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6LE007331A
An inverse time function I²t = K can be activated or deactivated when adjusting the short time
delay.
This I²t function makes it possible to improve selectivity with downstream devices. It is
activated from the Isd pick-up and functions up to 10xIr.
I (A)
t (s)
10xlr
tsd
l²t
lr
lsd
Short time delay protection I²t
The types of protection device
3.3 Short Time Delay protection