Danfoss VLT FC Series, Руководство по обслуживанию

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10.2.15 SCR Input Busbars
To remove or reinstall the SCR busbars, use the following
steps. Refer to
Illustration 10.10 .
Disassembly
1. Remove the inrush card. Refer to
chapter 10.2.14 Inrush Card .
2. Remove 3 standoffs (11 mm), 1 from each SCR
input busbar.
3. Remove 2 screws (T25) from the black plastic
inrush support.
4. Remove 3 screws (T30) connecting the busbars to
the SCR modules, 1 from each busbar.
5. Remove the SCR input busbars.
NOTICE
COMPONENT ALIGNMENT
Fasten all components hand-tight, and then place the
inrush support enclosure to align components before
tightening.
Reassembly
Tighten hardware according to chapter 14.1 Fastener Torque
Ratings .
1. Position the SCR input busbars in the drive.
2. Fasten 3 screws (T30) connecting the busbars to
the SCR modules, 1 in each busbar.
3. Fasten 2 screws (T25) in the black plastic inrush
support.
4. Secure 3 standoffs (11 mm), 1 in each SCR input
busbar.
5. Replace the inrush card. Refer to
chapter 10.2.14 Inrush Card .
10.2.16 SCRs
To remove or reinstall the SCR modules, use the following
steps. Refer to
Illustration 10.10 .
Disassembly
1. Remove the SCR input busbars. Refer to
chapter 10.2.15 SCR Input Busbars .
2. Remove the DC(+) busbar SCR to DC coil by first
removing 1 screw (T30) that attaches the busbar
to the DC inductor.
3. Remove 1 screw (T30) from each SCR module.
4. Remove the insulator sheet.
5. Remove the DC(-) busbar SCR to DC coil by first
removing 1 screw (T30).
6. Disconnect the gate leads, 1 from each SCR
module.
7. Remove 2 screws (T30) from each SCR module.
Reassembly
For reassembly, refer to the SCR replacement instructions
that come with the spare parts kit.
D1h/D3h/D5h/D6h/J8 Drive Di...
VLT
®
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
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