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Note: Keep the high power factor converter’s terminals R1, S1 unconnected.
Wiring example for commercial
power supply-inverter switch-
over
• Complicated sequence circuit for commercial power supply-inverter
switch-over
The following example shows wiring for connection of a commercial
power supply. (FR-A500 series) When making connection, always
provide interlocks between magnetic contactors MC2 and MC3:
Power supply
NFB MC1
Reactor 1
(FR-HCL01)
R
S
T
R2
S2
T2
R2
S2
T2
MC
Resistor
External box
(FR-HCB)
MC1
MC2
R3
S3
T3
Filter capacitor
MC1
MC2
R3
S3
T3
R4
S4
T4
R4
S4
T4
Reactor 2
(FR-HCL02)
R
S
T
R1
S1
SE
N
RDY
RSO
Y1 or Y2
R
S
T
R1
S1
SD
X11
RES
X10
N
PP
U
V
W
Motor
High power factor
converter (FR-HC)
MC2
MC3
(Note)
Resistor
Inverter
(FR-A500 series)