-ETHOD OF OPERATION
3$
6
# ' #
-ETHOD OF OPERATION
/PERATION OF COMPLETE UNIT
4HE NUMERICAL LINE DIFFERENTIAL PROTECTION 3$ IS
EQUIPPED WITH A POWERFUL AND PROVEN BIT MICRO
PROCESSOR 4HIS PROVIDES FULLY DIGITAL PROCESSING OF
ALL FUNCTIONS FROM DATA ACQUISITION OF MEASURED VAL
UES TO THE TRIP SIGNALS FOR THE CIRCUIT BREAKERS
&IGURE SHOWS THE BASE STRUCTURE OF THE UNIT
4HE SUMMATION TRANSFORMER -4 FORMS UNDER SYM
METRICAL CURRENT CONDITIONS A M! SINGLEPHASE
MIXED CURRENT FROM THE INPUT CURRENTS OF THE THREE
PHASES )TS WINDINGS RATIO ENSURES THAT WITH
ANY KIND OF FAULT THE SECONDARY MIXED CURRENT WILL
HAVE A DEFINED PROPORTION TO THE FAULT CURRENT 4HIS
CURRENT IS USED FOR ALL PROTECTION FUNCTIONS
#ONTROL CENTRE
OPTIONAL
-3
-4
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SIGNAL OUT
PUTS CAN BE
MARSHALLED
,%$ CAN BE
MARSHALLED
OR X
TRIP RELAYS CAN
BE MARSHALLED
0ERSONAL
COMPUTER
/PERATOR
PANEL
OR BINARY
INPUTS CAN BE
MARSHALLED
0OWER
SUPPLY
3ERIAL
INTERFACE
3ERIAL
INTERFACE
"LOCKED
3ERVICE
,#$ DISPLAY
X CHARAC
TERS
0ILOT WIRE
CONNECTION TO
THE OPPOSITE
LINE END
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A
&IGURE
(ARDWARESTRUCTURE OF LINE DIFFERENTIAL PROTECTION RELAY 3$
Содержание 7SD502
Страница 148: ... PPENDIX 3 6 PPENDIX ENERAL DIAGRAMS ONNECTION DIAGRAMS 4ABLES ...
Страница 176: ... 3 6 ...