)NTRODUCTION
3*
6
# ' #
5NDERCURRENT SUPERVISION
ALARM WHEN THE OPERATIONAL CURRENT FALLS BELOW A
SELECTABLE VALUE EG FOR MOTORS
6OLTAGE PROTECTION
TWO STAGE UNDERVOLTAGE PROTECTION WITH ADDI
TIONAL START UP THRESHOLD
OPTIONAL CURRENT CRITERION PROVIDES ADDITIONAL RE
LEASE CONDITION
INDEPENDENT OVERVOLTAGE DETECTION
#ONTROL OF SWITCHING DEVICES
-ANUAL CLOSING AND OPENING OF SWITCHING DEVICES
VIA SEPARATE OPERATING KEYS VIA BINARY INPUTS VIA
THE SYSTEM INTERFACE EG FROM ,3! OR VIA THE OP
ERATION INTERFACE BY MEANS OF A PERSONAL COMPUT
ER AND THE COMMUNICATION PROGRAM $)'3)
Q
FEEDBACK OF THE SWITCHING STATES VIA THE SWITCHES
AUXILIARY CONTACTS
INDICATION OF THE MOMENTARY SWITCHING STATE OF ALL
SWITCHING DEVICES IN A FEEDER MIMIC DIAGRAM
5SER DEFINABLE ANNUNCIATIONS
FOUR ANNUNCIATIONS CAN BE COUPLED INTO THE RELAY
VIA BINARY INPUTS FROM EXTERNAL PROTECTION OR SU
PERVISION DEVICES AND CAN BE INCLUDED INTO THE
ANNUNCIATION PROCESSING
EACH USER DEFINED ANNUNCIATION CAN BE OPTIONALLY
ALLOCATED TO TRIP RELAYS
4RIP CIRCUIT SUPERVISION
DETECTION OF INTERRUPTIONS OR SHORT CIRCUITS IN THE
TRIP CIRCUIT DETECTION OF FAULT IN THE MECHANICAL
SYSTEM OF THE BREAKER AND CONTROL VOLTAGE FAILURE
4HE STANDARD FUNCTIONS ALSO INCLUDE
CONTINUOUS SELF MONITORING RIGHT FROM THE DC
CIRCUITS THROUGH THE CURRENT AND VOLTAGE TRANS
FORMER INPUTS TO THE TRIPPING RELAYS THUS ACHIEV
ING MAXIMUM AVAILABILITY AND A MORE CORRECTIVE
THAN PREVENTIVE MAINTENANCE STRATEGY
MEASUREMENT AND TEST ROUTINES UNDER NORMAL
LOAD CONDITIONS
MEASUREMENT OF LOAD CURRENTS AND OPERATING VOLT
AGES
MEASUREMENT OF POWER CALCULATION OF POWER FAC
TOR AND FREQUENCY
METERING OF ACTIVE AND REACTIVE ENERGY
CALCULATION OF THERMAL OVERLOAD
PHASE SEQUENCE CHECKS
ANNUNCIATION STORAGE AND TRANSMISSION OF THE LAST
EIGHT NETWORK FAULTS WITH REAL TIME CLOCK
STORAGE OF DATA OF THE LAST THREE EARTH FAULTS IN ISO
LATED OR ARC COMPENSATED SYSTEMS
SPONTANEOUS FAULT INDICATIONS IN THE FRONT DISPLAY
AFTER A SYSTEM FAULT
DATA STORAGE AND TRANSMISSION FOR FAULT RECORDS
GIVING
RAPID FAULT ANALYSIS
DETAILED FAULT RECORDS
COUNTING OF TRIPPING AND CLOSING COMMANDS
ELAPSED HOUR METER
METERING THE OPERATING
TIME OF THE PROTECTED OBJECT UNDER LOAD
ACTIVE STATUS INDICATIONS OF THE DEVICE OR THE PLANT
CAN BE READ OFF IN THE DISPLAY STATUS INDICATIONS
COMMISSIONING AIDS SUCH AS CONNECTION VERIFICA
TION AND CIRCUIT BREAKER LIVE TEST
ONLY FOR MODEL 3*
J JJJJ
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