Configuration
4.6 Load feeders - protection against short circuit
SIRIUS 3RM1 motor starter
70
Manual, 06/2016, A5E0345285095020A/RS-AE/005
4.6.3.1
Fuseless design
Combining 3RM1 motor starters with motor starter protectors
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).
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 functions in
addition to replacing the unit.
With 3RM11 / 3RM13 Failsafe motor starters, check the safety functions after a short circuit
in the case of short-circuit protection according to type of coordination 2.
The 3RM1 motor starters can be combined with the following motor starter protectors for
short circuits according to type of coordination 1:
Table 4- 5
Motor starter protectors according to type of coordination 1 for 3RM1 motor starters with
400 V
Motor starter T
A
= 40 °C
Short-circuit
current
Maximum permitted motor starter
protectors
for 400 V + 10%
Article number
Rated current [A]
Current [kA]
Article number
Rated current [A]
3RM1...
0.5 / 2.0 / 7.0
55
3RV2011-1HA..
8
3RM1...
0.5 / 2.0 / 7.0
12.5
3RV2011-1KA..
12.5
3RM1...
0.5 / 2.0 / 7.0
10
3RV2021-4AA..
16
3RM1...
0.5 / 2.0 / 7.0
7.5
3RV2021-4BA..
20
3RM1...
0.5 / 2.0 / 7.0
5
3RV2021-4DA..
25
Table 4- 6
Motor starter protectors according to type of coordination 1 for 3RM1 motor starters with
500 V
Motor starter T
A
= 40 °C
Short-circuit
current
Maximum permitted motor starter
protectors
for 500 V + 10%
Article number
Rated current [A]
Current [kA]
Article number
Rated current [A]
3RM1.01…
0.5
10
3RV2011-1HA..
8
3RM1.02…
2.0
10
3RV2011-1HA..
8
3RM1.07…
7.0
10
3RV2011-1HA..
8