Lenze g500-B - Appendix; Good to Know; Operating Modes of the Motor

Appendix
Good to know
Operang modes of the motor
In connuous operaon a motor reaches its permissible temperature limit if it outputs the
rated power dimensioned for connuous operaon. However, if the motor is only subjected to
load for a short me, the power output by the motor may be greater without the motor
reaching its permissible temperature limit. This behaviour is referred to as overload capacity.
Depending on the duraon of the load and the resulng temperature rise, the required motor
can be selected reduced by the overload capacity.
Operang modes S1 ... S10 as specied by EN 60034-1 describe the basic stress of an electrical
machine.
The most important operang modes
Connuous operaon S1 Short-me operaon S2
P
P
V
t
t
t
J
P
P
V
t
t
t
J
t
B
Operaon with a constant load unl the motor reaches the thermal
steady state. The motor may be actuated connuously with its rated
power.
Operaon with constant load; however, the motor does not reach the
thermal steady state. During the following standsll, the motor winding
cools down to the ambient temperature again. The increase in power
depends on the load duraon.
Appendix
Good to know
Operang modes of the motor
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