Toshiba VF-S15 Instruction Manual page 294
For 3-phase induction motors
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- Instruction manual (394 pages) ,
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Selection of wiring devices
Voltage
class
3 phase
240V
class
1 phase
240V
class
3 phase
500V
class
Note 6)
The recommended molded case circuit breaker (MCCB) must be connected to primary side of each inverter to
protect the wiring system.
Note 1: Selections for use the Toshiba 4-pole standard motor with power supply voltage of 200V/ 400 - 50Hz.
Note 2: Be sure to attach a surge absorber to the exciting coil of the relay and the magnetic contactor.
Note 3: When using the auxiliary contacts 2a of the magnetic contactor MC for the control circuit, connect the
Note 4: When a motor is driven by commercial power supply using commercial power supply / inverter switching
Note 5: Select an MCCB with a current breaking rating appropriate to the capacity of the power supply, because
Note 6: For the operation and control circuits, regulate the voltage at 200V to 240V with a step-down transformer
Note 7: In case of aul=2 setting, be sure to select the wiring device for 1 rating up motor.
Note 8: Regarding influence of leakage current, refer to section 1.4.3.
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Applicable
Input current (A)
motor
(kW)
Without
With DCL
DCL
0.4
3.6
1.8
0.75
6.3
3.4
1.5
11.1
6.5
2.2
14.9
9.2
4.0
23.8
15.9
5.5
35.6
21.5
7.5
46.1
28.9
11
63.1
41.5
15
82.1
55.7
18.5
89.1
70.0
0.2
3.4
2.0
0.4
5.9
4.0
0.75
10.0
7.6
1.5
17.8
14.6
2.2
24.0
20.1
3.0
24.0
23.6
0.4
2.1
0.9
0.75
3.6
1.8
1.5
6.4
3.4
2.2
8.8
4.8
4.0
13.7
8.3
5.5
20.7
11.2
7.5
26.6
15.1
11
36.6
21.7
15
47.7
29.0
18.5
52.7
36.3
contacts 2a in parallel to increase reliability.
circuit, use a magnetic contactor appropriated AC-3 class the motor rated current.
short-circuit currents vary greatly depending on the capacity of the power supply and the condition of the
wiring system. The MCCB, MC and ELCB in this table were selected, on the assumption that a power
supply with a normal capacity would be used.
for 500V class.
Molded case circuit breaker (MCCB)
Earth leakage circuit breaker (ELCB)
Rated current (A)
Without DCL
With DCL
5
5
10
5
15
10
20
15
30
20
50
30
60
40
100
60
125
75
125
100
5
5
10
5
15
10
30
20
30
30
30
30
5
5
5
5
10
5
15
10
20
15
30
15
40
20
50
30
60
40
75
50
J-3
E6581611
Magnetic contactor (MC)
Note 2) Note 3)
Rated current (A)
Without DCL
With DCL
20
20
20
20
20
20
20
20
32
20
50
32
60
32
80
50
100
60
100
80
20
20
20
20
20
20
32
20
32
32
32
32
20
20
20
20
20
20
20
20
20
20
32
20
32
20
50
32
60
32
60
50
10
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