Figure 20: Regenerative Operation At Parallel Operation - KEB COMBIVERT R6 Instruction Manual

4) In case of parallel connection of R6-N the total power can be lower up to 10 % caused by production toler-
ances of the commutation reactor /harmonic filter.
5) Main- and DC fuses must be monitored.
6) Mains choke / harmonic filter must be sized for the power supply.
When connecting the units absolutely pay attention to correct phasing!
Connection clockwise rotating field required!
A load draw from the DC circuit may be done only if the ready signal is active (see page GB - 26).
In case of failure the contactors must disconnect the units from the supply system.
Parallel connection requires a base load per R6-N greater than 10%.
Figure 20: Regenerative operation at parallel operation
Connection of the control release of the connected inverters
A load draw in the DC circuit may be done only when the message „ready" is set. This can
be guaranteed by a series connection of relay R1 of the R6-N units with the control release
of the connected inverters.
G1, G2 Regenerative unit COMBIVERT R6
X2A Control terminal strip
24
25
26
G3, G4 Frequency inverter
X2A Control terminal strip
STO Control release
24V 24V output
0V
S3, S4 Control release
G1
24
X2A 25
26
G2
24
X2A 25
26
Relay 1 / NO contact
Relay 1 / NC contact
Relay 1 / switching contact
Mass
Connection Power Unit R6-N
24V
S3
STO
G3
0V
0V
STO
S4
G4
24V
Ready for operation relay
General terminal assignment for frequency
inverters
37