SWT 3000 Equipment Manual Functional Description
© SIEMENS AG 2008 Edition p3_3_2x 08/09 Page - 19
Protection modes
The SWT 3000 system has the following different protective operating modes:
z Operating mode 1 (Double system protection) for the analog and/or digital interface.
The commands can be transmitted coded or uncoded with the application permissive
or direct tripping (selectable).
z Operating mode 2 (Single-phase protection) for the analog and/or digital interface.
The commands can be transmitted coded or uncoded with the application permissive
or direct tripping (selectable).
z Operating mode 3 (four commands with priority) for the analog and/or digital inter-
face. The commands are transmitted uncoded with the application permissive or di-
rect tripping (selectable).
z Operating mode 3a (4iC) for the transmission of four independent commands. The
commands are always transmitted coded with the application permissive or direct
tripping (selectable).
z Operating mode 3b (2plus2). This mode offers the transmission of two times mode 1.
Two commands are transmitted in the fast permissive transfer trip, the other two in
the direct transfer trip using the CT feature.
z Operating mode 4 (only one command active) for analog and/or digital interfaces.
The commands can be transmitted coded or uncoded with the application permissive
or direct tripping (selectable).
z Operating mode 5A (3 independent commands) for analog and/or digital interfaces.
The commands are transmitted uncoded with the application permissive or direct
tripping (selectable).
z Operating mode 5D (8 independent commands) only for operation with digital inter-
faces
Operating modes 1, 2, 3 and 4 were already used in the SWT 2000 F6 system. The new operat-
ing modes 3a, 3b resp. 5A are needed for variants that transmit 4 resp. 3 commands independ-
ently.
Operating mode 5D was previously used in the system SWT 2000 D.
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