The LR 1160.1 Unplugged is the latest model in the Liebherr’s battery-powered
crane series. The company says it is one of the first battery-operated crawler cranes in the world.
The crane has a load capacity of 160 t and the electro-hydraulic drive has the same performance specifications as Liebherr’s conventional version. Both versions are operated in the same way, too.
As you would expect from an electric, emissions-machines, machine it is very quiet: Liebherr says that, in idling mode, the sound pressure level of three Unplugged cranes, at a distance of 16 m, is equivalent to that of a normal conversation on the job site at a distance of 1 m. This corresponds to a value of only 60 dB(A). If it is taken into account that a crawler crane is in idling mode for 60 % of the time on the jobsite, this low noise level is an big advantage said Liebherr.
The LR 1160.1 Unplugged can be operated with or without cable. The battery offers eight hours lifting operation. The crane can be operated without restrictions while plugged into a conventional electric supply with 63 A or charged within 4.5 hours. Using a 125 A supply, the battery can be fast-charged in 2.5 hours.
The LR 1160.1 Unplugged is equipped with all Liebherr’s established assistant systems designed for safe operation. In addition, it includes a Gradient Travel Aid for the safe negotiation of slopes and inclines. It uses the crane’s control system to automatically calculate the centre of gravity and warn the operator before the crane leaves the safe area. While travelling, the operator receives information about the permissible and actual gradient and the crane's overall centre of gravity at all times. If necessary, the boom angle can be altered so that the machine remains in the safe area.
A Ground Pressure Visualization function calculates the actual ground pressure of the machine in real time and compares it with the specified safety limits of the relevant job site. This means the operator is permanently aware of whether the machine is situated in, or is approaching, a critical area, outlined Liebherr.
When erecting or lowering the boom, a Boom Up-and-Down Assistant indicates the approach to the tipping border and automatically stops operation before the operator unintentionally enters an unsafe zone.
Liebherr-Werk Nenzing has delivered the first three LR 1160.1 unplugged cranes to Select Plant Hire in the United Kingdom. Select is pursuing the goal of operating more and more zero-emission construction sites and plans to buy another three further LR 1160.1 Unplugged cranes this year.
The Unplugged version of the crane can be recognised via the blue accent on the crane’s uppercarriage.
https://www.liebherr.com/en/deu/products/mobile-and-crawler-cranes/crawler-cranes/lr-crawler-cranes/technologies/crane-control-and-assistance-systems.html
