Mitsubishi Electric FR-F740 EC Instruction Manual page 42

Inverter and peripheral devices
Selections for use of the Mitsubishi 4-pole standard motor with power supply voltage of
400V AC 50Hz.
Select the MCCB according to the inverter power supply capacity. Install one MCCB per
inverter.
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 stop during
motor driving, the electrical durability is 25 times.
If using an MC for emergency stop during motor driving, select an MC regarding the inverter
input side current as JEM1038-AC-3 class rated current. When using an MC on the inverter
output side for commercial-power supply operation switching using a general purpose motor,
select an MC regarding the motor rated current as JEM1038-AC-3 class rated current.
When the breaker on the inverter primary side trips, check for the wiring fault (short circuit),
damage to internal parts of the inverter, etc. Identify the cause of the trip, then remove the
cause and power on the breaker.
The supplied DC reactor has to be installed.
3 - 4
M
MCCB F700
3~
M
MCCB F700
3~
Fig. 3-2:
Installation of the breakers
Wiring
I001332E