Function Control; General; Line Energisation Recognition - Siemens Siprotec 7VK61 Manual

Functions

2.8 Function Control

2.8 Function Control
2.8.1

General

The function control is the control centre of the device. It coordinates the sequence of the protection and ancil-
lary functions, processes their decisions and the information coming from the power system.
Applications

• Line energisation recognition,

• Processing of the circuit breaker position(s),
• Open Pole Detector,
• Fault detection logic,
• Tripping logic.
2.8.1.1 Line energisation recognition
During energisation of a protected object, several measures may be required or desirable. Following manual
closing onto a short-circuit, for instance, immediate re-opening of the circuit breaker is usually desired. For most
short-circuit protection functions, at least one stage can be selected to trip without delay following energisation
as described in the corresponding sections.
The manual closing command must be indicated to the device via a binary input. To be independent of the in-
idvidual manual closing operation, the command is set to a defined length in the device (adjustable with the
address 1150 SI Time Man.Cl). This setting can only be changed in DIGSI at Display Additional Settings.
Figure 2-57 shows the logic diagram.
Figure 2-57 Logic diagram of the manual closing procedure
150
SIPROTEC, 7VK61, Manual
C53000-G1176-C159-3, Release date 05.2009