ABB Relion 670 Series Technical Reference Manual page 376
Line differential protection ansi
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Applications manual (944 pages) ,
- Technical reference manual (752 pages)
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Section 6
Impedance protection
370
BLOCK
BC
AutiInit=On
ZACC
IL1
IL2
IL3
VA
VB
VC
IphPickup
VphPickup
Mode = Impedance
Mode = UILevel
Mode = UILvl&Imp
ANSI07000084 V1 EN
Figure 196:
Simplified logic diagram for Automatic switch onto fault logic, voltage
and current based.
OR
200
AND
0
deadLine
VILevel detector
SOTFVILevel
AND
AND
OR
AND
1MRK505222-UUS C
0
AND
15
0
1000
OR
en07000084_ansi.vsd
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