Winco DSE7300 Series - Manual (Page 104)

DSE7200 / 7300 Series Operators Manual
104
8.9 SHORT CIRCUIT ALARM
If the Short Circuit alarm is enabled, the controller begins following the IDMT ‘curve’. If the Trip is surpassed for an
excess amount of time the Alarm triggers (Shutdown or Electrical trip as selected in Action).
The higher the Short Circuit, the faster the trip. The speed of the trip is dependent upon the fixed formula :
T = K x 0.14 / ((I / I
s
)
0.02
-1)
Where:
T is the tripping time in seconds (accurate to +/- 5% or +/- 50ms (whichever is the greater)
K is the time multiplier setting
I is the actual current measured
Is is the trip setting value
The settings shown in the example above are a screen capture of the DSE factory settings, taken from the DSE
Configuration Suite software.
I
S
(Trip setting
value)
K (time multiplier setting)