Safety Instructions Notes Readers are notified of the need for special attention or additional information available on the subject with the fol- lowing symbols: CAUTION! Caution emphasizes a matter in order to draw special attention to it. Note! Note gives additional information or points out more information available on the subject. General Safety Instructions These safety instructions are intended for all work on the ACS 300. WARNING! All electrical installation and maintenance work on the ACS 300 should be carried out by qualified electricians. The ACS 300 and adjoining equipment must always be properly grounded. The motor and all accessories must be grounded through ACS 300.
All the ACS 300 units include capacitors connected between the main circuit and the frame. These capacitors increase the ground leakage current through the ground connection to the power line and may cause some ground fault circuit breakers to trip. WARNING! All electrical installation and maintenance work on the ACS 300 should be carried out by qualified electricians. Do not attempt any work on a powered ACS 300. After switching off the power, always allow the DC bus capacitors 5 minutes to discharge before working on the AC drive, the motor or the motor wiring. It is good practice to check (with a voltage indicating instrument) that the AC drive is in fact unpowered before beginning work.
vi ACS 300 User’s Manual