Siemens SIPROTEC 7UT613 series, Руководство пользователя

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2 Functions
294
7UT613/63x Manual
C53000-G1176-C160-2
2.20 Protection Function Control
The function logic coordinates the sequence of both the protective and ancillary func-
tions, processes the functional decisions, and data received from the system.
2.20.1 Pickup Logic for the Entire Device
2.20.1.1 General Device Pickup
The fault detection logic combines the pickup signals of all protection functions. The
pickup signals are combined with OR and lead to a general pickup of the device. It is
signalled with the alarm
„Relay PICKUP“
. If a protection function of the device is not
picked up any longer,
„Relay PICKUP“
disappears (indication
„functioning“
).
General fault detection is a requirement for a series of internal and external subse-
quent functions.
Among these functions, which are controlled by the general pickup, are:
• Start of a fault log: All fault messages are entered into the trip log from the beginning
of the general pickup to the dropout.
• Initialization of the fault recording: The recording and storage of fault wave forms
can additionally be made subject to the presence of a trip command.
• Creation of spontaneous displays: Certain fault messages can be displayed as so-
called spontaneous displays. This display can be made dependent on occurrence
of a trip command.
• External functions can be controlled via an output contact. Examples are: starting
of additional devices, or similar.
Spontaneous Dis-
plays Spontaneous indications are fault indications which appear in the display automatical-
ly following a general fault detection or trip command of the device. For 7UT613/63x,
these indications include:
•
„Relay PICKUP“
: the pickup of a protection function with phase indication;
•
„Relay TRIP“
: trip of any protection function;
•
„PU Time“
: = running time from general device pickup to dropout of the device, in
ms;
•
„Trip time“
: = the operating time from the general pickup to the first trip
command of the device, the time is given in ms.
Please note that the overload protection does not have a pickup in comparison to the
other protective functions. The general device pickup time (PU Time) is started with
the trip signal, which starts the trip log. The dropout of the thermal image of the over-
load protection ends the fault case and, thereby the running PU Time.