Track Eprotect operation
RSO/PIC Waypoint zone (300m)
Speed Check (50kmph) Loco GPS inaccuracy (± 30m)
KMC linked to Tranzlog GPRS data link to KMC
detection unit with a communications link to the worksite that activates audible and visual alerts. We realised quickly that these existing
products do not meet our needs so we developed our own electronic worksite protection system creating a concept called the simplified Electronic Worksite Protection System (Eprotect). Eprotect detects whether a locomotive has failed to stop before reaching the stop board. If this occurs, it will automatically activate the emergency brakes on the locomotive, bringing the train to a forced stop, thereby providing an independent backup to the driver.
Work Group Work Area
The current manual CSP system has a significant element of human involvement which encompasses voice communications, and relies on the driver paying attention and worksite protection staff setting up the boards. All of these create opportunities for error and resultant safety issues. Consequently, KiwiRail management and staff are working with the Rail and Maritime Transport Union (RMTU) to substantially remove the hazard of unauthorised trains overrunning into CSP worksites. There is an unacceptable number of incidents a year that arise from the
current protection system. These occur either through trains proceeding beyond stop boards when unauthorised, or when trains are authorised to enter worksites that are not clear of personnel or equipment. This initiative is the first step in removing these safety issues. The new system’s technology centres
around the Kupe Mobile Controller (KMC) and the Tranzlog equipment currently installed on locomotives. This has been designed and manufactured to our specifications by two local companies, Xworks and Otari Electronics. GPS monitoring, facilitated by the KMC, which has previously been
Maintenance gangs are often vulnerable when working on the track, so any form of added protection is welcome. 24
IRJ December 2012
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