ABB ACS880-104 Hardware Manual page 171

Tasks
• Edit 95.08 DC switch monitoring if necessary (ie. with R1i...R7i modules equipped with a DC
switch/disconnector).
• Edit 95.09 Fuse switch control if necessary (ie. with R8i modules without a DC switch/disconnector and
charging controller).
• With R8i modules with option +C188 (direct-on-line cooling fan), set bit 14 of 95.20 HW options word
1.
• With parallel-connected R8i modules, select the inverter unit type in parameter 95.31 Parallel connection
rating id. You can filter the list using parameter 95.30.
• Reboot the control unit either by cycling the power, or by parameter 96.08 Control board boot.
Powering up the inverter unit
Close the cabinet doors.
Make sure that it is safe to connect voltage to the drive system. Ensure that:
• nobody is working on the unit or circuits that have been wired from outside into the cabinets
• cover of the motor terminal box is on.
Close the main disconnecting device of the drive system.
WARNING!
When connecting voltage to the supply unit, the DC busbars will become live, as will all the in-
verters connected to the DC bus.
WARNING!
Inverter units with a DC switch-disconnector:
Some types of inverter module may be energized through a charging circuit even when the DC
switch-disconnector is open or the DC fuses are removed.
Inverter units without a DC switch-disconnector:
If the inverter unit only has DC fuses without a switch fuse, all the inverter units with the DC fuses
in place will be energized when the main breaker/contactor closes. To prevent this, remove the
fuses from the inverter units which are to remain unenergized before connecting voltage. When
the main breaker/contactor of the supply unit is closed (DC busbars are live), never remove
or insert the DC fuses of an inverter unit.
Inverter cubicles with frame R1i...R5i modules:
Before closing the main DC switch-disconnector of the cubicle, leave open the fuse disconnectors
of those inverter modules that need not be powered at this time. Do not open or close any fuse
disconnectors under load.
Inverter units equipped with DC switch-disconnector (or fuse disconnectors): Close the DC switch/discon-
nector (or fuse disconnectors) of the inverter units that are to be powered up.
Inverter cubicles equipped with main DC switch-disconnector (frames R1i...R5i): Close the main DC
switch/disconnector.
WARNING!
Before closing the main contactor/air circuit breaker, make sure that sufficient inverter power is
connected to the intermediate (DC) bus.
As a rule of thumb,
• the sum power of the inverters connected must be at least 30% of the sum power of all inverters
• the sum power of the inverters connected must be at least 30% of the rated power of the brake
unit (Pbr.max) (if present).
If the above-mentioned rules are not followed, the DC fuses of the connected inverter units may
blow, or the brake chopper (if present) may be damaged.
Close the main contactor (or breaker) of the supply unit.
The DC bus is now powered, along with all inverters that are connected to it.
Checks with voltage connected to the inverter unit
Start-up 171
12