Residential single phase meter
M550
Electronic single phase meter for residential
application
With the deregulation of the energy market, in combination with a
changing cost situation, new flexible tariff structures and a modern
energy management are required. Remote metering and the standardization process become more and more important. With the adaptation
of the M550 meter, the conditions to match these new requirements
were created.
The M550 meter is available for direct connection. The meter is in accordance with the relevant DIN and IEC standards. for electricity meters. The meter is approved acc. the EN50470 standard (MID).
Features

High accuracy and stability, class B

Up to 12 historical data sets

Back lightened display

Optical interface acc. EN62056-21

DIN terminal block

RS485 interface (optional)

Absolute kWh measurement

OBIS identifier system acc. EN62056-61

Demand measurement


integrated tariff clock, 4 tariffs

time back-up with internal battery

instantaneous measurement (U, I)

readout of meter data according the
EN 62056-21 protocol
log file for registration of all events with
time and date stamps
tariff changes
DST change
Time & date change
Power failure

readout of meter data without main power

load profile 1 channel, 35 days 1h interval
(option)

user friendly reading & setting tool

advanced temperature range (-40 .. 85 C)

Anti-Tampering features, like
- terminal cover opening detection
- main cover opening detection
- reverse run detection
- battery status indication
o
Technical Data
Nominal voltage
Modifications or deviations are reserved R 1.0
2-wire, 1 system
Nominal frequency
Nominal / maximum current
220V or 230V (-20% .. 15%)
50 / 60Hz, +/-5%
Continuous current
Short duration
Starting current
5(60)A, 5(80)A, 5(100)A
3000A for half main cycle
20mA
Accuracy
Class 2 or 1, A or B
EN62053-21
MID app. MI-003
Power supply
Nominal voltage
150V … 300V
Interfaces
Optical interface
Electrical interface
Acc. IEC 62056-21, max 9’600 Baud
RS485 optional, max. 19’200 Baud
Internal tariff source
4 tariffs
8 switching times per day
Acc. EN 62054-21 (former EN 61038)
Real Time Clock
- Time backup
Accuracy
Internal battery
< 5ppm, temperature compensated
> 10 years continuous operation
Shelf time >4 years
Readout without mains power
Internal battery
>10 years
Shelf time > 4 years
Temperature condition
Operating / storage temperature
Humidity
Temperature coefficient
-40 ... +85 / -40 ...+85
0 to 95% rel. humidity, non-condensing
o
0,01% per C (PF=1 and PF=0,5)
EMC compatibility
Surge withstand (1,2/50s)
Dielectric test
EMC environmental conditions
6kV, Rsource = 2Ohm
10kV, Rsource = 500Ohm *)
4kV, 1min, 50Hz
MID E2
Mechanical compatibility
Mechanical class
M1
LCD
Number of digits for energy
Digit size
Back lightened
9
8mm
yes
Connections
Direct connected meter
Terminals: Ø=7,0mm
Housing
Dimensions
Protection class
Material
Mechanical
DIN 43857 part 1
Housing: IP54, terminal block: IP31
Polycarbonate, non-inflammable, selfextinguishing synthetic material, recyclable
Weight
o
o
o
o
<0,4 kg
*) only between main terminals
Elster Solutions GmbH
Steinern Straße 19-21
55252 Mainz-Kastel
Germany
Phone +49 (0) 6134 / 605-777
Fax
+49 (0) 6134 / 605-750
e-info@elster.com
www.elstersolutions.com