Siemens SIRIUS 3RW55 - Page 113

Functions
7.4 Motor protection
SIRIUS 3RW55 soft starter
Manual, 08/2018, A5E35630887002A/RS-AB/002
113
Parameters
WARNING
Automatic restart following fault acknowledgement/restart.
Will cause death or serious injury.
The 3RW55 soft starter immediately continues to operate with the values specified by the
control following fault acknowledgement/restart. Outputs are activated when the ON
condition is met.
Take appropriate measures (e.g. start key with monitored start) to prevent unintentional
restarting and to ensure a defined start of the system.
Parameters
Description
Temperature sensor
•
Deactivated
(factory setting)
The motor protection function is deactivated.
•
Thermoclick
This type of sensor describes a temperature-dependent switch.
•
PTC - Type A
This type of sensor describes a temperature-dependent resistor.
Response to overload
temperature sensor
If the temperature sensor detects an overload on the motor, this is
signaled to the soft starter. You can set the response to this:
•
Trip without restart
(factory setting)
If the temperature is exceeded, an error message is generated
and the motor is tripped. After the motor has cooled down, the
error message and the trip can be acknowledged with the "Reset"
function.
•
Trip with restart
If the temperature is exceeded, an error message is generated
and the motor is tripped. After the motor has cooled down, the
error message and the motor trip are automatically canceled.
•
Warn
If a specific limit value is exceeded, only a warning message is
issued. If the value falls below this limit again, the warning
message is automatically retracted.