Mx37y_Technical_Description_ENG_v2.00.doc
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─ Single- and three-phase electronic meters with built-in DLC
modem, GSM/GPRS modem or RS485 comm. interface
Mx37y – Single- and Three-phase
electronic meters
The Mx37y single- and three-phase electronic meters
are designed for measuring and registration of active,
reactive and apparent energy in single phase or in
three-phase four- or three-wire network for direct and
indirect connection. Measuring and technical
characteristics of meters comply with the IEC 62052-
11 and IEC 62053-21 international standards for
electronic active energy meters, class 1 or 2 (MID,
class B or A) , and reactive energy meters, classes 2
or 3 in compliance with IEC 62053-23 as well as a
standard for time switches IEC 62052-21.
Measuring and technical characteristics of the meters
also comply with the MID standards: EN 50470–1
(Electricity metering equipment - General
requirements, tests and test conditions - Metering
equipment: class indexes A, B and C) and EN
50470–3 (Electricity metering equipment - Particular
requirements - Static meters for active energy: class
indexes A, B and C).
Meters are designed and manufactured in
compliance with the standards and ISO 9001 as well
as more severe Iskraemeco standards.
The Mx37y meters are the third generation of
Iskraemeco electronic single- and three-phase
meters for a deregulated market of electric power,
with the following common functional properties:
• Time-of-use measurement of active energy
and maximum demand (in up to 4 tariffs)
• Load-profile registration
• LCD in compliance with the VDEW
specification
• Internal real-time clock
• Two push-buttons: Reset and Scroll
• Optical port in compliance with the IEC
62056-21 standard for local meter
programming and data downloading
• Built-in interface or a modem for remote
meter programming and data downloading
• Impulse output
• M-Bus – multi-utility (option)
• Plug-in switching device (option)
• Prepayment functionality (option)
• Limitation of supplied energy or power
(option)
• Code red (option)
• Remote connection and disconnection of
energy supply to individual customers
(option)
The first generation of Iskraemeco electronic meters
for a deregulated market of electric power, i.e. the
Mx42y meters were provided with RS232 or RS485
interface for remote two-way communication, and
utilized IEC 62056-21, mode C communication
protocol.
The second generation of Iskraemeco electronic
meters for a deregulated market of electric power, i.e.
the Mx351 were provided with an integrated DLC
modem for two-way communication via low voltage
distributions network - or upon request - RS485
interface instead, for remote two-way communication.
It utilized the DLMS communication protocol in
compliance with the IEC 62056-51 standard as well
as IEC 62056-21, mode C protocol. These meters
had the following additional functional properties:
• Indication of incorrect connection,
• Bistable relay for demand control
• Two S0 impulse inputs (option).
The third generation of Iskraemeco electronic single-
and three-phase meters for a deregulated market of
electric power consists of Mx37y meter types: with
built-in DLC communication channel (Mx371) or
GSM/GPRS modem – or upon request – with RS485
interface instead (Mx372), for remote two-way
communication.
The meter utilizes the DLMS communication protocol
in compliance with the IEC 62056-46 standard as well
as IEC 62056-21, mode C protocol. Further to the
Mx37y meters functionality they also include:
• Detectors of the meter and the terminal cover
opening
• Switching device for remote disconnection /
reconnection at the customer premises
(option)
• M-Bus for reading other meters (heat, gas,
water)
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