Standard Dc Capacitors - Danfoss VLT FC Series Service Manual

D1h/D3h/D5h/D6h/J8 Drive Di...

10.2.20 Standard DC Capacitors

To remove or reinstall the standard DC capacitors, use the
following steps.
NOTICE
CAPACITOR REPLACEMENT
When replacing DC capacitors, always replace the entire
bank of capacitors, even if only 1 DC capacitor has failed.
NOTICE
CAPACITOR TYPE
Drives can contain standard DC capacitors or twistlock
capacitors. Use the standard DC capacitor instructions for
drives manufactured prior to the following time period:
•
240/400 V AC units produced before week 18,
2018.
•
690 V AC units produced before week 23, 2018.
For excluded drives, see chapter 10.2.22 Twistlock DC
Capacitors.
10 10
156
®
VLT FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
Disassembly in 240/400 V AC units
To remove or reinstall the standard DC capacitors, use the
following steps. The number of fasteners may vary based
on the drive size. Refer to Illustration 10.13.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
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Remove the gate drive card. Refer to
chapter 10.2.17 Gate Drive Card
Remove the balance/high frequency card. Refer to
chapter 10.2.12 Balance/High Frequency Card.
Remove insulator sheet 1.
Remove 3 screws (T30) from the cylinder busbar
support bracket, and remove the bracket from
the drive.
Remove 3 thread-forming screws (T25), 1 from
the top of each IGBT output busbar.
Remove 6 screws (T30), 2 from the top of each
IGBT output busbar. Remove the busbars from
the drive.
Remove 6 screws (T30), 2 from each snubber
capacitor. Remove the 3 snubber capacitors from
the drive.
To remove the DC(-) plate:
8a Remove 3 thread-forming screws (T20).
8b Remove 1 standoff (8 mm). For reinstal-
lation, mark the standoff locations on
the plates with a felt-tip marker.
8c Remove 2 screws (T25). Number of
screws may vary based on drive size.
Remove insulator sheet 2.
To remove the DC(+) plate:
10a Remove 3 thread-forming screws (T20).
10b Remove 1 standoff (8 mm), and mark
the location.
10c Remove 2 screws (T25). Number of
screws may vary based on drive size.
To remove the midplate:
11a Remove 1 standoff (8 mm), and mark
the location.
11b Remove the screws (T25) from the
remaining capacitors.
Remove the capacitor locking panel by removing
12 thread-forming screws (T25).
Lift the standard DC capacitors from the capacitor
bank housing.
MG94A502