Inverter And Peripheral Devices - Mitsubishi Electric FR-B-750 to 75K Instruction Manual

1.2 Inverter and peripheral devices

Three-phase AC power supply
Use within the permissible power supply
specifications of the inverter.
(Refer to page 298)
Moulded case circuit breaker (MCCB) or
earth leakage current breaker (ELB),
fuse
The breaker must be selected carefully
since an in-rush current flows in the inverter
at power on.
(Refer to page 4)
Magnetic contactor (MC)
Install the magnetic contactor to ensure
safety. Do not use this magnetic contactor
to start and stop the inverter. Doing so will
cause the inverter life to be shorten.
(Refer to page 48)
Reactor (FR-HAL, FR-HEL option)
Reactors (option) must be used when power
harmonics measures are taken, the power factor is
to be improved or the inverter is installed near a
large power supply system (1000kVA or more).
The inverter may be damaged if you do not use
reactors. Select the reactor according to the model.
Remove the jumpers across terminals P/+ - P1
to connect the DC reactor
(Refer to page 48 )
AC reactor
(FR-HAL)
Noise filter
(FR-BLF)
The 55K or less has
a built-in common
mode core.
High power factor converter
(MT-HC*)
Power supply harmonics can
be greatly suppressed.
Install this as required.
* Compatible with the FR-B-75K or more.
CAUTION
· Do not install a power factor correction capacitor, surge suppressor or radio noise filter on the inverter output side. This will cause the
inverter to trip or the capacitor, and surge suppressor to be damaged. If any of the above devices are connected, immediately remove them.
· Electromagnetic wave interference
The input/output (main circuit) of the inverter includes high frequency components, which may interfere with the communication
devices (such as AM radios) used near the inverter. In this case, set the EMC filter valid to minimize interference.
(Refer to page 15.)
· Refer to the instruction manual of each option and peripheral devices for details of peripheral devices.
to the 55K or less.
P/+
DC reactor
(FR-HEL)
For the 75K or more, a
DC reactor is supplied.
Always install the reactor.
Power regeneration Brake unit
converter (MT-RC*) (FR-BU, MT-BU5*)
Resistor unit
Great braking capability is
(FR-BR, MT-BR5*)
obtained.
Install this as required.
The regenerative braking
capability of the inverter can
be exhibited fully.
Install this as required.
Inverter and peripheral devices
R/L1 S/L2 T/L3
U V W
P1 P/+ N/-
Earth
(Ground)
Devices connected to the output
Do not install a power factor correction capacitor,
surge suppressor or radio noise filter on the output
side of the inverter. When installing a moulded case
circuit breaker on the output side of the inverter,
contact each manufacturer for selection of the
moulded case circuit breaker.
Earth (Ground)
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.
Inverter (FR-B,B3)
The life of the inverter 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. (Refer to page 8)
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 14)
Refer to page 15 for the built-in EMC filter.
Noise filter
(FR-BSF01, FR-BLF)
Install a noise filter to reduce
the electromagnetic noise
generated from the inverter.
Effective in the range from
about 1MHz to 10MHz.
A wire should be wound 4T at
a maximum.
Motor
Earth (Ground)
1
3