34
6LE007331A
In our example, the circuit breaker rating is 1600 A and Ir = 736 A.
Example of Isd current setting
Isd = 8 x Ir = 8 x 736 = 5888 A
t (sec)
l
0
(A)
Isd
Characteristic of the affected curve
Protection settings
4.3 Short time delay (STD) protection setting
WARNING
Risk of unexpected operation.
This example is given for information only to show the behaviour of the display and protection
curve.
The trip unit must be adjusted according to the results of the network study and calculation.
Hager cannot be held responsible for the incorrect adjustment of an electronic trip unit in its
installation.
