SIEMENS
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Siemens KT 10.1 · 2016
15
Technical information and configuration
Supply systems data, line-side connection
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Overview
Supply systems data
When dimensioning and selecting plant components, the supply
systems data, supply system conditions and operating modes
must be taken into account for these components.
The most important data for a supply system include the rated
voltage and rated frequency. These data for the supply system
are designated as rated values in accordance with international
agreements.
Usual rated voltages and rated frequencies
In Europe the EN 60038 standard "CENELEC standard voltages"
applies.
The international standard IEC 60038, Edition 7, 2009, "IEC stan-
dard voltages" was substantially included in this standard.
The IEC 60038 standard is the result of an international agree-
ment to reduce the diverse rated voltage values that are in use
for electrical supply networks and traction power supplies, load
installations and equipment.
In the low-voltage range, it is emphasized in IEC 60038 that
the 220 V/380 V voltages (formerly in continental Europe) and
240 V/415 V voltages (formerly in the UK) for three-phase elec-
tricity supplies have been replaced by a single standardized
value of 230 V/400 V. The network frequency in Europe is 50 Hz.
The tolerances for the rated voltages of the supply systems that
were specified for the transition period up to 2003 were intended
to ensure that equipment rated for the existing voltages could be
operated safely until the end of its service life.
Conversion of low-voltage systems
Supply voltages in excess of 400 V (e.g. 500 V, 690 V) are only
used in Europe in large industrial concerns.
The IEC recommendation 230 V/400 V has been implemented as
a national regulation in the most important countries, as far as
the conditions in the country allow.
In North and Central America and some northern nations in
South America the rated value of the AC mains supply is 120 V;
the doubled mains voltage of 240 V is common among larger
consumers. As a rule, the low-voltage networks in these coun-
tries are implemented as single-phase three-wire networks. A
three-phase alternating current is often not available to smaller
users, if at all, so the voltage is 208 V or 415 V, while three-phase
networks at 480 V are usual for larger consumers. The network
frequency is 60 Hz.
In Asia AC mains voltages of 100 V or 110 V (50 Hz or 60 Hz) are
also the norm.
In addition, numerous country-specific and regional peculiarities
exist around the world, details of which can be obtained from the
local operators if necessary.
International supply voltages and frequencies in low-voltage
systems
1)
Industry only
2)
No further expansion
Year
Rated voltage
Tolerance range
Up to 1987
220 V/380 V
-10% to +10%
1988 to 2003
230 V/400 V
-10% to + 6%
Since 2003
230 V/400 V
-10% to +10%
Country
Line voltage
Western Europe:
Belgium
50 Hz 230/400 – 127-220 V
Denmark
50 Hz 230/400 V
Germany
50 Hz 230/400 V
Finland
50 Hz 230/400-500
1)
– 660
1)
V
France
50 Hz 127/220 – 230/400 – 500
1)
– 380/660
1)
– 525/910
1)
V
Greece
50 Hz 230/400 – 127/220
2)
V
Great Britain
50 Hz 230/400 V
Ireland
50 Hz 230/400 V
Iceland
50 Hz 127/220
2)
– 230/400 V
Italy
50 Hz 127/220 – 230/400 V
Luxembourg
50 Hz 230/400 V
The Netherlands
50 Hz 230/400 – 660
1)
V
Northern Ireland
50 Hz 230/400 – Belfast 220/380 V
Norway
50 Hz 230-230/400-500
1)
– 690
1)
V
Austria
50 Hz 230/400 – 500
1)
– 690
1)
V
Portugal
50 Hz 230/400 V
Sweden
50 Hz 230/400 V
Switzerland
50 Hz 230/400 – 500
2)
V
Spain
50 Hz 230/400 V
Eastern Europe:
Albania
50 Hz 230/400 V
Bulgaria
50 Hz 230/400 V
Russian Federation
50 Hz 230/400 – 690
1)
V
Croatia
50 Hz 230/400 V
Poland
50 Hz 230/400 V
Romania
50 Hz 230/400 V
Serbia
50 Hz 230/400 V
Slovakia
50 Hz 230/400 – 500
1)
– 690
1)
V
Slovenia
50 Hz 230/400 V
Czech Republic
50 Hz 230/400 – 500
1)
– 690
1)
V
Hungary
50 Hz 230/400 V
© Siemens AG 2016