The new electric models from Liebherr will be displayed at bauma, including the LRH 100.1 unplugged and LRH 200 unplugged piling rigs, LB 25 unplugged and LB 30 unplugged drilling rigs, and LR 1130.1 unplugged and LR 1160.1 unplugged crawler cranes.
A highlight of these battery-powered unplugged units is zero emission. They do not produce any exhaust fumes and are extremely quiet, making them suitable for noise-sensitive areas.
The battery is charged using a conventional jobsite electric supply, and operation can continue as normal while charging. In order to change to battery operation, users just need to pull out the plug (hence, unplugged).
According to Liebherr, whether attached to the electric supply or not, the performance and range of application remains unchanged. All six models are available in both conventional and battery-operated versions and feature identical performance specifications.
LRH 100.1 unplugged and LRH 200 unplugged
The LRH 200 unplugged has been newly developed and closes the gap between the LRH 100 and LRH 600 in the series of piling rigs.
A 200-kWh battery pack ensures that the unplugged models can operate in battery mode for 4 to 5 hours in average pile driving applications. Optionally, it can be upgraded to 400 kWh for 8 to 10 hours of operation.
The new design of the LRH 200 extends the range of applications and makes it even more versatile. In addition to piling, the machine can be used for continuous flight auger, full displacement and down-the-hole drilling, as well as for soil mixing work. A torque of 250 kNm provides the necessary power.
When equipped with the Liebherr H 6 hydraulic hammer, the LRH 200 and the LRH 200 unplugged can lift piles up to 24.5 m long and weighing 16 t. The machine especially excels with its large working range. A radius of up to 8.7 m has the advantage that the machine does not have to be constantly moved.
The design of the leader enables inclinations of up to 18° in all directions. Furthermore, it is also possible to raise or lower the leader by 6.5 m (for example, when working in a foundation pit), which makes the machine even more flexible.
The Ground Pressure Visualization of the new LRH model calculates the current ground pressure in real time and compares it with the specified safety limits of the respective construction site. The ground pressure is displayed in the operator’s cabin. This means the operator is permanently aware of whether the machine is situated in, or is approaching, a critical area.
The operation of the new LRH 200 piling rig is based on the proven concept of the LRH 100 and is therefore user-friendly. The integrated data recording makes the analysis of the pile data very easy and saves a significant amount of time.
LB 25 unplugged and LB 30 unplugged
The new LB 25 unplugged and LB 30 unplugged are identical to their conventional version in terms of application possibilities, weight or transport; however they have the additional advantage of zero emission. These drilling rigs can be used for all common applications in the field of deep foundation.
Thanks to the optional extension of the drilling axis, the machines can be deployed for drilling diameters of up to 3.4 m. The optional rear support and the new design of the modular rear counterweight ensure higher stability and longer service life.
Besides their standard design, both models are available in a low head version with a total height of 14.1 m, or as ultra-low head with only 7.7 m.
For battery operation, the charging cable only needs to be unplugged and, for unlimited operation, reconnected to the construction site power supply. The battery is designed for a working time of 4 hours in Kelly operation. Whether in battery or plugged-in operation, the drilling performance remains unchanged.
LR 1130.1 unplugged and LR 1160.1 unplugged
The new LR 1130.1 unplugged and LR 1160.1 unplugged extend the range of crawler cranes from Liebherr’s Nenzing, Austria facility.
The electro-hydraulic drive of these new cranes has the same performance specifications as the conventional version. Both versions are operated in the same way, which is highly practical if the crane driver often has to change between machines in one fleet.
The capacity of the battery is designed for an average lifting operation of 8 hours. Alternatively, the main boom with luffing jib can be completely erected. The battery can be recharged within only 2.5 to 4.5 hours. As an option, the performance can be increased by 20 to 60% using additional batteries.
In idling mode, the sound pressure level of three unplugged cranes is equivalent to that of a normal conversation on the jobsite. 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 advantage with great resonance.
The latest system is the Gradient Travel Aid for safe negotiation of slopes and inclines. The crane’s control system automatically calculates the centre of gravity and warns 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.
Bauma booth: FM.809-810 / 812-813, A4.326, B5.439 and C1.425