ABB REG670 - Page 161

I>
R
Rres
Rl
Rct Rct
Rl
UR
a) Through load situation
b) Through fault situation
UR
UR
c) Internal faults
UR
Protected Object
IEC05000427-2-en.vsd
IEC05000427 V2 EN
Figure 60: The high impedance principle for one phase with two current
transformer inputs
1MRK 502 071-UEN - Section 7
Differential protection
Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062 155
Application manual