Siemens SIRIUS 3RA

3.2.2 Self-assembled load feeders
Assembly of load feeders from individual devices
Self-assembly load feeders comprising individual devices are available as an alternative to the
3RA2 complete device. In the case of a discrete con󹪝guration of individual devices without a link
module, the values of the basic devices apply. The following components can be combined via
the intermediary of a link module.
Combination S00 S0 S2 S3
Motor starter protector
and contactor
7.5 kW (16 A) 15 kW (32 A) 30 / 37 kW (65 A) 55 kW (100 A)
1)
Motor starter protector
and soft starter
7.5 kW (16 A) 15 kW (32 A) 30 / 37 kW (65 A)
1)
On request
Motor starter protector
and solid-state contactor
— 7.5 kW (16 A) — —
1)
A DIN rail adapter shall be used for this combination
The modularity of the SIRIUS system means that the standard devices are perfectly matched
from both a mechanical and an electrical point of view. As a straightforward means of
assembling starter combinations, wiring kits are available for contactor assemblies for reversing
and star-delta (wye-delta) start for size S2 / S3 with screw terminals, and for size S00 / S0 with
various connection systems. Assembly kits are available for mounting self-assembled load
feeders on DIN rails or busbars.
Assembly of three-part combinations with link module between the motor starter protector and
the contactor
You are basically advised to refrain from setting up combinations of a motor starter protector, a
contactor and an overload relay or a monitoring relay as a completely assembled three-part
combination. If this should nevertheless be necessary, the following restrictions apply:
Motor starter protector + contactor + electronic overload relay / 3RR monitoring relay
(size S00 / S0)
Thermal restrictions Mechanical restrictions
No restrictions DIN rail adapter required
Motor starter protector + contactor + electronic overload relay / 3RR monitoring relay
(size S2)
Thermal restrictions Mechanical restrictions
• At an ambient temperature of T
a
= 40 °C
(no restrictions)
• At an ambient temperature of T
a
= 60 °C
(clearance between the load feeders: ≥ 10 mm)
No restrictions
Product description
3.2 Device versions
SIRIUS 3RA Load Feeders
Equipment Manual, 02/2022, A5E03656507520A/RS-AC/004 19