illustrated below.
Example:
According to EN 50123 for fixed installations
IEC 61992-1/61992-2:
The mechanical response time consists of the measurement of the over-current trigger and the reaction of
the over-current release device opening the main contact.
Abbreviations:
Iss
Prospective sustained short circuit current
Îss
Peak of Iss
Icut off
Cut off current
Id
Setting of maximum current release
I
ds
: Current direct setting
di/dt
Initial current rate of rise
UNe
Rated voltage
Ûarc
Maximum arc voltage
tb
Total break time
tc
Time-constant of the circuit
tl
Mechanical response time
Select ‘Opening Time Test’ in the ‘Manual Mode’ menu.
The following dialog is displayed:
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Operation
