09.02 Maintenance
Siemens AG 6SE7087-6AK85-1AA0
8-13
Rectifier/Regenerating Unit Operating instructions
8.2.5.2 Disassembling the thyristor blocks for size K
15
1
2
3
1
3
3
12
8
10
6
1116
13
7
7
5
2
5
5
14
GKGK GK
8
9
GK GK GK
15
1
4
9
14
4
5
6
7
13
10
Front thyristor block, level A (weight of a thyristor block, approx. 25 kg)
• Remove the 3 covers a by removing 7 M4 hexagon-head bolts s and 3 M4 nuts d.
• Remove the copper plate f by removing 6 M10 hexagon-head bolts g.
• Remove the copper plate h by removing 4 M10 hexagon-head bolts j.
• Unplug the gate and cathode cables k (G, K).
• Only on disassembling the central thyristor block, remove the two thermistors that are only located on the
central thyristor block by removing the screws
l (Torx drive T25).
• Loosen the two M10 hexagon-head screws ; and swing the thyristor block out forwards.
• Loosen M10 nut A and pull the thyristor block out upwards at an angle.
Rear thyristor block, level B (weight of a thyristor block, approx. 25 kg)
• Unplug gate and cathode cables (G, K) S.
• Remove 2 M10 hexagon-head screws D.
• Remove 2 M10 hexagon-head screws F.
• Remove 2 M10 hexagon-head screws G.
• Loosen M10 nut H , swing the thyristor block out forwards and pull the thyristor block out upwards at an
angle.
The thyristor blocks are installed in the reverse order.
AoteWell Automation Sales Team
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