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1.2 Basic Configuration
OUTLINE
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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.)
Name Description
Power supply
Use the power supply within the permissible
power supply specifications of the inverter.
(Refer to page 184.)
Earth leakage
circuit breaker
(ELB) or no-fuse
breaker (NFB)
The breaker should be selected with care
since a large inrush current flows in the
inverter at power on. (Refer to page 37.)
Magnetic
contactor
The magnetic contactor need not be
provided. When installed, do not use it to
start or stop the inverter. It might reduce the
inverter life.
(Refer to page 37.)
Reactors
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 (32.81feet)). Make selection
carefully.
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.
(Refer to page 7.)
•
Incorrect wiring might lead to inverter
damage. The control signal lines should
be kept away from the main circuit to
protect them from noise.
(Refer to page 9.)
Devices
connected to the
output
Do not connect a power capacitor, surge
suppressor or radio noise filter to the output
side.
(MC)
Ground
DC reactor
(FR-BEL)
Ground
(NFB)
or
(ELB)
A
C reactor
(FR-BAL)
Ground
To prevent an electric shock, always ground
the motor and inverter.
The ground wiring from the power line of the
inverter as an induction noise reduction
technique is recommended to be run by
returning it to the ground terminal of the
inverter. (Refer to page 35)
Japanese Harmonic Suppression Guideline
The “harmonic suppression guideline for household appliances and general-purpose prod*ucts” was
issued by Ministry of Economy, Trade and Industry (formerly Ministry of International Trade and Industry)
in September, 1994. This guideline applies to the FR-F520-0.75K to 3.7K. By connection of the power
factor improving reactor (FR-BEL or FR-BAL), this product conforms to the “harmonic suppression
technique for transistorized inverters (input current 20A or less)” set forth by the Japan Electrical
Manufactures
′
Association.
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