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Frequency Converter Wiring
Conditions for DC-bus with external DC power supply
DC-bus voltage is within the specified range: 457...745 V.
●
Use mains choke.
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Select fuses according to
●
Use the relay output of the frequency converter to control the contactor MC
●
of the DC-bus. The contactor will be switched off by the relay output once the
frequency converter encounters an error.
For 5K50...18K5 models, select the external softstart resistor according to the
●
allowed maximum charging current defined in the table below.
Model
Maximum charging current [A]
5K50
7K50
11K0
15K0
18K5
22K0...90K0
110K
132K
160K
Tab. 8-9: Allowed maximum charging current
①
: 22K0...90K0 models do not need external softstart resistor.
Set [E2.15] = '14: Converter error' to control MC by relay output of FC. Con-
●
nect relay output of FC to MC.
By default, the relay output is inactive when there is no error. Please
use an additional device to keep the relay output status when the
frequency converter is switched off without power input. Without
such a device, the relay output will be restored to be inactive as the
frequency converter will lose the control.
WARNING
The external softstart circuit must be properly controlled to avoid direct charg-
ing of the capacitor with external DC power supply, especially when DC power
supply is the only power source for the frequency converter.
Bosch Rexroth AG R912005854_Edition 09
Rexroth Frequency Converter EFC x610
chapter "DC-bus fuse specification" on page
25
35
50
75
100
–
①
300
350
450
Series
71.
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