Door Interlocking System - ABB ACS5000 User Manual

3.8

Door interlocking system

The doors of each PCU compartment are secured with an
electromechanical interlocking mechanism to prevent them from being
opened during operation.
The main protection features of the interlocking system are:
• Grounding switches (Fig. 3-22)
• Locking bars (Fig. 3-23)
The interlocking system ensures that you cannot connect the main power
supply to the drive until all doors of PCU compartments are closed and
locked and the grounding switches are in ungrounded position.
The interlocking system also ensures that you cannot open the doors of
PCU compartments until the main power supply is disconnected, the DC-
link capacitors are discharged and the grounding switches are in
grounded position.
The doors of the COU compartment (control unit and motor terminal
section) and the WCU compartment are not integrated into the
interlocking system and can be opened at all time. However, do not open
the swing frame of the control unit while the drive is in operation.
Note: For instructions on how to open and close doors, see "10.6.3
Opening and closing the doors" on page 174.
3BHS799208 E01 REV E
Figure 3-21 Location of protection features and lights
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03 POWER ELECTRONICS AND CABINET FEATURES
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