)NTRODUCTION3*
6
#
' #
4HE FOLLOWING FEATURES OF EARTH FAULT DETECTION ONLY IN
MODEL 3* J
JJJJ JJJJ
TWO STAGE EARTH CURRENT DETECTION HIGH VALUE
STAGE )
%%
AND LOW VALUE STAGE )
%%
CAN BE SET INDEPENDENT OF THE OVERCURRENT TIME
PROTECTION STAGES FOR HIGHLY SENSITIVE EARTH FAULT
DETECTION SMALLEST PICK
UP VALUE !
LOW VALUE STAGE WITH INVERSE TIME LAG OR SELECT
ABLE DEFINITE TIME LAG
A USER DEFINED INVERSE TIME CHARACTERISTIC CAN BE
DEFINED
EACH STAGE CAN BE SET DIRECTIONAL FORWARDS OR RE
VERSE OR NON
DIRECTIONAL
ADJUSTABLE DIRECTIONAL CHARACTERISTIC
CAN BE SET TO TRIP OR TO ALARM ONLY
COMPENSATION OF CURRENT TRANSFORMER ANGLE ERROR
WHEN USED IN COMPENSATED SYSTEMS
$EAD
FAULT PROTECTION
PROVIDES HIGH SPEED OPERATION WHEN SWITCHING
MANUALLY ONTO A BOLTED FAULT
!UTOMATIC RECLOSE FUNCTION
SINGLE OR MULTI SHOT EG 2!2 AND $!2
WITH SEPARATELY ALLOCATED ACTION TIMES FOR 2!2
RAPID !2 FOR FIRST SHOT AND $!2 DELAYED !2 FOR
FURTHER SHOTS
WITH SEPARATELY ALLOCATED DEAD TIMES FOR 2!2
RAPID !2 FOR FIRST SHOT AND $!2 DELAYED !2 FOR
FURTHER SHOTS INDIVIDUALLY AFTER SINGLE
PHASE
FAULT AND AFTER MULTI
PHASE FAULTS
SELECTION CAN BE MADE WHICH OF THE OVERCURRENT
AND EARTH FAULT STAGES DO OPERATE WITH !2 AND
WHICH DO NOT
$ISTANCE
TO FAULT LOCATION
CAN BE STARTED BY FAULT DETECTION OF OVERCURRENT
TIME PROTECTION TRIP COMMAND OR BY EXTERNAL
COMMAND
CALCULATION OF THE FAULT DISTANCE AND OUTPUT OF THE
FAULT DISTANCE IN /HMS SECONDARY AN KILOMETERS
OR MILES
#IRCUIT BREAKER FAILURE PROTECTION
CURRENT MONITORING ANDOR PROCESSING OF THE
BREAKER AUXILIARY CONTACTS
INITIATION BY EACH OF THE INTEGRATED PROTECTION
FUNCTIONS WHICH LEAD TO TRIP
INITIATION POSSIBLE FROM EXTERNAL PROTECTION DEVICE
VIA BINARY INPUT
INITIATION POSSIBLE FROM INTEGRATED BREAKER CON
TROL
5NBALANCED LOAD PROTECTION
PROCESSING OF THE NEGATIVE SEQUENCE COMPONENT
OF THE CURRENTS
TWO STAGE TRIP CHARACTERISTIC
4HERMAL OVERLOAD PROTECTION
PROVIDES THERMAL REPLICA OF THE CURRENT HEAT LOSSES
WITH TOTAL MEMORY
TRUE RMS MEASUREMENT OF ALL THREE CONDUCTOR
CURRENTS
ADJUSTABLE THERMAL WARNING STAGE
ADJUSTABLE CURRENT WARNING STAGE
ADJUSTABLE COOLING DOWN FACTOR POSSIBLE FOR USE
ON MOTORS
3TART
UP TIME MONITOR FOR USE ON MOTORS
CURRENT DEPENDENT TRIP TIME BY PROCESSING OF THE
START
UP CURRENT OF THE MOTOR
CURRENT INDEPENDENT DELAY TIME WHEN THE ROTOR IS
LOCKED
2ESTART LOCKOUT FOR MOTORS OPTIONAL
APPROXIMATION OF THE ROTOR TEMPERATURE RISE
RELEASE OF RESTART OF THE MOTOR ONLY BELOW A SELECT
ABLE RESTART LIMIT
CONSIDERATION OF THE SHUT DOWN PROCEDURE AND
REDUCED COOLING EFFECT DURING STAND
STILL
LOCKOUT CAN BE AVOIDED FOR EMERGENCY RUN UP OF
THE MOTOR
ONLY FOR MODEL 3*J JJJJ JJJJ
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