Regenerative Operation With Decoupling Diodes - KEB COMBIVERT R6 Instruction Manual

4.4.4

Regenerative operation with decoupling diodes

Regenerative inverter currents ≤ current of one COMBIVERT R6-N (with mains-operated in-
verter of type A1 or A2 and max. power ratio from inverter to regenerative unit 1.7:1)
L1
L2
L3
PE
1 Line contactor with pro-
tective wiring
1A Contactor with protec-
tive wiring
2 Main fuses
3 Mains fuse type gR
4 Radio interference filter E6
1) The cable cross-section may not be smaller than 10 mm². It must be dimensioned for the DC rated cur-
rent of the load. Otherwise appropriate fuses in the DC bus (10) are required. The indicated maximum
protection for the connected frequency inverter must be observed!
2) The contactor may only be connected if the precharging in the regenerative unit is completed. Note the permissible
DC link capacity of the charging circuit of the inverter!
3) If R6 units without internal DC-fusing are used, fuses in accordance with annex B.1.2 must be used
to be conform according to UL. The specified fuses there refer to a maximum fusing of the R6 units.
Smaller fuses according to the connected inverter can be done with fuses of the same type.
4) Mains choke xxZ1B04-1000 or harmonic filter xxZ1C04-1000 must be sized for the power supply.
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).
1
4
2
L1 L1'
L2 L2'
L3 L3'
3
5 Mains choke / harmonic filter
6 Choke (xxZ1F04-1010)
2)
7 COMBIVERT R6-N with DC
fuses
8 Decoupling diodes (see annex)
9 DC fuses type aR/gR
Connection Power Unit R6-N
1a
5
7
++
++
8
L12
L22 - -
L32 - -
PE
14
- -
PE
13
4)
3)
3)
6
10
9
14
- -
++
12
11
PE
PE
PE
13
14
14
10 DC fuses type aR/gR
4)
11 Frequency inverter (type A1, A2,
C1, C2)
12 Frequency inverter (type A1, A2
-> 4.3.1)
13 Ferrite (optional)
14 Motor
continued on the next page
1) 3)
33