Function Block; Signals; Settings; Operation Principle - ABB RET650 Technical Manual

Section 7
Impedance protection
7.3.3
7.3.4
7.3.5
Table 63: LEPDIS Group settings (basic)
Name
RLd
ArgLd
Table 64: LEPDIS Non group settings (basic)
Name
GlobalBaseSel
7.3.6
138

Function block

LEPDIS
I3P* STCNDLE
U3P*
BLOCK
IEC10000119-1-en.vsd
IEC10000119 V1 EN
Figure 59: LEPDIS function block

Signals

Table 61: LEPDIS Input signals
Name
I3P
U3P
BLOCK
Table 62: LEPDIS Output signals
Name
STCNDLE

Settings

Values (Range) Unit
0.05 - 3000.00 ohm/p
5 - 85 Deg
Values (Range) Unit
1 - 6 -

Operation principle

The basic impedance algorithm for the operation of Load encroachment LEPDIS is
the same as for the distance zone measuring function. LEPDIS includes three
impedance measuring loops intended for phase-to-phase as well as for three-phase
faults.
Type Default Description
GROUP - Three phase group signal for current inputs
SIGNAL
GROUP - Three phase group signal for voltage inputs
SIGNAL
BOOLEAN 0 Block of function
Type Description
INTEGER Binary coded starts from load encroachment
Step Default
0.01 1.00
1 38
Step Default
1 1
1MRK 504 135-UEN A
Description
Load resistive reach in ohm/phase
Load encroachment inclination of load
angular sector
Description
Selection of one of the Global Base Value
groups
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