Siemens SIPROTEC 7UT613 series Manual page 466

4 Technical Data
Frequency Influence referring to k · I
Characteristic
466
N
Frequency in range 0.9 ≤ f/f
1.1
Figure 4-18 Trip time characteristic of thermal overload protection
τ
Tripping time
τ
Thermal time constant
I
Load current
I
Previous load current
pre
k Setting factor according to IEC 60255-8
I
Rated current of protected object
Nom
≤
1 % at f = 50 / 60 Hz
N N
3 % at f = 16.7 Hz
N
7UT613/63x Manual
C53000-G1176-C160-2