Configuration
4.3 Load feeders - protection against short circuit
SIRIUS 3RM1 motor starter
Manual, 11/2013, A5E0345285095020A/RS-AB/002
63
4.3.4.3
Fuses and circuit breakers
Fuse data for motor starters
DANGER
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
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 after a short circuit and check the safety function of
3RM11/3RM13 Failsafe motor starters.
Standard short circuit according to UL 508 for 460 V + 5 %
Table 4- 8
Fuses for protecting against short-circuit currents
Motor starter T
A
=
50 ℃
Short-circuit
current
Fuse
Order number
Rated current [A] [kA]
Type
Max. size [A]
3RM1.01…
0,5
1
RK 5
8
3RM1.02…
2,0
1
RK 5
8
3RM1.07…
6,1
5
RK 5
30
High fault according to UL 508 for 460 V + 5 %
Table 4- 9
Fuses for protecting against high short-circuit currents
Motor starter T
A
=
50 ℃
Short-circuit
current
Fuse
Order number
Rated current [A] [kA]
Type
Max. size [A]
3RM1.01…
0,5
100
CLASS J
50
3RM1.02…
2,0
100
CLASS J
50
3RM1.07…
6,1
100
CLASS J
50
