Connecting the motor cables
Refer to the drawings below.
WARNING!
Obey the safety instructions given in ACS880 multidrives cabinets and
modules safety instructions (3AUA0000102301 [English]). If you ignore
the safety instructions, injury or death, or damage to the equipment
can occur.
If you are not a qualified electrical professional, do not do installation
or maintenance work.
1. Do the steps in section Electrical safety precautions (page 44) before you start
the work.
2. Remove the shroud in front of the output busbars.
3. For 360° grounding of the shield at the cable entry, remove the outer jacket of
each cable where they pass through the cable entry (a).
4. Cut the cable to suitable length and strip the ends of the individual conductors.
Twist the shield strands together to form a separate conductor and wrap it with
tape.
5. Crimp suitable lug terminals onto the phase conductors and the ground conductor.
The dimensions of the output busbars are shown in chapter Technical data.
6. Connect the phase conductors of the motor cable to the U2, V2 and W2 terminals.
Refer to section Use of fasteners in cable lug connections (page 61). You can
temporarily remove the plastic insulators (b) between the busbars to make the
installation work easier.
WARNING!
The plastic insulators (b) between the busbars must be in place when the
inverter is powered.
7. Connect the shield (and any grounding conductors) of the cable to the PE busbar
close to the cable entries.
8. Secure the cable mechanically.
9. Repeat the procedure for other modules (if any).
10. Install the shroud removed earlier.
11. At the motor, connect the cables according to instructions from the motor
manufacturer. Pay special attention to the phase order. For minimum
radio-frequency interference, ground the cable shield 360° at the cable entry of
the motor terminal box, or ground the cable by twisting the shield so that the
flattened shield is wider than 1/5 of its length.
56 Electrical installation
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