GB - 85
Connection Power Unit R6-S
6.4.4 Regenerative operation at parallel operation of up to three R6-S with decoupling di-
odes
(ParalleloperationwithanerroratcurrentsharingoftheR6-Sunitsof≤10%)
N
L2.1
L1.1
L3.1
++
- -
L3.2
L2.2
L1.2
L3.2
L2.2
L1.2
24
25
21
22
12
17
43
44
33
34
13
14
L1L2
L3
L1
L2
L3
L1’
L2’
L3’
L2L1
13/K2
14/K2
A2
A1
X1A
X2C
X1B
X1B
K4
F1
K1
HF1
A1
DR1
H
S2K3
33
34
K1
H1
G1
X2B
L3
X2B
X2C
X2D
L2
L1
X2A
+PA
-
PE
U
V
W
F7
F5
G4
M
F4
- -
++
L3.2
L2.2
L1.2
24
25
21
22
12
17
43
44
13
14
L1
L2
L3
L1’
L2’
L3’
PE
L2L1
13/K2
14/K2
A2
A1
X1A
X2C
X1B
X1B
F2
K3
HF2
L2.1
L1.1
L3.1
L3.2
L2.2
L1.2
DR2
S3
H2
G2
X2B
X2A
xx
xx
PE
U
V
W
F6
G3
M
F3
N
L1L2
L3PE
D2
D1
D7
D8
D5
D6
D4
D3
L1L2
L3
L2.1
L1.1
L3.1
L3.2
L2.2
L1.2
DR3
L1
L2
L3
L1’
L2’
L3’
HF3
K4
13
14
21
22
F5
Whenconnectingtheunitsabsolutelypayattentiontocorrectphasing!Theexternalprechargingis
tobemadewithin10s!
AloaddrawfromtheDCcircuitmaybedoneonlyifrelay1isactive(readysignal).Thiscanbe
guaranteed by a series connection of the relay of the R6 units with the control release of the con-
nectedinverters(seenextsideGB-24).
In case of failure the contactors must disconnect the units from the supply system.
If the precharging due to the internal capacity of the R6 about 19.2 mF can not be done with the
inverter, use the interconnection of 4.4.3. The line contactor may be connected only after the pre-
charging of R6.
A1 Synchronizationunit(max.lengthofthephaselines1m)
further on next side