Keestrack: an electrifying choice in Norway

Constructor Keestrack relied on its Norwegian distributor Fredheim Maskin to showcase its new hybrid (diesel-electric) products, including the new B4e jaw crusher and the H4e mobile cone crusher.

The traditional "Fredheim Demo Days", held in Spydeberg, 30 km south-east of Oslo, served as a platform for the presentation of these new hybrid products. No fewer than 20 machines were exposed in a quarry of granite including the Keelrack B4e with jaws with the stacker S5e, the Keestrack H4e cone and the screen K3e. The combination of these three machines allowed a maximum output of 180 t / h. Without activating their diesel engines, they were powered by a single 500 kVA external generator. Consumption over several days was estimated to be less than 60 liters per hour.

At Keestrack, new "full hybrid" products integrate modern load sensing systems into diesel hydraulic motors and partial electrification of grinders and screeners using electric motors on conveyors and separators. With smaller hydraulic systems, hybrid systems facilitate maintenance and safety, especially in ecologically sensitive areas. While screens and conveyors are electrically powered, hydraulic diesel provides power only for cylinders and caterpillars.

In Norway, Keestrack focused on the complete H4e hybrid model, which incorporates a motor and a hydraulic pump to power the hydraulic circuit without starting the diesel engine. The B4 / B4e is available as an option with diesel engines or full hybrid version. It is designed for recycling applications with capacities up to 300 t / h. The hybrid V4 of the B4e is equipped with a 242 kW diesel engine and a 225 kVA on-board generator.