ABB PSTX210 - Page 36

36 Service PSTX210...370 | Service Manual | 1SFC13105M0201
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
1
Remove the PCBA bracket by lifting it upwards
from unit.
2. Remove flexible bars
1
Loosen (3x) Torx 30 M6x25 (one screw per
phase) to disconnect the flexible bars.
3. Remove bypass contactor
1
Loosen (4x) Torx 25 M3x8 from the bypass
contactor.
2
Loosen (3x) Torx 30 M6x25 from the
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) Hexagon no. 8 M10x60 from
the middle phase bar. Also remove sleeve and
washer.
2
Loosen (1x) Torx 25 M5x18 from the middle
phase bar.
3
Slide the middle phase bar outwards from
current transformer until unattached; remove phase
bar and current transformer from unit.
1
3.6.1_1
1
1
Tx 30
M6 x 25
2
3.6.1_2
Tx 30
M6 x 25
Tx 25
M5 x 18
3
3.6.1_3
1
2
3
Hex no. 8
M10 x 60
Tx 25
M5 x 18
4
3.6.1_4
1
2
3
3