TE’s surge arrester frees up valuable train rooftop space

06 November 2019

TE Connectivity (TE) is introducing the RSTI 68 for the railway sector, which, it says, can be mounted directly on the transformer and free up the rooftop.

The firm says it is fully tested against shock, vibration and meets the fire and smoke norms of EN45545-2.

It further claims that the ever-growing number of double decker trains means high products on rooftops can create challenges with tunnels and bridges.

However, it’s not just about height; roof space on trains in general comes at a premium as more components need to be placed on rooftops – several of them requiring free space around them too, according to TE.

TE says 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.

The product is designed for a sealed HV system, “giving maximum design freedom in its vicinity”.

What’s more, TE says that for trains using the new Lopro circuit breaker, this secondary surge arrester can even be placed directly on it, “creating even more configuration freedom in the HV system”.

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