Risks From Mains Current And Welding Current - Fronius TimeTwin Digital Operating Instructions Manual

Do not carry out welding on containers that are being or have been used to store
gases, propellants, mineral oils or similar products. Residues pose an explosive
hazard.
Risks from mains An electric shock is potentially life threatening and can be fatal.
current and wel-
Do not touch live parts either inside or outside the device.
ding current
During MIG/MAG welding and TIG welding, the welding wire, the wirespool, the
feed rollers and all pieces of metal that are in contact with the welding wire are
live.
Always set the wirefeeder up on a sufficiently insulated surface or use a suitable,
insulated wirefeeder holder.
Make sure that you and others are protected with an adequately insulated, dry
base or cover for the earth or ground potential. This base or cover must extend
over the entire area between the body and the earth or ground potential.
All cables and leads must be secured, undamaged, insulated and adequately di-
mensioned. Replace loose connections and scorched, damaged, or inadequately
dimensioned cables and leads immediately.
Use the handle to ensure the power connections are tight before every use.
In the case of power cables with a bayonet connector, rotate the power cable
around the longitudinal axis by at least 180° and pretension.
Do not wrap cables or leads around the body or parts of the body.
The electrode (rod electrode, tungsten electrode, welding wire, etc.) must
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Double the open circuit voltage of a power source can occur between the welding
electrodes of two power sources. Touching the potentials of both electrodes at
the same time may be fatal under certain circumstances.
Arrange for the mains cable to be checked regularly by a qualified electrician to
ensure the ground conductor is functioning properly.
Protection class I devices require a mains supply with ground conductor and a
connector system with ground conductor contact for proper operation.
Operation of the device on a mains supply without ground conductor and on a
socket without ground conductor contact is only permitted if all national regula-
tions for protective separation are observed.
Otherwise, this is considered gross negligence. The manufacturer shall not be
held liable for any damage arising from such usage.
If necessary, provide adequate earthing for the workpiece.
Switch off unused devices.
Wear a safety harness if working at height.
Before working on the device, switch it off and pull out the mains plug.
Attach a clearly legible and easy-to-understand warning sign to the device to
prevent anyone from plugging the mains plug back in and switching it on again.
After opening the device:
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never be immersed in liquid for cooling
Never touch the electrode when the power source is switched on.
Discharge all live components
Ensure that all components in the device are de-energised.
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