ABB Relion 670 Series Commissioning Manual page 122

Section 11
Testing functionality by secondary injection
Ensure that the maximum continuous current in an IED does not exceed four times its rated
value, if the measurement of the operating characteristics runs under constant voltage
conditions.
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
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.
X1Zx
IEC05000368 V4 EN-US
Figure 31:
Table 26
116
31 and 32 and tables 26
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 is
active. The solid line and all test points except 13 are valid for this case.
When the load current compensation is inactive, the dotted lines and test point
13 are valid. Test points 5, 6, and 7 are not valid for this measurement.
X
2
1
11
10
12
120°
a
9
8
40% of RLdFw
80% of RLdFw
0.5 x RFPPZx
Distance protection characteristic with test points for phase-to-phase
measurements
is used in conjunction with figure 31.
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and 27. In cases where the load encroachment characteristic is
80%
3
50%
4
5
6
R (Ohm/phase)
7 13
c
20°
IEC05000368-4-en.vsdx
1MRK 504 165-UEN E
Transformer protection RET670
Commissioning manual