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Function Block, Zone 5; Logic Diagram - ABB REL 501-C1 2.5 Technical Reference Manual

Line distance protection terminal

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1.5

1.6

Distance protection (ZM)

Function block, zone 5

ZM5--

ZM5

BLOCK

TRIP

BLKTR

START

VTSZ

STND

STCND

xx00000177.vsd

Figure 24:

ZM5 function block

Logic diagram

STCND

AND

L1L2

L2L3

AND

AND

L3L1

AND

L1N

AND

L2N

AND

L3N

VTSZ

OR

BLOCK

Figure 25:

Conditioning by a group functional input signal ZM1--STCND

OR

OR

OR

AND

Chapter 4

Line distance

STZMPP

STNDL1L2

STNDL2L3

STNDL3L1

STNDL1N

STNDL2N

STNDL3N

STNDPE

STND

BLK

99000557.vsd

61

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