ABB REL 551 2.3 Series - Page 106

100
Line differential protection (DIFL) &KDSWHU
9HULI\LQJVHWWLQJVE\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.
 7HVWLQJWKHOLQHGLIIHUHQWLDOSURWHFWLRQ
3URFHGXUH
 %ORFNWKHWULSVLJQDO
The blocking can QRW be done by the COMBITEST test switch. It
has to be made on the station side of the test switch.
 6HWWKHSURWHFWLRQLQWHVWPRGHIURPWKH+0,XQLW
The TestMode is found in the menu under:
7HVW7HVW0RGH2SHUDWLRQ
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.
 3UHSDUHWKHWHUPLQDOIRUYHULILFDWLRQRIVHWWLQJVDVRXWOLQHGLQ
VHFWLRQ³3UHSDUHIRUWHVW´LQWKLVFKDSWHU
 6HWWKH'LVWXUEDQFHUHSRUWWR2II
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
⋅[]{}=