Danfoss VLT FC Series Service Manual page 298

E1h–E4h Drive Disassembly a...
Disassembly in E2h/E4h drives
In E2h/E4h drives, the DC snubber capacitors are located
under the Y-shaped busbars. Refer to Illustration 13.19.
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 3 nuts (13 mm), 1 at the top of each
current sensor busbar.
3. Remove 6 nuts (13 mm), 2 at the top of each
IGBT output busbar. Remove the IGBT output
busbars from the drive.
4. Remove 12 nuts (40 mm), 4 each DC snubber
capacitor pair.
5. Remove the 3 DC snubber capacitor pairs from
the drive.
1
2
3
4
13 13
1 Y-shaped busbar
2 Nut (40 mm)
Illustration 13.19 DC Snubber Capacitors in E2h/E4h Drives
296
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VLT FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
Reassembly in E2h/E4h drives
Tighten fasteners according to chapter 14.1 Fastener Torque
Ratings.
1.
2.
3.
4.
5.
3
4
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Place the DC snubber capacitor pairs in the drive.
Secure 12 nuts (40 mm), 4 in each DC snubber
capacitor pair.
Position the IGBT output busbars in the drive.
Secure 6 nuts (13 mm), 2 at the top of each IGBT
output busbar.
Secure 3 nuts (13 mm), 1 at the top of each
current sensor 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.
DC snubber capacitor pair
DC bus plates
MG94A502