SIRIUS 3RW Soft Starters

SIRIUS 3RW soft starters permit soft starting and smooth ramp-down of three-phase asynchronous motors. Depending on the scope of functions required it is possible to choose between:

• Soft starters for Standard applications
• Soft starters for High-Feature applications

SIRIUS 3RW – Service-proven in many applications

Functions of the SIRIUS soft starters include:

• Soft starting and ramp-down
• Stepless starting
• Torque control and limitation

Cost-efficient operation

The advantages of SIRIUS soft starters at a glance:

• Reduction of current peaks
• Avoidance of mains voltage fluctuations during starting
• Reduced load on the power supply network
• Reduction of the mechanical load in the operating mechanism
• Considerable space savings and reduced wiring compared with conventional starters
• Maintenance-free switching
• Very easy handling
• Fit perfectly in the SIRIUS modular system (3RW30 and 3RW40)

Use of soft starters in conjunction with IE3/IE4 motors

Note:

For the use of 3RW soft starters in conjunction with highly energy-efficient IE3/IE4 motors, please observe the information on dimensioning and configuring, see Application Manual "Controls with IE3/IE4 Motors", https://support.industry.siemens.com/cs/ww/en/view/94770820.

SIRIUS 3RF solid-state switching devices

Three-phase solid-state contactor and single-phase solid-state relay

The SIRIUS 3RF2 solid-state switching devices reliably switch a wide range of different loads with alternating voltages in 50 and 60 Hz systems.

SIRIUS 3RF2 solid-state switching devices for resistive/inductive loads:

• Solid-state relays
• Solid-state contactors
• Function modules

SIRIUS 3RF3 solid-state switching devices for switching motors:

• Solid-state contactors
• Solid-state reversing contactors

SIRIUS 3RF2 – for almost unending activity

Conventional electromechanical switchgear is often overtaxed by the rise in the number of switching operations. A high switching frequency results in frequent failure and short replacement cycles. However, this does not have to be the case, because with the latest generation of our SIRIUS 3RF2 solid-state switching devices we provide you with solid-state relays and contactors with a particularly long endurance - for almost unending activity even under the toughest conditions and under high mechanical load, but also in noise-sensitive areas.

Proved time and again in service

SIRIUS 3RF2 solid-state switching devices have firmly established themselves in industrial applications. They are used above all in applications where loads are switched frequently – mainly with resistive load controllers, with the control of electrical heat or the control of valves and motors in conveyor systems. In addition to its use in areas with high switching frequencies, its silent switching means that SIRIUS is also ideally suited for use in noise-sensitive areas, such as offices or hospitals.

The most reliable solution for any application

Compared to mechanical switchgear, our SIRIUS 3RF2 solid-state switching devices stand out due to their considerably longer service life. Thanks to the high product quality, their switching is extremely precise, reliable and, above all, insusceptible to faults. With its variable connection methods and a wide spread of control voltages, the SIRIUS 3RF2 family is universally applicable. Depending on the individual requirements of the application, our modular switchgear can also be quite easily expanded by the addition of standardized function modules.

Ideal for operation with heating control systems

The 3RF2 solid-state switching devices can be used for example in the SIPLUS HCS300I heating control system. They are optimally connected to the digital output module of the HCS300I by means of preassembled cables. This saves considerable wiring outlay in the control circuit and shortens mounting time.

The HCS300I is a modular heating control system for the optimization of plastic processing machines. It enables individual solutions for many different heating control applications. With each basic unit it is possible to use up to four 6-channel digital outputs to control solid-state switching devices and four 4-channel temperature measuring modules. Current or current-and-voltage measuring modules can be used to monitor the loads. Communication with the higher-level control system is performed via PROFIBUS DP.

SIPLUS heating control system

Also for switching motors

In order to achieve higher productivity, the switching frequency is continuously increased. It is no problem for our SIRIUS solid-state contactors to switch motors. With induction motors up to 7.5 kW, they can reliably withstand even the highest switching frequencies. Even a continuous change in the direction of rotation is possible with the solid-state reversing contactors. Both versions can be perfectly combined with components from the SIRIUS modular system. Connecting with SIRIUS motor starter protectors or SIRIUS overload relay can be implemented without any further steps.

Always on the sunny side with SIRIUS

Because SIRIUS 3RF2 offers even more:

• The space-saving and compact side-by-side mounting ensures reliable operation up to an ambient temperature of +60 °C.
• Thanks to fast configuration and the ease of mounting and start-up, you save not only time but also expenses.

Use of SIRIUS solid-state switching devices for switching motors in conjunction with IE3/IE4 motors

Note:

For the use of SIRIUS solid-state switching devices for switching motors in conjunction with highly energy-efficient IE3/IE4 motors, please observe the information on dimensioning and configuring, see Application Manual "Controls with IE3/IE4 Motors", https://support.industry.siemens.com/cs/ww/en/view/94770820.

Connection method

The solid-state switching devices are available with screw terminals (box terminals), spring-type or ring terminal lugs.

For comprehensive technical information, see the manuals/operating instructions, https://support.industry.siemens.com/cs/ww/en/ps/16211/man.