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Elektrotechnische Anlagen GmbH
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Placing of the commutation choke
If the frequency converter is connected to an external commutation choke, the connection
of the power feed/feedback unit has to be done at its network terminals (figure 2.6.3). Is
the connection done at the load terminals of the commutation choke it's inductivity pre-
vents the synchronising to the supplying net and the induction voltage of the choke when it
is switched of under load may result in damages to the power feed/feedback device.
Danger!
Over voltages may cause serious damages to the connected frequency inverter and /or to the
power feed/feedback unit and to the other loads.
M
60kW
FC
Mains supply
REVCON
Not allowed!
Figure 2.6.3
The same things apply to the also non-admissible pre-connection of further commutation
chokes.