25kV Polymeric Insulators for Railways – overcoming Sea Salt flashover problems0 pages

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Polymeric Insulators

nn25kV Polymeric Insulators for Railways overcoming Sea Salt flashoverproblems nn

WT Henley Ltd. has, during its 30 yearsof servicing the utility market with its
EPDM clad composite insulators, gained
a wealth of field experience in a varietyof environmental conditions. We have supplied our extensive range ofEPDM based polymeric insulators to the4 major continents of the world, from
the iced expanses of Canada, to thedesert conditions of the Sudan. Duringthis time, WT Henley has successfully
engineered their insulators to cope withanything our prospective customers haverequired, whether that is a particular
specification, product test regime, or a
specific environmental condition.
Some of the harshest environments WT Henley has encountered are thoseof the Ayrshire coast in Scotland. At thisparticular location the 25kV electrified
railway catenary network runs parallelwith the coast for some 20 miles. As a result, the overhead system is
continually subjected to a sea saltenvironment. At its worst, the sea-waves crash over the catenary system. To help overcome flashover problemsunder these conditions when using
traditional ceramic insulator technology,washing, replacement and / or anincreased number of units are required.
In using WT Henley֒s polymeric
technology with its open profile design,50mm/kV creepage and unique EPDM
cladding formulation the flashoverproblem can be dramatically reduced.WT Henley is presently into a successfulsite trial in the area. To date thecustomer has not experienced any
system outage due to WT Henleyspolymeric insulators flashing over. Under the harshest environmentalconditions only the best-engineeredproducts will produce the system
reliability desired by the train / networkoperators.

nnA Subsidiary of TT electronics plc nn

WT Henley Limited

Silver Key, Church Manorway, Belvedere, Erith, Kent DA8 1EX, UK, Tel: +44 (0) 1322 444500www.wt-henley.com Email: sales@wt-henley.com >
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