Tweco 250i Transmig Inverter - Manual (Page 22)

TRANSMIG 250i INSTALLATION/SETUP
INSTALLATION/SETUP 3-4 Manual 0-5187
4. Equipotential Bonding
Bonding of all metallic components in the welding installation and adjacent to it should be considered. However,
metallic components bonded to the work piece will increase the risk that the operator could receive a shock by
touching the metallic components and the electrode at the same time. The operator should be insulated from all
such bonded metallic components.
5. Earthing/grounding of the Work Piece
Where the work piece is not bonded to earth for electrical safety, nor connected to earth because of its size and
position, e.g. ship’s hull or building steelwork, a connection bonding the work piece to earth may reduce emissions
in some, but not all instances. Care should be taken to prevent the earthing of the work piece increasing the risk
of injury to users, or damage to other electrical equipment. Where necessary, the connection of the work piece to
earth should be made by direct connection to the work piece, but in some countries where direct connection is not
permitted, the bonding should be achieved by suitable capacitance, selected according to national regulations.
6. Screening and Shielding
Selective screening and shielding of other cables and equipment in the surrounding area may alleviate problems
of interference. Screening the entire welding installation may be considered for special applications.
3.06 Power Source Controls, Indicators and Features
Fault
Process
Trigger
Power
2T Normal
STICK
LIFT TIG
MIG
4T Latch Amps Volts
Push For Inductance
Advanced
Features
Wirespeed Arc Control
ON OFF
Left Knob Right Knob
Art # A-10123
1
2 3
4
5
6
7 8 9 10
Figure 3-1: Transmig Control Panel