Load Encroachment Lepdis - ABB Relion REG650 Commissioning Manual

Section 7
Testing functionality
IEC10000142 V1 EN-US
Figure 12:
7.4.4

Load encroachment LEPDIS

Prepare the IED for verification of settings as outlined in
settings".
Values of the logical signals for LEPDIS are available on the local HMI under Main menu/Tests/
Function status/Impedance/LEPDIS/1:LEPDIS. The Signal Monitoring in PCM600 shows the
same signals that are available on the local HMI.
Load encroachment operates on the same measuring principles as the impedance measuring
zones. Thus, it is necessary to follow the same principles as for distance protection when
performing the secondary injection tests.
Measure operating characteristics during constant current conditions. Keep the measured
current as close as possible to the rated value of its associated input transformer or lower.
Ensure, however, that it is higher than 30% of the rated current.
Ensure that the maximum continuous current of an IED does not exceed four times its rated
value, if the measurement of the operating characteristics runs under constant voltage
conditions.
48
2
1
0
1
0
-1
2
1
0
2
1
0
2
1
0
1
0
-1
0 0.5 1 1.5
Boolean output signals for the injected current with two components: a
50 Hz current component and a component with 49 Hz
© Copyright 2011 ABB. All rights reserved
COMMON TRIP COMMAND (trip)
TRIPZ1 (tripZone1)
TRIPZ2 (tripZone2)
START (start)
GENMODE (generatorMode)
MOTMODE (motorMode)
2 2.5 3
time in seconds
→
1MRK 502 035-UEN A
3.5 4 4.5
IEC10000142-1-en.vsd
GUID-57618BF0-EDD3-40AE-B03B-8861A61D4E14 v1
6.1"Preparing the IED to verify
Generator protection REG650
Commissioning manual
5