10.4.9.1 Verifying the settings
Preconditions
The following output signal shall be configured to binary output available: ZOUT,
measured impedance within outer impedance boundary.
1. Keep the measured current as close as possible to its rated value or lower. Keep
it constant during the test, but ensure that it is higher than the set minimum
operating current.
2. Ensure that the maximum continuous current to the IED does not exceed four
times its rated value, if the measurement of the operating characteristics runs
under constant voltage conditions.
3. Make the necessary connections and settings of the test equipment for test of
point 1 according to figure
28.
4. Decrease the measured three-phase impedance slowly and observe the operation
value for the signal ZOUT.
5. Compare the operation value with the set value.
6. Do the necessary change of the setting of the test equipment and repeat step 4 and
step
5 for point 2, 3 and 4 according to figure 28.
10.4.9.2 Testing the power swing detection function ZMRPSB
Preconditions
The following output signals shall be configured to binary outputs: ZOUT, measured
impedance within outer impedance boundary, ZIN, measured impedance within inner
impedance boundary and START, power swing detection.
1. Slowly decrease the measured impedance in all three phases until the START
signal gets activated.
2. Increase the measured voltages to their rated values.
3. Decrease instantaneously voltages in all three phases to the values, which are
approximately 20% lower than the voltage that gives the set value R1LIn at the
predefined test current.
4. The START signal must not appear.
5. Increase the measured voltages to their rated values.
10.4.9.3 Testing the
tR1
timer
Preconditions
• The input I0CHECK, residual current (3I
0
) detection used to inhibit the start
output must be configured to the output signal STPE on the FDPSPDIS or
FRPSPDIS function.
• The input BLKI02, block inhibit of the start output for subsequent residual
current detection is connected to FALSE.
Section 10 1MRK 506 355-UEN A
Testing functionality by secondary injection
118 Line distance protection REL670 2.1 IEC
Commissioning manual
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