The R 976-E electrical crawler excavator, together with the R 980 SME-E, replaces the ER 974 B for mine and quarry extraction. The most recent electrical excavators to be developed and produced by Liebherr-France SAS in Colmar, France, they don’t seem to be simply transformed diesel machines. The excavators and their electrical energy system had been designed and produced completely by Liebherr. 

Robustly designed and able to withstanding excessive situations, they weigh 90 and 100 tonnes respectively and can be found in backhoe and shovel variations. They function a low noise stage, optimum versatility and 0 CO₂/greenhouse fuel emissions throughout operation. 

Tried and examined electrical system based mostly on greater than 40 years of Liebherr expertise 

The electrical system within the new Liebherr R 976-E 400 kW crawler excavator is provided with 6000 V energy through a cable connection, with the cable inlet within the centre of the undercarriage, or on the edges if requested. A motor cable drum can also be accessible as an choice. The machine is powered by a excessive voltage 6000 V/50 Hz present collector. A swap cupboard transformer (excessive voltage/low voltage) and a low voltage cupboard for energy distribution and management of 690 V, 230 V and 24 V networks are situated on the higher carriage. 

Technological benefits

The know-how used within the R 976-E and R 980 SME-E provides a bunch of benefits. Due to its fixed velocity regardless of the load, an excavator with an electrical engine has an extended service life. Additionally, the excessive availability of transient energy for complicated machine actions permits very excessive productiveness. The R 976-E’s low-voltage electrical squirrel-cage engine drives the hydraulic system. The engine options warmth shielding on bearings and motor windings. Built-in right into a body with a bolstered flange, it permits secure, gentle beginning. The 2 sturdy electrical cupboards are assembled by welding right into a construction particularly designed to resist excessive working situations. The lockable watertight (IP 65) doorways are fitted with security switches and an emergency cease. The excessive voltage cupboard is a devoted contact for energy connection and voltage transformer, whereas the low voltage cupboard is used for energy connection monitoring.

The R 976-E and R 980 SME-E additionally supply customers consolation and security. They function a spacious cab geared up with an automated everlasting air-conditioning and heating system whereas the outside has a 270° digicam system plus an armoured windscreen and roof window.

The operator’s platform options numerous extra monitoring capabilities and an ordinary massive 9″ display screen.