ABB REG670 - Page 204

The function activates the PICKUP and PUDIRIN outputs.
3. Assume that φ´ is the phase angle between injected voltage (3V
0
) and current
(3I
0
) i.e. φ´ = RCADir-φ. Change φ´ to for example 45 degrees. Increase the
injected current until the function trips.
4. Compare the result with the set value and make sure that the new injected 3I
0
·
3V
0
· cos φ is equal to the setting SN_PU. Take the set characteristic into
consideration, see figure
55 and figure 56.
5. Measure the trip time of the timer by injecting 1.2 · VNRelPU and a current to get
two times the set SN_PU trip value.
Tinv I V
test test
= ⋅ ⋅ ⋅
( )
TDSN SRef 3 3
0 0
cos ϕ
ANSIEQUATION2403 V2 EN-US (Equation 78)
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
Disabled.
Operation mode 3I
0
and φ
SEMOD175060-87 v8
1. Set the polarizing voltage to 1.2 · VNRelPU and set the phase angle between
voltage and current to the set characteristic angle (RCADir). Note that the current
lagging the voltage.
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.
Note that for pickup, both the injected current and voltage must be
greater than the set values INRelPU and VNRelPU respectively.
The function activates the PICKUPand PUDIRIN output.
3. Measure with angles j around RCADir +/- ROADir.
4. Compare the result with the set values, refer to figure 57 for example
characteristic.
5. Measure the trip time of the timer by injecting a current to get two times the set
SN_PU trip value.
Tinv I V
test test
= ⋅ ⋅ ⋅
( )
TDSN SRef 3 3
0 0
cos ϕ
ANSIEQUATION2403 V2 EN-US (Equation 79)
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
Disabled.
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
198 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual