ABB ACQ80-04 Series, Hardware Manual, Page: 68 / 170

2. Open the front cover, if not already opened. For R0...R2, see Connection procedure:
frames R0…R2 (page 72) and for R3 see section Connection procedure, frames
R3...R4 (page 76) .
3. To disconnect the internal EMC filter, remove the EMC grounding screw.
4. To disconnect the ground-to-phase varistor, remove the varistor grounding screw.
3
4
￭ Frames R4…R8
To disconnect the internal EMC filter or ground-to-phase varistor, if needed, do as follows:
1. Switch off the power from the drive.
2. Open the cover, if not already opened. For frames R4, see section Connection procedure,
frames R3...R4 (page 76) . For frames R5…R8, see section Connection procedure,
frames R5…R8 (page 80) .
3. To disconnect the internal EMC filter, remove the two EMC screws.
4. To disconnect the ground-to-phase varistor, remove the varistor screw.
R4
68 Electrical installation