Siemens SIPROTEC 7SJ61 Manual page 132

Functions
2.7 Thermal Overload Protection 49
Example:
Machine: I
Nom Mach
=1.15 I
I
max Mach
Θ
= 93 °C Temperature at I
Nom Mach
τ
= 600 s (thermal time constant of the machine)
th
Current transformer: 500 A / 1 A
Motor Starting Recognition
The motor starting is detected when setting I MOTOR START at address 1107 is exceeded. Information on
how to perform the configuration is given under "Recognition of Running Condition (only for motors)" in
Subsection2.1.3.2.
132
= 483 A
at Θ
= 40 °C
Nom K
Nom Mach
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008