8 Guidelines for electrical installation
8.3 Electromagnetic Compatibility (EMC)
188
XI/ON: XNE-GWBR-2ETH-IP
09/2011 MN05002007Z-EN
www.eaton.com
8.3
Electromagnetic Compatibility (EMC)
XI/ON products comply in full with the requirements pertaining to EMC regulations.
Nevertheless, an EMC plan should be made before installation. Hereby, all potential electro-
mechanical sources of interference should be considered such as galvanic, inductive and
capacitive couplings as well as radiation couplings.
8.3.1
Ensuring Electromagnetic Compatibility
The EMC of XI/ON modules is guaranteed when the following basic rules are adhered to:
• Correct and large surface grounding of inactive metal components.
• Correct shielding of cables and devices.
• Proper cable routing – correct wiring.
• Creation of a standard reference potential and grounding of all electrically operated
devices.
• Special EMC measures for special applications.
8.3.2
Grounding of inactive metal components
All inactive metal components (for example: switchgear cabinets, switchgear cabinet doors,
supporting bars, mounting plates, tophat rails, etc.) must be connected to one another over a
large surface area and with a low impedance (grounding). This guarantees a standardized
reference potential area for all control elements and reduces the influence of coupled distur-
bances.
• In the areas of screw connections, the painted, anodized or isolated metal components
must be freed of the isolating layer. Protect the points of contact against rust.
• Connect all free moving groundable components (cabinet doors, separate mounting plates,
etc.) by using short bonding straps to large surface areas.
• Avoid the use of aluminum components, as its quick oxidizing properties make it unsuitable
for grounding.
8.3.3
PE connection
A central connection must be established between ground and PE connection (protective
earth).
8.3.4
Earth-free operation
Observe all relevant safety regulations when operating an earthfree system.
Warning
The grounding must never – including cases of error – take on a dangerous touch
potential. For this reason, always protect the ground potential with a protective
cable.
