Emc Instructions; Emc Conforming Installation - KEB combivert R6-S Instruction Manual

EMC instructions

2.4 EMC instructions
The COMBIVERT R6-S represents electrical equipment designed for use in industrial and commercial installations.
In accordance with the EMC directive 89/336/EEC, it is not mandatory to mark these devices as they represent
components to be further handled by the respective machine and system manufacturer and are not operable
independently according to the EMC directive. The person installing / operating the machine / system is obliged
to prove the protective measures demanded by the EMC directive are complied with. The prescribed ratings
can usually be complied with when using the radio interference voltage fi lters as specifi ed by KEB, and when
observing the following measures and installation guidelines.
2.5

EMC conforming installation

The COMBIVERT R6 is designed to be used in a second environment as defi ned in EN 61800-3 (unit with its own
supply transformer). Take additional measures when using it in the fi rst environment (residential and commercial
area connected to public low-voltage line)!
• Install the control cabinet or system in an appropriate and correct manner (see chapter "control cabinet
installation")
• To avoid coupled noise, separate during installation high voltage supply lines, motor lines, control and data
lines (low-voltage level < 48V) and leave a space of at least 6.0 inches, 15 cm between them.
• In order to maintain low-resistance high frequency connections, grounding and shielding, as well as other
metallic connections (e.g. mounting plate, installed units), must be made with bare metal to metal contact with
the mounting plate, over as large a surface area as possible. Use ground conductors with a section as large
as possible, minimum #4 AWG (16mm
• Only use shielded cable with copper or tin-plated braid, since steel braid is not suitable for high frequency
ranges. The shield must always be connected to the ground bare on the unit or fastened with clamps to the
bare metal of the sub mounting plate. Do not connect the shield using the drain wires alone, this reduces the
effectiveness of the shield by 70%!
• If external interference suppression fi lters are used, then these must be installed as close as possible <12
inches (30 cm) to the interference source and must be in metal to metal contact with the sub mounting plate,
over as large a surface area as possible.
• Always equip inductive control elements, (contactors, relays etc.), with suppressors such as varistors, RC-
elements or diodes.
All connections must be kept as short as possible and as close as possible to the ground plane. Free fl oating
cables act as active and passive antenna.
• Keep connection cables straight (do not loop). Tie all spare unassigned wires at one end to the ground.
• The twisted pair cables should be used when the conductors are not shielded in order to dampen common-
mode noise.
• The cable for phase synchronization between the commutation choke and COMBIVERT R6-S may not exceed
a line length of 39 inches (1 m) .
• Further information can be found on the internet, see "www.kebamerica.com".
US - 10
) or use thick ground straps.
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