IEC06000548_2_en.vsd
IED
B A
E
B
E
A
X’
d
X
T
Z
S
Zone 1 Zone 2
jX
R
ZB
ZA
Pole slip
impedance
movement
Zone 2
Zone 1
WarnAngle
TripAngle
f
ZC
IEC06000548 V2 EN-US
Figure 236: Settings for the Pole slip detection function
The ImpedanceZA is the forward impedance as show in figure
236. ZA should be the
sum of the transformer impedance XT and the equivalent impedance of the external
system ZS. The impedance is given in % of the base impedance, according to
equation 394.
EQUATION1883 V1 EN-US (Equation 394)
Section 8 1MRK 504 163-UUS A
Impedance protection
470 Transformer protection RET670 2.2 ANSI
Application manual
To Next Page
Loading...
