ABB Relion 670 Series Applications Manual page 125
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Also See for Relion 670 Series:
- Technical manual (1432 pages) ,
- Technical reference manual (1232 pages) ,
- Applications manual (944 pages)
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1MRK 511 401-UUS F
Rct
ANSI05000427 V2 EN-US
Figure 50: The high impedance principle for one phase with two current transformer inputs
Bay control REC670
Application manual
Rl
R
I>
Protected Object
VR
a) Through load situation
VR
b) Through fault situation
VR
c) Internal faults
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Rl
VR
Rres
ANSI05000427-2-en.vsd
Differential protection
Rct
Section 7
119
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