Functionality - ABB REG650 Technical Manual

Section 7
Impedance protection
7.4.2
7.4.3
7.4.4
7.4.5
Table 63: LEPDIS Group settings (basic)
Name Values (Range)
RLd 0.05 - 3000.00
LdAngle 5 - 85
162

Functionality

Heavy load transfer is common in many power networks and may make fault
resistance coverage difficult to achieve. In such a case, Load encroachment (LEPDIS)
function can be used to prevent operation of the of the underimpedance measuring
zones during heavy loads.
Function block
LEPDIS
I3P* DLECND
V3P*
BLOCK
ANSI10000119-1-en.vsd
ANSI10000119 V1 EN
Figure 76: LEPDIS function block
Signals
Table 61: LEPDIS Input signals
Name Type
I3P GROUP
SIGNAL
V3P GROUP
SIGNAL
BLOCK BOOLEAN
Table 62: LEPDIS Output signals
Name Type
DLECND INTEGER
Settings
Unit Step
ohm/p 0.01
Deg 1
Default Description
- Three phase group signal for current inputs
- Three phase group signal for voltage inputs
0 Block of function
Description
Binary coded starts from load encroachment
Default Description
1.00 Load resistive reach in ohm/phase
38 Load encroachment inclination of load
angular sector
1MRK 502 043-UUS B
Technical Manual