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1MRK 506 355-UEN A
10.11.6.3
10.11.7
10.11.7.1
Line distance protection REL670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
10. Inject the polarizing voltage 3U0 to about 110% of the setting (3U0>) and adjust
the phase angle between the voltage and current to (180°- AnglRCA) setting, the
current leads the voltage.
11. Inject current in one phase to about 110% of the set operate current (IN>Dir ).
12. Activate the CRL binary input.
No ECHO and TRWEI should appear.
13. Abruptly reverse the current to 65° lagging the voltage to operate the forward
directional element.
No ECHO and TRWEI should appear.
14. Switch the current off and check that the ECHO, CS and TRWEI appear on the
corresponding binary output during 200ms after resetting the directional
element. If EF4PTOC also operates in forward direction, CS should be obtained.
15. Switch the polarizing voltage off and reset the CRL binary input.
Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
Direct transfer trip logic
Low active power and power factor local criteria LAPPGAPC
Prepare the IED for verification of settings as outlined in section
section
"Preparing for test"
1.
Connect the test set for three-phase current injection and three-phase voltage to
the appropriate IED terminals.
2.
Inject symmetrical phase voltages equal to the rated voltage.
3.
Decrease the injected current in phase L1 and note the operated value (start
value) of the studied step of the function. This current shall have the same phase
angle as the injected phase voltage. The active power for operation is calculated
=
×
P
U
I
as:
ph
ph
4.
Increase the current slowly and note the reset value.
5.
Connect a trip output contact to a timer.
6.
Set the injected current to 50% of the operate level in the tested stage. Switch on
the current and check the time delay.
in this chapter.
(single-phase active power).
Section 10
"Requirements"
and
221
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