/PERATING INSTRUCTIONS
3*
6
# ' #
4ESTING THE UNBALANCED LOAD PRO
TECTION
IF AVAILABLE
4HE UNBALANCED PROTECTION CAN ONLY BE TESTED IF THIS
FUNCTION HAS BEEN CONFIGURED IN ADDRESS AS
.%' 3%1
%8)34
AND PARAMETERIZED AS OPERATIVE
.%' 3%1
/.
ADDRESS
4HE UNBALANCED LOAD PROTECTION HAS TWO DEFINITE
TIME DELAY STAGES ) 4) AND ) 4)
4ESTING CAN BE PERFORMED WITH SINGLE PHASE TWO
PHASE OR THREE PHASE TEST CURRENT )N THE FOLLOWING
TESTING WITH A THREE PHASE CURRENT WITH SWOPPED
PHASES DESCRIBED EG , WITH , )N THIS CASE THE
UNBALANCED LOAD AMOUNTS TO THE TEST CURRENT WHICH
IS REFERRED TO THE UNIT CURRENT
#AUTION
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
7HEN THE PICK UP VALUE IS EXCEEDED TEST CURRENT
SETTING VALUES THE ASSOCIATED ANNUNCIATIONS
)
&AULT
AND
) &AULT
,%$ DEVICE FAULT DE
TECTION AND SIGNAL RELAY AT DELIVERY MUST BE INDI
CATED !FTER THE ASSOCIATED TIME DELAY HAS EXPIRED
4 ) S AT DELIVERY 4 ) S AT DELIVERY TRIP
ANNUNCIATION
) 4RIP
IS ISSUED ,%$ AND SIGNAL
RELAY AT DELIVERY #HECK THAT THE TRIP CONTACTS
CLOSE
)T MUST BE NOTED THAT THE SET TIMES ARE PURE DELAY
TIMES OPERATING TIMES OF THE MEASUREMENT FUNC
TIONS ARE NOT INCLUDED
4ESTING THE START UP TIME SUPER
VISION
IF AVAILABLE
4HE START UP TIME SUPERVISION CAN ONLY BE TESTED IF IT
HAS BEEN CONFIGURED AS 34!24 3506
%8)34
AD
DRESS REFER TO 3ECTION AND PARAMETER
IZED AS OPERATIVE UNDER ADDRESS
4ESTING CAN BE PERFORMED WITH SINGLE PHASE TWO
PHASE OR THREE PHASE TEST CURRENT 4ESTS SHOULD BE
CARRIED OUT DYNAMICALLY BECAUSE OF THE HIGH START
UP CURRENTS
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
&OR TEST CURRENTS ABOVE X )
.
MEASUREMENT SHALL BE
PERFORMED DYNAMICALLY )T SHOULD BE STATED THAT THE
RELAY PICKS UP AT TIMES SETTING VALUE ) 3424
-!8 AND DOES NOT PICK UP AT TIMES SETTING VALUE
) 3424 -!8
4HE TRIPPING TIME DEPENDS ON THE SET START UP TIME
4 3424 350 THE SET START UP CURRENT ) 3424
-!8 AND THE TEST CURRENT )
RMS
)T CAN BE CALCULATED
FROM THE FORMULA
FOR )
RMS
)
3424 $%4
T
)
3424-!8
)
RMS
4
3424350
)T IS SUGGESTED THAT ONE POINT OF THE TRIP TIME CHARAC
TERISTIC IS CHECKED &OR EXAMPLE THE PRESET VALUES
)
3424 -!8
X )
.
4
3424 350
S AND THE PICK
UP THRESHOLD )
3424 $%4
X )
.
ADDRESS RE
SULT IN A TRIPPING TIME OF S WHEN THE TEST CURRENT
AMOUNTS TO X SET VALUE TIME )
.
4RIP IS ANNUN
CIATED WITH
3424 350 TRIP
.OTE
4HE START UP SUPERVISION OPERATES INDEPEN
DENT ON THE THERMAL OVERLOAD PROTECTION AND THE MO
TOR START PROTECTION 4HUS IT IS POSSIBLE THAT THE OVER
LOAD PROTECTION ANDOR THE MOTOR START PROTECTION
MAY TRIP BEFORE THE START UP TIME SUPERVISION DOES
DEPENDENT ON THE SET PARAMETERS )F NECESSARY THE
OVERLOAD PROTECTION AND MOTOR START PROTECTION 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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