-17-
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/R,L2/S,L3/T
Connects 3 phase power.(3 phase 230V input)
L1/L,L2/N
Main power supply input
Connects single phase power. (Single phase 230V input)
U, V, W
Drive output
Connects 3 phase motor.
P1, P(+)
DC reactor
Connects input power-factor correcting DC reactor
(optional).
P(+), N(-)
DC intermediate circuit
Connected to DC link circuit terminal
(for DC bus connection).
G
Drive ground
Ground terminal for drive chassis (case).
(1) Main power supply input terminals:
3-phase 230V – [L1/R, L2/S, L3/T]
Single-phase 230V – [L1/L, L2/N]
¬
Connect the main power supply input terminals to the
power supply via a molded case circuit breaker or ground
fault circuit breaker for circuit protection. A ground fault
circuit breaker which can also detect DC current is rec-
ommended. Phase-sequence matching is unnecessary.
-
It is recommended that a magnetic contactor is con-
nected to prevent any failure or accident from becoming
serious by disconnecting the drive from the power supply
when the drive protective function operates.
®
Do not turn on or off the main power supply to start or
stop the drive; instead, use the control circuit terminal
FWD/REV or the RUN/STOP keys on the keypad panel.
If it is unavoidable to turn the main power supply on or off
to start or stop the drive, it must not exceed once per hour.
(2) Drive output terminals [U, V, W]
¬
Connect these terminals to the 3-phase motor in the correct phase-sequence. If motor rotation
direction is incorrect, exchange any two of the U, V, and W phases.
-
Do not connect a phase-advance capacitor or surge absorber to the drive output.
®
Excessive wiring length between the drive and the motor causes a high frequency current
to flow due to floating capacity between cables, making the drive trip, increasing the leak-
age current and deteriorating the accuracy in the current display. To prevent this, the wiring
distance to the motor should not exceed 165 feet (50 m). When the drive is operated in the
low noise mode (carrier frequency: 8 to 15 kHz) and the wiring distance is long, add an op-
tional output circuit filter.
Figure 2-3-1 Arrangement of
main circuit and ground termi-
nals
P(+)
P1
L3/T
L2/S
G
G
L1/R
W
V
U
N(-)
P(+)
VM10
For 3 phase 230V input
For single phase 230V input
P(+)
P1
L2/N
G
L1/L
