ABB PST30 Manual page 5

16. Mount the new HV-Board with the five
screws.
17. Mount the cables from the thermal switch
and current transformers on the LV-Board.
Be careful how you connect the cables
from the current transformers (correct
phase sequence).
18. Mount the cables from the thyristors and
fans on the HV-Board. Be careful how you
connect the cables from the thyristors.
19. For upgrade to Torque Control it is
important to check the connection on the
current transformer (see fig below).
20. If the two cables on each current
transformer are black use a multimeter to
detect the right connection. The resistance
of the current transformer are between
0,2-6 ohm.
21. Change the position of the cables on the
current transformers to obtain correct
position if necessary.
White side
Black cable
White side
Black cable
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PST
Black side
White cable
PSTB
Black side
White cable