ABB ACS1000i air-cooled, User Manual

Page: 54 / 174

03 POWER ELECTRONICS AND CABINET FEATURES
3BHS206977 E01 REV H ACS1000I AIR-COOLED USER MANUAL 54/174
3.6 Door locking system
To ensure safety and to prevent the doors being opened unintentionally, all doors are lockable.
The doors of compartments where medium voltages are present during operation (Fig. 2-18:
2) are electro-mechanically secured.
Additionally, the doors of the medium voltage compartments have locks with different inserts
than the control compartment door. The different lock inserts ensure that these doors can only
be opened by personnel authorized to do so.
Figure 3-23: Door locks
3.6.1 Additional cabinets
The door of an additional cabinet which contains medium voltage (eg, braking chopper, output
disconnector) is secured by a door monitoring switch. The switch releases the door when the
DC link of the drive has discharged and the drive has been grounded.
(1) Cover of terminal compartment: bolted
(2) Door of transformer and rectifier compartment:
electro-mechanically locked
- Door cannot be opened when the main power
is connected.
(3) Door of control compartment: lockable
- Door of inverter compartment: electro-
mechanically locked
(4) Door cannot be opened when the main power
is connected.
For more information, see “11.6.2 De-energizing the drive locally” on page 160.
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