The test procedure has to take into consideration that the shaped load encroachment
characteristic is active. It is therefore necessary to check the setting. To verify the
settings with the shaped load encroachment characteristic the test should be carried
out according to figures
31 and 32 and tables 12 and 13. In cases where the load
encroachment characteristic is activated tests according to the adjusted figures should
be carried out.
To verify the settings for the operating points according to the following fault types
should be tested:
• One phase-to-phase fault
• One phase-to-earth fault
The shape of the operating characteristic depends on the values of the setting
parameters.
The figures illustrating the characteristic for the distance protection
function can be used for settings with and without load encroachment.
The solid lines designate the diagram applicable when the load current
compensation operationLdCom parameter is set to 1 (On). This is the
default setting. The solid line and all test points except 13 are valid for
this setting.
When it is set to 0 (Off) then the dotted lines and test point 13 are valid.
Test points 5, 6, and 7 are not valid for this measurement.
X1
X
R (Ohm/phase)
50%
80%
1
2
3
4
5
6
7
8
9
10
11
80% of RLdFw
40% of RLdFw
0.5 x RFPP
12
13
120°
20°
a
c
IEC05000368-3-en
b
=
A
r
g
L
D
IEC05000368 V3 EN
Figure 33: Distance protection characteristic with test points for phase-to-phase
measurements
1MRK502053-UEN B Section 12
Testing functionality by secondary injection
Generator protection REG670 2.0 IEC 115
Commissioning manual
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