Tubular electric heaters for switches
Switch electric heaters are intended for switches of the railroads in the areas with temperate and cold climate for operation under temperatures from –40C to +7C.
Switch electric heater represents a metal body of flat-oval section with a spiral made of high ohmic resistance wire. The heating element is insulated from the shell by filler material (periclase). Current supply wire is made in frost resistant version with the length of 4 m connected to contact terminals of electric heater through the hermetically sealed sleeve preventing penetration of moisture to the contacts and inside the switch electric heater.
This type of switch electric heaters is used with rails P50. P65.
Switch electric heater are designed for heating in contact with the stock rail bottom, that is, in metal-air medium. Prolonged operation of electric heater in the air without heat transfer is not permitted!