ABB ACS880-07 - Connection Diagram; Connection Procedure; Electrical Installation of Custom Brake Resistors

Electrical installation of custom brake resistors
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Connection diagram
R+ R-
R+ R-
1 2 3
t°
1 2
X1
Brake chopper cubicle
Brake resistor cubicle
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Connection procedure
WARNING!
Obey the instructions in chapter Safety instructions. If you ignore them,
injury or death, or damage to the equipment can occur.
• Do the steps in section Electrical safety precautions in chapter Safety instructions
before you start the work.
• Connect the resistor cable at the resistor end only. If a shielded three-conductor
cable is used, cut off the third conductor. Ground the twisted shield of the cable
as well as any separate PE conductor (if present).
• At the chopper end of the cable, connect the R+ and R- conductors of the resistor
cable together. Measure the insulation resistance between the combined
conductors and the PE conductor by using a measuring voltage of 1 kV DC. The
insulation resistance must be higher than 1 Mohm.
340 Resistor braking