ABB ACS880-207, Hardware Manual

Page: 68 / 148

Start-up procedure
Tasks
Safety
WARNING!
Follow the safety instructions during the start-up procedure. See Safety instructions for ACS880
multidrive cabinets and modules (3AUA0000102301 [English]). Only qualified electricians are
allowed to start-up the drive.
Checks/Settings with no voltage connected
Make sure that the disconnector of the supply transformer is locked to the off (0) position, that means
no voltage is, or cannot be connected to drive inadvertently.
If a generator is used as a supply: The recommendation for ACS880 IGBT supply unit with generator
supply is:
•always use BAMU auxiliary measurement unit
•short-circuit ratio of the grid > 3
•short-circuit ratio of the generator 1/Xk > 2
•generator nominal power
P
gen
> 0.3 × P
ISU
Open the main disconnecting device of the drive:
Supply unit with main switch-disconnector ([Q1], F253): Open the switch-disconnector [Q1].
Supply unit with main breaker ([Q1], F255): Rack out the main breaker [Q1].
Supply unit with a main circuit breaker: Set the current trip limits of the breaker. The trip limits have
been preset to generic values by the breaker manufacturer. The generic limits do not correspond the
protection requirements of the application.
For the limit rules, see below.
General rules
Make sure that the selectivity condition is fulfilled, that is the breaker trips at the lower current than the
protection device of the supplying network, and that the limit is high enough not to cause unnecessary
trips during the intermediate DC circuit load peak at start.
Long term current limit
Rule of thumb: Set to the rated AC current of the module.
Peak current limit
Rule of thumb: Set to a value 3…4 times the rated AC current of the module.
Supply unit with the grounding switch ([Q9], F259): Close the grounding switch [Q9].
WARNING!
Do not use excessive force. There is electromagnetic interlocking in use. See section Electro-
magnetic interlocking (page 70) .
Open the charging circuit switch fuse [Q3].
Check the mechanical and electrical installation. See the installation checklist.
Check the settings of breakers/switches in the auxiliary circuits. See the delivery-specific circuit dia-
grams.
Disconnect the unfinished or unchecked 230 V AC cables that lead from the terminal blocks to the
outside of the equipment.
Check that both circuits of Safe torque off on the BCU control unit [A41] are closed for the supply unit
to start. (IN1 and IN2 must be connected to OUT.) See chapter
The control unit .
68 Start-up