Installation And Wiring - Mitsubishi Electric FR-A720-0.4K Instruction Manual

2 INSTALLATION AND WIRING

Three-phase AC power supply
Use within the permissible power supply
specifications of the inverter.
(Refer to page 171)
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 5)
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 shortened.
(Refer to page 45)
Reactor (FR-HAL, FR-HEL option)
Install reactors (FR-HAL, FR-HEL option) 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 (1000kVA or more). The inverter
may be damaged if you do not use a reactor.
Select a reactor according to the model.
Remove the jumpers across terminals P/+ - P1 to
connect the DC reactor to the 55K or lower.
(Refer to Chapter 2 of
AC reactor
(FR-HAL)
EMC filter
(ferrite core)
(FR-BLF)
The 55K or lower has
a built-in common
mode choke.
High power factor converter
(FR-HC *1 , MT-HC *2 )
Power supply harmonics can
be greatly suppressed.
Install this as required.
*1 Compatible with the 55K or lower.
*2 Compatible with the 75K or higher.
*3 Compatible with all capacities.
: Install these options as required.
CAUTION
· Do not install a power factor correction capacitor, surge suppressor or EMC filter (capacitor) 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 Chapter 2 of the Instruction Manual (Applied).)
· Refer to the instruction manual of each option and peripheral devices for details of peripheral devices.
the Instruction Manual (Applied)) )
DC reactor (FR-HEL)
For the 75K or higher, a
DC reactor is supplied.
Always install the reactor.
Brake unit
(FR-BU2
Power regeneration
Resistor unit
*1
common converter (FR-CV )
(FR-BR
Power regeneration
The regenerative braking
*2
converter (MT-RC )
capability of the inverter can
Great braking capability is obtained.
be exhibited fully.
Install this as required.
Install this as required.
(Refer to page 27)
USB connector
A personal computer and an inverter can
be connected with a USB (Ver1. 1) cable.
R/L1 S/L2 T/L3
U V
P/+ P1 P/+ N/-
Earth
(Ground)
*3 , FR-BU *1 , MT-BU5 *2 )
Devices connected to the output
PR
P/+
Do not install a power factor correction capacitor,
P/+
surge suppressor or EMC filter (capacitor) on the
PR 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)
*1 , MT-BR5 *2 )
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 earthing
cable by returning it to the earth (ground) terminal of
the inverter.
Inverter (FR-A700)
The life of the inverter is influenced by
surrounding air temperature.
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. (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 9)
Refer to page 10 for the built-in EMC filter.
High-duty brake resistor
(FR-ABR *4 )
Braking capability of the inverter built-
in brake can be improved. Remove
the jumper across terminal PR-PX
when connecting the high-duty brake
resistor. (7.5K or lower)
Always install a thermal relay when
using a brake resistor whose capacity
is 11K or higher.
(Refer to page 35 )
*4 Compatible with the 22K or lower.
P/+
PR
EMC filter (ferrite core)
(FR-BSF01, FR-BLF)
W
Install an EMC filter (ferrite
core) to reduce the
electromagnetic noise
generated from the inverter.
Effective in the range from
about 1MHz to 10MHz. A wire
should be wound four turns at
a maximum.
Motor
Earth (Ground)
The
2
3