Description
3.5 Functions
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
33
Control cabinet degree of protection in hazardous areas
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
The 3RM1 motor starter is not suitable for installation in hazardous areas.
The device must be installed in a control cabinet with the minimum degree of protection of
IP 4x.
Equipment protection
In addition to the motor protection function, the 3RM1 motor starters also protect themselves
against overload. This means that in the case of 3RM1 motor starters with a rated
operational current of 7 A, an overload trip may occur in the upper current range before the
motor protection trips.
If, for example, 8-fold current flows in the case of an unloaded motor memory module and a
set current of 7 A, tripping takes place after approximately one second.
You will find the tripping characteristic in the chapter "Overload protection/device protection
characteristic (Page 125)".
Setting the rated motor operational current
Set the 3RM1 motor starter to the rated motor operational current (according to the type
plate or design test certificate of the motor).
On this topic, refer to the Chapter "Setting the rated operational current (Page 100)".
Note
Observe the trip class or the tripping characteristic of the 3RM1 motor starter in Chapter
"Overload protection/device protection characteristic (Page 125)". The motor and cables
must be designed for the selected trip class.
RESET settings
Note
Restriction in the hazardous area
In applications for the protection of motors in hazardous areas, a 3RM11/3RM13 Failsafe
motor starter may only be operated with the "Manual RESET" setting. The "RESET Mode"
LED must be off.
