Peripheral Devices - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Wiring
3.1.1

Peripheral devices

Check the motor capacity of the inverter you purchased. Appropriate peripheral devices must be
selected according to the capacity. Refer to the following list and prepare appropriate peripheral
devices:
Motor Output
[kW]
0.75
0.75
Tab. 3-1: Breakers and contactors
Select the MCCB according to the inverter power supply capacity. Install one MCCB per
inverter.
The places with "xx" refer to the breaking capacity in case of short circuit. The correct
selection must be done depending on the design of the power input wiring.
Magnetic contactor is selected based on the AC-1 class. The electrical durability of magnetic
contactor is 500,000 times. When the magnetic contactor is used for emergency stop during
motor driving, the electrical durability is 25 times.
When using the MC for emergency stop during motor driving or using on the motor side
during commercial-power supply operation, select the MC with class AC-3 rated current for
the motor rated current.
NOTES When the inverter capacity is larger than the motor capacity, select an MCCB and a mag-
netic contactor according to the inverter type and cable and reactor according to the motor
output.
When the breaker on the inverter primary side trips, check for the wiring fault (short circuit),
damage to internal parts of the inverter, etc. Identify the cause of the trip, then remove the
cause and power on the breaker.
FR-D700 SC EC
Applicable Inverter
Type
0.1 FR-D720S-008SC
0.2 FR-D720S-014SC
0.4 FR-D720S-025SC
FR-D720S-042SC
1.5 FR-D720S-070SC
2.2 FR-D720S-100SC
0.4 FR-D740-012SC
FR-D740-022SC
1.5 FR-D740-036SC
2.2 FR-D740-050SC
3.7 FR-D740-080SC
5.5 FR-D740-120SC
7.5 FR-D740-160SC
MCCB Inverter
MCCB Inverter
Breaker Selection
Reactor Connection
Without With
NF32 xx 3P 6 A
NF32 xx 3P 10 A NF32 xx 3P 6 A
NF32 xx 3P 16 A NF32 xx 3P 10 A
NF32 xx 3P 32 A NF32 xx 3P 16 A
NF32 xx 3P 40 A NF32 xx 3P 32 A
NF32 xx 3P 6 A
NF32 xx 3P 10 A
NF32 xx 3P 16 A NF32 xx 3P 10 A
NF63 xx 3P 20 A NF32 xx 3P 16 A
NF63 xx 3P 32 A NF63 xx 3P 20 A
NF63 xx 3P 32 A
Fig. 3-2:
Installation of the breakers
M
3~
M
3~
Inverter and peripheral devices
Input Side Magnetic
Contactor
Reactor Connection
Without With
S-N10
S-N20,S-N21 S-N10
S-N10
S-N20, S-N21 S-N11, S-N12
S-N20, S-N21 S-N20, S-N21
I001332E
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