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2.6 Selecting the breaker/magnetic contactor
Check the model name of the inverter and the converter unit you purchased. Appropriate peripheral devices must be
selected according to each capacity.
Refer to the table below to prepare appropriate peripheral devices.
400 V class
Motor output
Applicable converter
*1
model
[kW]
315
FR-CC2-H315 kW
355
FR-CC2-H355 kW
400
FR-CC2-H400 kW
450
FR-CC2-H450 kW
500
FR-CC2-H500 kW
560
FR-CC2-H560 kW
630
FR-CC2-H630 kW
*1
Assumes the use of a Mitsubishi 4-pole standard motor with the power supply voltage of 400 V AC 50 Hz
*2
Select an MCCB according to the power supply capacity.
Install one MCCB per converter.
MCCB
Converter unit
MCCB
Converter unit
For the use in the United States or Canada, provide the appropriate UL and cUL listed fuse that is suitable for branch circuit protection.
(Refer to page 30)
*3
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 converter unit capacity is larger than the motor capacity, select an MCCB and an MC (magnetic contactor)
according to the converter unit model, and select cables and reactors according to the motor output.
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.
Molded case circuit breaker (MCCB)
leakage circuit breaker (ELB) (NF, NV type)
700 A
800 A
900 A
1000 A
1200 A
1500 A
2000 A
Frequency inverter
M
Frequency inverter
M
*2
or earth
Magnetic contactor (MC)
converter unit's input side
S-N600
S-N600
S-N800
1000 A rated product
1000 A rated product
1200 A rated product
1400 A rated product
WIRING
*3
on
17
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