Standard SIRIUS modular components are optimally harmonized with one another and can be easily combined with common accessories. These are benefits that our well-proven modular SIRIUS system can offer you for the simple configuration of load feeders. SIRIUS includes everything that you require for switching, protecting and starting motors and systems. Only seven frame sizes cover the complete power range up to 500HP at 600V.

Siemens is continually improving and expanding the modular SIRIUS system in order to cost effectively meet all of the requirements from the field. The individual components distinguish themselves thanks to their space-saving design and high degree of flexibility. Engineering, mounting, wiring and maintenance are extremely simple and fast. Whether you wish to configure load feeders using circuit-breakers or overload relays, contactor or soft starter – our modular SIRIUS system offers the optimum product for each and every application.

Advantages of the modular SIRIUS system at a glance:

Load Feeders: Up to 500HP at 600VAC can be simply realised using standard devices.
Modular Design: Everything fits together and can be combined as required.
Versions and Sizes: Cost-effective and flexible using 7 compact sizes.
Accessories: Optimum degree of variance using standard accessories for all devices.
Assembly: Fast commissioning, short assembly times, simple wiring.
Communications: Can be connected to AS-Interface and PROFIBUS-DP.
Service/Maintenance: Reliable performance with extremely long service life and low maintenance.
Spring-Loaded Technology: Fast, vibration-proof and maintenance free terminals
Design: Clear, ergonomical design has received the iF Product Design Award.
Environmental Issues: Environmentally-compatable production and materials, can be recycled.
Approvals: Approved and certified worldwide such as UL, CSA, CE, CCC, marine engineering.
Mounting: Screwed or snapped on for permanent, safe and reliable mounting.

When it comes to load feeders, a fundamental question arises as to whether they should have fuses or no fuses. The SIRIUS system allows fuseless combinations to be configured using circuit-breakers and contactors or with fuses using contactors and overload relays.

A simple starter configuration comprising of a circuit-breaker and contactor without starting steps or soft starting is the right solution for drives such as pumps, saws and similar applications. However, this also applies to large drives, for example, amusement rides and rolling mills can be directly started with SIRIUS.

SIRIUS components can be combined to give the following combinations of starters:

Simple starter with fuses
Fuseless starter
Reversing starter
Star-Delta starter
Soft Starters
Starters on ASI or Profibus-DP
Starters with Safety Integrated Technology