• To prevent an electric shock, always earth (ground) the motor, the inverter, and the converter unit.
• Do not install a power factor correction capacitor, surge suppressor, or capacitor type filter on the inverter's output side. Doing
so will cause the inverter shut off or damage the capacitor or surge suppressor. If any of the above devices is connected,
immediately remove it. When installing a molded case circuit breaker on the output side of the inverter, contact the
manufacturer of the molded case circuit breaker.
• Electromagnetic wave interference:
The input/output (main circuit) of the inverter or the converter unit includes high frequency components, which may interfere
with the communication devices (such as AM radios) used near the inverter or the converter unit. In this case, activating the
EMC filter of the converter unit may minimize interference. (Refer to
• For details of options and peripheral devices, refer to the respective Instruction Manual.
• A PM motor cannot be driven by the commercial power supply.
• A PM motor is a motor with permanent magnets embedded inside. High voltage is generated at the motor terminals while the
motor is running. Before closing the contactor at the output side, make sure that the inverter power is ON and the motor is
Converter unit (FR-CC2)
Three-phase AC power supply
Molded case circuit breaker (MCCB), earth
leakage circuit breaker (ELB), or fuse
Magnetic contactor (MC)
AC reactor (FR-HAL)
High power factor converter (FR-HC2)
Brake unit (FR-BU2)
Resistor unit (MT-BR5)
Example) No-fuse switch (DSN type)
The life of the inverter and the converter unit is influenced by the
surrounding air temperature.
The surrounding air temperature should be as low as possible within the
permissible range. This must be noted especially when the inverter is
installed in an enclosure.
Incorrect wiring may lead to damage of the inverter and the converter unit.
The control signal lines must be kept fully away from the main circuit lines
to protect them from noise.
The built-in EMC filter of the converter unit can reduce the noise.
Must be within the permissible power supply specifications of the converter
Must be selected carefully since an inrush current flows in the converter unit
at power ON.
Install this to ensure safety.
Do not use this to start and stop the inverter. Doing so will shorten the life
of the inverter and the converter unit.
Install this to suppress harmonics and to improve the power factor.
An AC reactor (FR-HAL) (option) is required when installing the inverter
near a large power supply system (1000 kVA or more). Under such
condition, the inverter and the converter unit may be damaged if you do not
use a reactor.
Select a reactor according to the applied motor capacity.
Suppresses the noise radiated from the power supply side of the converter
Suppresses the power supply harmonics significantly. Install this as
When FR-HC2 is used, FR-CC2 is not required.
Allows the inverter to provide the optimal regenerative braking capability.
Install this as required.
Connect between the inverter and a personal computer with a USB (ver.
Use a USB memory device to copy parameter settings or use the trace
Install this to reduce the electromagnetic noise generated from the inverter
and the converter unit. The noise filter is effective in the range from about
0.5 to 5 MHz.
Connect a squirrel-cage induction motor.
Connect this for an application where a PM motor is driven by the load even
while the inverter power is OFF. Do not open or close the contactor while
the inverter is running (outputting).
A PM motor can be used. A PM motor cannot be driven by the commercial
2. INSTALLATION AND WIRING
2.1 Peripheral devices