Connecting Voltage To Grid Terminals And Auxiliary Circuit; Starting The Grid-Side Converter - ABB ACS800 Series Hardware Manual

88
Action
Write down the following data on the converter system for later use. Note
down any deviations from delivery documents.
• Generator, pulse encoder and cooling fan rating plate data
• Maximum and minimum speeds
• Speed scaling factor, gear ratio, etc.
• Acceleration and deceleration times
• Inertia compensation
Check that circuit breakers and protection switches in the cooling fan
supply circuit are closed.
Locate the PPCS branching unit (APBU-xx). Enable memory backup
battery by setting actuator 6 of switch S3 to ON. (Only with parallel
connected rotor-side modules.)
Measure the insulation resistance of the 690 V system to the ground. It
shall be more than 10 M .
Measure the insulation resistance of the stator connection to the ground.
It shall be more than 10 M .

Connecting voltage to grid terminals and auxiliary circuit

WARNING! When voltage is connected to the grid terminals, voltage
may also be connected to the auxiliary circuits of the converter.
WARNING! Never remove or insert the DC fuses of the converter's DC
link when the main contactor is closed (DC busbar is live).
Make sure that it is safe to apply voltage. Ensure that
• nobody is working on the unit or circuits that are wired from outside into
the cabinets
• cabinet doors are closed.
Open all the breakers, switches and other protection devices and leave
them open. Close the doors.
Connect the grid voltage by closing the supply grid breaker. Observe any
abnormalities.
Close the auxiliary voltage disconnector Q120 and observe any
abnormalities.
Open the supply grid disconnector. Open the auxiliary voltage
disconnector Q120 and open the cabinet door.
Disconnect the auxiliary voltage cables that lead from the terminal blocks
to the outside of the equipment and have not yet been checked. Also
disconnect any uncompleted wiring.
Disconnect the communication link between the converter system and
any overriding system.
Make sure the main contactor / air circuit breaker cannot be switched on
inadvertently by remote control.
Be ready to trip the main breaker of the supply transformer in case
something abnormal occurs.
Close the main breaker of the supply transformer.
Close the auxiliary circuit On/Off switch.

Starting the grid-side converter

Start-up
Additional information
See the circuit diagrams delivered
with the converter.
By default, memory backup is
switched off to save the battery.
See the circuit diagrams delivered
with the converter.
The input terminals of the converter
system are now energised.
The auxiliary voltage circuit is now
energised.