CITY CRANES Ӏ SECTOR REPORT
fossil-derived diesel, as part
of our zero-carbon status. It is on-site that the electric motor comes into its own.” Most city job sites have access to grid electricity… but some do not. Even at those that do the grid power available may be insufficient for peak crane demand – such as lifting a large load at speed, for example. The cables snaking across the ground to your city crane may also well be a safety hazard. Liebherr and Ainscough have thought of that. The LTC 1350 3.1E can be battery-powered, after all; it’s just that the battery is not on board. A large, free-standing battery pack – Liebherr calls it the Liduro – can be delivered to the site, set down next to the crane operating area, and
54 CRANES TODAY
A Kato 13t takes up not much more space than a car
plugged into it; only a short length of cable, right next to the crane, is needed. “The battery weighs 1.3 tonnes,” says Tony Gribble, general manager aftersales of LWE mobile and crawler cranes at Liebherr GB. “In Europe the crane itself can tow the battery to the site. UK regulations, however, don’t allow that so another truck delivers it. It can supply power at 32 kW, 64 kW, or 128 kW. At 128kW the crane speed is almost the same as when it is operating from the engine – which is impressive. When it is at 32 kW the crane’s movements are noticeably slower although the battery will last a longer time. The battery can be trickle- charged at the site, drawing a small but constant current from
the grid without overloading it, which can sometimes be a good solution.”
SMALL BUT SWEET Kato has been a pioneer of the city crane and last year it brought out a new model: the 13-tonne CR-130Rv. The crane is now available in Europe through Kato’s European distributor Rivertek Services. Ivan Bolster is Rivertek’s operations manager. “The CR-130RV has proven hugely popular throughout a range of industries in Europe,” he says. “It is one of the smallest mobile cranes available on the European market, and crane rental companies can earn very decent revenues with it, so it is very popular with rental companies in particular.
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