Danfoss VLT FC Series, Руководство по обслуживанию

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11.2.16 SCR Input Busbars
To remove or reinstall the SCR input busbars, use the
following steps. Refer to
Illustration 11.10 .
Disassembly
1. Remove the inrush card. Refer to
chapter 11.2.15 Inrush Card .
2. Remove 2 screws (T20) from the middle of the
inrush card support bracket.
3. Remove 2 standoffs (16 mm) from the inrush card
support bracket.
4. Remove 3 standoffs (19 mm) connecting the
busbars to the SCR modules, 1 for each SCR input
busbar.
5. Remove the SCR input busbars from the unit.
NOTICE
PARTS ALIGNMENT
To align all components, hand-fasten the hardware and
then position the inrush card support bracket before
tightening.
Reassembly
Tighten hardware according to chapter 14.1 Fastener Torque
Ratings .
1. Position the SCR input busbars in the unit.
2. Fasten 3 standoffs (19 mm) connecting the
busbars to the SCR modules, 1 for each SCR input
busbar.
3. Fasten 2 standoffs (16 mm) in the inrush card
support bracket.
4. Secure 2 screws (T20) in the middle of the inrush
card support bracket.
5. Replace the inrush card. Refer to
chapter 11.2.15 Inrush Card .
11.2.17 SCRs
To remove or reinstall the SCRs, use the following steps.
Refer to
Illustration 11.10 .
Disassembly
1. Remove the SCR input busbars. Refer to
chapter 11.2.16 SCR Input Busbars .
2. Remove the DC(+) busbar by removing 3 screws
(T50), 1 from each SCR module.
3. Remove the DC(-) busbar by removing 1 screw
(T30) and 3 screws (T50), 1 from each SCR
module.
4. Disconnect the gate leads, 1 from each SCR
module.
5. Remove 1 screw (T30) from each of the 4 corners
of each SCR module.
Reassembly
For reassembly, use the SCR spare part instructions that
come with the parts kit. Tighten hardware according to
chapter 14.1 Fastener Torque Ratings .
D2h/D4h/D7h/D8h/J9 Unit Dis... Service Guide
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