/PERATING INSTRUCTIONS
3*
6
# ' #
4ESTING THE THERMAL OVERLOAD
PROTECTION
4HE OVERLOAD FUNCTION CAN ONLY BE TESTED IF IT HAS
BEEN CONFIGURED AS 4(%2-!, /,
%8)34
ADDRESS
REFER TO 3ECTION AND PARAMETERIZED AS
OPERATIVE UNDER ADDRESS
4HE BASIS CURRENT FOR THE DETECTION OF OVERLOAD IS THE
RATED CURRENT OF THE DEVICE /VERLOAD DATA ARE CALCU
LATED FOR EACH INDIVIDUAL PHASE
7HEN APPLYING THE RATED CURRENT FACTORY SETTINGS
TRIPPING MUST NOT OCCUR !FTER AN APPROPRIATE TIME
APPROXIMATELY X
Ç
A STEADY STATE TEMPERATURE
RISE ACCORDING TO THE FOLLOWING RELATIONSHIP IS ESTAB
LISHED
TRIP
K
4HIS VALUE CAN BE READ OUT IN THE OPERATIONAL MEA
SURED VALUES FOR EACH PHASE &OR DIFFERENT SETTING
VALUES K TEST CURRENT SHOULD BE LOWER THAN K X )
.
EG
4O CHECK THE TIME CONSTANT THE CURRENT INPUT IS SIM
PLY SUBJECTED TO X THE PICK UP VALUE I E X K X
)
.
4RIPPING WILL THEN BE INITIATED AFTER A TIME INTERVAL
WHICH CORRESPONDS TO HALF THE TIME CONSTANT
)T IS ALSO POSSIBLE TO CHECK THE TRIP CHARACTERISTIC &IG
URE )T MUST BE NOTED THAT BEFORE EACH MEASURE
MENT THE TEMPERATURE RISE MUST BE REDUCED TO ZERO
4HIS CAN BE ACHIEVED EITHER BY DE ACTIVATING AND
RE ACTIVATING THE OVERLOAD FUNCTION ADDRESS
OR BY BLOCKING IT OR BY OBSERVING A CURRENT FREE PERIOD
OF AT LEAST X
Ç
4EST CURRENTS LARGER THAN TIMES )
.
MAY
OVERLOAD AND DAMAGE THE RELAY IF APPLIED
CONTINUOUSLY REFER TO 3ECTION FOR
OVERLOAD CAPABILITY /BSERVE A COOLING
DOWN PERIOD
#AUTION
)F TESTING WITH PRELOAD IS PERFORMED THEN IT MUST BE
ENSURED THAT A CONDITION OF THERMAL EQUILIBRIUM HAS
BEEN ESTABLISHED BEFORE TIME MEASUREMENT COM
MENCES 4HIS IS THE CASE WHEN THE PRELOAD HAS
BEEN APPLIED CONSTANTLY FOR A PERIOD OF AT LEAST X
Ç
4ESTING THE MOTOR RESTART LOCKOUT
4HE MOTOR RESTART LOCKOUT ONLY AVAILABLE IN MODEL
3*
J JJJJ
CAN ONLY BE TESTED IF IT HAS BEEN
CONFIGURED AS -/4/2 34!24
%8)34
ADDRESS
REFER TO 3ECTION AND PARAMETERIZED AS
OPERATIVE UNDER ADDRESS
4HE TESTS CAN BE CARRIED OUT WITH SINGLE PHASE FAULT
4EST CURRENTS LARGER THAN TIMES )
.
MAY
OVERLOAD AND DAMAGE THE RELAY IF APPLIED
CONTINUOUSLY REFER TO 3ECTION FOR
OVERLOAD CAPABILITY /BSERVE A COOLING
DOWN PERIOD
#AUTION
4HE MOTOR RESTART LOCKOUT PRESUPPOSES THAT THE THER
MAL LIMIT OF THE ROTOR IS REACHED WHEN THE MOTOR HAS
BEEN STARTED JUST FOR THE PERMISSIBLE NUMBER OF
TIMES 7ITH THE PRESET PARAMETERS N
W
AND
N
C
N
W
THE MOTOR MAY BE STARTED THREE
TIMES N
C
SUCCESSIVELY
#ONSIDERING THE PRESETTINGS OF ADDRESSES
)
"
)
.
)
!
)
"
AND 4 3424 -!8
S THREE MOTOR STARTS MUST BE SIMULATED ONE
AFTER THE OTHER EACH WITH S DURATION AND WITH A
TEST CURRENT OF TIMES RATED CURRENT OF THE RELAY
4HEN THE THERMAL LIMIT VALUE MUST BE NEARLY REACHED
THE OPERATIONAL MEASURED VALUE
,
,TRIP
SHOWS
NEARLY
7HEN THE TEST CURRENT IS SWITCHED OFF THE PROTECTION
WILL ISSUE A LOCKOUT SIGNAL IE ANNUNCIATION
-30
4RIP
AND ,%$ AS DELIVERED AND SIGNAL RELAY
AS DELIVERED 4HE LOCKOUT SIGNAL DISAPPEARS AS
SOON AS ANOTHER RESTART WOULD BE PERMISSIBLE )T CAN
BE ABORTED ALSO BY SWITCHING OF THE LOCKOUT FUNCTION
OR VIA A BINARY BLOCKING INPUT NOT ALLOCATED WHEN DE
LIVERED SINCE THE THERMAL REPLICA IS THEN ERASED
.OTE
4HE MOTOR RESTART LOCKOUT OPERATES INDEPEN
DENT ON THE THERMAL OVERLOAD PROTECTION AND THE
START UP SUPERVISION 4HUS IT IS POSSIBLE THAT THE
OVERLOAD PROTECTION ANDOR THE START UP SUPERVISION
MAY TRIP BEFORE THE MOTOR START PROTECTION DOES DE
PENDENT ON THE SET PARAMETERS )F NECESSARY THE
OVERLOAD PROTECTION AND THE START UP SUPERVISION
MAY BE SWITCHED OFF OR BLOCKED BEFORE TESTING THE
START UP TIME SUPERVISION "UT DO NOT FORGET TO
SWITCH IN ON AGAIN AFTER THE TESTS WHEN IT IS TO BE
USED
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