GB - 17
Prevent
Disturbances
R4
-IN
-OUT +OUT
+IN
L1_2
L2_2
L3_2
PE
DC-FU
++
--
U V W
PE
DC-FU
++
--
U V W
PE
M
3~
M
3~
L1 L2 L3
PE
L1
L2
L3
HF-
Filter
(R4)
3
L1
L2
L3
L1
L2
L3
L3'
L3'
L2'
L2'
L1'
L1'
Terminals
„++“ / „--“
4.2.3
R4-S as feedback and supply unit
Additionally to the feedback function the R4-S-regenerative unit can be used as
a B6-full wave rectifier. In this case the R4-S-regenerative unit serves as a DC-
supply for one or several frequency inverters which are running on a common
DC-bus. Pay attention to the following notes:
•
The connected frequency inverters must be DC-frequency inverters, that
means they must have a precharge unit (loading shunt in DC-bus). If the inverter
has not a precharge unit in the DC-bus, then the R4-S-regenerative unit will
be destroyed.
•
Only use the mains commutating choke described by KEB.
• The average value of the taken direct current must not exceed the max.value
of the direct current (I
DC MAX
)!
•
In case that the R4-S-regenerative unit is used as regenerative and supply
unit, a parallel operation of the R4-S-regenerative unit is not possible!
• If there are several frequency inverters connected to the R4-S Feedback unit,
the maximum permissible DC-link capacities of all connected inverters during
supply operation must be observed! (see table)
I
nom.
feedback
>
∑
I
nom. inverter
Installation
Generally there must be a charging current limit at the input of DC frequency
inverter. The terminal markings "++" and "--" are valid for KEB inverter and there
can be customer specific variations.
Voltage class
200V
400V
Part number
12.R4.S0G.3201
15.R4.S0G.3201
14.R4.S0G-3401
18.R4.S0G-3401
22.R4.S0R-3401
max. perm. add. DC-link capacity
µF
3.800
3.500
1.300
1.000
5.000