Galvanic Isolation (Pelv) - Danfoss FCM305 56 Instruction Manual

Danfoss FCM 300 Series Motor and CE Labeling
CE labeling is a positive feature when used for its
original purpose, i.e. to facilitate trade within the EU
and EFTA.
However, CE labeling may cover many different
specifications. This means that it has to be checked
what a given CE label specifically covers.
The specifications covered can in fact be widely
different. That is why a CE label can give the
installer a false feeling of security when using a FCM
300 as a component in a system or an appliance.
We CE label our VLT ® DriveMotors in accordance
with the low-voltage directive. This means that as
long as the FCM 300 is installed correctly, we
guarantee that it complies with the low-voltage
directive. We issue a declaration of conformity that
confirms our CE labeling in accordance with the
low-voltage directive.
The CE label also applies to the EMC directive, on
condition that the instructions given in the Operating
Instructions for EMC-correct installation and filtering
have been followed. On this basis, a declaration of
conformity in accordance with the EMC directive is
issued.
We offer the filters that can be seen from the
specifications and gladly provide other types of
assistance that can help you obtain the best EMC
result.
Galvanic isolation
MG.03.B6.2G - VLT is a registered Danfoss trademark
FCM 300 Series

Galvanic Isolation (PELV)

PELV offers protection by way of extra low voltage.
Protection against electric shock is considered to be
ensured when all connected devices are of the
PELV type and the installation is made as described
in local/national regulations on PELV supplies.
In FCM 300 Series all control terminals are supplied
from or in connection with extra low voltage (PELV).
Galvanic (ensured) isolation is obtained by fulfilling
requirements concerning higher isolation and by
providing the relevant creapage/clearance
distances. These requirements are described in the
EN 50178 standard.
The components that make up the electrical
isolation, as described below, also comply with the
requirements concerning higher isolation and the
relevant test as described in EN 50178.
The galvanic isolation can be shown in three
locations (see drawing below), namely:
1. Power supply (SMPS) incl. signal isolation of
U , indicating the intermediate current voltage.
DC
2. Gate drive that runs the IGBTs (opto-couplers).
3. Current transducers (opto-couplers).
17-3