ABB Relion 670 series - Page 376

ABB Relion 670 series

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AND

AND

BLOCK

AutiInit=On

ZACC

OR

TRIP

en07000084_ansi.vsd

VILevel detector

IL1

IL2

IL3

VA

VB

VC

IphPickup

VphPickup

deadLine

AND

AND

OR

AND

OR

SOTFVILevel

BC

Mode = Impedance

Mode = UILevel

Mode = UILvl&Imp

0

15

200

0

1000

0

ANSI07000084 V1 EN

Figure 196: Simplified logic diagram for Automatic switch onto fault logic, voltage

and current based.

Section 6 1MRK505222-UUS C

Impedance protection

370

Technical reference manual

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