Function Control; Pickup Logic For The Entire Device; Functional Description; Tripping Logic For The Entire Device - Siemens SIPROTEC 4 7VE61 Manual

Functions

2.13 Function Control

2.13 Function Control
The function logic coordinates the sequence of both the protective and ancillary functions, processes the func-
tional decisions, and data received from the system.

Pickup Logic for the Entire Device

2.13.1
This section describes the general pickup and spontaneous messages in the device display.
2.13.1.1

Functional Description

General Device Pickup
The pickup signals for all protection functions in the device are logically OR-combined, and lead to the general
device pickup. It is initiated by the first incoming pickup, ends when the last function drops out and is indi-
cated as general device pickup
The general pickup is a prerequisite for a number of internal and external consequential functions. These func-
tions, which are controlled by the general pickup, include:
•
Start of Trip Log: From start of the general device pickup to device drop out, all fault indications are
entered in the trip log.
•
Initialization of fault recording: The storage and maintenance of fault values can also be made dependent
on the occurrence of a trip command.
•
Generation of Spontaneous indications in the device display: Certain fault indications are displayed in the
device display as so-called spontaneous indications (see below "Display—Spontaneous Indications"). This
display can also be made dependent on a general device trip.
Display–Spontaneous Messages
Spontaneous indications are fault indications that appear in the display automatically when general device
pickup has occurred. In the case of 7VE61 and 7VE63 they are the following:
"Protection Pickup":
"Protection Trip":
"PU Time":
"Trip time":

Tripping Logic for the Entire Device

2.13.2
This section comprises a description regarding the general trip and termination of the trip command.
2.13.2.1 Functional Description
General Trip
The tripping signals for all protective functions are connected by "OR" and generate a message
Die Auslösesignale aller Schutzfunktionen werden mit ODER verknüpft und führen zur Meldung
This indiciation, like individual trip indications, can be allocated to an LED or an output relay. It can also be
used as a sum event.
Control of the Trip Command
For controlling the trip command the following applies:
118
Relay PICKUP .
the protection function that last picked up
the protection function that last initiated a trip signal
the operating time from the general pickup to the
dropout of the device, the time is given in ms
the operating time from general pickup to the first
trip command of the device, in ms
Relay TRIP .
Relay TRIP .
SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017