Danfoss VLT AHF 005 Service Guide

13.2.16 Motor Busbar Assembly
To remove or reinstall the motor busbar assembly, use the
following steps. Refer to Illustration 13.15.
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. In E1h/E3h drives, remove the gate drive card
mounting plate. See chapter 13.2.13 Gate Drive
Card Mounting Plate.
3. Remove 12 nuts (13 mm), 2 from each end of the
3 motor busbars (starting with the left motor
busbar). Lift the 3 motor busbars from the drive.
4. Remove 3 nuts (13 mm), 1 from the upper end of
each current sensor busbar.
5. Remove 6 nuts (13 mm), 2 from the upper end of
each IGBT output busbar.
6. Remove 3 screws (T20), 1 from the middle of
each IGBT output busbar. This screw is not
present in E2h/E4h drives.
7. Lift the IGBT output busbars from the drive.
8. Remove 6 screws (T25), 2 from the middle of
each current sensor busbar.
9. Unplug 3 current sensor cables, 1 from the top of
each current sensor.
10. Unfasten 6 screws (T20), 2 from the base of each
current sensor.
11. Lift the 3 current sensor busbars with current
sensors from the drive.
NOTICE
ASSEMBLY NOTE
When reinstalling current sensors, point the arrow on
each current sensor downward. Failure to install the
current sensors correctly can cause equipment
malfunction.
Reassembly
Tighten fasteners according to chapter 14.1 Fastener Torque
Ratings.
1. Place each current sensor on a current sensor
busbar, and position the busbars in the drive.
Check that the arrows on the current sensors
point downward.
2. Secure 6 screws (T20), 2 in the base of each
current sensor.
3. Position the IGBT output busbars in the drive.
Secure 6 nuts (13 mm), 2 in the upper end of
each IGBT output busbar.
4. Secure 3 screws (T20), 1 in the middle of each
IGBT output busbar. This screw is not present in
E2h/E4h drives.
5. Fasten 3 nuts (13 mm), 1 in the upper end of
each current sensor busbar.
6. Secure 6 screws (T25), 2 in the middle of each
current sensor busbar.
7. Connect the 3 current sensor cables, 1 at the top
of each current sensor.
8. Position the motor busbars in the drive, starting
with the right busbar. Secure 12 nuts (13 mm), 4
in each motor busbar.
9. Reinstall the gate drive card mounting plate, if
removed. See chapter 13.2.13 Gate Drive Card
Mounting Plate.
10. Reinstall 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
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Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English