Installation
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BA9300SU EN 2.1
4.3 Installation of a CE-typical drive system
General notes • The electromagnetic compatibility of a machine depends on the type of installation and care taken. Please observe:
– Assembly
– Filters
– Shielding
– Grounding
• For diverging installations, the conformity to the CE EMC Directive requires a check of the machine or system regarding the EMC limit
values. This is for instance valid for
– Use of unscreened cables
– Use of group RFI filters instead of assigned RFI filters
– Operation without mains filter
• The compliance of the machine application with the EMC Directive is in the responsibility of the user.
– If you observe the following measures, you can assume that the machine will operate without any EMC problems caused by the drive
system, and that compliance with the EMC Directive and the EMC law is achieved.
– If devices which do not comply with the CE requirement concerning noise immunity EN 50082-2 are operated close to the controller,
these devices may be disturbed electromagnetically by the controllers.
Assembly • Connect controller, mains choke, and mains filter to the grounded mounting plate with a wire of large a cross-section as possible:
– Mounting plates with conductive surfaces (zinc-coated, stainless steel) allow permanent contact.
– Painted plates are not suitable for installation in accordance with the EMC.
• If you use several mounting plates:
– Connect as much surface as possible of the mounting plates (e.g. with copper bands).
• Ensure the separation of motor cable and signal or mains cable.
• Do not use the same terminal strip for mains input and motor output.
• Cable guides as close as possible to the reference potential. Unguided cables have the same effect as aerials.
Filters • Use mains filters or RFI filters and mains chokes which are assigned to the controller:
– RFI filters reduce impermissible high-frequency interference to a permissible value.
– Mains chokes reduce low-frequency interferences which depend on the motor cable and its length.
– Mains filters combine the functions of mains choke and RFI filter.
Shielding • Connect the screen of the motor cable to the controller
– to the screen connection of the controller.
– additionally to the mounting plate with a surface as large as possible.
– Recommendation: For the connection, use ground clamps on bare metal mounting surfaces.
• If contactors, motor-protecting switches or terminals are located in the motor cable:
– Connect the screens of the connected cables also to the mounting plate, with a surface as large as possible.
• Connect the screen in the motor terminal box or on the motor housing to PE:
– Metal glands at the motor terminal box ensure a connection of the screen and the motor housing.
• If the mains cable between mains filter and controller is longer than 300mm:
– Screen mains cables.
– Connect the screen of the mains cable directly to the inverter and to the mains filter and connect it to the mounting plate with as large a
surface as possible.
• Use of a brake chopper:
– Connect the screen of the brake resistor cable directly to the mounting plate, at the brake chopper and the brake resistor with as large a
surface as possible.
– Connect the screen of the cable between controller and brake chopper directly to the mounting plate, at the inverter and the brake
chopper with a surface as large as possible.
• Screen the control cables:
– Connect both screen ends of the digital control cables.
– Connect one screen end of the analog control cables.
– Always connect the screens to the screen connection at the controller over the shortest possible distance.
• Application of controllers in residential areas:
– To limit the radio interference, use an additional screen damping
≥ 10 dB. This is usually achieved by installation in enclosed and
grounded control cabinets made of metal.
Grounding • Ground all metallically conductive components (controller, mains filter, motor filter, mains choke) using suitable cables connected to a
central point (PE bar).
• Maintain the minimum cross-sections prescribed in the safety regulations:
– For the EMC, not the cable cross-section is important, but the surface and the contact with a cross-section as large as possible, i.e. large
surface.
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