The maximum current is now automatically limited according to the new inverter configuration.
A mismatch between the number of detected modules and the value set in 95.13 will generate
a fault.
Returning the module
1. Install the module in reverse order. Use the following tightening torques:
• DC busbar assembly to upper insulators (2 × M8): 9 N·m (6.6 lbf·ft)
• DC busbar assembly to lower insulators (2 × M10): 18 N·m (13.3 lbf·ft)
• Fuses to DC busbars: 50 N·m (37 lbf·ft) (Bussmann), 46 N·m (34 lbf·ft)
(Mersen/Ferraz-Shawmut)
• Module to cabinet frame (4 × M8): 22 N·m (16 lbf·ft)
• DC busbar assembly to module DC input (2 × M12): 70 N·m (52 lbf·ft)
2. Restore the original wiring (STO and control unit power supply whenever needed).
3.
Set parameter 95.13 to 0 to disable the reduced run function.
4. If the Safe torque off (STO) function is in use, perform an acceptance test. See the STO
instructions.
Replacing DC fuses (frame R8i and multiples)
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
WARNING!
Read the safety instructions given in Safety instructions for ACS880
multidrive cabinets and modules (3AUA0000102301 [English]). If you
ignore them, injury or death, or damage to the equipment can occur.
Note: The illustrations represent a frame 2×R8i inverter cubicle with option +F286 (DC
switch-disconnector). On units without +F286, the DC busbars are oriented differently, but
the procedure is otherwise the same unless noted.
1.
Stop the drive and do the steps in section Electrical safety precautions (page 57) before
you start the work.
2. Remove the shroud (a) in front of the fuses.
Maintenance 125
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