Arnheim, Netherlands

Delivery: 1997

Trolleybuses are a standard and popular means of transport in Arnhem. People do appreciate the ecological advantages of the electrical power. Not without reason, the city of Arnhem calls itself "Trolley city".

Considering the large number of passengers, the transit authority of Arnhem Oosnet Group N.V. decided to newly organise the public transport implying the replacement of solo buses by modern low-floor articulated buses.

Modifying the previously built articulated dual mode bus AG 300 T, Kiepe developed a modern trolley bus. We attached great importance to the low weight and the high availability of the bus in daily operation.

The complete electrical equipment of the bus was designed by Kiepe. In addition to the well-proven components like current collector, three-phase traction motor, rotary air compressor and static converter, the traction inverter is controlled by an electronic drive/brake control unit. Beside the control function, the electronic drive/brake control unit provides recording of service data, fault diagnosis and memory. This permits analysing of the vehicle´s drive and control equipment on site with a standard PC or via modem at the manufacturers.

The electronic on-board Information and Control System, transporting the commands from the driver´s panel to the current collector, to the traction inverter and to the static converter, enables a vast exchange of data in the bus. The important characteristics of these microprocessor controlled (intelligent) devices are the structure of the bus with multi master organisation, the data transfer as per CAN protocol as well as the numerous recording and processing of faults.

Most of the electrical components and assemblies including electronic drive/brake control unit and static converter are integrated in the roof. They are mounted and cabled on a metal frame which is extensively tested and ready to be in-stalled in the roof and plugged up. Additional housings or special cases are not necessary. The auxiliary power unit and the compressor are placed in the back of the bus so that the weight is evenly distributed to the axles.

The bus heating consists of several 600 V heating devices being integrated in the roof. The airflow is guided in a manner to prevent steaming up of the windows even with most unfavourable weather.

The electrical equipment is designed as a modular concept so that numerous variations are possible (trolleybus, dual mode bus, hybrid bus).

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