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2 Functions
2.16.3.1 Trip-Dependent Indications
The storing of indications masked to local LEDs, and the maintenance of spontaneous
indications, can be made dependent on whether the device has issued a trip signal.
This information is then not output if one or more protection functions have picked up
during a system disturbance, but no tripping by the 7SD610 resulted because the fault
was cleared by a different device (e.g. on another line). These indications are then
limited to faults on the line to be protected.
The figure below illustrates the generation of the reset command for stored indica-
tions. When the relay drops off, stationary conditions (fault display on every pickup/on
trip only; trip/no trip) decide whether the new fault will be stored or reset.
Figure 2-105
2.16.3.2 Spontaneous Indications on the Display
You can select whether or not the most important data of a fault are displayed auto-
matically after the fault has occurred (see also „Fault Indications" in Section 2.17.2
„Processing of Messages").
2.16.3.3 Switching Statistics
The number of trips initiated by the device 7SD610 are counted. If the device is
capable of single-pole tripping, a separate counter for each circuit breaker pole is pro-
vided.
Furthermore, for each trip command the interrupted current for each pole is acquired,
output in the trip log and accumulated in a memory. The maximum interrupted current
is stored as well.
If the device is equipped with the integrated automatic reclosure, the automatic close
commands are also counted, separately for reclosure after single-pole tripping, after
three-pole tripping as well as separately for the first reclosure cycle and further reclo-
sure cycles.
The counter and memory levels are secured against loss of auxiliary voltage. They can
be set to zero or to any other initial value. For more details, refer to the SIPROTEC 4
System Description.
236
Creation of the reset command for the latched LED and LCD messages
7SD610 Manual
C53000-G1176-C145-4
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