Peripheral devices
15
2
NOTE
• When the breaker on the converter unit's input side trips, check for the wiring fault (short circuit), damage to internal parts of
the inverter or the converter unit, etc. The cause of the trip must be identified and removed before turning ON the power of
the breaker.
Selecting the breaker / magnetic contactor (for 12-phase rectification)
Check the model name of the inverter and the converter unit you purchased. Appropriate peripheral devices must be selected
according to each capacity.
Choose one of the options shown above or combine them to connect the power distribution control equipment. To turn ON/
OFF the power supply, option 1 is recommended.
Refer to the following to prepare appropriate equipment.
• Option 1
To connect the equipment to the input side of the 12-phase rectifier transformer before branching, prepare the same
equipment as for the 6-phase rectifier transformer (refer to the FR-CC2-P Instruction Manual).
• Option 2
To connect the equipment to the output side of the 12-phase rectifier transformer before branching, refer to the following
table and prepare appropriate equipment.
When a single wound motor or a multi-wound motor is connected under V/F control or Advanced magnetic flux vector
Select an MCCB according to the power supply capacity.
Install one MCCB per converter unit. (For the use in the United States or Canada, refer to
to select an appropriate fuse or molded case
circuit breaker (MCCB).)
The magnetic contactor is selected based on the AC-1 class. The electrical durability of magnetic contactor is 500,000 times. When the
magnetic contactor is used for emergency stops during motor driving, the electrical durability is 25 times.
If using an MC for emergency stop during driving the motor, select an MC regarding the converter unit input side current as JEM1038-AC-3 class
rated current. When providing an MC to use the commercial power supply during general-purpose motor operation, select an MC regarding the
rated motor current as JEM1038-AC-3 class rated current.
CAUTION
When the power supply capacity of 12-phase rectifier power transformer (3-winding transformer) exceeds 3000
kVA in total (1500 kVA for delta connection and 1500 kVA for wye connection), an excessive peak current may flow
in the power input circuit, damaging the converter circuit. Observe the following precautions.
Do not perform the power reset on the output side of the transformer.
If it is inevitable to do so, turn ON the power again after 1 second when the power failure stop function is
disabled (Pr.261 Power failure stop selection = "0"), or after 10 minutes when the power failure stop function is
enabled (Pr.261 = "1, 2, 21, or 22").
Avoid wiring that allows charging to the main circuit capacitor of only one converter unit when power is shut off
or supplied at different timings to each converter unit at the time of instantaneous power failure, repowering, or
other incident.
Option 1
Option 2
Option 3
FR-CC2-P
FR-CC2-P
R/L1
S/L2
T/L3
R2/L12
S2/L22
T2/L32
R/L1
S/L2
T/L3
R2/L12
S2/L22
T2/L32
MCCB
MC
MCCB
MC
12-phase rectifier
power transformer
MCCB
MC
MCCB
MC
MCCB
MC
MCCB
MC
MCCB
MC
Summary of Contents for FR-CC2-P
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