Vertical Brake Busbars - Danfoss VLT FC Series Service Manual

E1h–E4h Drive Disassembly a...

13.2.25 Vertical Brake Busbars

E1h–E4h drives can include optional brake busbars. There are 3 horizontal brake busbars and 2 vertical brake busbars. The
brake busbars have a red insulated coating, which can be used to identify them. To remove or reinstall the vertical brake
busbars, use the following steps. Refer to Illustration 13.31.
Disassembly
1. Remove the input plate. Refer to
chapter 13.2.9 Input Plate with Busbars and
chapter 13.2.10 Split Input Plate with Options.
2. Remove 2 screws (T40) from the bottom end of
the R(-) vertical brake busbar.
3. Remove 2 screws (T40) from the top end of the
R(-) vertical brake busbar. Lift the R(-) busbar from
the drive.
4. Remove 2 screws (T40) from the bottom end of
the R(+) vertical brake busbar.
5. Remove 2 screws (T40) from the top end of the
R(+) vertical brake busbar.
6. Remove the right IGBT output busbar by
removing:
6a 1 screw (T25) from the middle of the
right IGBT output busbar (only in
E1h/E3h drives).
6b 1 nut (13 mm) from the top of the right
current sensor busbar.
6c 2 nuts (13 mm) from the top of the
right IGBT output busbar.
7. Remove 2 nuts (13 mm) from the middle of the
R(+) vertical brake busbar. Lift the busbar from
the drive.
MG94A502
Service Guide
Reassembly
Tighten fasteners according to chapter 14.1 Fastener Torque
Ratings.
1.
2.
3.
4.
5.
6.
7.
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Position the R(+) vertical brake busbar in the
drive. Secure 2 nuts (13 mm) in the middle of the
busbar.
Place the right IGBT output busbar in the drive.
Secure the following fasteners:
2a 2 nuts (13 mm) in the top of the IGBT
output busbar.
2b 1 nut (13 mm) in the top of the right
current sensor busbar.
2c 1 screw (T25) in the middle of the right
IGBT output busbar (only in E1h/E3h
drives).
Secure 2 screws (T40) in the top end of the R(+)
vertical brake busbar.
Secure 2 screws (T40) in the bottom end of the
R(+) vertical brake busbar.
Position the R(-) vertical brake busbar in the drive.
Secure 2 screws (T40) in the top end of the
busbar.
Fasten 2 screws (T40) in the bottom end of the
R(-) vertical brake busbar.
Replace the input plate. Refer to
chapter 13.2.9 Input Plate with Busbars and
chapter 13.2.10 Split Input Plate with Options.
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