Grid-Side Converter Supply; Over Voltage Protection; Auxiliary Voltage; Arc Protection - ABB ACS800 Series Hardware Manual

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generator to / from the supply grid. Before connection, the converter performs
network synchronization. In fault situations where the circuit breaker trips, the
converter stops and the user has to manually reconnect the breaker. See the section
Breaker settings.
Generator stator connections are in power cabinet (U/V/W).
Current transformers T109.1 and T109.2 are used to measure the stator current
from two phases. Measurement is made inside the control unit, which is part of
converter section.

Grid-side converter supply

Supply for grid-side converter is through grid-side contactor K1 and taken from bus
bars at the right top of power cabinet. Cables are routed to converter section from
the AC fuses F1.1-3.

Over voltage protection

Over voltage lightning protection of the grid-side converter is implemented by one
independent overvoltage protection device in each phase.The protection device is
installed below the power cabinet.

Auxiliary voltage

There are 3~ 690 VAC outputs available, and 1~ 230 VAC outputs. Maximum total
current from 690 VAC is 160 A.

Arc protection

The power cabinet is designed to give arc protection by placing the essential
ventilation holes to the backside of the cabinet. In case of an arc in bus bars, the arc
pressure and fumes leaves the cabinet from the backside thus causing minimum
damages.
Hardware description