Operating instructions

Operation with up to three supply inverters
MICROMASTER 420 / 440 – DC link coupling between several
Frequency inverters
Note: The cylindrical fuse disconnectors may only be switched when in
a no-current condition.
Power
Rated input
current
Rated
output
current
Rated DC
link current
Power
Rated input
current
Rated
output
current
Rated DC
link current
kW A A A Order No. A kW A A A Order No. A
0.37
1.1 1.3 1.6 3NC1402 2 - - - - - -
0.5
5
1.4 1.7 2.0 3NC1404 4 - - - - - -
0.7
5
1.9 2.2 2.6 3NC1405 5 - - - - - -
1.1 2.8 3.1 3.7 3NC1405 5 - - - - - -
1.
5
3.9 4.1 4.9 3NC1406 6 - - - - - -
2.2
5.0 5.9 7.1 3NC1410 10 - - - - - -
3
6.7 7.7 9.2 3NC1415 15 - - - - - -
4
8.5 10.2 12.2 3NC1415 15 - - - - - -
5.
5
11.6 13.2 15.8 3NC1420 20 7.
5
16.0 19.0 22.8 3NC1430 30
7.
5
15.4 19.0 22.8 3NC1430 30
11
22.5 26.0 31.2 3NC1440 40
11
22.5 26.0 31.2 3NC1440 40
1
5
30.5 32.0 38.4 3NC1450 50
1
5
30.0 32.0 38.4 3NC1450 50
18.
5
37.2 38.0 45.6 3NE8018-1 63
18.
5
36.6 38.0 45.6 3NE8018-1 63 22 43.3 45.0 54.0 3NE8020-1 80
22
43.1 45.0 54.0 3NE8020-1 80
30
59.3 62.0 74.4 3NE8021-1 100
30
58.7 62.0 74.4 3NE8021-1 100
37
71.7 75.0 90.0 3NE8021-1 100
37
71.2 75.0 90.0 3NE8021-1 100
4
5
86.6 90.0 108.0 3NE8022-1 125
4
5
85.6 90.0 108.0 3NE8022-1 125
5
5
103.6 110.0 132.0 3NE8024-1 160
5
5
103.6 110.0 132.0 3NE8024-1 160 7
5
138.5 145.0 174.0 2x3NE8021-1 2x100
7
5
138.5 145.0 174.0 2x3NE8021-1 2x100
90
168.5 178.0 213.6 2x3NE8022-1 2x125
Line supply voltage, 3-ph. 380V to 480V
Required DC link fuses
2x per converter are
required
Required DC link fuses
2x per converter are
required
Rated currents and recommended DC link fuses for MICROMASTER 420/440 inverters, versions with/without
filter
CT (Constant Torque) VT (Variable Torque)
Table 3-2: Rated currents and required DC link fuses of the MICROMASTER420 and
MICROMASTER440 frequency inverters with a line supply voltage 3-ph. 380-480V AC.
Copyright © Siemens AG 2005 All rights reserved
Possible fuse disconnectors:
for fuse 3NC14.. : 3NC1492
for fuse 3NE80.. : 3NP40...
Note:
The fused disconnectors may only be switched when in a no-
current condition. Used in compliance with degree of pollution 2.
A&D SD Page 26/32