Electrical Equipment; Functional Description - EMG ELDRO Ed 12/4 Assembly Manual

4.2

Electrical equipment

4.3

Functional description

ELDRO-Assembly-manual-344029-EN.docx
A three-phase asynchronous motor is used as the drive (some
special version also use direct current motors). The power supply is
provided via screw terminals that are located in a junction box. There
is an M25 x 1.5 cable infeed for cable diameters of 10 mm to 19 mm
on the junction box.
The hydraulic pump driven by the motor conveys the hydraulic
medium into the space below the piston. This generates hydraulic
pressure that acts outwards via the piston and lifting rod.
The piston and lifting rod move backwards after the motor is switched
off either due to a force acting from the outside (brake weight, brake
spring) or due to the integrated reset spring. The lifting force that is
available to the user of the ELDRO
difference between the generated hydraulic force and any external or
internal counterforce.
The lifting and lowering times depend on both the load and the
viscosity of the hydraulic medium, which is in turn affected by the
ambient and operating temperatures. In the versions with lifting,
lowering or lifting and lowering valves, the setting/resetting speed of
the lifting rod and therefore the lifting and lowering times can be
adjusted infinitely within a specific range.
If the piston is in the limit position (e.g. in continuous mode S1), the
motor's power consumption reduces due to hydraulic laws. This
prevents the ELDRO
switch is therefore not required.
Functional description
Electrical equipment
® thruster is therefore always the
® thruster overloading and a thermal protective
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