2-4
2 Installation and Connection
FVR-C11S-EN
2
2-3-2 Connecting the main circuit and ground terminals
Table 2-3-1
Functions of main circuit and ground terminals
Symbol
Name
Explanation
L1/L,L2/N
Main power supply input
Connects single-phase power
(Single-phase 200V input).
U, V, W
Inverter output
Connects 3-phase motor.
P1, P(+)
For connection of DC
reactor
Connects input power- factor correcting DC reactor
(optional).
P(+), N(-)
For DC intermediate
circuit
Connected to DC link circuit terminal
(for DC bus connection).
G
For inverter grounding
Ground terminal for inverter chassis (case).
1) Main power supply input terminal
Single-phase 200V [L1/L,L2/N]
Figure 2-3-1 Arrangement of main circuit and ground
terminals
1. Connect the main power supply input ter-
minals to the power supply via a molded
case circuit breaker for circuit protection or
earth leakage circuit breaker. An earth-
leakage circuit breaker which can also de-
tect DC current is recommended. Phase-
sequence matching is unnecessary.
2. It is recommended that a magnetic contac-
tor is connected to prevent any failure or
accident from becoming serious by discon-
necting the inverter from the power supply
when the inverter protective function oper-
ates.
3. Do not turn on or off the main power supply
to start or stop the inverter; instead, use the
control circuit terminal FWD/REV or the
RUN/STOP key on the keypad panel. If it
is unavoidable to turn the main power sup-
ply on or off to start or stop the inverter, it
must not exceed once per hour.
2) Inverter output terminal [U, V, W]
1. Connect these terminals to the 3-phase
motor with the correct phase-sequence. If
a motor rotation direction does not corre-
spond to the correct rotation direction, ex-
change any two of the U, V, and W phases.
2. Do not connect a phase-advance capaci-
tor or surge absorber to the inverter output.
3. A very long wiring length between the in-
verter and the motor causes a high fre-
quency current to flow due to floating
capacity between cables, making the in-
verter trip, increasing the leakage current
and deteriorating the accuracy in the cur-
rent display. To prevent such trouble, the
wiring length to the motor should not ex-
ceed 50 meters.
When the inverter is operated in the low
noise mode (carrier frequency: 8 to 15
kHz) and the wiring length is long, add an
optional output circuit filter (OFL filter).
G
W
V
U
N(-)
P(+)
FVR-C11S-7EN
P(+)
P1
L2/N
G L1/L
For single-phase 200V input
