Configuration
4.6 Load feeders - protection against short circuit
SIRIUS 3RM1 motor starter
74
Manual, 06/2016, A5E0345285095020A/RS-AE/005
Circuit breakers for protecting against short-circuit currents
DANGER
Hazardous voltage at the motor
Will cause death, serious injury, or damage to property.
Health hazard from automatic hot restart.
The 3RM1 motor starter and the safety function must be checked after every tripping of the
motor starter protector (also in the case of overload).
Replace a defective 3RM1 motor starter including the terminals after a short circuit. With
3RM11 / 3RM13 Failsafe motor starters, you must check the safety functions in addition to
replacing the unit.
Standard short circuit according to UL 508 for 460 V + 5 %
Table 4- 10 Circuit breakers for protecting against short-circuit currents
Motor starter T
A
= 50 °C
Short-circuit current Circuit breaker
Article number Rated current [A]
[kA]
Type
Max. size [A]
3RM1.01...
0.5
1
3RV2711
6.3
3RM1.02...
2.0
1
3RV2711
6.3
3RM1.07...
6.1
5
3RV2711 / 2721
22
High SCCR according to UL 508 for 460 V + 5 %
Table 4- 11 Circuit breakers for protecting against high short-circuit currents
Motor starter T
A
= 50 °C
Short-circuit current Circuit breaker
Article number Rated current [A]
[kA]
Type
Max. size [A]
3RM1.01…
0.5
65
3RV2711
2.5
3RM1.02…
2.0
65
3RV2711
2.5
3RM1.07…
6.1
18
3RV2711
10
