Mark 1 Insulators0 pages

25kV AC Polymeric Railway Insulators

Designed to replace porcelain portalinsulators above and below the gantry,these insulators take some of the highestloads of any insulators in railway service.
They can also be used for independent
registration where higher mechanicalloads are being specified e.g. in tunnelapplications where large support tubes
require small deflection characteristics.Specifically designed to meet therequirements of a maximum workingload of 2.713kNm (528kg), insulators in
this range have less than 7mm of
deflection at this maximum load and
have the lowest bending moment of anycompatible insulator on the railway.Malleable iron end fittings (or aluminiumby request) are fully compatible with
existing imperial flanges. High tensile
bolts with all-metal self locking nuts andwashers are supplied as applicable.Lightweight (e.g. A686:17kg) and a lowprofile means that they are easy to
handle and visually less obtrusive than
their porcelain predecessors.Moulded onto high strength GRP rods,these insulators utilise Henleys unique
EPDM dielectric cladding. This highly
successful cladding has been proven
around the world from deserts to arcticenvironments for more than 30 years.The material has outstanding pollution
and weathering performance which,
coupled with its non-flammability, also
makes it ideal for tunnels and stationswhere natural rain-washing is notpossible. ҕNetwork Rail ApprovalNumber PA05/1245TNetwork Rail StandardRT/E/S/21082ՕDirect replacement forporcelain: hollow or solidcoresLess than 7mm deflection atmaximum working loading
of528kg ՕUnique Henley EPDMcladdingmaterialLowest profile of anycantilever insulator in its classՕSupplied with malleable ironend fittings (aluminium on
request)Light weight (17kg withmalleable iron end fittings) >
A subsidiary of TT electronics plc

WT Henley Limited