ABB PSTX370 Service Manual page 36

3.6.1 Change the SCR
DISMANTLE THE SOFTSTARTER
Remove main power cables and control
cables
Disconnect the main power cables and the control
cables as described in chapter 3.3.3, step 1-3.
Remove cover and PCBA
Dismantle the front cover, all cables and the PCBA
as described in chapter 3.4.1, step 1-5.
1. Remove PCBA bracket
3
1
Remove the PCBA bracket by lifting it upwards
from unit.
2. Remove flexible bars
1
Loosen (3x)
phase) to disconnect the flexible bars.
3. Remove bypass contactor
1
Loosen (4x)
contactor.
2
Loosen (3x)
bypass contactor.
3
Remove the bypass contactor (including cable)
by lifting it upwards from unit.
4. Remove middle phase bar and current
transformer
1
Loosen (1x)
the middle phase bar. Also remove sleeve and
washer.
2
Loosen (1x)
phase bar.
3
Slide the middle phase bar outwards from
current transformer until unattached; remove phase
bar and current transformer from unit.
Service PSTX210...370 | Service Manual |
36
Torx 30 M6x25 (one screw per
Torx 25 M3x8 from the bypass
Torx 30 M6x25 from the
Hexagon no. 8 M10x60 from
Torx 25 M5x18 from the middle
1SFC13105M0201
1
2
1
3
1
3
4
3
1
3.6.1_1
Tx 30
M6 x 25
3.6.1_2
2
Tx 25 Tx 30
M5 x 18
M6 x 25
3.6.1_3
1
Hex no. 8
Tx 25
M10 x 60
M5 x 18
2
3.6.1_4