Table of Contents
Advertisement
Functions
2.8 Function Control
If the device issues a final trip command, the contact remains closed. This is the case, during the reclaim time
of the automatic reclosure cycle, when the automatic reclosure is blocked or switched off or, due to other
reasons is not ready for automatic reclosure (e.g. tripping only occurred after the action time expired).
Figure 2-65 shows time diagrams for manual trip and close as well as for short-circuit tripping with a single,
failed automatic reclosure cycle.
Figure 2-65
Breaker tripping alarm suppression — sequence examples
Trip-dependent Indications
The storage of messages allocated to local LEDs and the availability of spontaneous indications can be made
dependent on the device sending a trip command. The information is not output if one or more protection func-
tions have picked up during a fault but the 7VK61 did not trip because the fault was cleared by a different device
(e.g. on a different line). These indications are then limited to faults on the line to be protected.
Figure 2-66
160
Logic diagram of the no–trip–no–flag feature (command-dependent alarms)
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009
Advertisement
Table of Contents
