Products
RWHN - SSP - Download PDF
Rail Web Heaters
Application: Switch Rail Snow and Ice Melting
RWHN heaters are an integral part of RHPS’s
transportation snow and ice melting systems. Designed
specifically for rail switch heating, RWHN heaters are
designed for ease of installation and operation.
The RWHN heaters have a flat, flexible heating surface
that conforms to the web of the rail, to provide
maximum heat transfer from the heater to the rail. This
allows RWHN heaters to operate at a lower watt density
then traditional calrods thus increasing the heater’s life
span and lowering the operating costs.
Design. . .
RWHN’s are manufactured to meet the specific user’s
needs based on the available power supply. A typical
design will include a review of the rail and switch profiles to determine the power requirements for the specific application. The heaters are designed to operate at a nominal 1.2 watts per square centimeter of heater contact surface at the specified voltage. Note: RWHN heaters use electrical parallel path lead configuration. Typical voltages 110 to 480 Vac.
PRODUCT SPECIFICATIONS
Installation. . .
RWHN heaters are rugged, yet flexible enough to adapt
to the requirements of rail switch installations. RWHN’s
are fastened to the rail with easy to install spring clips.
The standard electrical connection are simple crimp type
connectors, isolated with Teflon tape and sealed with
shrink tube making heater-to-heater and heater-to-
power connections fast, easy and watertight but any
NEC approved connection device may be specified.
Construction. . .
The RWHN heater is manufactured to withstand the
hostile atmosphere of railway switches. It is composed
of a parallel path, heating element that is encapsulated
between two layers of high temperature fiberglass
reinforced silicone rubber. The encapsulated element is
backed with a layer of high temperature silicone foam
insulation, to ensure maximum heat transfer into the
rail. These components are then housed in a durable
stainless steel enclosure. These assemblies are available
in 50mm wide (tall) by 250, 500 and 1000mm long
models. The 150 & 300mm long lead wires are protected
with stainless steel armorflex.
Rail Heating Products & Services 108 Linda Dr., San Marcos TX 78666 Telephone (512) 396-4328