Electromagnetic Compatibility; General; Rfi Filters - GE Fuji Electric AF-300ES Instructions Manual

Section 12: Electromagnetic Compatibility (CE Mark)

General

In accordance with the provisions described in the
European Commission Guidelines Document on Council
Directive 89/336/EEC GE Fuji had chosen to classify the
AF-300E$ range of drives 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 AF-300E$ drives. AF-300E$ drives up to 30 Hp 400V
series 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 perfor-
mance criteria to be met.
Immunity : EN50082-2
Emissions : EN50081-1
Mains input
terminals
Earth stud
Drive
fixing
positions
Earth STud
Load
terminals
to drive
input
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RFI Filters

It is strongly recommended that the appropriate AF-
300E$ input filter is used, as shown in the followings, to
limit RF current flowing into the main AF-300E$ supply
circuit. Without an input filter a AF-300E$ installation may
not meet statutory requirement. AF-300E$ drives contain
high-power semiconductor 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 installation 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 AF-
300E$ drive and help to ensure EMC compliance of
machinery and installations using the drive. The drives
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.
L1 L2 L3
(L N )
Line
Y
Load
(L' N')
L1' L2' L3'
X
W
Figure 12-1: RFI Filters
12-1
L
H