Vacon 20 - 3.1.5 Changing the EMC protection class from C2 or C3 to C4

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3.1.5 Changing the EMC protection class from C2 or C3 to C4
The EMC protection class of MI1-3 frequency converters can be changed from class
C2 or C3 to class C4 by removing the EMC-capacitor disconnecting screw, see fig-
ure below. MI4 & 5 can also be changed by removing the EMC jumpers.
Note! Do not attempt to change the EMC level back to class C2 or C3. Even if the pro-
cedure above is reversed, the frequency converter will no longer fulfil the EMC re-
quirements of class C2 / C3!
Figure 3.13: EMC protection class, MI1 - MI3
Figure 3.14: EMC protection class, MI4