ABB ACS880-204, Руководство по оборудованию

Страница: 119 / 404

Note: When the internal EMC filter is disconnected, the IGBT supply module is not EMC
compatible.
WARNING!
If a supply module whose varistors are not disconnected is installed on an IT
system (an ungrounded power system or a high resistance grounded [over
30 ohms] power system), the system is connected to earth potential through
the varistors of the supply module. This may cause danger or damage the
supply module.
If a supply module whose varistors are not disconnected is installed on a corner
grounded TN system, the supply module will be damaged.
4. Fasten the two cable clamp plates included in the supply module, one at the top, one
at the bottom. The clamp plates are identical. Using the cable clamp plates will provide
better EMC compliance, as well as act as a strain relief for the power cables.
5. Strip the power cables so that the shields are bare at the cable clamps.
6. Twist the ends of the cable shield wires into pigtails.
7. Strip the ends of the phase conductors.
8. Connect the phase conductors to the input terminals of the main switch-disconnector
[Q1]. For the tightening torques, see
Cabinet design and construction instructions for
ACS880 multidrive modules (3AUA0000107668 [English]).
9. Connect the output terminals of the main switch-disconnector [Q1] to the main contactor
[Q2] input terminals.
10. Connect the contactor [Q2] output terminals to the WFU-xx LCL filter module input
terminals (L1/L2/L3). See section Connecting the WBCA adapter to the LCL filter (frames
R1i…R4i) (page 131) .
11. Connect the phase conductors of the WFU-xx LCL filter module output terminals
(U2/V2/W2) to the phase conductors of the AC input terminals (U2/V2/W2) of the IGBT
supply module. See section
Connecting WFU-xx LCL filter module (frames
R1i…R4i) (page 132)
12. Connect the phase conductors of the DC output cable to the UDC+ and UDC- terminals
of the IGBT supply module.
Connect the resistor cable conductors (if present) to the R+ and R- terminals.
With frames R3i or R4i, attach the screw terminal lugs included to the conductors first.
Crimp lugs can be used instead of the screw lugs.
13. Tighten the cable clamps onto the bare cable shields.
14. Crimp a cable lug onto each shield pigtail. Fasten the lugs to ground terminals.
Note: Make a compromise between the length of the pigtail and the length of unshielded
phase conductors as both should ideally be as short as possible.
15. Cover visible bare shield and pigtail with insulating tape.
16. With frames R3i or R4i, cut suitable slots on the edges of the connector covers to
accommodate the AC and DC cables. Refit the covers. (Tighten the screws to 3 N·m
[25 lbf·in]).
17. Secure the cables outside the unit mechanically.
18. Ground the other end of the input power cable shield or PE conductor(s) at the distribution
board.
19. Connect the module DC busbars into the cabinet common DC busbars.
Electrical installation 119
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