Siemens siprotec 7SJ63, Инструкция по эксплуатации

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Functions
6-162
7SJ63 Manual
C53000-G1140-C120-1
6.18 Protection Function Logic
The function logic is the heart of the device. It coordinates the sequence of both the
protective and auxiliary functions, processes functional decisions, and processes data
received from the system. In particular, the function logic is responsible for the follow-
ing:
•
Processing Measurement and Detection Logic
•
Processing Tripping Logic
6.18.1 Pickup Logic for the Entire Device
General Device
Pickup and
Dropout The pickup signals for all protective functions in the device are connected via an “OR”
function, and lead to the general device pickup. General device pickup is initiated by
the first function to pickup, and general device drop out occurs when the last function
drops out. A corresponding message indicating that general device pickup has oc-
curred is reported.
General device pickup is a precondition for a series of internal and external functions
that occur subsequently. The following are among the internal functions controlled by
general device pickup:
•
Start of Trip Log: From general device pickup to general device drop out, all fault
messages are entered in the trip log.
•
Initialization of Oscillographic Records: The storage and maintenance of oscillo-
graphic values can also be made dependent on the general device pickup.
•
Generation of Spontaneous Messages: Certain fault messages are displayed in the
device display as so-called spontaneous messages (see below). This display can
also be made dependent on the general device pickup.
External functions can be controlled by general device pickup, using an output con-
tact. Examples are:
•
Restarting devices
•
Starting of additional devices, or similar
6.18.2 Tripping Logic of the Entire Device
General Trip The tripping signals for all protective functions are connected by “OR” and generate a
message indicating that the device has initiated a trip signal.
This message can be configured to an LED or binary output, just as the individual trip-
ping messages can.
Terminating the
Tripping Signal
•
All trip signals from a protection function hold the
5HOD\75,3
function, and
start the minimum trip signal duration timer (set at address
7PLQ75,3&0'
,
see Figure 6-69). This trip signal duration timer ensures the trip signal is transmitted
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