Siemens SIPROTEC 7UM62 - External Trip Functions; Functional Description; Setting Notes; Settings

Functions
2.45 External Trip Functions
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
313
2.45 External Trip Functions
Any signals from external protection or supervision units can be incorporated and processed in the digital
machine protection 7UM62 via binary inputs. Like the internal signals, they can be signaled, time delayed,
transmitted to the trip matrix, and also individually blocked. This way it is possible to include mechanical pro-
tection equipment, e.g. Buchholz protection, in the processing of messages of the digital protection device. Fur-
thermore, interaction of protection functions in different devices of the machine protection devices of the 7UM6
series is possible.
2.45.1 Functional Description
Mode of Operation
The logic status of the corresponding assigned binary inputs is checked at cyclic intervals. Change of input
status is considered only if at least two consecutive status checks have the same result. An additional time
delay 8602 T DELAY is available for the trip command.
The following figure shows the logic diagram for direct input trippings. This logic is implemented four times in
the same manner, the function numbers of the indications are each specified for the first external trip command
channel.
Figure 2-143 Logic Diagram of Direct Input Trippings
2.45.2 Setting Notes
General
External trip command via binary inputs is only effective and available if configured at addresses 186 EXT.
TRIP 1 to 189 EXT. TRIP 4 as Enabled. Disabled is set if the functions are not required. Addresses
8601 EXTERN TRIP 1 to 8901 EXTERN TRIP 4 are used to switch the functions individuallyON or OFF, or
to block only the trip command (Block relay).
Like the internal signals, they can be indicated as external trippings, time delayed and transmitted to the trip
matrix. The delay times are set at addresses 8602 T DELAY through 8902 T DELAY. Like for the protective
functions, the dropout of the direct input trippings is extended by the parametrized minimum duration TMin
TRIP CMD.
2.45.3 Settings