Siemens motor starter selection guide Frontier

Siemens motor starter selection guide

Application manual Controls with IE3/IE4 motors Siemens SIRIUS 3RV2 motor starter protectors reliably intervene in three different cases. In the event of a short-circuit – current >13 times the rated current – the short-circuit releases isolate the faulty load feeder from the power supply within only a few milliseconds.

Application manual Controls with IE3/IE4 motors Siemens

Motor Protection downloads.siemens.com. SIEMENS SIRIUS 3RT Contactors 3RT101 3RT102 3RT103 3RT104 Larger 3RT105, 3RT106 and 3RT107 Contactors. Siemens Sirius motor starter contactors have high contact reliability, a narrow design, long life time, and the ability to operate under extreme conditions., Optimum support from selection and configuration to commissioning Whether you're configuring simple drive components or engineering complex drive systems and solutions, our range of tools can supply professional tools for the job. Siemens is also your reliable partner for commissioning and diagnostics..

Siemens IC 10 A · 04/2018 6/5 SIRIUS 3RW Soft Starters General data 6 Recommended soft starter Possible soft starter 1) The mass inertia of the fan is <10 times the mass inertia of the motor. 2) The mass inertia of the fan is ≥10 times the mass inertia of the motor… Soft starters zero generate harmonics so you can forget about filters and screened cables Improve uptime, save energy and protect motors effectively Selection Guide VLT® Soft Starter

Based on the input data and the calculation, a number of ABB softstarters will be presented, representing the optimal selection within the ABB softstarter range. You will find the selection of PSR, PSS, PSE, PST and PSTB for inline connection with motor and for PSS, PST and PSTB for inside delta connection. For any selected softstarter, a SIEMENS - 3TF8 Reversing Motor Starters - Contactors SIEMENS 3TF8 Reversing Contactors. The type 3TF8 reversing contactor contains both the forward and reverse contactors and interlocks in one compact housing simplifying the component arrangement. Mechanincally interlocked, it reduces panel space by 50% over conventional reversing contactors.

Siemens Industry Catalog - Automation technology - Industrial controls - Protection equipment - Motor starter protectors/circuit breakers - SIRIUS 3RV2 motor starter protectors SIEMENS SIRIUS 3RT Contactors 3RT101 3RT102 3RT103 3RT104 Larger 3RT105, 3RT106 and 3RT107 Contactors. Siemens Sirius motor starter contactors have high contact reliability, a narrow design, long life time, and the ability to operate under extreme conditions.

SIRIUS 3RV2 motor starter protectors reliably intervene in three different cases. In the event of a short-circuit – current >13 times the rated current – the short-circuit releases isolate the faulty load feeder from the power supply within only a few milliseconds. Siemens has an installed base of Motor Control Centers dating back to 1964. Our Siemens tiastar MCCs are designed as self-contained modular units which meets UL and NEMA standards. They come with rear-mounted, self-aligning copper stabs that firmly grasp onto the bus. Brackets guide the placement of units, further assuring positive

Soft starters zero generate harmonics so you can forget about filters and screened cables Improve uptime, save energy and protect motors effectively Selection Guide VLT® Soft Starter The SIRIUS 3RM1 motor starters described here have been developed to carry out switching functions as part of a plant or machine. The 3RM1 motor starters are available as direct-on-line starters in Standard design without safety-related shutdown (3RM10) and in Failsafe design with safety-related shutdown motor starters: Industrial controls

Tested motor-starter combinations: Quick selection - easy ordering Pushbutton-Configurator. Fast and easy combination of pilot devices suitable for your application. Characteristics Program. Characteristics program for short-circuit and overload protection devices – CurveSelect Selectivity, Back Up Protection and Coordination Guide. Coordination tables of low voltage protective devices Low-voltage motors and electric motors for motion control applications. The Drive Technology Configurator (DT Configurator) supports you when selecting the optimum electric motor for your application – including the applicable options and the matching converter.The Configurator directly transfers the data of the selected motor into the Siemens Industry Mall shopping cart.

Siemens - 3TF motor starters - contactors. Frame Size Amp Ratings Single Phase HP Ratings Three Phase HP Ratings Auxiliary This includes standard full NEMA sizes and motor matched half sizes exclusive to Siemens. Starters are available as open and enclosed with electronic and bimetal overload protection, as well as a wide selection of accessories and spare parts.

SIEMENS Motor Starters. 610 products found. Motor starters help protect motors from damage caused by over and under voltages. Definite purpose contactors are suitable for many air compressor, agricultural equipment, pump, and food service equipment applications. Manual motor starters can provide on/off operation and overload protection for many small 1-phase, 3-phase, or DC motors in … Siemens / Industrial Controls Previous folio: 0/3 Section 1 IEC Motor Starter Protectors IEC Combination Starters Section 4 Section 2 IEC Contactors Fast Bus Power Distribution System Section 5 Section 3 IEC Overload Relays Hybrid Motor Starters Section 6 The SIRIUS 3RA1/2 Combination Starters consist of …

Application manual Controls with IE3/IE4 motors Siemens

Siemens motor starter selection guide

3TF Contactors Motor Starters - Siemens. This includes standard full NEMA sizes and motor matched half sizes exclusive to Siemens. Starters are available as open and enclosed with electronic and bimetal overload protection, as well as a wide selection of accessories and spare parts., ET 200SP Motor starter (3RK1308‑0**00‑0CP0) Equipment Manual 11/2019 A5E34821005002A/RS-AC/003 Security information 1 Information about third-party software 2 Product-specific safety instructions 3 Documentation guide 4 Product features 5 Functions 6 Parameters/address space 7 Alarms/diagnostic messages 8 Technical data 9 CAx data 10 Data sets A Circuit examples B . Siemens ….

Handbook Softstarter Handbook ABB Group. SIMATIC ET 200SP Distributed I/O system System Manual 09/2019 A5E03576849-AJ Preface ET 200SP Documentation Guide 1 New properties/functions 2 System overview 3 Application planning 4 Installation 5 Wiring 6 Configuring 7 Basics of program execution 8 Protection 9 Configuration control (option, SIRIUS 3RV Motor Starter Protectors Manual 08/2018 A5E03656507320A/RS-AF/007 Introduction 1 Standards 2 Product description 3 Product combinations 4 Functions 5 Configuration 6 Mounting 7 Connection 8 Operation 9 Accessories 10 Technical data 11 Circuit diagrams 12 Types of coordination A References B Dimension drawings (dimensions in mm) C . Siemens AG Division Digital Factory ….

The Basics of Motor Selection Groschopp

Siemens motor starter selection guide

3TF Contactors Motor Starters - Siemens. Motor Protection 2 Siemens LSA 2.4.2. September 1995 Thermal overload (ANSI 49/49R) The relay uses a thermal memory to re-semble the remaining thermal capacity of the protected device. SINAMICS S120 Getting Started with the STARTER Commissioning Tool – 12.2004 Edition! Caution The surface temperature of the motors can reach over +80 C. For this reason, temperature-sensitive parts (lines or electronic components, for example) must not be placed on or attached to the motor. When attaching the connecting cables, you must.

Siemens motor starter selection guide

  • Combination Starters NEMA Style 8538CT9701R1015
  • Soft Starters Schneider Electric

  • Siemens - 3TF motor starters - contactors. Frame Size Amp Ratings Single Phase HP Ratings Three Phase HP Ratings Auxiliary 1-2 2015 Low Voltage AC Motors Selection and Pricing Guide The majority of Siemens low voltage motors listed in this price guide currently meet, or exceed, the June 1, 2016 mandatory regulations. Industry-leading, die cast copper rotor motors, exceed all efficiency requirements. Vertical, solid shaft, P-base (HP & LP) motors will be

    SIRIUS 3RV Motor Starter Protectors Manual 08/2018 A5E03656507320A/RS-AF/007 Introduction 1 Standards 2 Product description 3 Product combinations 4 Functions 5 Configuration 6 Mounting 7 Connection 8 Operation 9 Accessories 10 Technical data 11 Circuit diagrams 12 Types of coordination A References B Dimension drawings (dimensions in mm) C . Siemens AG Division Digital Factory … Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensu re that the products operate safely and

    GE Catalog Overload Relay Heater Selection Guide GE Control Renewal Parts GE IEC Manual Motor Starters GE Industrial Circuit Breakers Thermal-Magnetic Trip GE Lighting Contactors GE Molded Case Circuit Breaker Quick Reference GE NEMA 300-Line Starters Technical Data GE NEMA CR306 & CR386 Magnetic Starters GE NEMA CR309 Reversing Starters GE Overload Relay Heater Selection Guide GE … Softstarter Handbook 1SFC132060M0201 This book is written with the thought of being a general guide for people working with softstarter applications but also for those just interested in learning more about this type of starting method. It doesn’t matter if you are an expert or novice, hopefully you will find some interesting and useful information either by reading from cover to cover

    Selection and application guide Integrated Power Systems Switchboards Selection and application guide . Integrated Power Systems Switchboards Contents General Product Information 2 - 3 General Layout Information 4 Single Width Configurations 5 - 7 Modules A & B – Panelboards & Distribution Sections 5 Modules A & B – MCCBs & Auxiliary 6 Modules B & C – Transformers 7 Double Width Siemens / Industrial Controls Previous folio: 0/3 Section 1 IEC Motor Starter Protectors IEC Combination Starters Section 4 Section 2 IEC Contactors Fast Bus Power Distribution System Section 5 Section 3 IEC Overload Relays Hybrid Motor Starters Section 6 The SIRIUS 3RA1/2 Combination Starters consist of …

    Controls with IE3/IE4 motors Application manual, 11/2015, A5E34118826002A/RS-AB/002 11 IE3 motors 2 2.1 IE3 motors from Siemens Description IE3-compliant induction motors from Siemens are characterized by their reliability, long service life, and ruggedness. IE3 Premium Efficiency motors from Siemens are available with power ratings from 500 W to The SIRIUS 3RM1 motor starters described here have been developed to carry out switching functions as part of a plant or machine. The 3RM1 motor starters are available as direct-on-line starters in Standard design without safety-related shutdown (3RM10) and in Failsafe design with safety-related shutdown motor starters: Industrial controls

    Controls with IE3/IE4 motors Application manual, 11/2015, A5E34118826002A/RS-AB/002 11 IE3 motors 2 2.1 IE3 motors from Siemens Description IE3-compliant induction motors from Siemens are characterized by their reliability, long service life, and ruggedness. IE3 Premium Efficiency motors from Siemens are available with power ratings from 500 W to SIRIUS 3RV Motor Starter Protectors Manual 08/2018 A5E03656507320A/RS-AF/007 Introduction 1 Standards 2 Product description 3 Product combinations 4 Functions 5 Configuration 6 Mounting 7 Connection 8 Operation 9 Accessories 10 Technical data 11 Circuit diagrams 12 Types of coordination A References B Dimension drawings (dimensions in mm) C . Siemens AG Division Digital Factory …

    SD200 The SIMOTICS SD200 low voltage motor from Siemens combines flexibility, performance and efficiency to meet any customer need. The footing works for nearly any retrofit and a broad selection of options makes custom orders a thing of the past, allowing for optimal performance in … Siemens Industry Catalog - Drive technology - Motors - Motors for Motion Control - SIMOTICS M main motors - 1PH8 servomotors (asynchronous) - Selection guides for 1PH8 motors. Login Registration. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having

    The SIRIUS 3RM1 motor starters described here have been developed to carry out switching functions as part of a plant or machine. The 3RM1 motor starters are available as direct-on-line starters in Standard design without safety-related shutdown (3RM10) and in Failsafe design with safety-related shutdown motor starters: Industrial controls Complete range of soft starters from 0.37 kW (3 A) to 900 kW (1200 A) that reduces mechanical stress on your machines. Whatever your installation, there is an Altistart soft starter to protect your motors. More Information Less Information

    Soft starters zero generate harmonics so you can forget about filters and screened cables Improve uptime, save energy and protect motors effectively Selection Guide VLT® Soft Starter SIEMENS SIRIUS 3RT Contactors 3RT101 3RT102 3RT103 3RT104 Larger 3RT105, 3RT106 and 3RT107 Contactors. Siemens Sirius motor starter contactors have high contact reliability, a narrow design, long life time, and the ability to operate under extreme conditions.

    The Basics of Motor Selection Groschopp

    Siemens motor starter selection guide

    Combination Starters NEMA Style 8538CT9701R1015. Siemens Industry Catalog - Drive technology - Motors - Low-Voltage Motors (standard industrial motors) Login Login. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having other functions at your disposal., Siemens Industry Catalog - Automation technology - Industrial controls - Load feeders and motor starters - For use in the control cabinet - SIRIUS 3RA2 load feeders - 3RA21 direct-on-line starters.

    Handbook Softstarter Handbook ABB Group

    tiastar TM Motor Control Center Catalog and Application Guide. Controls with IE3/IE4 motors Application manual, 11/2015, A5E34118826002A/RS-AB/002 11 IE3 motors 2 2.1 IE3 motors from Siemens Description IE3-compliant induction motors from Siemens are characterized by their reliability, long service life, and ruggedness. IE3 Premium Efficiency motors from Siemens are available with power ratings from 500 W to, Siemens Industry Catalog - Automation technology - Industrial controls - Load feeders and motor starters - For use in the control cabinet - SIRIUS 3RA2 load feeders - 3RA21 direct-on-line starters.

    Soft starters zero generate harmonics so you can forget about filters and screened cables Improve uptime, save energy and protect motors effectively Selection Guide VLT® Soft Starter This includes standard full NEMA sizes and motor matched half sizes exclusive to Siemens. Starters are available as open and enclosed with electronic and bimetal overload protection, as well as a wide selection of accessories and spare parts.

    Siemens Industry Catalog - Drive technology - Motors - Motors for Motion Control - SIMOTICS M main motors - 1PH8 servomotors (asynchronous) - Selection guides for 1PH8 motors. Login Registration. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having Siemens Industry Catalog - Drive technology - Motors - Low-Voltage Motors (standard industrial motors) Login Login. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having other functions at your disposal.

    The SIRIUS 3RM1 motor starters described here have been developed to carry out switching functions as part of a plant or machine. The 3RM1 motor starters are available as direct-on-line starters in Standard design without safety-related shutdown (3RM10) and in Failsafe design with safety-related shutdown motor starters: Industrial controls Steven Engineering offers technical specifications for adjustable frequency drives, combination starters, IEC and NEMA contactors and starters and other motor control solutions.

    15-2 Siemens Canada Limited Power Product Catalogue 15 LOW VOLTAGE MOTOR STARTERS SIRIUS HP Rated Magnetic Starters Selection Catalogue Number Selection Guide Starter Series Disconnect Type Starter Type Enclosure Type Contactor Ref. Number Coil Voltage Overload Relay Setting Range page 15-3-15-18 page 15-19 V SIRIUS IEC HP rated Starter 1 Non SIMATIC ET 200SP Distributed I/O system System Manual 09/2019 A5E03576849-AJ Preface ET 200SP Documentation Guide 1 New properties/functions 2 System overview 3 Application planning 4 Installation 5 Wiring 6 Configuring 7 Basics of program execution 8 Protection 9 Configuration control (option

    Coordination tables for Motor protection ~ Info on IE3 Motors ~ UL Motor Coordinations BETA Once ready, the PDF will be available for download . Or, enter your … Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensu re that the products operate safely and

    Selection and application guide Integrated Power Systems Switchboards Selection and application guide . Integrated Power Systems Switchboards Contents General Product Information 2 - 3 General Layout Information 4 Single Width Configurations 5 - 7 Modules A & B – Panelboards & Distribution Sections 5 Modules A & B – MCCBs & Auxiliary 6 Modules B & C – Transformers 7 Double Width Siemens Industry Catalog - Automation technology - Industrial controls - Protection equipment - Motor starter protectors/circuit breakers - SIRIUS 3RV2 motor starter protectors

    Type S magnetic starters are used for full-voltage starting and stopping of AC squirrel cage motors. Motor overload protection for three-phase starter applications can be provided through one of four options, as follows: Solid-State Overload Relay Protection (Motor … Siemens - 3TF motor starters - contactors. Frame Size Amp Ratings Single Phase HP Ratings Three Phase HP Ratings Auxiliary

    Softstarter Handbook 1SFC132060M0201 This book is written with the thought of being a general guide for people working with softstarter applications but also for those just interested in learning more about this type of starting method. It doesn’t matter if you are an expert or novice, hopefully you will find some interesting and useful information either by reading from cover to cover Siemens IC 10 A · 04/2018 6/5 SIRIUS 3RW Soft Starters General data 6 Recommended soft starter Possible soft starter 1) The mass inertia of the fan is <10 times the mass inertia of the motor. 2) The mass inertia of the fan is ≥10 times the mass inertia of the motor…

    Documentation guide Motor starter System Manual, 04/2016, A5E35582704002A/RS-AA/001 11 Application examples The application examples support you with various tools and examples for solving your automation tasks. Solutions are shown in interplay with multiple components in the system - separated from the focus in individual products. You can find the application examples on the Internet … GE Catalog Overload Relay Heater Selection Guide GE Control Renewal Parts GE IEC Manual Motor Starters GE Industrial Circuit Breakers Thermal-Magnetic Trip GE Lighting Contactors GE Molded Case Circuit Breaker Quick Reference GE NEMA 300-Line Starters Technical Data GE NEMA CR306 & CR386 Magnetic Starters GE NEMA CR309 Reversing Starters GE Overload Relay Heater Selection Guide GE …

    Soft Starters Schneider Electric

    Siemens motor starter selection guide

    3TF8 Reversing Contactors Motor Starters - Siemens. Large motors may experience a considerable voltage drop at the motor terminals when started due to large inrush current values. Motors can be designed to compensate for this drop in voltage. For example, motors in frames 182-5013 can be supplied for operation under low starting voltage conditions down to 65% of nameplate rated voltage. The, Softstarter Handbook 1SFC132060M0201 This book is written with the thought of being a general guide for people working with softstarter applications but also for those just interested in learning more about this type of starting method. It doesn’t matter if you are an expert or novice, hopefully you will find some interesting and useful information either by reading from cover to cover.

    System Manual SIMATIC ET 200SP Motor starter Siemens. Siemens IC 10 A · 04/2018 6/5 SIRIUS 3RW Soft Starters General data 6 Recommended soft starter Possible soft starter 1) The mass inertia of the fan is <10 times the mass inertia of the motor. 2) The mass inertia of the fan is ≥10 times the mass inertia of the motor…, SIRIUS 3RV2 motor starter protectors reliably intervene in three different cases. In the event of a short-circuit – current >13 times the rated current – the short-circuit releases isolate the faulty load feeder from the power supply within only a few milliseconds..

    Enclosed NEMA Starters product guide Siemens

    Siemens motor starter selection guide

    Configuring the SIRIUS modular system. SD200 The SIMOTICS SD200 low voltage motor from Siemens combines flexibility, performance and efficiency to meet any customer need. The footing works for nearly any retrofit and a broad selection of options makes custom orders a thing of the past, allowing for optimal performance in … SIRIUS 3RV Motor Starter Protectors Manual 08/2018 A5E03656507320A/RS-AF/007 Introduction 1 Standards 2 Product description 3 Product combinations 4 Functions 5 Configuration 6 Mounting 7 Connection 8 Operation 9 Accessories 10 Technical data 11 Circuit diagrams 12 Types of coordination A References B Dimension drawings (dimensions in mm) C . Siemens AG Division Digital Factory ….

    Siemens motor starter selection guide


    Motor selection is often a complicated process that takes a lot of work with various vendors and time to sort and evaluate quotes. Groschopp engineers share knowledge and expertise about the motor selection process. Focusing on four broad motor types, care is taken to meticulously evaluate the characteristics, advantages, and drawbacks of each of dollars per project. Every half-size starter saves you money—up to 31% as illustrated in the table. All “half-sizes” comply to applicable UL standards. A comprehensive starter selection Siemens exclusive half-size starters “Half-size” Motor size Starter Half savings over 230V 460V size size next full size

    Home » About Us » News » Selecting an IEC Motor Starter. Selecting an IEC Motor Starter. Posted July 19, 2018 by springercontrols. This is a detailed guide in selecting the right motor starter for your application. Let’s start with a quick brush up on the components of a motor starter. Home » About Us » News » Selecting an IEC Motor Starter. Selecting an IEC Motor Starter. Posted July 19, 2018 by springercontrols. This is a detailed guide in selecting the right motor starter for your application. Let’s start with a quick brush up on the components of a motor starter.

    SIMATIC - EM 300 Motor Starters GWA-4NEB 640070302-05 i Important Information Purpose of the Manual This manual complements the ET 200X Distributed I/O Device manual.It de-scribes all the functions of the EM 300 motor starters. Product Guide nema STARTERS. Innovation in electronic motor protection motor starters started here at Siemens. Proven protection since the early 90’s, this NEMA starter with electronic overload has saved millions of motors from being damaged or over heated due to over-currents degrading the motors and shortening its life expectancy. Customer testimonials claim thousands of dollars in savings

    SIMATIC ET 200SP Distributed I/O system System Manual 09/2019 A5E03576849-AJ Preface ET 200SP Documentation Guide 1 New properties/functions 2 System overview 3 Application planning 4 Installation 5 Wiring 6 Configuring 7 Basics of program execution 8 Protection 9 Configuration control (option GE Catalog Overload Relay Heater Selection Guide GE Control Renewal Parts GE IEC Manual Motor Starters GE Industrial Circuit Breakers Thermal-Magnetic Trip GE Lighting Contactors GE Molded Case Circuit Breaker Quick Reference GE NEMA 300-Line Starters Technical Data GE NEMA CR306 & CR386 Magnetic Starters GE NEMA CR309 Reversing Starters GE Overload Relay Heater Selection Guide GE …

    ET 200SP Motor starter (3RK1308‑0**00‑0CP0) Equipment Manual 11/2019 A5E34821005002A/RS-AC/003 Security information 1 Information about third-party software 2 Product-specific safety instructions 3 Documentation guide 4 Product features 5 Functions 6 Parameters/address space 7 Alarms/diagnostic messages 8 Technical data 9 CAx data 10 Data sets A Circuit examples B . Siemens … SIEMENS - 3TF8 Reversing Motor Starters - Contactors SIEMENS 3TF8 Reversing Contactors. The type 3TF8 reversing contactor contains both the forward and reverse contactors and interlocks in one compact housing simplifying the component arrangement. Mechanincally interlocked, it reduces panel space by 50% over conventional reversing contactors.

    Softstarter Handbook 1SFC132060M0201 This book is written with the thought of being a general guide for people working with softstarter applications but also for those just interested in learning more about this type of starting method. It doesn’t matter if you are an expert or novice, hopefully you will find some interesting and useful information either by reading from cover to cover Documentation guide Motor starter System Manual, 04/2016, A5E35582704002A/RS-AA/001 11 Application examples The application examples support you with various tools and examples for solving your automation tasks. Solutions are shown in interplay with multiple components in the system - separated from the focus in individual products. You can find the application examples on the Internet …

    SIMATIC - EM 300 Motor Starters GWA-4NEB 640070302-05 i Important Information Purpose of the Manual This manual complements the ET 200X Distributed I/O Device manual.It de-scribes all the functions of the EM 300 motor starters. Siemens Industry Catalog - Drive technology - Motors - Low-Voltage Motors (standard industrial motors) Login Login. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having other functions at your disposal.

    Siemens Industry Catalog - Drive technology - Motors - Motors for Motion Control - SIMOTICS M main motors - 1PH8 servomotors (asynchronous) - Selection guides for 1PH8 motors. Login Registration. As an already registered user simply enter your userame and password in the login page in the appropriate fields. After logging in you will see your user specific settings and prices as well as having Optimum support from selection and configuration to commissioning Whether you're configuring simple drive components or engineering complex drive systems and solutions, our range of tools can supply professional tools for the job. Siemens is also your reliable partner for commissioning and diagnostics.

    Siemens products may only be used for the applications described in the catalog and in the relevant technical documentation. If products and components from other manufacturers are used, these must be recommended or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and maintenance are required to ensu re that the products operate safely and SIEMENS - 3TF8 Reversing Motor Starters - Contactors SIEMENS 3TF8 Reversing Contactors. The type 3TF8 reversing contactor contains both the forward and reverse contactors and interlocks in one compact housing simplifying the component arrangement. Mechanincally interlocked, it reduces panel space by 50% over conventional reversing contactors.