Basic Configuration - Mitsubishi Electric FR-CV-7.5K Instruction Manual

Basic Configuration

1.2 Basic Configuration
1.2.1 Basic configuration
The following devices are required to operate the power regeneration common converter. 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 product 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.)
(ELB)
or
(NFB)
(MC)
Earth
(Ground)
Earth
(Ground)
Earth(Ground)
Note: If connected to the inverter, the power factor improving DC reactor (FR-BEL) does not produce an effect on
power factor improvement. In addition, do not use the power factor improving AC reactor (FR-BAL) since
using it may degrade the power regeneration function.
Power supply
Earth leakage
circuit breaker
(ELB) or no-fuse
breaker(NFB)
Magnetic
contactor
Dedicated Stand-alone
reactor (FR-CVL)
Installation of
dedicated
Earth(Ground)
stand-alone
Power regeneration reactor
common converter
Power
(FR-CV)
regeneration
common
converter
Inverter
Devices
connected to the
output
Earth(Ground)
Name
Use the power supply within the permissible power
supply specifications of the power regeneration
common converter.
(Refer to page 44.)
The breaker should be selected with care since a
large inrush current flows in the power regeneration
common converter at power on. (Refer to page 26.)
Install the magnetic contactor to ensure safety.
When installed, do not use it to start or stop the
inverter. It might reduce the power regeneration
common converter life.
(Refer to page 26.)
For power coordination, always install the
dedicated stand-alone reactor.
Incorrect wiring might lead to power regeneration
common converter damage. The control signal lines
should be kept away from the main circuit to protect
them from noise.
•Use the compatible inverter.
•The inverter life is influenced by ambient
temperature.The ambient 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 might lead to inverter damage.The
control signal lines should be kept away from the
main circuit to protect them from noise.
Do not connect a power capacitor, surge suppressor
or radio noise filter to the output side.
Note: Note that when an electromagnetic
contactor (MC) and a no-fuse breaker
(NFB) are installed, switching off the
inverter during operation, then on again
will cause a starting current to flow,
affecting the inverter and motor. When
installing a no-fuse breaker (NFB) on the
output side, contact the NFB manufacturer
for selection of no-fuse breaker.
To prevent an electric shock, always ground the
dedicated stand-alone reactor, power regeneration
common converter, motor and inverter.
The grounding cable provided for reduction of
induction noise from the power line of the inverter is
recommended to be wired by returning it to the
grounding terminal of the inverter.
4
Description