IEC10000226-1-en.vsd
&
&
t
10 ms
t
20 ms
&
Bool to
integer
STCNDLE
BLOCK
&
Block
IEC10000226 V1 EN
Figure 86: Phase-to-phase L1L2 operating conditions (residual current criteria)
Special attention is paid to correct phase selection at evolving faults. A STCNDLE
output signal is created as a combination of the load encroachment characteristic and
current criteria, refer to figure 86. This signal can be configured to STCND functional
input signals of the distance protection zone and this way influence the operation of
the phase-to-phase zone measuring elements and their phase related starting and
tripping signals.
7.5.7 Technical data
Table 82: LEPDIS technical data
Function
Range or value Accuracy
Load encroachment criteria:
Load resistance, forward and
reverse
Safety load impedance angle
(1.00–3000.00) Ω/phase
(5-85) degrees
± 5.0% static accuracy
± 2.0 degrees static angular
accuracy
Conditions:
Voltage range: (0.1-1.1) x U
r
Current range: (0.5-30) x I
r
Reset ratio
105% typically -
Section 7 1MRK 502 048-UEN A
Impedance protection
176
Technical manual
To Next Page
Loading...
Need help?
General
