Table of Contents
Advertisement
1MRK 506 331-UUS A
6.3.5.2
6.3.5.3
Commissioning Manual
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 15.
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
step
5
for point 2, 3 and 4 according to figure 15.
Testing the power swing detection function ZMRPSB (68)
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 PICKUP, power swing detection.
1.
Slowly decrease the measured impedance in all three phases until the PICKUP
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 PICKUP signal must not appear.
5.
Increase the measured voltages to their rated values.
tR1 timer
Testing the
Preconditions
•
The input I0CHECK, residual current (3I
output must be configured to the output signal STPE on the FDPSPDIS (21) function.
•
The input BLK_SS, block inhibit of the pickup output for subsequent residual
current detection is connected to FALSE.
Testing functionality
) detection used to inhibit the pickup
0
Section 6
4
and
59
Advertisement
Table of Contents
