Jumpers link HV supplies between rail cars
An
Icore International product story
Edited by the Engineeringtalk editorial team
May 19, 2003
A new range of flexible jumpers provides a safe, effective and economical solution for linking the rooftop busbar systems of adjacent cars in trains that are powered from overhead cables.
A new range of flexible jumpers from Icore International provides a safe, effective and economical solution for linking the rooftop busbar systems of adjacent cars in trains that are powered from overhead cables.
Designed specifically for this application, the jumpers consist of a sprung tube containing a conductor element terminated at each end with an elbow connector.
In the unlikely event of the link being severed while in use, the sprung design ensures that the free ends take up a position away from the cars, which minimises the possibility of any hazard to passengers.
Standard versions of Icore's high-voltage jumpers are intended for use with rail cars which have a nominal spacing of 400mm, and they can accommodate changes in spacing from 230 to 680mm while the vehicle is in motion.
The jumpers can also be modified to suit specific applications.
The conductor elements and the springs used in Icore's jumpers are constructed to withstand continuous flexing, and to offer an exceptionally long service life.
A weather-resistant neoprene over-sheath is also incorporated to provide additional protection.
The jumpers are fast and simple to fit and, while they are designed to provide permanent connections between adjacent cars, they also allow fast disconnection when cars need to be unhitched.
The electrical characteristics of the jumpers are, in most cases, tailored to suit the user's individual requirements, but typical products have a contact resistance of less than 0.01ohm, and a current rating of around 450A.
The jumpers can also accommodate high surge currents - typically up to 45kA - and have an excellent short-circuit withstand capability.
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