Maintenance 09.02
8-12 Siemens AG 6SE7087-6AK85-1AA0
Rectifier/Regenerating Unit Operating Instructions
8.2.5 Replacing thyristor blocks
8.2.5.1 Disassembling the thyristor blocks for size H
G
K
G
K
G
K
G
K
G
K
G
K
12
13
3
2
2
4
7
8
5
5
13
7
12
8
7
8
6
1
14 11
12
2
2
1
13 8
G
K
7
G
K
7
G
K
12
G
K
12
G
K
12
13 8
13 13
8 8
9 9 9
9
10
10
Front thyristor block, level A (weight of a thyristor block, approx. 9.5 kg)
• Swing out the two doors a by removing two M4 slit Torx screws s in each case.
• Detach cable d from the modules and the screen fixture.
• Remove 2 M6 hexagon-head bolts f and swing out electronics box as far as the stop.
• Only on disassembling the central thyristor block, open 4 twisted cables g and detach cable h for the two
thermistors that are only located on the central thyristor block.
• Unplug the gate and cathode cables (G, K) j.
• Remove 3 M8 hexagon-head bolts k
• Loosen the two M8 hexagon-head screws l, push rail ; approx. 150 mm upwards and swing the thyristor
block out forwards.
• Loosen M6 nut A and pull the thyristor block out upwards at an angle.
Rear thyristor block, level B (weight of a thyristor block, approx. 9.5 kg)
• Unplug the gate and cathode cables(G, K) S .
• Remove 3 M8 hexagon-head bolts D .
• Loosen M6 nut F and pull the thyristor block out upwards at an angle.
The thyristor blocks are installed in the reverse order.
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