ACS2000 User manual 2UEA001270 Rev. F 2-17 (28)
Chapter 2 - Power electronics and cabinet features
2.3.1 Door safety interlocking
2.3.1.1 Function
There are two safety features in place on the AFE/INU compartment door
that prevent unsafe conditions:
• The interlocking system ensures that the MV switchgear cannot be
closed and the main power cannot be supplied to the drive unless the
door is securely closed and the grounding switch is in position not
grounded.
• The interlocking system also ensures that the door cannot be opened
until the main power is disconnected, the DC link capacitors are
discharged and the grounding switch is in position grounded.
Frame 3 drives also incorporate a third safety feature, the door interlocking
mechanism, to ensure that the three access doors are closed.
The door of the control compartment is not integrated into the interlocking
system and can always be opened.
Dangerous voltage is present. Grounding the drive does not switch off
control voltage from a separate source. Auxiliary power supply will remain
live.
Figure 2-15 Location of door safety interlocking
Legend
1 Kirk key
2 Grounding switch (shown in grounded position)
3 Grounding switch (shown in ungrounded position)
12
3
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