If they are reversed, the emitted field level will abnormally high.
■ Standards
• Recommendations WHO ICNIRP (World Health Organization/International Commission Non-Ionizing
Radiation Protection)
• IEEE C95.
These are devices positioned after the fuse corresponding the circuit the room
Detailed product brochures can downloaded from www.6-2002 (international standard public, kHz range)
• European directive 1999/519/CE (public, 100 kHz range and above)
• European directive 2004/40/CE (workers, 100 kHz range and above)
• 2010 draft standard, ENIEC 62493 (lighting systems)
• EN50366 standard, superseded IEC 62233 2012 (domestic electrical appliances)
■The Solution Testing Measuring
■ Corrective action
A survey needs carried out determine the necessary corrective action.
• computer, printer, fax
• lighting
• high-voltage line, transformer, railway track, etc. These are units positioned after the fuse correspond the circuit in
the room.
Low-frequency fields between and 100 kHz are harmful.
There are various types equipment available for limiting electric fields:
• sheaths prewired with H07-VU screened phase wires
• screened wires and cables.
• Connect and test the earths the electrical installation correctly
• For equipment not connected earth, you must check that the Ph/N are connected properly.
• automatic bipolar current cut-off devices. The electric field drained earth via the earth connection the screening.metrix.Applications/Illustrations
In housing and office buildings, there are many sources low-frequency electric fields which
contribute the overall electromagnetic pollution our day-to-day environment:
• distribution electrical energy housing and office buildings
• surge-protector power bar, electrical cables, etc. These cables give their full effect when the screens are hooked the earth net
works.
• equipment casings fitted with metal screen mounted the rear.
The intensity the electric fields inversely proportional the distance.fr
. They are designed automatically cut off the voltage causing electric fields when the last instru
ments lights are switched off.
• Make sure that areas where people spend time immobile are safe distance from potential field sources.
This helps reduce electrical radiation from the casing, cable and equipment.
