Danfoss VLT FC Series, Руководство по обслуживанию

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10.2.19 IGBTs
Disassembly in 240/400 V AC units
1. Remove the gate drive card. Refer to
chapter 10.2.17 Gate Drive Card .
2. Remove the SCR input busbars. Refer to
chapter 10.2.15 SCR Input Busbars .
3. Remove the balance/high frequency card. Refer to
chapter 10.2.12 Balance/High Frequency Card .
4. Remove the insulation sheet from the capacitor
bank.
5. Remove the cylinder busbar support bracket by
removing 3 screws (T30).
6. Remove 1 thread-forming screw (T25) from each
IGBT output busbar.
7. Remove the IGBT output busbar by removing 2
screws (T30), from each IGBT output busbar.
8. Disconnect the IGBT temperature cable from each
IGBT module.
9. Remove the gate leads, 1 from each IGBT module.
10. Remove the snubber capacitor from each IGBT
module by removing 2 screws (T30).
11. To remove the DC(-) plate:
11a Remove 3 screws (T20) next to the IGBT
modules.
11b Unfasten 1 standoff (8 mm) connecting
the plate to the negative terminal of
capacitor 3.
11c Remove the screws (T25) connecting the
plate to the negative terminals of
capacitors 4 and 5. The number of
screws varies based on drive size.
12. Remove the insulator sheet between the DC(-)
plate and the DC(+) and midplate.
13. To remove the DC(+) plate:
13a Remove 3 screws (T20).
13b Unfasten 1 standoff (8 mm) connecting
the plate to the positive terminal of
capacitor 2.
13c Remove the screws (T25) connecting the
plate to the positive terminals of
capacitors 1 and 6. The number of
screws varies based on drive size.
14. Remove the plastic IGBT support (not shown) by
removing 4 screws (T25).
15. Remove the IGBTs by removing 4 screws (T25)
from each IGBT.
Disassembly in 690 V AC units
1. Remove the gate drive card. Refer to
chapter 10.2.17 Gate Drive Card .
2. Remove the SCR input busbars. Refer to
chapter 10.2.15 SCR Input Busbars .
3. Remove the balance/high frequency card. Refer to
chapter 10.2.12 Balance/High Frequency Card .
4. Remove the insulation sheet from the capacitor
bank.
5. Remove the cylinder busbar support bracket by
removing 3 screws (T30).
6. Remove 1 thread-forming screw (T25) from each
IGBT output busbar.
7. Remove the IGBT output busbar by removing 2
screws (T30) from each IGBT output busbar.
8. Disconnect the IGBT temperature cable from each
IGBT module.
9. Remove the gate leads, 1 from each IGBT.
10. Remove the snubber capacitor from each IGBT
module by removing 2 screws (T30).
11. To remove the DC(-) plate:
11a Remove 3 screws (T20 thread-forming)
next to the IGBT modules.
11b Remove 1 standoff (8 mm) connecting
the plate to the negative terminal of
capacitor 1.
11c Remove 1 screw (T25) from the negative
terminal of capacitor 3.
11d Remove 1 round plastic alignment cap.
12. Remove the insulator sheet between the DC(-)
plate and the DC(+) plate.
13. To remove the DC(+) plate:
13a Remove 3 thread-forming screws (T20).
13b Remove 2 screws (T25) connecting the
plate to the positive terminals of
capacitors 5 and 6.
14. Remove the plastic IGBT support (not shown) by
removing 4 screws (T25).
15. Remove the IGBTs by removing 4 screws (T25)
from each.
Reassembly
For reassembly, use the replacement IGBT instructions.
D1h/D3h/D5h/D6h/J8 Drive Di...
VLT
®
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
154 Danfoss A/S © 02/2019 All rights reserved. MG94A502
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