System Of Horizontal Travel Lifting

General presentation

Coming from applications of lifting
industry, this system associates the horizontal travel and lifting
functions in order to transfer of a modular load, whose values are
understood between 50 to 125 daN.

Intended to be a part of the systems used in electrotechnics lab, this
system has been designed to make wire by students different types of
asynchronous motor starting as well as a logic control.

It is built around an electrical hoist with a capacity of 125 kg
associated with an electrical cabinet integrated to the whole. It
answers the securities norms in force.

Teaching objectives

• Mono speed asynchronous motor starting.


• Bi-speed asynchronous motor starting.


• Variation of frequency of the asynchronous motor.


• Logic control of the brake in lifting mode, safety management.


• Control of measurable sizes of the
  installation: absence or presence of voltage (system able to be used for
  the electric security clearance).


• Commissioning and inspection of the good running after wiring realization.


• Maintenance and control of the system (thermal relay, control of the travels ends).

Technical specifications

Structure:

• Mechanically welded Frame.


• Working area protected by a wire fencing.


• Access to the load by a door (with closing electric contact and key locking) located on the frame.

Lifting mechanism:

Bi-speed electric hoist with chain with nominal capacity of 125 kg, mounted with electromagnetic brake for lack of energy.

• Lifting motor: 850W, 400V three-phase, bi-speed.


• Horizontal travel motor: 400V three-phase, bi-speed.


• Lifting linear speed : 2 and 8 m/mn.


• Horizontal linear speed : 5 and 20 m/mn.


• 4 travel ends mechanics.

Horizontal axis: left and right

• Vertical axis: high and low.


• Load: 8 kg modular metallic masses with 11 additional elements of 10 kg, easily removable.

Control part:

• The electrical cabinet is full part of the system. It receives the bearing plate wired by the student.


• It consists of two distinct zones:

Cableman Area:

• Area receiving receives the bearing plate wired by the student.


• A fastener device and connectors allows a quick assembly of the bearing plate wired by the student.


• The buttons and indicators are fixed on the door and are connected to the bearing plate by a fast connector.

Power supply Area:

This second area concerns the power
supply of the electrical cabinet. It is already wired and the student
doesn’t have an access to it.

It includes:

• An alternative 24V power supply.


• A 3*400V+N+T power supply protected by a 30 mA differential circuit-breaker.


• One security logical building block.


• One security limit switch on the door
  that conditions the power sequencing of the bearing plate. This security
  can be inhibited permitting to make measurement exercises or electric
  authorization.


• The power sequencing buttons and lights.


• A main switch.


• An electric power supply by three phased normalized connector 3*400V+N+T 16A.

We propose, in option, several kits of components allowing the student to realize the wiring of this bearing plate ,:

• Lot of material to wire version direct starting on the 2 axes.


• Lot of material to wire version speed driver.

All these components are available in cabled version on removable bearing plate

General features of the system:

• Measurements: length: 2440 mm, width of the basis: 620 mm, height 1630 mm.


• Weight: 300 Kg.


• Electric power supplied : 3 x 400 V+T+N – 16 A.

Feature of the confinement casket:

• Dimensions (L x w x h) out all: 320 x 650 x 1000 mm.


• Dimensions of the wiring zone: width: 600 mm, height: 800 mm