Siemens SIRIUS 3RA, Equipment Manual

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Product description
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3.1 Overview
Fuseless load feeders
Fuseless load feeders are device combinations comprising a 3RV motor starter protector for
overload and short-circuit protection and a 3RT contactor for normal switching. The SIRIUS
portfolio features two different configuration options for fuseless load feeders.
• 3RA2 tested pre-assembled complete devices (sizes S00 to S2 only)
• Tested combinations of individual devices
3.2 Device versions
The modular standard components in the SIRIUS modular system are ideally matched and
support the simple configuration of fuseless load feeders. The load feeders are also available as
3RA2 complete devices.
Both options are characterized by the following features.
• Type of coordination 1 or 2
• Rated control supply voltage
• Mounting on busbar or DIN rail
• Screw or spring-loaded connection
A detailed overview of the fuseless load feeders product range appears below.
Types of coordination
Fuseless load feeders up to 38 A (discrete configuration of individual devices with connecting
cables) and 32 A (pre-assembled complete devices or configuration with link module) can be
assembled in sizes S00 and S0.
An assembly up to 80 A (discrete configuration of individual devices with connecting cables) and
65 A (as pre-assembled complete devices, or configuration with link module) is possible in
size S2.
An assembly up to 100 A (discrete configuration of individual devices with connecting cables) is
possible in size S3.
SIRIUS 3RA Load Feeders
Equipment Manual, 02/2022, A5E03656507520A/RS-AC/004
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