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Wiring of the Power Supply and Motor
1.5 Wiring of the Power Supply and Motor
1.5.1 Description of the main circuit terminals
1.5.2 Layout and wiring of the main circuit terminals
1.5.3 Cables, wiring lengths, crimping terminals, etc.
The following selection example assumes the wiring length of 20m.
1) FR-C520-0.1K to 3.7K
Symbol Terminal Name Description
R/L1, S/L2, T/L3 Power input
Connect to the commercial power supply.
U, V, W Inverter output
Connect a three-phase squirrel-cage motor.
N/- DC voltage common
DC voltage common terminal. Not isolated from the
power supply and inverter output.
P/+, P1
Power factor
improving DC
reactor connection
Disconnect the jumper from terminals P-P1 and
connect the optional power factor improving DC
reactor (FR-BEL).
Earth (Ground)
For earthing (grounding) the inverter chassis. Must
be earthed (grounded).
!
FR-C520-0.1K, 0.2K, 0.4K, 0.75K
!
FR-C520-1.5K, 2.2K, 3.7K
CAUTION
•Always connect the power supply cables to R/L1, S/L2 and T/L3. Never
connect them to U, V and W since it will damage the inverter. (The phase
sequence need not be matched.)
•Connect the motor to U, V and W. When the forward rotation switch (signal) is
turned on at this time, the motor rotates in the counterclockwise direction as
viewed from the load shaft.
Applicable
Inverter Type
Terminal
Screw
Size
Tightening
Torque
N•m
Crimping
Terminals
Cables
PVC
Insulated
Cables
mm
2
AWG
mm
2
R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W R, S, T U, V, W
FR-C520-
0.1K to
0.75K
M3.5 1.2 2-3.5 2-3.5 2 2 14 14 2.5 2.5
FR-C520-
1.5K, 2.2K
M4 1.5 2-4 2-4 2 2 14 14 2.5 2.5
FRC520-3.7K M4 1.5 5.5-4 5.5-4 3.5 3.5 12 12 4 2.5
N/- P/+
P1
U V W
IM
R/L1 S/L2 T/L3
Jumper
Power supply
Motor
N/-
P/+
P1
R/L1 S/L2 T/L3
U V W
IM
Jumper
Power supply
Motor