Configuration
4.6 Load feeders - protection against short circuit
SIRIUS 3RM1 motor starter
72
Manual, 06/2016, A5E0345285095020A/RS-AE/005
Combining 3RM1 motor starters with fuses for type of coordination 1
DANGER
Hazardous voltage at the motor
Will cause death, serious injury, or damage to property.
The safety function must be checked after every tripping of the motor starter protector (also
in the case of overload).
After every short circuit in the case of short-circuit protection according to type of
coordination 1, a 3RM1 motor starter is defective.
Replace a 3RM1 motor starter including the terminals after a short circuit in the case of
short-circuit protection according to type of coordination 1.
With 3RM11/3RM13 Failsafe motor starters, you must check the safety function in addition
to replacing the unit.
The 3RM1 motor starters can be combined with the following fuses for short circuits of 55 kA
according to type of coordination 1:
Table 4- 8
Fuses according to type of coordination 1 for 3RM1 motor starters
Motor starter T
A
= 40 °C
Maximum permitted fuse links
for 500 V + 10 %
DIAZED operating class gG
Rated current [A]
Article number
Rated current [A]
3RM1.01…
0.5
5SB281 / 3NW6010-1
25
3RM1.02…
2.0
5SB281 / 3NW6010-1
25
3RM1.07…
7.0
5SB281 / 3NW6010-1
25
Combining 3RM1 motor starters with fuses for type of coordination 2
DANGER
Hazardous voltage at the motor
Will cause death, serious injury, or damage to property.
Health hazard from automatic hot restart.
The safety function must be checked after every tripping of the motor starter protector (also
in the case of overload).
With 3RM11/3RM13 Failsafe motor starters, check the safety function after a short circuit in
the case of short-circuit protection according to type of coordination 2.
