19
6LE007331A
Instantaneous protection is designed to protect against high short circuit currents. This
protection is time-independent.
Instantaneous protection curve
I (A)
t (s)
I
li
Instantaneous protection
Instantaneous protection parameters
I
Ii (x In)
Instantaneous protection threshold
Adjusting the Ii pick-up setting
The Ii pick-up is adjusted using the li adjustment dial.
li pick-up adjustment range (x In)
OFF
1.5
2.0
3.0
4.0
6.0
8.0
10.0
12.0
15.0
The li pick-up tolerance for instantaneous protection is ±15%.
Trigger time
Instantaneous protection has no adjustable time delay.
The non-tripping time is 20 ms.
The maximum tripping time is 80 ms.
The maximum breaking time is 100 ms.
The types of protection device
3.4 Instantaneous protection
