100
Line differential protection (DIFL)
&KDSWHU
9HULI\LQJVHWWLQJVE\VHFRQGDU\
LQMHFWLRQ
(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.
7HVWLQJWKHOLQHGLIIHUHQWLDOSURWHFWLRQ
3URFHGXUH
%ORFNWKHWULSVLJQDO
The blocking can
QRW
be done by the COMBITEST test switch. It
has to be made on the station side of the test switch.
6HWWKHSURWHFWLRQLQWHVWPRGH0,XQLW
The TestMode is found in the menu under:
7HVW7HVW0RGH2SHUDWLRQ
The
7HVW0RGH
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.
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VHFWLRQ³3UHSDUHIRUWHVW´LQWKLVFKDSWHU
6HWWKH'LVWXUEDQFHUHSRUWWR2II
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
⋅
[
]
{
}
=
Summary of Contents for REL 531
Page 16: ...10 Note signs KDSWHU 6DIHW LQIRUPDWLRQ ...
Page 44: ...38 Checking the binary I O circuits KDSWHU KHFNLQJ WKH H WHUQDO FLUFXLWU ...
Page 52: ...46 Checking the self supervision signals KDSWHU QHUJLVLQJ WKH WHUPLQDO ...
Page 140: ...134 Testing the interaction of the distance protection KDSWHU 7HVWLQJ WKH SURWHFWLRQ V VWHP ...
