ABB ACS800-67LC, Руководство по оборудованию

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Planning the electrical installation 61
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Alternative 3: Single core cables with concentric protective shields
When single core cables equipped with concentric protective shields (metal) are used, the
phase current will induce voltage to the cable shield. If the shields are connected to each
other at both ends of the cable, current will flow in the cable shield. In order to prevent this
and to ensure personal safety, the cable shield must be connected only to PE at the
transformer side and insulated on the converter side. The connection is represented
below.
Selecting the rotor cabling principle
Only use three-phase symmetrical cables between the converter and the rotor. For the
possible rotor cable shield constructions, see section
Rotor cable shield on page 57 .
Rotor cable connections with parallel symmetrical cables are shown below.
For information on how to change the rotation direction of the generator, see ACS800-
67LC system description and start-up guide [3AUA0000059432 (English)].
L1
L2
L3
N
Transformer Converter
L1
L2
L3
PE
PE
Wind turbine main earthing busbar
Concentric shield
U2
PE
Rotor-side converter
PE
K
L
M
G
3 ~
V2 W2
Output
1 2 3 1 2 3 1 2 3
1 2 3 1 2 3 1 2 3