Danfoss VLT AHF 005 Service Guide

13.2.26 Horizontal 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 horizontal brake
busbars, use the following steps.
Disassembly in E1h/E3h drives
For E1h/E3h drives, refer to Illustration 13.32.
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 the gate drive card mounting plate. See
chapter 13.2.13 Gate Drive Card Mounting Plate.
3. Remove the vertical brake busbars. Refer to
chapter 13.2.25 Vertical Brake Busbars.
4. Remove 4 screws (T40), 2 from each snubber
capacitor. Remove the capacitors from the drive.
5. Remove 2 thread-forming screws (T25) from the
bottom horizontal busbar. Lift the busbar from
the drive.
6. Remove the middle horizontal busbar by
removing:
6a 4 screws (T50).
6b 2 screws (T20).
7. Remove the top horizontal busbar by removing:
7a 2 screws (T20).
7b 2 nuts (13 mm) from the right end of
the busbar.
Reassembly
Tighten fasteners according to chapter 14.1 Fastener Torque
Ratings.
1. Position the top horizontal busbar in the drive.
Secure the following fasteners:
1a 2 screws (T20).
1b 2 nuts (13 mm) in the right end of the
busbar.
2. Position the middle horizontal busbar in the
drive. Secure the following fasteners:
2a 4 screws (T50).
2b 2 screws (T20).
3. Position the bottom horizontal busbar in the
drive. Secure 2 screws (T25) in the busbar.
4. Place the snubber capacitors in the drive. Secure
4 screws (T40), 2 in each snubber capacitor.
5. Replace the vertical brake busbars. Refer to
chapter 13.2.25 Vertical Brake Busbars.
6. Replace the gate drive card mounting plate. See
chapter 13.2.13 Gate Drive Card Mounting Plate.
7. Replace the input plate. Refer to
chapter 13.2.9 Input Plate with Busbars and
chapter 13.2.10 Split Input Plate with Options.
E1h–E4h Drive Disassembly a... Service Guide
MG94A502 Danfoss A/S © 02/2019 All rights reserved. 313
13 13

Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English