TOYODenki VFDB2009 Series, Operation Manual

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8.3 Parallel operaton method with VFDB series
8.3.1 Setup of VFDB2009 series
The parallel operation of only VFDB2002 series is "Method of Master/Slave" with which DB operation
voltage detects and the master unit set up in DB unit takes out instructions of ON/OFF of switching device
(IGBT) to Slave unit. Therefore, in the case of the parallel operation of VFDB2002 series and VFDB2009
series, it is considered as a setup of the master/slave of VFDB2009 series. Refer to "5.2.2 Set-up of single
or Master/Slave system paralle operation" for the setting method. In addition, either VFDB2009 series or
VFDB2002 series can use a master unit. In VFDB2002 series and VFDB2009 series differs from to change
of power supply voltage and to set of stopping voltage of DB operation. Refer to the instructions manual
of VFDB2002 series.
8.3.2 Connection
In the case of the parallel operation of VFDB2009 series and VFDB2002 series, it connects like Figure 8.1.
52MAX
M
U V W
SHT
OCRY
MCCB
MC
R S T
52MAX
1
2
1 2 3 4 5 6 8 9 7
P PR N
OCRY
DBR
CN2
CN3
400V
200V
TH
8 8 8
TB2
DB_IN DB_ON 86A 52MA
DB Unit
Mater
1 2 3 4 5 6 8 9 7
P PR N
OCRY
DBR
CN2
CN3
400V
200V
TH
8 8 8
TB2
DB_IN DB_ON 86A 52MA
DCL
※
DB Unit
Slave
※
Inverter Operation command
400V Line
at
400V/200V
Transfomer
Inverter Operation
Contact (52MA)
INVERTER UNIT
RUNNING SIGNAL
D.C. Busbar
DB Voltage
DC/DC
Converter
Slave Master Protection
DB Operation
DB Voltage
DC/DC
Converter
Slave Master Protection
DB Operation
6parallels
or less
Figure 8.1 Example of wiring at the time of a parallel operation with VFDB2002 series
※
1
：
Change the connector on DB unit according to the voltage system of an inverter. Refer to "5.2.1
Change of power supply voltage" for details.
※
2
：
Wiring of VF66 inverter should follow the instructions manual of inverter each model.
※
3
：
Inside of a figure 3 of a part of the connection example wires for the twist. Please lay out the