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Two new local zero emission excavators from Liebherr


April 12, 2021
By Rock to Road

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Liebherr excavator 976The Liebherr R 976-E electric crawler excavator replaces the ER 974 B for mine and quarry extraction. Photo: Liebherr

Liebherr launched two new excavators; the R 976-E electric crawler excavator, along with the R 980 SME-E. Both replace the ER 974.

Designed to withstand extreme conditions, they weigh 90 and 100 tonnes respectively and are available in backhoe and shovel versions. They stand out for their low noise level, optimum versatility and zero CO2/greenhouse gas emissions during operation.

Liebherr excavators

The electric system in the new Liebherr R 976-E 400 kW crawler excavator is supplied with 6000 V power via a cable connection, with the cable inlet in the centre of the undercarriage, or on the sides, if requested. A motor cable drum is also available as an option. The machine is powered by a high voltage 6000 V/50 Hz current collector. A switch cabinet transformer (high voltage/low voltage) and a low voltage cabinet for power distribution and control of 690 V, 230 V and 24 V networks are located on the upper carriage.

Technological advantages

The high availability of transient power for complex machine movements enables very high productivity. The R 976-E’s low-voltage electric squirrel-cage engine drives the hydraulic system. The engine features heat shielding on bearings and motor windings. Integrated into a frame with a reinforced flange, it enables safe, soft starting. The two robust electrical cabinets are assembled by welding into a structure specifically designed to withstand extreme working conditions. The lockable watertight (IP 65) doors are fitted with safety switches and an emergency stop. The high voltage cabinet is a dedicated contact for power connection and voltage transformer, while the low voltage cabinet is used for power connection monitoring.

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Liebherr crawler excavator 976

The Liebherr R 976-E electric crawler excavator stands out for its robustness, reliability and cost-effectiveness. Photo: Liebherr

Robustness, reliability and cost-effectiveness

Liebherr excavators have been tested in extreme conditions. In line with its commitment to ecology and sustainability, Liebherr guarantees zero pollutant gas emissions. In addition, to ensure quality, the electric power system was designed and produced entirely by Liebherr-France SAS itself.

Reduced maintenance and lower operating costs make an electric excavator more cost-effective than a diesel-engine machine. For greater comfort, the R 976-E and R 980 SME-E are extremely quiet. The robustness, reliability and cost-effectiveness of the R 976-E and R 980 SME-E make them products of choice for environmentally friendly extraction applications.

A working environment up to the highest standards

The R 976-E and R 980 SME-E offer users comfort and safety. They feature a spacious cab equipped with an automatic permanent air-conditioning and heating system while the exterior has a 270-degree camera system plus an armoured windscreen and roof window. The operator’s platform features a large number of additional monitoring functions and a standard large nine-inch screen.