Safety information
24
Operating instructions DC(S)
ELTROPLAN
-
REVCON
Elektrotechnische Anlagen GmbH
Connection of further loads
The connection of further loads (e.g. cabinet ventilation or climatisation)
parallel to the frequency inverter / power feed/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 feed/feedback unit) misses. The IGBT's now switch the DC-voltage directly to the
other loads. The resulting nearly rectangular "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 feed/feedback unit
rises during the feed back operation. This increased voltage may damage all connected
components.
M
60kW
FC
Supplying network
M
Right
False
REVCON
Figure 2.6.5