chapter04 (EN)

Controls – Solid-State Switching Devices

Controls – Solid-State Switching Devices Introduction Solid-State Switching Devices General data Solid-State Switching Devices for Resistive Loads General data Solid-State Relays General data 3RF21 solid-state relays, single-phase, 22.5 mm 3RF20 solid-state relays, single-phase, 45 mm 3RF22 solid-state relays, three-phase, 45 mm Solid-State Contactors General data 3RF23 solid-state contactors, single-phase 3RF24 solid-state contactors, three-phase 3RF29 Function Modules General data Converters Load monitoring Heating current monitoring Power controllers Power regulators Project planning aids Solid-State Switching Devices for Switching Motors Solid-State Contactors General data 3RF24 solid-state contactors, three-phase 3RF24 solid-state reversing contactors, three-phase Siemens · 2009 4 5 6 8 9 15 19 25 26 35 44 46 47 48 49 50 51 53 55 61

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Introduction

Controls – Solid-State Switching Devices Introduction ■ Overview 3RF21 3RF20 3RF22 3RF23 3RF24 3RF24 (Motor) 3RF29 22.5 mm solid-state relays, 45 mm solid-state relays • Widths of 22.5 mm and 45 mm • Compact and space-saving design 3RF21, 3RF20 9 15 • "Zero-point switching" version • Mounting onto existing heat sinks 3RF22 19 Solid-state contactors • Complete units comprising a solid-state relay and an optimized heat sink, "ready to use" 3RF23 26 • Compact and space-saving design 3RF24 35 • Versions for resistive loads "zero-point switching" and inductive loads "instantaneous switching" • Special versions "Low noise" and "Short-circuit resistant" Converters • For converting an analog input signal into an on/off ratio; can also be used on 3RF22 and 3RF24 three-phase switching devices 3RF29 00-0EA18 46 3RF29 20-0FA08, 3RF29 .0-0GA..

47 Heating current monitoring • For load monitoring of one or more loads (partial loads); remote teach 3RF29 ..-0JA.. 48 3RF29 ..-0KA. 49 Power regulators • For supplying the current by means of a solid-state switching device depending on a setpoint value. Closed-loop control: full-wave control or generalized phase control 3RF29 .0-0HA.. 50 Solid-state contactors, solid-state reversing contactors • Complete units comprising in the insulated enclosure with integrated heat sink, "ready to use" 3RF24 55 • Compact and space-saving design • Version for motors, "instantaneous switching" 4 Siemens · 2009 Order No.

Page SIRIUS solid-state switching devices for switching resistive loads Solid-state relays Solid-state contactors Function modules For extending the functionality of the 3RF21 solid-state relays and the 3RF23 solid-state contactors for many different applications: Load monitoring • For load monitoring of one or more loads (partial loads) Power controllers • For supplying the current by means of a solid-state switching device depending on a setpoint value. There is a choice of full-wave control and generalized phase control. SIRIUS solid-state switching devices for switching motors Solid-state contactors

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General data

Solid-State Switching Devices General data ■ Overview The most reliable solution for any application Compared to mechanical controlgear, our SIRIUS 3RF2 solid- state switching devices stand out due to their considerably lon- ger service life. Thanks to the high product quality, their swit- ching 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 ap- plication, our modular controlgear can also be quite easily ex- panded by the addition of standardized function modules.

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 rota- tion 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.

SIRIUS 3RF2 solid-state switching devices The 3RF solid-state switching devices reliably switch a wide range of different loads with alternating voltages in 50 and 60 Hz systems. Always on the sunny side with SIRIUS Solid-state switching devices for resistive loads • Solid-state relays • Solid-state contactors • Function modules Because SIRIUS 3RF2 offers even more: • The space-saving and compact side-by-side mounting en- sures 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.

Solid-state switching devices for switching motors • Solid-state contactors • Solid-state reversing contactors Connection methods SIRIUS 3RF2 – for almost unending activity The devices are available with screw terminals (box terminals), spring-type terminals or ring terminal lugs. Conventional electromechanical controlgear is often overtaxed by the rise in the number of switching operations. A high swit- ching 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 swit- ching devices we provide you with solid-state relays and contac- tors with a particularly long endurance – for almost unending ac- tivity even under the toughest conditions and under high mechanical load, but also in noise-sensitive areas. Screw terminals Spring-type terminals Ring terminal lug connections Proved time and again in service These connections are indicated in the Technical specifications by orange backgrounds. SIRIUS 3RF2 solid-state switching devices have firmly establis- hed in industrial applications.

They are used above all in appli- cations where loads are switched frequently – mainly with resis- tive 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, their silent swit- ching means that SIRIUS is also ideally suited for use in noise- sensitive areas, such as offices or hospitals. 5 Siemens · 2009

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General data

Solid-State Switching Devices for Resistive Loads General data ■ Overview ✓ Function is available ❑ Function is possible 1) The converter can also be used with three-phase devices.

6 Siemens · 2009 Type Solid-state relays Solid-state contactors Function modules Single-phase Three- phase Single- phase Three- phase Converters Load monitoring Heating current monitoring Power controllers Power regulators 22.5 mm 45 mm 45 mm Basic Extended Usage Simple use of exis- ❑ ting solid-state relays Complete unit ❑ "Ready to use" Space-saving ✓ Can be extended ✓ with modular function modules Frequent switching -- and monitoring of loads and solid-state relays/solid-state contactors Monitoring of up to -- 6 partial loads Monitoring of more -- than 6 partial loads Control of the hea- -- ting power through an analog input Power control -- ❑ ✓ ❑ ❑ ❑ -- -- -- -- -- -- ❑ ❑ ✓ ✓ -- -- -- -- -- -- ✓ -- ✓ ✓ ✓ ✓ ✓ -- -- -- -- -- 1) ✓ 1) -- -- -- -- -- -- -- -- -- -- -- -- ✓ ✓ ✓ ✓ ✓ -- -- -- -- -- ✓ -- ✓ ✓ -- -- -- -- -- -- -- -- ✓ -- -- -- -- -- -- -- ✓ -- -- -- ✓ ✓ -- -- -- -- -- -- -- -- -- -- ✓ Startup Easy setting of set- -- point values with "Teach" button "Remote Teach" -- input for setting setpoints -- -- -- -- -- -- ✓ ✓ -- ✓ ✓ -- -- -- -- -- -- -- ✓ -- -- Mounting Mounting onto -- mounting rails or mounting plates Can be snapped -- directly onto a solid-state relay or contactor For use with "Cool- ✓ plate" heat sink -- -- -- ✓ ✓ -- -- -- -- -- -- -- -- -- -- ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ -- -- -- -- -- -- -- -- Cable routing Connection of load ✓ circuit as for controlgear Connection of load -- circuit from above ✓ -- ✓ ✓ ✓ -- ✓ ✓ ✓ ✓ ✓ ✓ -- -- -- -- -- -- -- -- --

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