Tasks
WARNING!
When you start the supply unit, the drive DC bus will be energized, as will all the units connec-
ted to the DC bus. If you want to prevent this for any of the units, open its DC switch/discon-
nector (if available), or remove its DC fuses.
1.
Start the drive supply unit and energize the drive. See the delivery-specific circuit diagrams, and
the supply unit hardware manual.
If the drive is equipped with main breaker ([Q1], F255) or contactor ([Q2], F250),
the operating switch [S21] on the door of the drive incoming cubicle starts the supply unit and
triggers the drive power up sequence.
2.
Make sure that the drive and the DC system to be connected to the drive are ready for the closing
of the DC isolator/breaker [Q340] of the DC incoming unit.
3.
Crank in the DC isolator/breaker [Q340] of the DC incoming unit if it is in the DISCONNECTED
position. See
De-isolating the DC isolator/breaker [Q340] (page 48)
r.
4.
Close the DC isolator/breaker [Q340] of the DC incoming unit [Q340]. See
Start-up 43
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