Surge arrester from TE Connectivity opens up space on train rooftops

A surge arrester for the railway market has been developed by TE Connectivity to be mounted directly on the transformer to save space on the train’s rooftop. The surge arrester is fully tested against shock and vibration, and meets the fire and smoke norms of EN45545-2.

Double decker trains are proving popular but high products on rooftops can create challenges with tunnels and bridges, points out TE Connectivity. The height of the train is one consideration but designers also have to bear in mind that the roof space on trains in general comes at a premium as more and more components need to be placed on rooftops, several of them requiring free space around them, advises TE Connectivity.

Additionally, cleaner rooftops improve aerodynamics, especially for high-speed trains.

The RSTI 68 surge arrester can be placed directly on the transformer and also at the rear side of the high voltage (HV) cable assembly that connects to the transformer. It  fits in a sealed HV system, giving maximum design freedom in its vicinity. For trains using the new Lopro circuit breaker, this secondary surge arrester can even be placed directly on the circuit breaker, creating even more configuration freedom in the HV system, says TE.

The short circuit current is 20kA and the product is tested for 15kV and 25kV AC track systems.

TE Connectivity is a global technology and manufacturing company with more than 75 years’ experience in connectivity and sensor solutions, proven in the harshest environments. Its portfolio of products has enabled advancements in transportation, industrial applications, medical technology, energy, data communications, and the home, according to TE. It has 80,000 employees, including more than 8,000 engineers, working alongside customers in approximately 140 countries.

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