19
Instruction Manual
AFQm
3.5.- CONNECTION
Wall and Rack type AFQm
models
:
Use cables of a cross-section suitable for the rated current of the filter and that
comply with the standards of the country in which they are being installed.
The earth conductor must have at least the same cross-section as the phase
conductors. If the phase conductors exceed 16 mm
2
, the earth conductor will be
at least 16 mm
2
. If the phase conductors exceed 32 mm
2
, the earth conductor can
be the half of the cross-section of the phase conductors
For
100A models
(
AFQm-xxx-100M
and
AFQm-xxx-100R
), under certain cir-
cumstances, the contact current may exceed 3.5 mA ~.
The recommended minimum cross-sections are:
AFQm-xxx-030M :
16 mm
2
AFQm-xxx-060M :
25 mm
2
AFQm-xxx-100R
and
AFQm-xxx-100M :
50 mm
2
Neutral conductor cross-section must suit the expected neutral current and must
be selected according to the external protection devices.
Cabinet
type AFQm
models
:
For the cabinet’s power supply, a cable with a cross-section suitable for the max-
imum current that can flow through the device must be used. Although the device
is composed of 100 A modules, to make installation easier, the modules are al-
ready wired, and the user only has to take into account the device’s total capacity.
The recommended minimum cross-sections are:
AFQm-xxx-100C :
50 mm
2
AFQm-xxx-200C :
70 mm
2
AFQm-xxx-300C :
150 mm
2
AFQm-xxx-400C :
240 mm
2
Neutral conductor cross-section must suit the expected neutral current and must
be selected according to the external protection devices.
Ensure that the
AFQm
is earthed correctly to prevent the risk of electric shock.
To measure the current, class
0�2S
transformers of the
TC
or
TCH
series are
recommended.
The use of transformers with ratios close to the current to be measured is recom-
mended.
The correct connection of the current transformers is vital for the
AFQm
filters to
operate properly. If the phases L1, L2 and L3 are switched in the secondary, the
filter will not work properly.
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