Functions
2.7 Thermal Overload Protection 49
SIPROTEC, 7SJ61, Manual
C53000-G1140-C210-1, Release date 02.2008
132
Example:
Machine: I
Nom Mach
= 483 A
I
max Mach
=1.15 I
Nom
at Θ
K
= 40 °C
Θ
Nom Mach
= 93 °C Temperature at I
Nom Mach
τ
th
= 600 s (thermal time constant of the machine)
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.
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