CHAPTER 2 – POWER ELECTRONICS AND CABINET FEATURES 39
2.5 Door locking system
All doors of the drive and the transformer are either lockable or bolted.
Additionally, the door of the DFE-INU compart-
ment (3) is equipped with a safety switch. The
safety switch is tied into an interlocking circuit
that prevents the door being opened as long as the
DC link of the drive is charged.
The door of the control compartment (1) is not
integrated into the interlocking circuit and can
always be opened.
For further information, see:
• 10.6.6 Emergency release of the door safety
switch
• 10.6.7 Door handles
2-13
1. Door of control compartment:
lockable
2. Door of EMC and sine filter com-
partment: bolted
3. Door of DFE - INU compartment:
electromechanically locked
4. The door cannot be opened when
the main power is connected.
5. Doors of transformer: bolted
4 4 1 2 3
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