Dc Bus Rails - Danfoss VLT FC Series Service Manual

D2h/D4h/D7h/D8h/J9 Unit Dis...

11.2.18 DC Bus Rails

To remove or reinstall the DC bus rails with brake option, use the following steps. Refer to Illustration 11.11.
11.2.18.1 Without Optional Brake
Disassembly
1. Remove the power card mounting plate. Refer to
chapter 11.2.3 Power Card Mounting Plate.
2. Remove the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
3. Remove the 2 screws (T40) at the top end of the
DC bus rails, 1 per bus rail.
4. From the lower end of the DC bus rails, remove 4
nuts (10 mm), 2 per bus rail.
1 DC(+) bus rail
2 Screw (T20)
3 IGBT output busbar
4 Snubber capacitor
5 Nut (8 mm)
Illustration 11.11 DC Bus Rails without Brake Option
MG94A502
Service Guide
Reassembly
Tighten hardware according to chapter 14.1 Fastener Torque
Ratings.
1.
2.
3.
4.
6 IGBT module
7 IGBT output busbar
8 Screw (T40)
9 Screw (T25)
10 DC(-) bus rail
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Secure 2 screws (T40) at the top end of the DC
bus rails, 1 per bus rail.
Fasten 4 nuts (10 mm) at the lower end of the DC
bus rails, 2 per bus rail.
Replace the power terminal mounting plate. Refer
to chapter 11.2.11 Power Terminal Mounting Plate.
Replace the power card mounting plate. Refer to
chapter 11.2.3 Power Card Mounting Plate.
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