class 0.5s, 1 or 2
EC Directive 2004/22/EC (MID) - Class A, B or C
EN 62053-23 for kvarh accuracy - Class 2 or Class 3
The meter has an ingress protection rating of IP53 to IEC 60529:1989.
The following main variants of the meter (configured at manufacture) are available:
Import kWh
Import kWh, Q1 and Q4 kvarh
Import kWh, Q1, Q2, Q3, Q4 kvarh, kVAh 1
Import/Export kWh
Import/Export kWh, Q1, Q2, Q3, Q4 kvarh
Import/Export kWh, kVAh 1-2
Import/Export kWh, Q1, Q2, Q3, Q4 kvarh, kVAh 1-2
© Elster Metering Limited - M181 001 2G - 5/2010