ABB ACS2000 User Manual page 32

32 A C S 2 0 0 0 , 4 K V U S E R M A N U A L
—
Door safety interlocking
32
Location of door
safety interlocking
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
Kirk key interlock
The Kirk key system is mechanically interlocked to
the upstream disconnect using one master key and
two locks. The key must be in place in the upstream
disconnect in order for the drive to be energized.
Follow local lock-out, tag-out safety procedures.
See Appendix I - Kirk Key Specifications, located on
the CD, for detailed information.
See Appendix P - Integral Input Contactor
Disconnect, located on the CD, for detailed
information on drives with this option.
The upstream disconnect may be the integral input
contactor disconnect option.
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.
DANGER
WARNING: Dangerous voltage is
WARNING
present. Grounding the drive does
not switch off control voltage from
CAUTION
a separate source. Auxiliary power
supply will remain live.
NOTICE
1
1 Kirk key
2 Grounding switch (shown in grounded position)
3 Grounding switch (shown in ungrounded position)
The Kirk key for this option is located behind the
door of the disconnect section.
Grounding switch
The grounding switch will only allow the capacitors
to be charged when the switch is in the
ungrounded position.
Door interlocking mechanism, Frame 3 only
The door interlocking mechanism is a spring loaded
rotating bar with door stops located just inside the
MCB and AFE/INU doors at the bottom of the
Frame 3 drive cabinet, which ensures that the doors
allowing access to medium voltage equipment are
closed before the drive is operational. Once all
doors are secured, the Kirk key and ground switch
can be operated as indicated in sections Kirk key
interlock and Grounding switch.
2
3