Safety information
page 24
ELTROPLAN-REVCON
Connection of further loads
The connection of further loads ( e.g. cabinet ventilation or climatisation)
parallel to the frequency inverter / power feedback unit at a common circuit
breaker like in figure 2.6.5 is not allowed. If it's done nevertheless, in case of
tripping of the circuit breaker the connection to the network ( energy sink and
synchronising element for the power feedback unit) misses. The IGBT's now
switch the DC-voltage directly to the other loads. The resulting nearly rectan-
gular "net"-voltage drives a current through the loads, which level and form
depends on their impedance. Is the power consumption of the loads to small,
the DC-voltage and also the output voltage of the power feedback unit rises
during the backfeed operation. This increased voltage may damage all con-
nected components.
Figure 2.6.5
M
60kW
FU
Supplying network
M
wrong
false
REVCON
