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Peripheral Devices
1.10 Peripheral Devices
1.10.1 Peripheral device list
! FR-C520-0.1K to 3.7K
*1. Choose the NFB type that meets the power supply capacity.
*2. The sizes of the cables assume that the wiring length is 20m.
*3. The power factor may be slightly less.
*4. For installations in the United States or Canada, select the UL/cUL-listed breaker.
1.10.2 Leakage current and installation of earth (ground)
leakage circuit breaker
Due to static capacitances existing in the inverter I/O wiring and motor, leakage
currents flow through them. Since their values depend on the static capacitances,
carrier frequency, etc., take the following countermeasures.
(1) To-earth (ground) leakage currents
Leakage currents may flow not only into the inverter's own line but also into the
other line through the earth (ground) cable, etc. These leakage currents may
operate earth (ground) leakage circuit breakers and earth (ground) leakage
relays unnecessarily.
Selection of peripheral devices (Selection changes depending on
the power input specifications of the inverter.)
Motor
Output
(kW)
Inverter
Model
No-Fuse
Breaker (NFB
*1) or Earth
Leakage
Circuit
Breaker (ELB)
(*4)
Power Factor
Improving AC
Reactor
Power Factor
Improving DC
Reactor
Magnetic
Contactor
(MC)
Cables (mm
2
)
(*2)
R, S, T
U, V,
W
0.1
FR-C520-0.1K 30AF/5A
FR-BAL-0.4K
(*3)
FR-BEL-0.4K
(*3)
S-N10 2 2
0.2
FR-C520-0.2K 30AF/5A
FR-BAL-0.4K
(*3)
FR-BEL-0.4K
(*3)
S-N10 2 2
0.4
FR-C520-0.4K 30AF/5A FR-BAL-0.4K FR-BEL-0.4K S-N10 2 2
0.75
FR-C520-
0.75K
30AF/10A FR-BAL-0.75K FR-BEL-0.75K S-N10 2 2
1.5
FR-C520-1.5K 30AF/15A FR-BAL-1.5K FR-BEL-1.5K S-N10 2 2
2.2
FR-C520-2.2K 30AF/20A FR-BAL-2.2K FR-BEL-2.2K S-N10 2 2
3.7
FR-C520-3.7K 30AF/30A FR-BAL-3.7K FR-BEL-3.7K
S-N20,
S-N21
3.5 3.5
REMARKS
Secondary side measuring instruments
If the wiring length between the inverter and motor is long, the measuring instruments and CT
may generate heat due to line-to-line leakage currents. Therefore, select the devices that have
sufficient current ratings.