MOZELT T4002 Technical Manual Download Page 8

4. 

Start-up

4.1 

Safety information

Read  the  operating  instructions  before 

start-up of the magnet device!

A visual check is to be made before start-

up of the complete system!

Ensure  that  the  generator  is  tightened 

firmly before start-up!

Check  the  correct  fit  of  the  drive  belts 

before start-up!

Only  attach  load  lifting  magnets  to  the 

system!  Operation  for  other  electrical 

users is not permitted!

Before  beginning  work  on  the  entire 

system disengage the drive motor!

Never  open  the  terminal  connection  box 

and the 220 V connector on the generator 

and  the  magnet  while  the  motor  is 

running!

Fig. 8 | Load lifting magnets with various attachments

www.mozelt.com

4.2 

Safety regulations magnet operation

The  operation  of  a  load  lifting  magnet  on  a  mobile 

excavator  represents  a  special  mode  of  operation  and 

an increased safety risk. In contrast to working with a 

hydraulic grabber, the magnet picks up all available 

ferromagnetic material immediately after it is switched 

on. 

This may even be more than the load-carrying capacity 

of the mobile excavator allows.

Similarly,  the  magnet  suddenly  releases  the  lifted 

material after it is switched off, if there is cable damage 

or a short-circuit in the magnet feed cable. This can 

lead to dangerous situations in the working vicinity, for 

example, if falling material causes other objects to be 

hurled up by lever force. Furthermore, it is not excluded 

that pieces of scrap iron may separate from the magnet 

during a swiveling procedure, if these are located at 

the  lower  end  of  the  lifted  material  cluster.  For  these 

reasons,  it  is  particularly  important  to  observe  the 

following principle:

  

 

 

While working with the load 

 

 

lifting magnet it is forbidden to 

 

 

stand within the extended reach of 

 

 

the excavator

  

 

 

Do not swivel the working equipment 

 

 

or change the location of the 

 

 

excavator with the magnets 

 

 

switched on without a 

 

 

payload - unintentionally 

 

 

lifted materials can lead to 

 

 

human injury by lever force!

The magnet can oscillate strongly after load release!

For  this  reason,  the  mechanically  safe  attachment  of 

the magnet in the form of a special magnet suspension 

at the end of the arm on the mobile excavator is highly 

recommended!

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

WARNING

Englisch

MOZELT GmbH & Co. KG

Load lifting magnet devices

Technical Manual:

 Electrical Power Supply T4002

Copyright:  

MOZELT GmbH & Co. KG, D-47269 Duisburg 

 

 

Edition:    May 2012 

 

-8- 

Summary of Contents for T4002

Page 1: ...g magnet devices Technical Manual Electrical Power Supply System T4002 Please observe the following safety information and recommendations before start up Copyright MOZELT GmbH Co KG D 47269 Duisburg Edition Mai 2012 www mozelt com ...

Page 2: ...ing and protection devices The manufacturer s documentation is to be observed After separating the generators from the drive unit live components and line connections must not be touched when the generator spindle is running due to the voltage All covers are to be kept closed during operation 4 Operation Installations into which the generators are built must be equipped if necessary with additiona...

Page 3: ...Operating instructions 9 4 4 Overview multi function display MFA 10 4 5 Structural design of current supply 10 4 6 Operational indicators MFA 11 4 7 Fault indicators MFA 12 All passages in the manual which are marked with the symbol Warning contain information which is important to avoid danger WARNING All passages in the manual which are marked with the symbol Caution contain information which is...

Page 4: ... the supply voltage passive protection for individuals 1 Technical description 1 1 Range of applications The MOZELT power supply system with synchronous generator is designed to supply and activate load lifting magnets on mobile excavators At present it is available with the output sizes 13 20 and 30 kW Due to the duty rating of 100 ED the generators are the optimal solution for loading and handli...

Page 5: ...cal cable connections The electrical cable connections as well as the plug connections plugs coupler are matched for the respective loads of the generators The highest demands are placed on functionality and safety If necessary please use only original spare parts 2 2 3 Generator drives Depending on the version of the mobile excavator the generator is powered mechanically or hydraulically Both var...

Page 6: ...issipated The ventilator screen must always be kept free in order to ensure an adequate supply of fresh air All heat sources must be considered when determining the ambient temperature so that the temperature does not rise above the permissible maximum value for the generator 3 2 Connections 1 Protective conductor connection Magnet connection Connection for control cable to the MFA 1 2 3 Fig 3 Con...

Page 7: ...erator 20 kW DPE 0815 Fig 5 Generator 30 kW DPE 0920 Spline shaft W 30 x 2 x 30 x 14 x 9g DIN 5480 www mozelt com Englisch MOZELT GmbH Co KG Load lifting magnet devices Technical Manual Electrical Power Supply T4002 Copyright MOZELT GmbH Co KG D 47269 Duisburg Edition May 2012 7 ...

Page 8: ...fted material after it is switched off if there is cable damage or a short circuit in the magnet feed cable This can lead to dangerous situations in the working vicinity for example if falling material causes other objects to be hurled up by lever force Furthermore it is not excluded that pieces of scrap iron may separate from the magnet during a swiveling procedure if these are located at the low...

Page 9: ...less through to the load lifting magnet If the command is given to switch off then the generator automatically leads to its demagnetization During the process of demagnetizing whereby the magnet releases its load approx 1 sec no renewed switching on command can be given Switching on of the installation is only possible if a load lifting magnet is attached to the system Switching on the magnet Oper...

Page 10: ...enerator T4002 Multi function display MFA MFD I Operating switch on the control lever Switch cable Control cable Magnet cable 220 V Connector Magnet connecting cable Load lifting magnet The essential components are 1 5 6 Function and breakdown indicators see 4 6 and 4 7 page 11 13 Relative on time of the magnetic plate in www mozelt com Englisch MOZELT GmbH Co KG Load lifting magnet devices Techni...

Page 11: ...n command given via operating switch the magnet lifts Fig 13 MFA indicates an activated magnet 2 Display LED 1 yellow Ready LED 3 red Power off Note Magnet releases the material 1 After switching off command given via operating switch magnet releases load Fig 14 MFA indicates the release of the material 3 www mozelt com Englisch MOZELT GmbH Co KG Load lifting magnet devices Technical Manual Electr...

Page 12: ...ff command given via operating switch LEDs flash 1 Fig 17 MFA indicates short circuit Display Possible cause Display Possible cause Cable break in the 220 V circuit Magnet attached wrongly or not attached Cable or connector defective Magnet defective Display Posible cause LED 1 5 flashing Short circuit in the cable system 220 V Full earth fault of the magnet Magnet too much power for electrical su...

Page 13: ...ssible cause The generator is running too fast Display Possible cause Note Turn off the engine immediately and have the speed checked in order to prevent damage to the generator LED 1 yellow Ready LED 5 red R P M not o k possibly also flashing The generator is running too slow Normal magnet operation is only possible to a limited extent lower performance is to be expected LED 5 permanent speed 220...

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