Basic Configuration; Control - Mitsubishi Electric FR-A500 Instruction Manual

1.2 Basic Configuration

1.2.1 Basic configuration
The following devices are required to operate the inverter. Proper peripheral devices must be selected and correct
connections made to ensure proper operation. Incorrect system configuration and connections can cause the
inverter to operate improperly, its life to be reduced considerably, and in the worst case, the inverter to be damaged.
Please handle the inverter properly in accordance with the information in each section as well as the precautions and
instructions of this manual. (For connections of the peripheral devices, refer to the corresponding manuals.)
(MCCB)
or
(ELB)
(MC)
AC reactor
(FR-BAL)
Earth
(Ground)
Earth
(Ground)
Name
Power supply
Earth leakage
circuit breaker
(ELB) or moulded
case circuit
breaker (MCCB)
Magnetic
contactor
Reactors
DC reactor Inverter
(FR-BEL)
Devices
connected to the
output
Earth (Ground)
3
OUTLINE
Description
Use the power supply within the permissible
power supply specifications of the inverter.
(Refer to page 216.)
The breaker should be selected with care
since a large inrush current flows in the
inverter at power on. (Refer to page 39.)
Install the magnetic contactor to ensure
safety. (Refer to page 41)
Do not use this magnetic contactor to start
and stop the inverter. Doing so will cause the
inverter life to be shorter.
(Refer to page 39.)
The reactors must be used when the power
factor is to be improved or the inverter is
installed near a large power supply system
(1000kVA or more and wiring distance within
10m (32.81 feet)). Make selection carefully.
• The life of the inverter is influenced by
ambient temperature. The
temperature should be as low as possible
within the permissible range.
This must be noted especially when the
inverter is installed in an enclosure.
(Refer to page 10.)
• Wrong wiring might lead to damage of the
inverter. The control signal lines must be
kept fully away from the main circuit to
protect them from noise. (Refer to page
12.)
• Do not install a power factor correction
capacitor, surge suppressor or radio noise
filter on the output side.
• When installing a moulded case circuit
breaker (MCCB) on the output side of the
inverter, contact each manufacturer for
selection of the moulded case circuit breaker.
To prevent an electric shock, always earth
(ground) the motor and inverter.
For reduction of induction noise from the
power line of the inverter, it is recommended
to wire the earth (ground) cable by returning
it to the earth (ground) terminal of the
inverter. (Refer to page 36.)
1
ambient