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ABB Relion 670 Series Technical Reference Manual page 616

Line differential protection ansi

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Section 11

Secondary system supervision

610

Fuse failure detection

Main logic

TEST

TEST ACTIVE

AND

BlocFuse = Yes

BLOCK

20 ms

BLKTRIP

AND

t

All VL < VSealInPU

SealIn = Enabled

Any VL < VSealInPU

FuseFailDetDUDI

AND

OpDVDI = Enabled

FuseFailDetZeroSeq

AND

AND

FuseFailDetNegSeq

AND

UNsINs

UZsIZs

UZsIZs OR UNsINs

OpModeSel

UZsIZs AND UNsINs

OptimZsNs

CurrZeroSeq

a

a>b

CurrNegSeq

b

DeadLineDet1Ph

MCBOP

60 s

t

All VL > VSealInPU

VoltZeroSeq

OR

VoltNegSeq

AllCurrLow

52a

89b

ANSI10000033 V2 EN

OR

100 ms

t

FusefailStarted

OR

AND

AND

5 s

OR

t

OR

OR

AND

AND

200 ms

AND

t

150 ms

t

OR

AND

5 s

t

1MRK505222-UUS C

intBlock

AND

AND

OR

AND

OR

AND

OR

ANSI10000033-2-en.vsd

Technical reference manual

3PH

BLKZ

BLKV

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