Wiring Scheme 'B' With Single Regen Unit - KEB combivert R6-S Instruction Manual

Connection Power Unit

4.4.4 Wiring Scheme 'B' with Single Regen Unit

L1
①
L2
L3
PE
2
1 Main line contactor
2 Regen contactor
3)
3 Inverter line fuse UL class J
4 Regen line fuse UL class J
5 HF fi lter (optional)
1) KEB recommends using fast acting class J fuses only (ex. Bussman type JKS). For applications with KEB Harmonic Filters and an isolation
transformer, a high speed class J fuse must be used (only Ferraz type HSJ is approved).
2) Current sharing between the R6-S and the frequency inverter must be taken into consideration during motor (supply) operation. The current
sharing is dependent on the uk value (voltage drop across the choke) and the nominal current of the line choke (see formula below). If too much
current fl ows through the R6 unit, a second R6 unit should be used in parallel with the fi rst.
3) The regenerative contactor may only be closed if the pre-charging of the DC bus circuit of the inverter is completed. A relay output on the R6
unit can provide the control for this contactor. See Section 4.5.1.
4) A line choke with minimum Uk=3 % is required for all inverters equal to or greater than size 23 for 480V units or size 20 for 230v units. Additionally
a line choke is also recommended in general to minimize circle current which can fl ow between the R6 unit and the frequency inverter during
regen operation. This circle current can reduce the available capacity of the R6 unit by 10-25% depending on the value of the choke connected
to the inverter and the commutation choke.
Wiring Scheme B should only be utilized with R- and U-Housing F5 Elevator Drives. The
drive housing is indicated in the part number's seventh digit (e.g. xx.F5.A1H-xxxx,
xx.F5.A1R-xxxx, xx.F5.A1U-xxxx).
Sizings with harmonic fi lters must utilize Wiring Scheme A (Sections 4.4.2 and 4.4.3) and
should only be used in combination with harmonic fi lters from KEB.
US - 20
5 6
3
L1 L1'
L2 L2'
L3
L3'
⑦
5
4
L1 L1' L1.1
L2 L2' L2.1
L3 L3.1
L3'
6 Inverter line choke
7 Commutation choke
1) 8 COMBIVERT R6-S
9 Frequency Inverter
1)
10 Motor
⑧
X2B X2B ++
++
L1.2 L12
L2.2 L22 - -
L32
L3.2 - -
PE
2) 4)
2) 4)
- -/
++/
-
+PA
9
PE
PE
10