These new electric Material Handlers have been designed
to meet the specific needs of industrial handling. A range
of equipment even wider for the High Rise 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. The equipment’s performance is
enhanced by the mobility provided by the crawler undercarriage as well as the height of work adapted to the industrial process.
Reliability
Backed by more than 30 years experience in the construction of electric excavators, Liebherr designed the
new ER 934 C, ER 944 C and ER 954 C High Rise with the
aim of providing top performance whatever the challenge
might be. The structure of the machine, using compo-
nents 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 com-
ponents has also been increased, thanks to the
constant regime of the electric drive. The concept of the
single actuator (one single electric motor for all the hydraulic functions) allows all the low-voltage functions to
be concentrated in a single box.
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 panoramic visibility, and a
highly ergonomic layout of the controls. The new electric
Material Handlers offer the same level of comfort as on the
thermal 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 down time.
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. Also, the excavator
is permanently available, with no need to refill. There are
no constraints (e.g. DPF or AdBlue). Mobility is added to
economy, through custom cable reels solutions.
ER 934 C - ER 944 C - ER 954 C High Rise
3
Excavator electric at a glance
Cab with special
control panel
• Control power on/off
of the excavator
• Additional interface for
the cable reel option
Integrated electric cabinet
• Hard conditions
• Pressure relief system
to prevent the intrusion
of dust
• Closing with padlocks
• Robust
Wide range of tools,
including
• Grapples
• Shells for Loose Material
• Wood clamps
• Quick change adapter
Wide range of equipments
• Range of equipments from
the stationary excavators
for a moving machine
• Special adjustments on
demand
Kinematic chain Liebherr
• High work precision
• Immediate response
• Large power for
maximum productivity
Electric motor
• Hard conditions
• Constant regime
whatever the load
• Integrated sensors for
maximum availability
ER 934 C - ER 944 C - ER 954 C High Rise
4
Cab elevation
• Wide range of rigid cab elevation
and adjustable hydraulically
• High visibility of the working
area and the site
Access
• As standard, safety and comfort
to access the work space
• Handrails, non-slip surfaces
Walkways
• Wide walkways and handrails
all around the excavator
• Can be tted with secure
trapdoors, wicket doors
Undercarriage
• Derived from thermal excavators,
specifically equipped for electric
excavators :
- cable entry
- power connector
- slip ring collector
• Stability for all operations
Cable entry
• In free-standing, cable left
entry as standard, right or rear
on demand
• Rear cable reel for a large radius
of action and movement facilities
• Side cable reel for in-line
processes
ER 934 C - ER 944 C - ER 954 C High Rise
5
VarioLiftPlus
Variable Boom Mounting Positions for Optimized Lift Capacities
Hole A
Hole B
Hole 3
Hole 2
Version 2A
R0082
2A
with the same working range with a different working range
2A
3B
3B
R0082
3A
Kinematic variant 2A:
Increased lift capacities above ground level
Kinematic variant 3B:
Kinematic variant 3A:
Altered range curve with additional reach
depth, e.g. for unloading from ships
Increased lift capacities below ground level
and when working at large outreach
R0110
with a different working range
R0082
Hole C
Hole D
Hole 3
Hole 2
Version 3D
3D
3D
Kinematic variant 3D:
Increased lift capacities below ground level
and when working at large outreach
R0110
R0110
3C
Kinematic variant 3C:
Altered range curve with additional reach
depth, e.g. for unloading from ships
6 ER 934 C ER 944 C ER 954 C High Rise
Technical Data
Electric Motor
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Engine
934 944 954
Power rating
(as per CEI 34-1)
Rated voltage
Number of poles
Design type
Standard degree of protection
Insulation
Cooling
Heat protection for windings
Heat protection for bearings
Anti-condensation heating system resistors
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induction motor dedicated definition Liebherr
160
kW (218 HP)
400 V – 50 Hz *
4
horizontal axle B35
axle height 315 mm
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IP55
class F
IC06
200
kW (272 HP)
250
kW (340 HP)
Electric System
The 400 V electrical cabinet provides a degree of protection to IP55.
This houses the following components:
– Electrical cabinet – remote control inside the cab
– Star/delta starter for motor
– Outlets for supplying auxiliary elements: heating, climate control
– Overheat protection devices
– Integrated heating and ventilation
– Filtered booster
– Transformers – rectifier for 24 V control circuit
– Motor protection
– Auxiliary batteries: 2 x 135 Ah/12 V: secured functions: lighting for excavator/
attachment position (option)
– Connecting inside closed panel
– Equipment: slip ring collector
door with sliding window
shock absorbing suspension, adjustable to
operator’s weight, 6-way adjustable seat
integrated into adjustable seat consoles
menu driven digital display of current operating
conditions. Automatic monitoring, display, warn-
ing (audible and visual signal) and saving of
machine malfunction data, such as overheating
ofwindings, motor bearings, or low hydraulic
oillevel
standard climate control system, combined
cooler/heater, additional dust filter in the outside/
fresh air circuit
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101 dB(A) 103 dB(A) 105 dB(A)
ER 954 C ER 944 C ER 934 C
Hydraulic System
934 944 954
Hydraulic pump
for the attachment
Max. flow
Max. pressure
Pumpenansteuerung
Hydraulic pump
for the swing drive
Max. flow
Max. pressure
Hydraulic tank
Hydraulic system
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Filtration
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Cooling
Tool Control
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two Liebherr swash plate pumps with variable
output
2 x 253 l/min. 2 x 305 l/min. 2 x 341 l/min.
350 bar
electro-hydraulic, with electronic regulation by
power limit, minimum pump flow at max. pres-
sure, distribution of oil to different receptor
components proportional to demand
reversible swash plate pump, in closed circuit
170 l/min. 205 l/min. 205 l/min.
370 bar
340 l 460 l 440 l
550 l 710 l 790 l
934: filter in the return circuit, with integrated fine
filter elements (5 μm)
944/954: 2 filters in the return circuit, with inte-
grated fine filter elements (5 μm)
radiator equipped with hydrostatic drive fan for
cooling the hydraulic oil and climate control
condenser
10 flow rates and pressures adjustable as option
for optional accessories
Hydraulic Controls
Power distribution
Flow summation
Closed-loop circuit
Control
Attachment and swing
Travel
Additional functions
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with the aid of hydraulic distributors with
integrated safety valves
to boom stick and stick
for uppercarriage swing drive mechanism
proportional by handling element in cross
operation
proportional by pedals or by lever
proportional by pedals or by toggle switch
high-strength steel for extreme stresses. Bearings
designed for optimum distribution of stresses
Liebherr cylinders with end-of-travel shock
absorbing, fitted with guide and sealing joints
sealed, low maintenance
centralised semi-automatic Liebherr lubrication
system
variable boom mounting positions for optimized
lift capacities
* Other voltages and frequencies possible on request.
ER 934 C ER 944 C ER 954 C High Rise 7
The Right Attachment
for Every Application
ER 934 C
Industrial-type straight mono boom 7.60 m
Sorting grapple
Stick 5.00 m
Industrial-type straight mono boom 8.60 m
Uppercarriage Elevation
Undercarriage
Wood grapple
Multi-tine grapple
Industrial-type straight mono boom 9.60 m*
Cylindrical cable reel
Industrial stick 6.00 m
Industrial-type straight mono boom 10.60 m*
Spiral cable reel
Industrial stick 7.50 m
Rigid cab elevation
Industrial stick 8.00 m
Industrial-type angled mono boom 7.60 m
Hydraulic Cab Elevation
Industrial stick 9.00 m*
Clamshell bucket
* presented configurations
8 ER 934 C ER 944 C ER 954 C High Rise
Industrial stick 9.00 m*
Industrial-type angled mono boom 8.60 m
Industrial-type angled mono boom 9.60 m*
Hydraulic Cab Elevation
+ Rigid cab elevation
Hydraulic Cab Elevation
+ Intermediate Piece
Dimensions
WW
LL
UU
ZZ
VV
XX
mm
A 3,225
A1 5,935
C 5,800
D 3,930
E 4,030
F 3,770
H 5,780
K 3,395
L 5,350
P 1,215
Q 530
S 4,200
U 6,320
N 750
B 4,950
G 5,060
Z 7,095
E = Tail radius
EE
DD
HH
KK
NN
A1A1
AA
QQ
SS
BB
GG
Industrial-Type Straight Mono Boom 9.60 m
and Industrial Stick m 9.00 10.00
V mm 5,800 5,450
W mm 4,850 5,550
X mm 14,100 14,100
Industrial-Type Straight Mono Boom 10.60 m
and Industrial Stick m 9.00 10.00
V mm 6,950 6,000
W mm 4,900 4,900
X mm 15,100 15,100
Industrial-Type Angled Mono Boom 9.60 m
and Industrial Stick m 9.00 10.00
V mm 5,700 5,500
W mm 5,450 6,500
X mm 14,100 14,100
ER 934 C
CC
PP
R0083
EEFF
DD
WW
LL
UU
ZZ
VV
XX
HH
KK
NN
A1A1
AA
CC
QQ
SS
BB
GG
PP
R0084
ER 934 C ER 944 C ER 954 C High Rise 9
Industrial Attachment
with Industrial-Type Straight Mono Boom 9.60 m
m
ft
24
75
22
70
ER 934 C
20
65
60
18
55
16
50
14
45
40
12
35
10
30
8
25
20
6
15
4
10
2
5
0
0
-5
-2
-10
-15
-20
-25
-30
-4
-6
-8
16
18
20
1
3
2
4
6
8
10
12
14
R0100
Attachment Envelope
Kinematic variants 2A
1 with industrial stick 9.00 m
2 with industrial stick 9.00 m and grapple model GM 70C
3 with industrial stick 10.00 m
4 with industrial stick 10.00 m and grapple model GM 70C
Operating Weight
and Ground Pressure
Operating weight includes basic machine with hydraulic cab elevation
+ intermediate piece 0.5 m, counterweight 7.5 t, industrial-type
straight mono boom 9.60 m, industrial stick 9.00 m and grapple model
GM 70C with 5 semi-closed tines 0.80 m
Undercarriage HR
Pad width mm 750
Weight kg 56,200
Ground pressure kg/cm
0
2
4
3
(1,705 kg).
2
0.70
75
70
65
60
55
50
45
40
35
30
25
20
15
10
-10
-15
-20
-25
-30
ft
5
0
-5
70 65 60
m
24
22
20
18
16
14
12
10
8
6
4
2
0
-2
-4
-6
-8
20
18
55 50
16
0mft
5
15 10
25 20
30
35
40
54
R0101
Attachment Envelope
Kinematic variants 3B
1 with industrial stick 9.00 m
2 with industrial stick 9.00 m and grapple model GM 70C
3 with industrial stick 10.00 m
4 with industrial stick 10.00 m and grapple model GM 70C
Operating Weight
and Ground Pressure
Operating weight includes basic machine with hydraulic cab elevation
+ intermediate piece 0.5 m, counterweight 7.5 t, industrial-type
straight mono boom 9.60 m, industrial stick 10.00 m and grapple
model GM 70C with 5 semi-closed tines 0.80 m
Undercarriage HR
Pad width mm 750
Weight kg 56,400
Ground pressure kg/cm
1
3
2
4
0
2
4
6
8
10
12
14
3
(1,705 kg).
2
0.70
70 65 60
55 50
35
40
54
10 ER 934 C ER 944 C ER 954 C High Rise
30
25 20
15 10
0mft
5
Lift Capacities
with Industrial-Type Straight Mono Boom 9.60 m
Industrial Stick 9.00 m (Variant 2A)
3.0 m 4.5 m 6.0 m 7.5 m 9.0 m 10.5 m 12.0 m 13.5 m 15.0 m 16.5 m 18.0 m 19.5 m
Under m carriage m
3.0 m 4.5 m 6.0 m 7.5 m 9.0 m 10.5 m 12.0 m 13.5 m 15.0 m 16.5 m 18.0 m 19.5 m
Under m carriage m
24.0
HR
22.5
HR
21.0
HR
19.5
HR
18.0
HR
16.5
HR
15.0
HR
13.5
HR
12.0
HR
10.5
HR
9.0
HR
7.5
HR
6.0
HR
4.5
HR
3.0
HR
1.5
HR
0
HR
– 1.5
HR
– 3.0
HR
– 4.5
HR
Height Can be slewed through 360° In longitudinal position of undercarriage Max. reach * Limited by hydr. capacity
The lift capacities are stated in metric tonnes (t) on the lifting gear’s stick tip, and can be lifted 360° on firm, level supporting surface. Capacities
are valid for 750 mm track flat pads. Indicated loads are based on ISO 10567 standard and do not exceed 75 % of tipping or 87 % of hydraulic
capacity (indicated via *). Lifting capacity of the excavator is limited by machine stability, hydraulic capacity and maximum permissible load of the
load hook.
According to European Standard, EN 474-5: In the European Union excavators have to be equipped with an overload warning device, a load
diagram and automatic safety check valves on hoist cylinders and stick cylinder(s), when they are used for lifting operations which require the use
of lifting accessories.
3.0 m 4.5 m 6.0 m 7.5 m 9.0 m 10.5 m 12.0 m 13.5 m 15.0 m 16.5 m 18.0 m 19.5 m
Under m carriage m
24.0
HR
22.5
HR
21.0
HR
19.5
HR
18.0
HR
16.5
HR
15.0
HR
13.5
HR
12.0
HR
10.5
HR
9.0
HR
7.5
HR
6.0
HR
4.5
HR
3.0
HR
1.5
HR
0
HR
– 1.5
HR
– 3.0
HR
– 4.5
HR
Height Can be slewed through 360° In longitudinal position of undercarriage Max. reach * Limited by hydr. capacity
The lift capacities are stated in metric tonnes (t) on the lifting gear’s stick tip, and can be lifted 360° on firm, level supporting surface. Capacities
are valid for 750 mm track flat pads. Indicated loads are based on ISO 10567 standard and do not exceed 75 % of tipping or 87 % of hydraulic
capacity (indicated via *). Lifting capacity of the excavator is limited by machine stability, hydraulic capacity and maximum permissible load of the
load hook.
According to European Standard, EN 474-5: In the European Union excavators have to be equipped with an overload warning device, a load
diagram and automatic safety check valves on hoist cylinders and stick cylinder(s), when they are used for lifting operations which require the use
of lifting accessories.