Liebherr EP 944 C User Manual

Stationary Electric Material Handlers

EP 934 C Working Radius: 13 - 20 m
EP 944 C Working Radius: 15 - 22 m
EP 954 C Working Radius: 16 - 24 m

EP 934 C

EP 944 C

Working radius: 13 - 20 m
Motor rating: 160 kW/ 217 hp
Weight: 39,100 kg

EP 954 C

Working radius: 16 - 24 m
Motor rating: 250 kW/ 340 hp
Weight: 64,500 kg

Working radius: 15 - 22 m
Motor rating: 200 kW/ 272 hp
Weight: 51,900 kg

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Performance

These new electric Material Handlers have been designed
to meet the specifi c needs of industrial handling. A wide
range of equipment and uppercarriages optimized for
long working radius provide the ideal answer to all the
demands which arise in the industry.
The performance of the kinematic chain formed from com­ponents from our in-house production, combined with the
power of the electric motor, maximize the performance of
the machine when it comes to lifting power, precision, and
speed of operation.

Reliability

Backed by more than 30 years experience in the con­struction of electric excavators, Liebherr designed the
new EP 934 C, EP 944 C and EP 954 C with the aim of
providing top performance whatever the challenge might
be. The structure of the machine, using components from
our own manufacture for the electric drive, has been com­pletely rethought, and so moves away from simply being
an adaptation of a diesel-engine machine.
Being intended for key functions in the organization of in­dustrial sites, Liebherr electric Material Handlers provide
a very high level of reliability. The service life of the hy­draulic components has also been increased, thanks to
the smoother movement of the electric drive.
The concept of the single actuator (one single electric mo­tor for all the hydraulic functions) allows for the risk area
associated with the low voltage at the electric cabinet to
be reduced even further.

Comfort

Helping the operator to concentrate on his work and get
the best out of his machine is achieved by providing a
comfortable driving position, good visibility, and a highly
ergonomic layout of the controls. The new electric Mate­rial Handlers offer the same level of comfort as on the
mobile excavators (arrangement of the controls, driver’s
seat, climate control, large window areas, etc.). The elec­tric motor system adds a further layer of comfort thanks
to the low noise emissions and absence of vibration.
For Liebherr, comfort also means ease of daily mainte­nance of the machine in terms of access to the service
and inspection points, so as to minimize downtime.

Economy

Investing in the acquisition of an electric Material Han­dler is a great long-term advantage. Constant increases
in the costs of conventional energy sources are pushing
up operating charges, and reducing profi t margins con­siderably. Environmental criteria, in particular CO2 emis­sions, are also playing a constantly greater part in the
choice of power systems and working methods. With the
electric drive, Liebherr offers an economical alternative to
conventional diesel-engine machines, and a solution with
real respect for the environment.

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EP 934 C EP 944 C EP 954 C Material Handlers

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Ideal balance between power,
speed, and precision

• When it comes to handling metals,
timber, or any other application, a
wide choice of equipment in a broad
range of confi gurations means that
the most varied demands can al­ways be met by specifi c solutions

• Optimization of the Material
Handlers goes well beyond just
the choice of equipment. It even
includes the adjustment of the hy­draulics to meet the needs of the
site and of the operator

Performance

These new electric Material Handlers have been designed to meet the specifi c
needs of industrial handling. A wide range of equipment and uppercarriages op­timized for a long operating radius provide the ideal answer to all the demands
which arise in the industry.
The performance of the kinematic chain, formed from components from our own
in-house production, combined with the power of the electric motor, maximize
the performance of the Material handlers when it comes to lifting power, preci­sion, and speed of operation.

Great lifting power

Excellent Working
Radius

Fast work cycles

Thanks to the optimised rear offset and the broach
kinematics of the equipment, the design concept
of the new uppercarriages means they can oper­ate at exceptional outreach whilst guaranteeing a
good balance of forces and better absorption of
mechanical stresses.

Tough and designed for the most demanding of
applications, Liebherr equipment systems are
the perfect answer to every requirement when
it comes to lifting power and range of outreach.
Components are optimised by the fi nite element
calculation method.

The EP 934 C, EP 944 C and EP 954 C electric ex­cavators are fi tted with the Liebherr Torque Control
system. The hydraulic guidance system on the ex­cavator operates as a closed circuit, and does not
affect the speed of movement of the equipment
during the working cycle. The high torque and high
oil delivery from the guide pump maximize the ex­cavator rotation speed.
A two-pump hydraulic system allows for operating
speeds to be reached which are unequalled any­where. Regeneration on the circuits for the equip­ment allows for optimization of the hydraulic power
available and minimizing response time to the op­erator’s commands. This all results in a fl uidity of
movements which operators really appreciate.

Distributor

• Fine response of hydraulic control
for maximum working precision

• Immediate response to operator‘s
commands

• Three-pump hydraulic system, one of
which is a closed circuit dedicated to
the slewing of the Material Handlers

Precision of work

The fi ne response of the hydraulic control allows
for exceptional precision of work to be achieved
at long outreach, which contributes to the comfort
and convenience of the operator as well as achiev­ing high performance results. Power is nothing
without control.

Tough structure

• High strength steel sheet at points sub­ject to severe stress, stands up to the
most extreme demands

• Stable mounting of equipment elements

• Exceptional strength, even under intense
loading

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Reliability - Safety

• Automatic Power cut off if the
cabinet doors are opened

• Automatic power cut off in
the event of any anomalies
(electric motor or its bearings
overheating)

• Active safety on the trans­formers in the electric cabinet

Reliability

Backed by more than 30 years experience in the construction of electrically pow­ered excavators, Liebherr designed the new EP 934 C, EP 944 C and EP 954 C
with the aim of providing top performance whatever the challenge might be. The
structure of the excavator, using components from our own manufacture for the
electric drive, has been completely rethought, and so moves away from simply
being an adaptation of the diesel-engine excavator.
Being intended for key functions in the organization of industrial sites, Liebherr
electric Material Handlers provide a very high level of reliability. The service life
of the hydraulic components has also been increased thanks to the smoother
movement of the electric drive.
The concept of the single actuator (one single electric motor for all the hydraulic
functions) allows for the risk area associated with the low voltage at the electric
cabinet to be reduced even further.

Electrical
system

Protected electric
cabinet

Electric motor

Totally integrated into the structure of the uppercarriages
and accommodated in a metal container, the electric cabi­net provides a three-fold level of protection to the compo­nents of the electrical system:

- Mechanical (insulation from vibrations and from the pos­sible impact of falling objects)

- Heat (maintains a constant temperature thanks to the
heating resistors which prevent corrosion from conden­sation)

- Electrical earthing of the structure and disconnection
from current is controlled from the cab by way of a mo­torised circuit-breaker.

The electric cabinet, like the rotating joint, provides IP55
class protection. A double fi ltration system (accessible
from the outside) places the cabinet under pressure,
which avoids any dust penetration and, with permanent
ventilation, ensures the thermal balance of all the com­ponents.

Liebherr electric excavators are equipped with motors
especially designed for really tough applications. The di­mensions of the motor allow for the full power to be drawn
from the kinematic chain, and so maximises the perform­ance of the machine. The motor can resist a momentary
overload of up to +25 % of its rated capacities.
Protected against penetration by water and dust, its prop­erties correspond to protection class IP55.
The temperature of the roller bearings and other bearing
elements is constantly monitored, and, in the event of
overheating, the operator is warned of malfunction on the
console at the driving position.

Cooling system

• Generous dimensions for high
cooling capacity

• Vertical arrangement for in­creased effi ciency and minimal
incursion of foreign bodies

• Powered by a thermostatically
regulated hydraulic motor

• Hinged to allow for complete
cleaning

• Reversible actuation of the fan
(without time limit) as option

Elastic base

• Complete range of elastic bases especially
designed for each model

• Absorption of mechanical stresses (normally
transferred to the chassis of an excavator) if
mounted on a rigid structure (anchored metal
body, concrete body)

• Protection for the machine (in particular the
elements of the rotation assembly), as well as
for the load-bearing structure, against the axial
and radial forces generated by the operating
dynamics

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Cab with control panel

• The command arrangement for
putting the electrical system under
voltage is progressive (3 functions)
and the emergency stop button al­lows for the general cutting of the
electric cabinet supply

• Available as an option is a cut off
system deriving from one source
point, which can be activated from
the driving position via an addi­tional rotating joint

Comfort

Helping the operator to concentrate on his work and get the best out of his ma­chine is achieved by a driving position which provides comfort, good visibility,
and a highly ergonomic layout of the controls. The new electric Material handlers
offer the same level of comfort as on the mobile excavators (arrangement of the
controls, driver’s seat, climate control, large window areas, etc.). The electric
motor system adds a further layer of comfort thanks to the low noise emissions
and absence of vibration.
For Liebherr, comfort also means ease of daily maintenance of the machine in terms
of access to the service and inspection points, so as to minimize downtime.

Driving position

Wide walkway with
safety rail

Low noise emissions

Carbon gas emission

Mounted as standard on a fi xed platform of 1 200 mm
(2 000 mm or hydraulic platform on request), the
new cab on the electric excavators meets all safety
standards in force (24 V supply in the operator's
compartment), comfort, panoramic visibility, and
ergonomic arrangement of the controls for perfect
control of the machine.

Arranged on the upperdeck, combines safety and
convenience for accessing all the maintenance
points on the machine. Access to the lower structure
(metallic base, concrete pedestal, chassis) can be
tailor-made depending on the type of installation.

Liebherr electric excavators are really quiet in opera­tion. Their measured acoustic level is from 4 to 5 dB
lower than an equivalent diesel-engine version.
The level of noise intensity from a Liebherr electric
excavator represents less than a third of the noise
generated by a diesel-engine unit.

Zero grams of CO2 emitted per tonne of product
handled!

Climate control entirely automatic

• Automatic climate control ensures a
level of comfort similar to a private car

• Two sensors for precise temperature
regulation

• Ventilation fl aps can be adjusted
at the touch of a button

• Rapid demisting and defrosting
of the windscreen thanks to the
«reheat“ function

Easy maintenanc

• Optimum placement of components
on the uppercarriage

• Wide service walkway

• Easy access to service points thanks to
grouping together of inspection points

• Downtimes reduced to the minimum

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Wide range of solutions

• Modular arrangement for
rapid changeover

• Liebherr quick-coupling system,
mechanical and hydraulic, for effi cient
equipment changeover

• Quick-coupling arrangement for
hydraulic lines (Multi-Coupler)

• Complete range of grapples

• Range of different wood grapples
and grab buckets from Liebherr