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Rail
Testing
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Introduction
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With
the increasing introduction of high powered electronic equipment,
together with complex micro controllers and a multitude of other
electronic devices being installed on trains and other rail vehicles,
Electro Magnetic Compatibility within the rail environment has become
a critical issue in every aspect of the design and implementation
of train and rail-associated apparatus. This has subsequently led
to the mandatory requirement that all new railway applications,
including stock (e.g. a single commercial railway unit), traction
stock (e.g. electric and diesel locomotives etc), hauled stock (e.g.
independent passenger coaches and freight wagons), main-line vehicles
(e.g. high speed trains, freight trains etc designed to operate
between cities) and urban vehicles (e.g. underground train sets,
trams, LRVs etc.), must be tested for, amongst other things, compliance
to the European and British Standard, (BS) EN 50121.
The directive EN 50121 addresses the three main aspects of the railway
system that EMC concerns; the effect of the railway system on the
surrounding environment; the effect of the railway system on signalling
and communications equipment; and the ability of railway equipment
and related apparatus to remain unaffected by the inherently severe
environment within which it is intended to operate. It is further
stated that the infrastructure controller and the train/rolling
stock operator must take all reasonable measures to ensure that
their actions and equipment do not compromise reliability due to
EMI, under normal operating procedures.
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To
ensure that these issues are satisfied, and to help alleviate the
concern of Health and Safety in an increasingly hazardous environment,
it is now imperative that any newly introduced rail vehicle and associated
equipment is tested to ensure that both the electromagnetic emissions
and the level of immunity to external EMI are within the specified
limits. This EMC testing now forms a compulsory part of the assessment
undertaken by the small number of Vehicle Acceptance Bodies, within
the UK, that approve all applicable equipment suitable for use on
the nation's extensive rail network. |
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Rail
Related EMC Services
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EMC
Solutions' services include the pre-compliance testing of the electromagnetic
compatibility of Rolling Stock (Train and complete vehicle), and electromagnetic
compatibility of Rolling Stock (Apparatus), EN50121-3-1 and EN50121-3-2
respectively, encompassed by the overall product specification of
EN 50121, to the standards required by VABs to authorise the vehicle
or equipment's suitability for use on the railway. These specifications
can be suitably interpreted and adapted by our fully qualified engineers
to enable their application to any relevant item of rail-associated
equipment. |
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Tests
Required to Satisfy EN 50121
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The
individual tests that form constituent parts of EN 50121, conducted
by EMC Solutions to ensure compliance to the aforementioned standard,
usually include the following elements, (dependant on the type of
vehicle or rail-enabled system under test); |
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SPECIFICATIONS:
(If
appropriate)
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EN55011 Class B
EN61000 - 4 - 6 Level 4
EN61000 - 4 - 4 Level 4
EN61000 - 4 - 2 Level 4
EN61000 - 4 - 3 |
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Radiated
Emissions
Conducted Immunity
Immunity to Fast Transient Bursts
Immunity to Electrostatic Discharge
Immunity to Radiated Fields |
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Advice
and Consultancy Service
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Since
the comprehensive implementation of EN 50121 in April 2000, EMC Solutions
have worked with a number of different companies and clients, including
VABs, vehicle manufacturers, and plant hire companies, etc. to test
and approve a wide range of vehicles, which has subsequently provided
us with a wealth of experience in this specialised field. EMC testing
has been undertaken on vehicles such as; road/rail conversions; lighting
rigs; JCB's; Unimogs; inspection vehicles; and other various brands
and types of specialised vehicle. EMC Solutions is therefore able
to offer a comprehensive and thorough service regardless of equipment
size and type.
Having
over 40 years of experience in the EMC industry, in a wide range
of fields and applications, enables us to provide solutions to any
EMC-related problems that may arise following testing, ensuring
that all apparatus can ultimately be modified or adjusted to comply
with EN 50121, and therefore satisfy the EMC components of the VAB's,
or appropriate body's, assessment of the equipment's suitability
for use on the railway.
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Our
Flexibility to Client's Needs
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EMC
Solutions' engineers are available to test both in-house at our suitably
equipped facilities in the West Midlands, or, taking advantage of
our wide range of portable test equipment, on-site at a customer's
desired location.
We are conveniently located near Birmingham International Train Station
and Birmingham Airport, and are serviced by several major motorways.
With equipment, facilities, accreditations and proven results in Commercial,
Military and International EMC testing, EMC Solutions provide a personalised
service suitably tailored to each client's individual needs, to a
level which is unrivalled within the industry.
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Datasheet
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Right
Click
"Save Target As"
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