- 91 -
13 Electromagnetic Compatibility (EMC)
13-1 General
In accordance with the provisions described in the European Commission Guidelines Document on
Council Directive 89/336/EEC, these drives are classified as as "Complex Components".
Classification as a "Complex Components" allows a product to be treated as an "apparatus", and thus
permits compliance with the essential requirements of the EMC Directive to be demonstrated to both
an integrator of VM10 Drives and to his customer or the installer and the user.
VM10 Drives are supplied `CE-marked', signifying compliance with EC Directive 89/336/EEC
when fitted with specified filter units installed and grounded in accordance with this sheet.
This Specification requires the following performance criteria to be met.
EMC product standard
EN61800-3/1996
Immunity :
Second environment
( Industrial environment )
Emission :
First environment
( Domestic environment )
Finally, it is customer
’
s responsibility to check whether the equipment conforms to EMC
directive.
13-2 RFI Filters
It is strongly recommended that the appropriate VM10 input filter is used, as shown in the following
table, to limit RF current flowing into the main supply circuit. Without an input filter a VM10
installation may not meet statutory requirement. The drives contain high-power semi-conductor
devices which are switched at high speeds to synthesize a near-sinusoidal current wave form across
the frequency range of output. Rapidly-changing voltages and currents will generate some degree of
electromagnetic emission. Emissions will be predominantly conducted through the motor and the
mains supply cables, although some radiated emissions will be detected in close proximity to the
drive system. It is essential that precautions are taken both at the design stage and at the time of in-
stallation to prevent radio frequency interference (RFI) from the drive system affecting sensitive
equipment in close proximity.
The RFI filters range are designed especially for the VM10 Drive and help to ensure EMC com-
pliance of machinery an installations using the Drives. The Drives single phase series may be
mounted on top of the filter using the integral fixing positions, the intention being that valuable space
inside wiring cabinets may be saved. (Refer to Table 13-2-2)
