Toshiba TOSVERT VF-AS3 Instruction Manual page 42

Wiring devices for ND rating
Voltage
class
3-phase
480 V

• Install a surge absorber on the exciting coil of a magnetic contactor (MC) and relays.
• When using an auxiliary contacts 2a type magnetic contactor (MC), use the 2a contacts in parallel to
increase the liability of the contacts.
• Selection is for assuming a normal power supply capacity and using a Toshiba 4-pole standard motor
with input power 200 V/400 V-50 Hz.
• For the influence of the leakage current, refer to [2. 4. 3] of instruction manual (E6582062).
4. 2. 2
For protection of the wiring system, install a molded-case circuit breaker (MCCB) between the power
supply and the inverter (primary side).
An earth leakage circuit breaker (ELCB) that is equipped with a function to shut off by detecting leakage
current can be also installed. However, be cautious that an ELCB may operate improperly, because the
leakage current becomes large due to the influence of a wiring method, a built-in noise filter, etc.
Because the short-circuit current is different with power supply capacity and wiring system conditions,
select MCCB or ELCB depending on the inverter type and input current in the table [4. 2. 1].
Memo
4. Selection and installation of peripheral devices
Applicable
Inverter type-form
motor (kW)
0.75 VFAS3- 4004PCE
1.5 4007PCE
2.2 4015PCE
4.0 4022PCE
5.5 4037PCE
7.5 4055PCE
11 4075PCE
15 4110PCE
18.5 4150PCE
22 4185PCE
30 4220PCE
37 4300PCE
45 4370PCE
55 4450PCE
75 4550PCE
90 4750PCE
Installation of a molded-case circuit breaker (MCCB)
and earth leakage circuit breaker (ELCB)
• When complying with UL Standard and CSA Standard, a fuse needs to be installed on the
primary side of the inverter. For details, refer to [3. 2. 3].
Molded-case circuit
Input current (A)
breaker (MCCB)
Earth leakage circuit
breaker (ELCB)
1.6 3
3.1 5
4.5 10
8.0 10
10.8 15
14.4 20
20.8 30
28.3 40
34.9 50
41.4 50
55.9 75
69.0 100
83.4 125
101.9 125
138.0 175
165.1 200
4-4
E6582162c
Rated current (A)
Magnetic contactor
(MC)
20
20
20
20
20
20
32
32
50
50
60
80
100
135
200
260