!PPENDIX
3*
6
# ' #
4HE RESULTS FOR THE
START UP TIME SUPERVISION
3TART UP CURRENT
)
3424
)
.
START UP CURRENT
RATED CT CURRENT
!
!
)
.
7ITH REDUCED VOLTAGE THE START UP CURRENT IS EQUALLY REDUCED 4HE START UP CURRENT AT RATED VOLTAGE WILL
BE IN THIS EXAMPLE
|
)
3424
|
)
.
4HE THRESHOLD FOR START UP DETECTION MUST LIE ABOVE THE MAXIMUM LOAD CURRENT AND BELOW THE MINIMUM START
UP CURRENT )F NO FURTHER INFLUENCES ARE CONSIDERED THE THRESHOLD ADDRESS CAN BE SET TO A MEAN VALUE
BETWEEN THE MENTIONED LIMITS
4HE CONTINUOUS PERMISSIBLE CURRENT
!
!
)
.
)
3424$%4
)
.
)
.
¹
)
.
7ITH OTHER CONDITIONS THAN THE RATED CONDITIONSTHE TRIPPING TIME OF THE START UP PROTECTION WILL CHANGE
7ITH RATED VOLTAGE AND RATED START UP CURRENT THE TRIPPING TIME WOULD BE
4
TRIP
)
!.,
)
4
3424 MAX
4
TRIP
!
!
S
S
&OR
MOTOR RESTART LOCKOUT
THE FOLLOWING ADDITIONAL DATA SHOULD BE STATEDV
0ERMISSIBLE NUMBER OF STARTUPS
WITH COLD MOTOR
N
C
WITH HOT MOTOR
N
W
"ETWEEN TWO STARTUPS A PAUSE DURATION OF MINUTE IS NECESSARY
4HIS RESULTS IN THE FOLLOWING SETTINGS FOR RESTART LOCKOUT
SELECTED SETTING VALUE )
!
)
"
SELECTED SETTING VALUE )
"
)
.
N
W
N
C
N
W
)
!
)
"
!
!
)
"
)
.
!
!
4HE THERMAL REPLICA OF THE ROTOR CALCULATES THE ROTOR TEMPERATURE RISE
ROTOR
4HE FOLLOWING IS VALID
K
ROTOR
N
C
N
C
N
W
K
ROTOR
Ç
ROTOR
N
C
N
W
4
3424
LN
)")!
S
LN
! !
S
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