/PERATING INSTRUCTIONS
3*
6
# ' #
4ESTING THE DIRECTIONAL OVERCUR
RENT TIME PROTECTION
IF AVAILABLE
)F THE RELAY IS FITTED WITH THE DIRECTIONAL DETERMINATION
SUPPLEMENT MODEL 3*
J JJJJ
JJJ
THIS
CAN BE TESTED WITH AN ADDITIONAL SYMMETRICAL THREE
PHASE VOLTAGE SOURCE 4HE RELATED FUNCTION MUST BE
SWITCHED ON IE ADDRESS /# $)20(
/.
ANDOR ADDRESS $)2%# )%
/.
CONTRARY TO
DELIVERED SETTING !DDRESSES AND MUST
BE SWITCHED TO
) $)2 !,7!93
AS DELIVERED IN
ORDER TO ALLOW THE ) STAGES TO OPERATE INDEPEN
DENT OF THE AUTO RECLOSE FUNCTION
4HE STAGES OF THE DIRECTIONAL PHASE OVERCURRENT TIME
PROTECTION ARE TESTED IN THE SAME WAY AS DESCRIBED
IN 3ECTION FOR DEFINITE TIME OVERCURRENT PROTEC
TION OR FOR INVERSE TIME OVERCURRENT PROTEC
TION BUT THIS TIME WITH THE APPLIED THREE PHASE
VOLTAGE APPROXIMATELY RATED VOLTAGE 7HEN THE PO
LARITY OF THE VOLTAGES RELATED TO THE CURRENTS IS CORRECT
TRIP WILL NOW OCCUR NOT CORRESPONDING TO THE NON DI
RECTIONAL TIME DELAYS ADDRESSES OR
BUT CORRESPONDING TO
4 ) $)2 ADDRESS S AT DELIVERY
4 ) $)2 ADDRESS S AT DELIVERY IN DEF
INITE TIME OVERCURRENT MODE
4 )P $)2 ADDRESS TIME MULTIPLIER AT DE
LIVERY IN ).6 4)-% )%# OVERCURRENT MODE OB
SERVE THE SET CHARACTERISTIC ACCORDING ADDRESS
IT MAY BE DIFFERENT FROM THAT FOR THE NON DI
RECTIONAL STAGE
$ )P $)2 ADDRESS TIME MULTIPLIER AT
DELIVERY IN ).6 4)-% !.3) OVERCURRENT MODE OB
SERVE THE SET CHARACTERISTIC ACCORDING ADDRESS
IT MAY BE DIFFERENT FROM THAT FOR THE NON DI
RECTIONAL STAGE
4ESTING WITH EARTH FAULT IS PERFORMED WITH A SINGLE
PHASE CURRENT VIA ONE PHASE AND THE EARTH PATH AND
THE MEASURED VOLTAGE OF THE SAME PHASE IS SWITCHED
OFF FROM THE RELAY TERMINAL 4HE TIME DELAY NOW MUST
BE
4 )% $)2 ADDRESS S AT DELIVERY
4 )% $)2 ADDRESS S AT DELIVERY IN
DEFINITE TIME OVERCURRENT MODE
4 )%P $)2 ADDRESS TIME MULTIPLIER AT
DELIVERY IN ).6 4)-% )%# OVERCURRENT MODE OB
SERVE THE SET CHARACTERISTIC ACCORDING ADDRESS
IT MAY BE DIFFERENT FROM THAT FOR THE NON DI
RECTIONAL STAGE
$ )%P $)2 ADDRESS TIME MULTIPLIER AT
DELIVERY IN ).6 4)-% !.3) OVERCURRENT MODE OB
SERVE THE SET CHARACTERISTIC ACCORDING ADDRESS
IT MAY BE DIFFERENT FROM THAT FOR THE NON DI
RECTIONAL STAGE
3HOULD THE DIRECTIONAL CHARACTERISTIC BE VERIFIED THEN
NOTE
$IRECTIONAL DETERMINATION CAN BE PERFORMED WITH
QUADRATURE VOLTAGES FAULT FREE VOLTAGES AND
MEMORIZED VOLTAGES 4HAT IS WHY ALWAYS ALL THREE
VOLTAGES MUST BE APPLIED BEFORE COMMENCEMENT
OF THE TEST
4HE ACTUAL DIRECTIONAL CHARACTERISTIC WITH TWO
PHASE TESTS MAY DEVIATE AGAINST THE THEORETICAL
DIRECTIONAL CHARACTERISTIC BY q 4HIS DEVIATION
IS CAUSED BY THE USE OF QUADRATURE VOLTAGES
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