12-pulse supply connection eliminates the fifth and seventh harmonics, which remarkably
reduces the harmonic distortion of the line current and the conducted emissions. 12-pulse
connection requires a three-winding transformer, or two separate transformers. There is a
30-degree phase shift between the two 6-pulse supply lines, which are connected to different
supply modules through electrically separate switching equipment.
6-pulse connection
18 Operation principle and hardware description
1. Supply transformer
2. Switching equipment and fuses
3 Fuses for protecting input cabling
4. AC fuses for protecting supply unit against short circuit
5. Diode supply modules
1
3 4
1
3
5
12-pulse connection
2
2
4
5
CS880-304LC A019 ACS880-307LC A019_6p 12p_conn diagr.pd
Tehkää 2 kuvaa, erikseen 6-pulse
a 12-pulse connection ilman ko
tekstiä;
Kuvan yläpuolelle txt:
The diagram shows a 6-pulse
connection.
The diagram shows a 12-pulse
connection.
Kummankin kuvan alle sama
taulukko.
12-pulse connection
18 Operation principle and hardware description
1. Supply transformer
2. Switching equipment and fuses
3 Fuses for protecting input cabling
4. AC fuses for protecting supply unit against short circuit
5. Diode supply modules
1
3 4
6-pulse connection
1
5
3
2
2
4
5
CS880-304LC A019 ACS880-307LC A019_6p 12p_conn diagr.pd
Tehkää 2 kuvaa, erikseen 6-pulse
a 12-pulse connection ilman ko
tekstiä;
Kuvan yläpuolelle txt:
The diagram shows a 6-pulse
connection.
The diagram shows a 12-pulse
connection.
Kummankin kuvan alle sama
taulukko.
Supply transformer1.
Switching equipment and fuses2.
Fuses for protecting input cabling3
AC fuses for protecting supply unit against short circuit4.
Diode supply modules5.
Operation principle and hardware description 33
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