Sumitomo SF-320 - Peripheral Equipment Notes; Motor Performance Notes

32
Peripheral equipment
Peripheral equipment
Common
32
STOP
／RESET
R
E
V
R
U
N
F
W
D
R
U
N
S
T
R
F
U
NM
O
N
R
E
M
T
R
E
A
D
C
O
P
Y
C
O
P
Y
R
U
N
P
R
G
P
O
W
E
R
A
L
A
R
M
1
2
3
0
Inverter
Remote operator
OS-41
Remote operator
Caution in selecting peripheral equipment
SF-320•HF-320 common option
Example connection
3
1
ICS–3
ICS–1
Cable length: L (m) Model
Mountingholes
2-M3 depth 5 (back)
●OS-41 ●ICS-1, 3
123
80
6.5 103
13 8
STOP／RESET
REV RUNFWD RUN
STRFUNMON
REMT READ
COPY
COPY
RUNPRG
POWER
ALARM
103
2
26.5
18
18
2ｰdia.4
L
1
2
3
0
Wiring and connection
Earth leakage breaker
Wiring distance
Phase-advanced capacitor
Wiring
between
inverter and
motor
Electromagnetic
contactor
Thermal
relay
(1) Be sure to connect the power supply to RST (input terminals) and the motor to U, V, W (output
terminals).
(2) Be sure to connect the grounding terminal. ( mark)
Inverters generate high frequency, increasing leakage current. Be sure to ground the inverter and
motor.
When using an electromagnetic contactor between the inverter and motor, do not turn the contactor ON or
OFF during inverter operation.
Install a thermal relay that matches the motor in the following cases:
* Install a thermal relay for each motor when operating more than one motor with one inverter.
* Set the current of the thermal relay at the rated motor current x 1.1. When the wiring length is long (more
than 10 m), the thermal relay may be activated too quickly. Install an AC reactor or current sensor on the
output side.
* When motors are to be operated with the rated current exceeding the adjustable level of the built-in
electronic thermal relay.
〈SF-320〉
* When operation continues at frequencies beyond the 30-60 Hz range.
Install an earth leakage breaker on the input side for protection of the inverter wiring and operators.
Conventional earth leakage breakers may malfunction because of high harmonics from the inverter;
therefore use an earth leakage breaker that is applicable to the inverter. The leakage current differs
according to the cable length. Refer to p.26.
The wiring distance between the inverter and operation panel should be less than 20 m. If it exceeds 20 m,
use a current/voltage converter, etc. Use shielded cable for wiring.
When the wiring distance between the motor and inverter is long, the leakage current from high harmonics
may cause the protective function of the inverter and peripheral equipment to be activated. The situation will
be improved by an AC reactor installed on the output side of the inverter.
Select appropriate cable to prevent voltage drop. (Large voltage drop lowers the torque.)
Do not use a phase-advanced capacitor.
When a power factor improving capacitor is connected between the inverter and motor, the capacitor may
be heated or broken by the higher harmonics in the inverter output.