Eurotherm 584SV Series, Product Manual, Page: 211 / 255

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The unit, when installed for Class A or Class B operation, will be compliant with EN55011
(1991)/ EN55022 (1994) for radiated emissions, as described below.
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The unit is installed for Class A operation when wall mounted using the recommended ac supply
filter and having complied with all cabling requirements.
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•
A single-star point earthing policy as shown in Error! Reference source not found. is
required.
•
The protective earth connection (PE) to the motor must be run inside the screened cable
between the motor and VSD and be connected to the protective earth terminal in the gland
box, or on the VSD.
•
The ac supply filter must be permanently earthed. Refer to Chapter11: “Technical
Specifications” - Earthing/Safety Details.
•
The signal/control cables should be screened.
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The unit is installed for Class B operation when mounted inside a cubicle having 10dB
attenuation between 30 and 100MHz (typically the attenuation provided by a metal cabinet with
no aperture of dimension greater than 0.15m), using the recommended ac supply filter and
having met all cabling requirements.
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The VSD, external filter and associated equipment are mounted onto a conducting, metal
mounting panel. Do not use cubicle constructions that use insulating mounting panels or
undefined mounting structures. Cables between the VSD and motor must be screened or
armoured and terminated at the VSD or locally on the back panel.
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Apply a single point
series earthing
strategy for a single
VSD mounted in a
cubicle as shown.
The protective earth
connection (PE) to
the motor must be
run inside the
screened cable
between the motor
and VSD and be
connected to the
motor protective
earth terminal on the
VSD.
584SV
Back Panel
Cubicle
Motor
AC Supply
U-clip used to
terminate screen
connection to
the back panel
Armoured/screened cable
As short as possible
(0.3 metres maximum)
External
Filter
PE2 PE1 PE1 PE2
Additional PE connectors for Type 4 only,
or where PE1 is <10mm cross-section
2
(Types 5, 6, 7)
As opposite, but additionally indicates
a required second PE connection to the
filter on the Type 5
Figure 3-1 EMC and Safety Earthing Cabling