ABB RCNA-01 Manual de usuario Pagina 49

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Installing the drive 45
ACH550-01 User's Manual
Disconnecting the internal EMC filter
On certain types of systems, you must disconnect the internal
EMC filter, otherwise the system will be connected to earth
potential through the EMC filter capacitors, which might cause
danger, or damage the drive.
Note: When the internal EMC filter is disconnected, the drive is
not EMC compatible.
The following table shows the installation rules for the EMC filter
screws to connect or disconnect the filter, depending on the
system type and the frame size.
The locations of the screws EM1 and EM3 are shown in the
diagram on page 43. The location of the screws F1 and F2 are
shown in the diagram on page 44.
Frame
sizes Screw
Symmetri-
cally
earthed TN
systems
(TN-S
systems)
Corner-
earthed
TN
systems
IT systems
(unearthed or
high-
resistance-
earthed
[>30 ohms])
Residual
current
circuit
breakers
(RDC)*
R1...R3
EM1 x x
EM3 x
R4
EM1 x x
– –
EM3 x – –
R5...R6
F1 x x
– –
F2 x x – –
x = Install the screw. (EMC filter will be connected.)
= Replace the screw with the provided polyamide screw. (EMC filter will be
disconnected.)
= Remove the screw. (EMC filter will be disconnected.)
* In case of 30 mA RDC, it is recommended to remove the screws. With
300 mA RDC, consult your local ABB Service representative.
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