Toshiba GR200 Series Instruction Manual page 454

Line differential protection ied
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Function block diagram
2.34.3
The function diagrams for respective modes are illustrated; they represents the general flow
of the logic in the ARC1 function. For simplicity, the function block diagrams are represented
for CB1 in a 1CB arrangement in Figure 2.34-2, Figure 2.34-3, and Figure 2.34-4; the logics
are similar for CB2 in the 1.5CB arrangement except that only a single shot is permitted in
the 1.5CB arrangement. Note that the logics are shown for a two (2) shot scheme for simplicity.
Each functional block diagram is grouped into a number of logic blocks; four typical functional
block diagrams are illustrated below:
(i)
Issuing 'ARC SHOT1' and 'ARC SHOT2' in 1 CB of the SPAR mode
(ii)
Issuing 'ARC SHOT1' and 'ARC SHOT2' in 1 CB of the TPAR mode
(iii)
Issuing 'ARC SHOT1' and 'ARC SHOT2' in 1 CB of the SPAR and TPAR mode
(iv)
Issuing 'ARC SHOT1' and 'ARC SHOT2' in MPAR of parallel lines
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6F2S1914 (0.49)
GRL200 (Soft 033 & 037)

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