Regenerative Operation At Parallel Operation Of Up To Three R6-S With Decoupling Diodes - KEB Combivert R6-S Instruction Manual

4.4.5

Regenerative operation at parallel operation of up to three R6-S with decoupling diodes

(Parallel operation with an error at current sharing of the R6-S units of ≤10 %)
1
L1
L2
L3
PE
1 Mains fuses
2 Mains contactor
2a Regenerative contactor
3 Mains fuses type gR
4 Radio interference filter
1) A mains choke with uk=4 % is mandatory required for reduction of circulating currents.
2) The cable cross-section may not be smaller than 10 mm². It must be dimensioned for the DC rated
current of the load. Otherwise there are fuses in the DC circuit (10) necessary The indicated maximum
protection for the connected drive controllers must be observed !
3) If the inverter current > inverter current of the COMBIVERT R6-S, it must be wired at an external termi-
nal (12).
4) The mains contactor may only be connected if the precharging in the DC bus of the regenerative unit is
completed.
5) Parallel connection of the drive controller and R6-S causes a circulating current in regenerative opera-
tion. It is depending on the inductance of the mains choke. The total regenerative power is 75...90 % of
the R6-S regenerative power.
4
3
L1 L1'
L2 L2'
L3 L3'
2a
4
3
L1 L1'
L2 L2'
L3 L3'
12
2
4
L1 L1'
L2 L2'
L3
L3'
5 Commutation reactor
6 Mains choke
4)
7 COMBIVERT R6-S
8 Inverter (type A1/A2 or B1/B2)
same type and size
Connection Power Unit R6-S
7
X2B
++
5 X2B
X2C
++
L1.1 L1.2 L12
L22 - -
L2.1 L2.2
L3.1 L32 PE - -
L3.2
X2B ++
5
++
L1.1 L1.2 L12
L22 - -
L2.1 L2.2
L3.1 L3.2 L32 PE - -
6
PE
L1
8
- -
L2
-
L3
PE
9
6
PE
L1
8
- -
L2
-
L3
PE
9
5) 6)
1) 5)
13
7
13 12
10
11
9 Motor
10 DC fuses type aR/gR
11 DC fuses type aR/gR
12 External terminal
13 Decoupling diodes (see annex)
continued on the next page
2)
3)
GB - 33