Basler Electric DECS-400 - Manual (Page 53)

9369700990 Rev R 41
n
NOMINAL
MEASURED
T
T
Hz V
Hz V
D
T






−
=
1
/
/
100
× × =
FST
E
D T T
R R
Where:
T
T
= time to trip
T
R
= time to reset
D
T
= time dial trip
D
R
= time dial, reset
E
T
= elapsed time
n = curve exponent (0.5, 1, 2)
FST = full scale trip time (T
T
)
E
T
/FST = fraction of total travel toward trip that integration had progressed to. (After a trip, this
value will be equal to 1.)
Figure 9. V/Hz Characteristic—Time Shown on Vertical Axis
DECS-400 Functional Description