86
Line differential protection (DIFL)
Chapter 11
Verifying settings by secondary
injection
(Equation 5)
(Equation 6)
(Equation 7)
The test is performed by injecting a single and a symmetrical three-phase current. If the
optional charging current compensation function is included, the CCComp shall be Off
and no measuring voltage connected to the terminal.
9.1
Testing the line differential protection
Procedure
1.
Block the trip signal.
The blocking can not be done by the COMBITEST test switch. It
has to be made on the station side of the test switch.
2.
Set the protection in test mode from the HMI unit.
The TestMode is found in the menu under:
Test/TestMode/Operation
The TestMode command must be saved in order to be activated.
When the protection is equipped with COMBITEST test switch,
the test mode is automatically activated but not saved when the test
handle is inserted.
3.
Prepare the terminal for verification of settings as outlined in
section “Prepare for test” in this chapter.
4.
Set the Disturbance report to Off.
This command is found in the menu under:
I
Diff
I
Local
I
Remote
+
=
I
Bias
I
Local
I
Remote
+
2
-------------------------------------------
=
I
Bias
(
)
Evaluate
Max
I
Bias
(
)
Own phase
[
]
OR 0.5
I
Bias
(
)
Other phases
⋅
[
]
{
}
=
Содержание REL 551-C1 2.3 Series
Страница 6: ...Contents Testing the interaction of the distance protection 109 ...
Страница 16: ...10 Note signs Chapter 2 Safety information ...
Страница 42: ...36 Checking the binary I O circuits Chapter 6 Checking the external circuitry ...
Страница 112: ...106 Testing the interaction of the distance protection Chapter 12 Verifying the internal configuration ...
