ABB ACH550-01+B055+F278 Installation Supplement Manual page 4

Power cable installation procedure
1. Remove the front cover as shown in the user's
manual.
2. Undo the two fastening screws of the switch
assembly plate.
3. Turn the switch assembly plate aside.
4. Remove the rubber grommets and cut adequate
holes into them. Slide the grommets onto the power
cables the conical part downwards. Seal the lead-
through plate holes with the grommets.
5. Strip off the outer sheathing of the cables under the
360 degrees grounding clamps and fasten the
clamps onto the stripped parts of the cables.
6. Twist the shields of the cables into pigtails and
connect the pig tails under the grounding screws
with cable lugs. Keep the pigtails short to minimize
electromagnetic emission.
7. Connect the motor cable conductors to the U2, V2
and W2 terminals.
8. Turn the switch assembly plate back to its original
position and fasten the two fastening screws.
9. Connect the input cable conductors to the main
switch terminals U1, V1 and W1.
10. Connect wires to the auxiliary contact (if used).
11. Connect the control cables as shown in the user's
manual.
12. Replace the front cover.
Frame
size
U1, V1, W1
N·m (lbf·ft)
R1 0.8 (0.6)
R2 0.8 (0.6)
R3 2 (1.5)
Auxiliary contact: 0.8 N·m (0.6 lbf·ft)
9
4
Tightening torque
U2, V2, W2 Grounding PE
N·m (lbf·ft) N·m
1.4 (1.0) 1.4
1.4 (1.0) 1.4
1.8 (1.3) 1.8
10
ACH550-01+B055+F278 Installation Supplement
2
lbf·ft
1.0
1.0
1.3
4
8
6
Operation principle and power cable installation
3
7
2
6
5
8