ABB Relion 670 series

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SealIn = Enabled

All VL < VSealInPU

Any VL < VSealInPU

5 s

AND

3PH

MCBOP

All VL > VSealInPU

60 s

52a

BLOCK

AND

TEST

TEST ACTIVE

AND

BlocFuse = Yes

OpModeSel

AND

200 ms

AND

89b

BLKV

BLKZ

AND

FuseFailDetZeroSeq

V0I0 OR V2I2

V0I0 AND V2I2

V0I0

V2I2

OptimZsNs

AND

FuseFailDetNegSeq

AND

CurrZeroSeq

CurrNegSeq

a>b

AND

FuseFailDetDUDI

AND

OpDVDI = Enabled

DeadLineDet1Ph

AND

VoltZeroSeq

VoltNegSeq

5 s

AllCurrLow

150 ms

intBlock

Fuse failure detection

Main logic

BLKTRIP

AND

100 ms

20 ms

ANSI10000033-3-en.vsd

FusefailStarted

ANSI10000033 V3 EN-US

Figure 395: Simplified logic diagram for fuse failure supervision function, Main logic

1MRK 502 066-UUS B Section 13

Secondary system supervision

741

Technical manual

ABB Relion 670 series - Page 747

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