-ETHOD OF OPERATION
3*
6
# ' #
5
, ,
5
, ,
VOLTAGES PHASE PHASE IN KI
5
, ,
LOVOLTS PRIMARY
0 1
ACTIVE AND REACTIVE POWER IN K7
OR -7 OR '7 RESP IN K6!2 OR
-6!2 OR '6!2 PRIMARY
COS
É
POWER FACTOR
F
FREQUENCY IN (Z
7P 7Q
ACTIVE AND REACTIVE ENERGY IN
K7H OR -7H OR '7H RESP IN
K6!2H OR -6!2H OR '6!2H PRI
MARY SEPARATE FOR EACH DIREC
TION
3ETTING DATE
THE DATE WHEN THE METERING
STORE HAVE BEEN SET THE LAST
TIME
TRIP,
TEMPERATURE RISES CALCULATED
TRIP,
BY THE THERMAL OVERLOAD PRO
TRIP,
TECTION AND THE RESTART LOCKOUT
TRIP
REFERRED TO THE TRIP TEMPERAT
,
,TRIP
URE RISE
)
%%A
ACTIVE COMPONENT OF THE EARTH
FAULT CURRENT IN ! PRIMARY AND
M! SECONDARY
)
%%R
REACTIVE COMPONENT OF THE
EARTH FAULT CURRENT IN ! PRIMARY
AND M! SECONDARY
/PERATION HOUR METER OPERATION STATISTICS
-ONITORING FUNCTIONS
4HE DEVICE INCORPORATES COMPREHENSIVE MONITORING
FUNCTIONS WHICH COVER BOTH HARDWARE AND SOFTWARE
FURTHERMORE THE MEASURED VALUES ARE CONTINUOUSLY
CHECKED FOR PLAUSIBILITY SO THAT THE CURRENT AND VOLT
AGE TRANSFORMER CIRCUITS ARE ALSO INCLUDED IN THE
MONITORING SYSTEM
(ARDWARE MONITORING
4HE COMPLETE HARDWARE IS MONITORED FOR FAULTS AND
INADMISSIBLE FUNCTIONS FROM THE MEASURED VALUE IN
PUTS TO THE OUTPUT RELAYS )N DETAIL THIS IS ACCOM
PLISHED BY MONITORING
!UXILIARY AND REFERENCE VOLTAGES
4HE PROCESSOR MONITORS THE OFFSET AND REFERENCE
VOLTAGE OF THE !$# ANALOGDIGITAL CONVERTER 4HE
PROTECTION IS BLOCKED AS SOON AS IMPERMISSIBLE
DEVIATIONS OCCUR 0ERMANENT FAULTS ARE ANNUN
CIATED
&AILURE OR SWITCH OFF OF THE AUXILIARY VOLTAGE AUTO
MATICALLY PUTS THE SYSTEM OUT OF OPERATION THIS
STATUS IS INDICATED BY A FAIL SAFE CONTACT 4RAN
SIENT DIPS IN SUPPLY VOLTAGE OF LESS THAN MS WILL
NOT DISTURB THE FUNCTION OF THE RELAY
-EASURED VALUE ACQUISITION
4HE COMPLETE CHAIN FROM THE INPUT TRANSFORMERS
UP TO AND INCLUDING THE ANALOGDIGITAL CONVERTERS
ARE MONITORED BY THE PLAUSIBILITY CHECK OF THE
MEASURED VALUES
)N THE
CURRENT PATH
THERE ARE FOUR OR FIVE INPUT
CONVERTERS DEPENDENT ON MODEL THE DIGITIZED
SUM OF THE OUTPUTS OF THE FOUR CURRENTS MUST AL
WAYS BE ZERO ! FAULT IN THE CURRENT PATH IS RECOG
NIZED WHEN
\I
,
I
,
I
,
K
)%
X I
%
\
35-)THRES X )
.
35-&ACT) X )
MAX
AND MODEL 3*
J JJJJ
\I
,
I
,
I
,
K
)%%
X I
%%
\
35-)THRES X )
.
35-&ACT) X )
MAX
!N ADJUSTABLE FACTOR K
)
PARAMETER )E)PH OR )EE
)PH 7$ CAN BE SET TO CORRECT THE DIFFERENT RATIOS OF
PHASE AND EARTH CURRENT TRANSFORMERS EG SUM
MATION TRANSFORMER OR WINDOW TYPE CURRENT TRANS
FORMER )F THE RESIDUAL EARTH CURRENT IS DERIVED
FROM THE CURRENT TRANSFORMER STARPOINT K
)
35-)THRES AND 35-&ACT) ARE SETTING PARAME
TERS 4HE COMPONENT 35-&ACT) X )
MAX
TAKES INTO
ACCOUNT PERMISSIBLE CURRENT PROPORTIONAL TRANS
FORMATION ERRORS IN THE INPUT CONVERTERS WHICH
MAY PARTICULARLY OCCUR UNDER CONDITIONS OF HIGH
SHORT CIRCUIT CURRENTS &IGURE
.OTE
#URRENT SUM MONITORING CAN OPERATE PROP
ERLY ONLY WHEN THE RESIDUAL CURRENT OF THE PRO
TECTED LINE IS FED TO THE )
%
AND I
%%
INPUTS OF THE
RELAY
)
&
&AULT CURRENT
35-)THRES
3LOPE
35-&ACT)
)
&
)
.
)
MAX
)
.
&IGURE #URRENT SUM MONITORING CURRENT
PLAUSIBILITY CHECK
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