Functional Description SWT 3000 Equipment Manual
Page - 4 Edition p3_3_2x 08/09 © SIEMENS AG 2008
Functional Description
The object of network protection is to selectively disconnect the faulty part of the system as
quickly as possible in the event of faults occurring in high-voltage systems. As a consequence of
ever higher power station outputs and the increasingly close interconnection of high-voltage net-
works very high demands are placed on network protection systems in terms of reliability and
availability. Network protection systems with absolute selectivity therefore need a reliable and fast
transmission system for the transfer of information between the stations.
The SWT 3000 for teleprotection signaling in analog and digital communication networks of-
fers the required maximum security and reliability together with the shortest command transmission
time. It replaces the two teleprotection signaling devices SWT 2000 F6 and SWT 2000 D.
The device can be used as a “stand-alone” unit or can also be integrated in the PowerLink PLC
system.
Combinations of analog and digital interfaces are possible in both cases. The analog interface is
operated in the VF range. The digital interfaces can be configured for X.21 or G703.1 (64kbit/s) or
G703.6 (2 Mbit/s).
SIEMENS
LID2 LID1
LIA
OK
SAL
EAL
S/N
>
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SWT 3000
Figure 1: SWT 3000 device with analog interface
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