Siemens SIPROTEC 7SJ531 - Page 32

4ECHNICAL DATA3*
6
#
' #

$IRECTION DETERMINATION FOR PHASE FAULTS
-EASUREMENT METHOD PHASE CURRENT POLARIZED WITH QUADRATURE VOLTAGES
WITH MEMORIZED VOLTAGE MEMORY DEPTH  AC
PERIODS IF POLARIZING VOLTAGES TOO SMALL
&ORWARDS AREA  TO 
IF QUADRATURE VOLTAGE IS RECTANGULAR WITH RESPECT
TO THE FAULT VOLTAGE
$IRECTIONAL SENSITIVITY UNLIMITED FOR SINGLE
PHASE AND TWO PHASE FAULTS
FOR THREE
PHASE FAULTS DYNAMICALLY UNLIMITED
STEADY
STATE APPROX  6 PHASE TO PHASE
$IRECTION DETERMINATION FOR EARTH FAULTS
-EASUREMENT METHOD EARTH CURRENT POLARIZED WITH DISPLACEMENT VOLTAGE
&ORWARDS AREA  TO 
$IRECTIONAL SENSITIVITY APPROX  6 DISPLACEMENT VOLTAGE
4OLERANCES AND INFLUENCING VARIABLES
!NGLE ERROR UNDER REFERENCE CONDITIONS
FOR PHASE FAULTS q  ELECTRICAL
FOR EARTH FAULTS q  ELECTRICAL IF 5
EN
VOLTAGE CONNECTED
q
ELECTRICAL IF 5
EN
VOLTAGE IS CALCULATED
&REQUENCY DEPENDENT INFLUENCE
WITH NON MEMORIZED VOLTAGE APPROX  IN THE RANGE   FF
.
 
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