1SFC13105M0201 | Service Manual | Service PSTX470...570 61
4.5.3 Change the Current transformers
1. Remove current transformers from bottom bar
holder
1
Slide the current transformers outwards from
phase bars until unattached. Dispose of expended
current transformers.
2. Place new current transformers on bottom
side bar holder
Make sure that the ratio value of the new current
transformer correspond to previously installed
current transformer. Verify the ratio according to
table 7 below.
Make sure cables of new current transformer gets
connected in accordance to previously made
markings.
1
Position the current transformers with cables
facing downwards. ABB logotypes shall appear
upside down facing the bar holders.
2
Mount the current transformers on the phase
bars.
3. Remove current transformer from top bar
holder
1
Loosen (2x) Torx 30 M6x16 from the
middle phase bar in order to pull out the phase bar
and remove the current transformer. Dispose of
expended current transformer.
4. Place new current transformer on top bar
holder
Make sure that the ratio value of the new current
transformer correspond to previously installed
current transformer. Verify the ratio according to
Table 7 below.
Make sure cable of new current transformer gets
connected in accordance to previously made
markings.
1
Position the current transformer with the cable
facing upwards and the ABB logotype facing
outwards from bar holder.
2
Place the current transformer on the bar holder
and mount the phase bar through the current
transformer. Fasten the phase bar to the bar holder
with (2x)
Torx 30 M6x16 (8Nm).
Table 7
Softstarter size Ratio Order code Type
PSTX470…570 570/0,2 1SFA899302R1570 PSCT-570
PSTX720…840 840/0,2 1SFA899302R1840 PSCT-840
PSTX1050…1250 1250/0,2 1SFA899302R2250 PSCT-1250
1
4.5.3_1
1
2
4.5.3_2
2
1
Tx 30
M6 x 16
3
4.5.3_3
1
Tx 30
M6 x 16
(8Nm)
4
4.5.3_4
1
2
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