GB - 15
R4
-IN
-OUT +OUT
+IN
L1_2
PE
L1
L2
L3
L2_2
L3_2
PE
L1 L2 L3
FU
+U
ZK
-U
ZK
L1
L2
L3
U V W
HF-
Filter
(R4)
PE
M
3~
3
L1
L2
L3
L1
L2
L3
L3'
L3'
L2'
L2'
L1'
L1'
Installation
4.2.1
Standard Connection
The R4-S-regenerative unit must be protected on the three input lines (utilization
category gL) and in the DC-bus with semiconductor fuses (utilization category
gR). The values of the fuses are described in the table 2.4 ‘technical data’. The
semiconductor fuses are sized for a protection of the semiconductors but they
don’t have the function to protect conductor cross-sections. To avoid invalid,
high commutation notches, a commutating choke (Art.No: see 2.4 Technical data)
must be connected on line side. The connection of the synchronization lines
must be executed via back-up fuses with max. 4A (according to VDE power
protection) with twisted cable 0,75 mm
2
.When using a KEB HF-Filter (R4) (Art.No:
see 2.4 Technical data) the protection for synchronization connections are not
required.
Synchronisation:
L1, L2, L3 -mains with L1, L2, L3 the R4-S-regenerative unit;
Pay attention to correct phase sequence assignment of L1, L2, L3 and L1_2,
L2_2, L3_2 !
I
nom. inverter
< I
nom. feedback unit
