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Switch off unused devices.
Disconnect the mains plug before working on the device.
Attach a clearly legible and easy-to-understand warning sign to the device to prevent any-
one from plugging the mains plug back in and switching it on again.
After opening the device:
- Discharge all live components
- Ensure that all components in the device are de-energised.
If work on live parts is required, appoint a second person to switch off the main switch at
the right moment.
The housing screws provide an adequate ground conductor connection for earthing the
housing. The screws must never be replaced with different screws unless a reliable ground
conductor connection is set up.
EMC Device Clas-
sifications
Devices in emission class A:
- Are only designed for use in industrial settings
- Can cause line-bound and radiated interference in other areas
Devices in emission class B:
- Satisfy the emissions criteria for residential and industrial areas. This is also true for
residential areas in which the energy is supplied from the public low-voltage mains.
EMC device classification as per the rating plate or technical data.
EMC measures Warning, electromagnetic field. Electromagnetic fields may pose as yet unknown risks
to health.
It is the operator's responsibility to ensure that no electromagnetic interference occurs in
electrical and electronic devices.
If electromagnetic interference is detected, the operator is obliged to take action to rectify
the situation.
Check for possible problems, and check and evaluate neighbouring devices' resistance to
interference according to national and international requirements:
- Safety devices
- Power, signal and data transfer lines
- IT and telecommunications devices
- Measuring and calibrating devices
- Health of neighbouring persons
Supporting measures for avoidance of EMC problems:
1. Mains supply
- If electromagnetic interference arises despite the correct mains connection, addi-
tional measures are necessary (e.g. use of a suitable line filter)
2. Shielding, if necessary
- Shield off other nearby devices
- Shield off entire welding installation
3. Do not have any magnetic or electronic data carriers about your person:
magnetic or electronic data carriers can be damaged by the magnetic fields generated
when the device is in use.
4. Do not have any watches or pieces of metal about your person. Watches can be dam-
aged when the device is in use.
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