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IAn
IAt
IAn
IAt
Idiff
ANSI0700018_3_en.vsd
ANSI07000018 V3 EN
Figure 51:
Internal fault
IAn
IAt
External fault:
IAn = - IAt
IAn
IAt
Idiff
= 0
en07000019-2_ansi.vsd
ANSI07000019 V2 EN
Figure 52:
External fault
Generator differential protection GENPDIF (87G) function uses two mutually
independent characteristics to which magnitudes of the three fundamental frequency
RMS differential currents are compared at each execution of the differential protection
function. These two characteristics divide, each of them independently, the operate
Section 6
1MRK 502 048-UUS A
Differential protection
138
Technical manual
Содержание 650 series
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