min
min
exp max
0.8RLd V
P
V
= × ×
æ ö
ç ÷
è ø
GUID-AF9BD6F2-E64B-424D-B361-49448A1CF690-ANSI V1 EN-US (Equation 414)
Where,
Pexpmax
is the maximum exporting active power
Vmin
is the minimum voltage for which
Pexpmax
occurs
0.8
is the security factor to ensure that the setting of
RLd
can be lesser than the calculated
minimal resistive load
ANSI11000304 V1 EN-US
Figure 255: Characteristics of load encroachment in R-X plane
8.21.3.3 Under voltage seal-in
GUID-946B8F59-8609-4F93-B346-AE053F1C2F9C v2
Settings involved in under voltage seal-in are:
OpMode27pickup: Under voltage seal-in feature is enabled using this setting and can
be selected as Disabled or Z2pick up or Z3pick up. If the under voltage seal-in has to be
Section 8 1MRK 504 163-UUS A
Impedance protection
510 Transformer protection RET670 2.2 ANSI
Application manual
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