Technical Data - ABB Relion Technical Manual

1MRK 502 048-UUS A
7.5.7
Technical manual
X
A
R
AB
I ³
3 0.05
0
&
³ ×
3 I 0.2 I
0 phmax
BLOCK
I <
3 0.1
0
OR
< ×
3 I 0.4 I
0 phmax
ANSI10000226 V2 EN
Figure 86: Phase-to-phase AB operating conditions (residual current criteria)
Special attention is paid to correct phase selection at evolving faults. A DLECND 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 PHSEL 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 pickup and tripping signals.

Technical data

Table 82: LEPDIS technical data
Function
Load encroachment criteria:
Load resistance, forward and
reverse
Safety load impedance angle
Reset ratio
&
&
&
10 ms 0
&
0 20 ms
Range or value
(1.00–3000.00) Ω/phase
(5-85) degrees
105% typically
Section 7
Impedance protection
Block
DLECND
Bool to &
integer
ANSI10000226-2-en.vsd
Accuracy
± 5.0% static accuracy
± 2.0 degrees static angular
accuracy
Conditions:
Voltage range: (0.1-1.1) x V
Current range: (0.5-30) x I
n
-
n
191