ABB RET670 Commissioning Manual page 152

Section 10
Testing functionality by secondary injection
Tinv
ANSIEQUATION2403 V2 EN-US
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Continue to test another function or complete the test by setting the test mode to
Operation mode 3I
1. Set the polarizing voltage to 1.2 ·
current to the set characteristic angle (
2. Inject current until the function picks up, and make sure that the trip current is equal to the
INRelPU setting for the set directional element.
The function activates the PICKUPand PUDIRIN output.
3.
Measure with angles j around
4. Compare the result with the set values, refer to figure
5. Measure the trip time of the timer by injecting a current to get two times the set
value.
Tinv
ANSIEQUATION2403 V2 EN-US
6. Compare the result with the expected value.
The expected value depends on whether definite or inverse time was selected.
7. Continue to test another function or complete the test by setting the test mode to
146
TDSN SRef 3 I 3 V
= ⋅ ⋅
0 test 0
and φ
0
Note that for pickup, both the injected current and voltage must be greater
than the set values
TDSN SRef 3 I 3 V
= ⋅ ⋅
0 test 0
cos ϕ ( )
⋅
test
VNRelPU and set the phase angle between voltage and
RCADir ). Note that the current lagging the voltage.
INRelPU and VNRelPU respectively.
RCADir +/- ROADir.
cos ϕ ( )
⋅
test
38 for example characteristic.
Commissioning manual
1MRK 504 154-UUS B
(Equation 78)
Disabled .
SEMOD175060-87 v8
SN_PU trip
(Equation 79)
Disabled .