Planning the electrical installation 65
Protecting the converter against ground faults
in the converter, grid cable, rotor or rotor cable
The rotor-side converter is equipped with an internal ground fault protective function to
protect the converter against ground faults in the generator and rotor cable. The grid-side
converter is equipped with an internal ground fault protective function to protect the
converter against ground faults in the converter or grid cable. This is not a personal safety
or a fire protection feature.
Implementing the emergency stop function
The converter is equipped with emergency stop function of Category 0 (immediate
removal of power) as standard.
For safety reasons, install the emergency stop devices at each operator control station
and at other operating stations where emergency stop may be needed.
See also section Control connections on page 80.
Supplying power for the auxiliary circuits
As standard the converter auxiliary circuit is to be supplied from the power supply network
through an external auxiliary voltage transformer and UPS. The converter is equipped with
terminals for connecting external control voltages (X1 and X2). The circuit breakers are
located in the auxiliary control cubicle of the converter. For information on the power
consumption of auxiliary devices, see section Auxiliary circuit current consumption on
page 129.
Uninterrupted auxiliary power supply for the converter (UPS)
The converter is equipped with a 1-phase 230 V AC (50/60 Hz) connection for control
electronics to be supplied by UPS (UPS not included in the ABB delivery). It is
recommended to use an on-line type of UPS the output voltage of which does not depend
on the voltage and frequency of the power supply network. In case of UL and without
option +C108 or +C109 also 1-phase 50/60 Hz is allowed.
Auxiliary power supply for converter (non-UPS)
The converter is equipped with a 1-phase 230 V AC (50/60 Hz) connection for heating
control logic and cooling fan supply power. In case of UL and without option +C108 or
+C109 also 1-phase 50/60 Hz is allowed.
To Next Page
Loading...
