Siemens SIPROTEC 7SS523 V3.2 Manual page 186

Functions
PROT TR BUS
AUT LED ACK
Test mode SK
Language BU
I> MAN TRIP
I>TRIP
170
With setting released, changes of the bay unit parameter Bay status (XX12/CU)
from the bay units is released.
With setting blocked, changes to the bay unit parameter Bay status (XX12/CU)
locally from the bay units are blocked. Attempts to take a bay unit locally out of service
are rejected as "NOT PERMITTED".
The parameter PROT TR BUS (5401/CU) is used to activate and deactivate the se-
lective protection of a transfer busbar. The basic setting is NO.
With setting released the protection of the transfer busbar will be on. This setting
only makes sense in configurations with external current transformers.
With setting blocked the protection of the transfer busbar will be off.
The parameter AUT LED ACK (5103/CU) is used to activate and deactivate the au-
tomatic acknowledgement of LED indications.
With setting YES the LED indications will be refreshed with each new TRIP command.
With setting NO the LED indications will not be automatically refreshed.
The LED status is latched and must be reset via DIGSI, a binary input or from the op-
erator panel.
The parameter Test mode SK (5108A/CU) is used to activate and deactivate the
test mode for the ZPS-SK module (Chapter 8.2.4, page 287). Siemens recommends
to block all TRIP commands.
With test mode ON, the protection is blocked.
The parameter Language BU (5111A/CU) is used to select the UI language of the
bay units. The language of the annunciations displayed in the central unit is set via the
configuration of the central unit. If the bay unit is operated without a central unit, the
language is set locally via a parameter (7101/BU).
With the setting Deutsch, the menus in the bay unit display and the parameters and
annunciations in DIGSI are displayed in German.
With the setting English, French, Italian, Russian or Spanish the menus in
the bay unit display and the parameters and annunciations in DIGSI are displayed in
the selected language.
Independent of the above mentioned remarks on the device operation, for DIGSI, the
language settings of the DIGSI Device Manager apply.
The parameter I> MAN TRIP (6316/CU) is used to set the threshold of the feeder
current for the circuit breaker test. The feeder current that is allowed to flow during the
test must be less than this threshold. Thus, an unintentional tripping of a feeder in op-
eration can be prevented.
The parameter I>TRIP (XX13/CU) is used to set the threshold of the feeder current
for the trip release.
The setting of the parameter depends on the lowest short-circuit current to be expect-
ed.
7SS52 V4 Manual
C53000-G1176-C182-1