Table of Contents
Advertisement
Selection of wiring devices
Applicable
Voltage
class
3 phase
400V
class
Note 5)
The recommended molded case circuit breaker (MCCB) must be connected to primary side of each inverter to
protect the wiring system.
Note 1: Be sure to attach a surge killer to the exciting coil of the relay and the magnetic contactor.
Note 2: When using the auxiliary contacts 2a of the magnetic contactor MC for the control circuit, connect the
Note 3: When a motor is driven by commercial power supply using commercial power supply / inverter switching
Note 4: Select an MCCB with a current breaking rating appropriate to the capacity of the power supply, because
Note 5: For the operation and control circuits, regulate the voltage at 200V to 240V with a step-down transformer
9
Note 6: Regarding influence of leakage current, refer to section 1.4.3.
Input current (A)
motor
Without
(kW)
With ACL
ACL
0.4
2.1
1.5
0.75
3.6
2.6
1.5
6.5
4.7
2.2
8.7
6.4
3.7
13.7
10.3
5.5
20.7
14.0
7.5
26.5
18.1
11
36.6
24.1
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 400V class.
Molded case circuit breaker (MCCB)
Earth leakage circuit breaker (ELCB)
Rated current (A)
Without ACL
With ACL
5
5
5
5
10
10
15
10
20
15
30
20
30
30
50
40
I-2
E6582233
Magnetic contactor
(MC) (Note 1 to 3)
Rated current (A)
Without ACL
With ACL
20
20
20
20
20
20
20
20
20
20
32
20
32
32
50
32
- Quick Links:
- Setting and Display Modes
Hide quick links:
Advertisement
Table of Contents
