IEC06000312 V1 EN-US
Figure 66: Typical for generators are long DC time constants. Their relation can
be such that the instantaneous fault current is more than 100 % offset
in the beginning.
7.3.3 Setting guidelines
SEMOD156687-1 v1
SEMOD155693-4 v3
Generator differential protection GENPDIF (87G) makes evaluation in different sub-
functions in the differential function.
• Percentage restrained differential analysis
•
DC, 2
nd
and 5
th
harmonic analysis
• Internal/external fault discriminator
Adaptive frequency tracking must be properly configured and set for
the Signal Matrix for analog inputs (SMAI) preprocessing blocks in
order to ensure proper operation of the generator differential protection
function during varying frequency conditions.
1MRK 502 071-UUS A Section 7
Differential protection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 179
Application manual
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