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About This Item
Full Description
Filters operating at railway system voltage (for example, for harmonic suppression or power factor correction) are not included in this standard since each site has special requirements. Filters would normally have separate enclosures with separate rules for access. If electromagnetic limits are required, these will appear in the specification for the equipment.
If a port is intended to transmit or receive for the purpose of radio communication (intentional radiators, e.g. transponder systems), then the radiated emission requirement in this standard are not intended to be applicable to the intentional transmission from a radio-transmitter as defined by the ITU.
The frequency range considered is from DC to 400 GHz. No measurements need to be performed at frequencies where no requirement is specified.
Emission and immunity limits are given for items of apparatus which are situated:
- a) within the boundary of a substation which delivers electric power to a railway;
- b) beside the track for the purpose of controlling or regulating the railway power supply, including power factor correction;
- c) along the track for the purpose of supplying electrical power to the railway other than by means of the conductors used for contact current collection, and associated return conductors. Included are high voltage feeder systems within the boundary of the railway which supply substations at which the voltage is reduced to the railway system voltage;
- d) beside the track for controlling or regulating electric power supplies to ancillary railway uses. This category includes power supplies to marshalling yards, maintenance depots and stations;
- e) various other non-traction power supplies from railway sources which are shared with railway traction.
- vital equipment such as protection devices;
- equipment having connections to the traction power conductors;
- apparatus inside the 3 m zone;
- ports of apparatus inside the 10 m zone with connection inside the 3 m zone;
- ports of apparatus inside the 10 m zone with cable length > 30 m.
Excluded from the immunity requirements of this standard is power supply apparatus which is intrinsically immune to the tests defined in Tables 1 to 6.
NOTE An example is an 18 MVA 230 kV to 25 kV power supply transformer.
These specific provisions are to be used in conjunction with the general provisions in EN 50121-1.
Cross References:
EN 50121-1:2017
EN 50121-2:2017
EN 61000-4-2:2009
IEC 61000-4-2:2008
EN 61000-4-3:2006
IEC 61000-4-3:2006
EN 61000-4-4:2012
IEC 61000-4-4:2012
EN 61000-4-5:2006
IEC 61000-4-5:2005
EN 61000-4-6:2009
IEC 61000-4-6:2008
EN 61000-4-8:2010
IEC 61000-4-8:2009
EN 61000-4-18:2007
IEC 61000-4-18:2006
EN 61000-6-4:2007
IEC 61000-6-4:2006
EN 55016-1-1:2010
CISPR 16-1-1:2010
EN 50124-1:2001
EN 61000-3-2:2014
IEC 61000 3 2:2014
EN 61000-3-3:2013
IEC 61000-3-3:2013
EN 61000-3-11:2000
IEC 61000-3-11:2000
EN 61000-3-12:2011
IEC 61000 3 12:2011
EN 61000-6-2:2005
2014/30/EU
IEC 61000-6-2:2005
All current amendments available at time of purchase are included with the purchase of this document.
Document History
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BS EN 50121-5:2017+A1:2019
Railway applications. Electromagnetic compatibility-Emission and immunity of fixed power supply installations and apparatus- Most Recent
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BS EN 50121-5:2017
viewing
Railway applications. Electromagnetic compatibility-Emission and immunity of fixed power supply installations and apparatus- Historical Version
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BS EN 50121-5:2015
Railway applications. Electromagnetic compatibility-Emission and immunity of fixed power supply installations and apparatus- Historical Version
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BS EN 50121-5:2006
Railway applications. Electromagnetic compatibility-Emission and immunity of fixed power supply installations and apparatus- Historical Version
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BS EN 50121-5:2000
Railway applications. Electromagnetic compatibility-Emission and immunity of fixed power supply installations and apparatus- Historical Version
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BS DD ENV 50121-5:1996
Railway applications. Electromagnetic compatibility-Fixed power supply installations- Historical Version