Magnetic Contractors - Definite Purpose Contactors
Shop Our Siemens-Furnas Contactors Catalog
SIRIUS IEC Contactors @ Siemens
When endurance and extreme load capability are the name of the game, Sirius Contactors are the perfect choice. The narrow design, the high availability, and the wide range of Sirius contactors ensure that these contactors have the optimum type for any requirement. Standard Contactors, along with Vacuum, 4 pole, 4 pole (2 NO + 2 NC), Capacitive, Standard Reversing Contactor Assemblies, Resistive, Solid State or Conventional Coil, with Remaining Life Time indicator, with AS-Interface are just a few of the versions which round out the Sirius Family. A large array of easily installed, standard accessories may be used to customize the contactors for different applications. These auxiliaries can be easily connected to the family of contactors. High contactor reliability, long life time, and the ability to operate under extreme conditions (up to 60 degrees C) differentiate the Sirius family of contactors.
SIRIUS IEC Starters @ Siemens
Combination Starters & Starters for Group Installation
The 3RA1 combination starters consist of the 3RV10 MSP and one or more 3RT1 contactors. The Non-Reversing or Reversing assemblies come with a FastBus mounting shoe or as a Panel Mount version. The MSP and contactor(s) are prewired and mechanically connected with preassembled kits (link modules, connection assembly kits and mounting rail or busbar adapters). As the 3RA1 combination starters are constructed from 3RV1 MSPs and 3RT1 contactors, the same accessories can be used for the combination starter as are used for the MSPs and contactors. With the addition of a terminal kit the fame sizes S0 and S3 can be applied as a Combination Starter, UL508 Type F. The S2 frame size can be applied as a Combination Starter, UL508 Type F without the addition of a terminal kit.
Clockwise or counter-clockwise – our reversing combinations allow a motor to be operated with two directions of rotation. This combination comprises two standard contactors where the phases are interchanged.
If you wish to assemble the combination yourself, the contactors can be quickly, simply and reliably wired-up and mechanically interlocked using the appropriate link and interlocking modules from the modular SIRIUS system.
The starting characteristics are the same as those of a direct online starter. In conjunction with the appropriate protective elements, just like the direct online starter, space-saving and compact load feeders can be assembled, both with fuses and without fuses.
Contactor relays are switching devices for control and auxiliary circuits and are used to control, provide signals and interlock switching devices and switchgear panels. It goes without saying that the 3RH1 SIRIUS contactor relays have connection designations in compliance with the standard and use a connection system which is both time and cost saving – fulfilling the requirements from the field. The 3RH1 contactor relays and the size S00 motor contactors are the same size and have the same optical design; this represents a significant advantage, especially when it comes to accessories.
They are designed for AC or DC operation and are available with screw or spring-loaded technology. The basic version of the contactor relays has 4 poles but this can be extended up to 8 poles using auxiliary contact blocks.
Contactors for Switching Motors
The three-pole 3RT10 contactors are admirably suited for one of the most generally encountered applications – switching 3-phase motors. The complete power range from 3 to 250 kW/400 V, for AC as well as DC operation, is covered by just seven sizes. For applications where an extremely high electrical service life is important, for heavy-duty starting or for applications with 1000 V the 3RT12 vacuum contactors are the right choice.
SIRIUS 3RT contactors in sizes S6, S10 and S12 offer you flexibility unknown up to now: coils can be lifted out and replaced in the fitted contactor without tools or removing the main wiring.
The coils which are available as conventional UC drives, electronic UC drives with or without remaining service life reporting or additionally with the AS interface communication interface can be used both for air and vacuum contactors.
3RT12 vacuum contactors are the right choice if you place significant value on extremely high performance and availability and increased personnel and plant safety. When compared to conventional air contactors, they offer a significantly higher electrical endurance. There are no arcs and no switching gases. This means that main contact wear and erosion are negligible.
Vacuum contactors are available in sizes S10 and S12 over all power classes from 110 to 250 kW/400 V. The technical and economic benefits of vacuum contactors are especially important in applications with a high switching frequency, for heavy-duty starting and for applications up to 1000 V.
In addition to the 3RT13 4-pole contactors with 4 NO contacts to switch ohmic loads there are also the 3RT15 SIRIUS contactors with 2 NO +2 NC contacts. These are used for instance to change over the poles of crane motors, as brake contactor or to switch two loads separately from one another.
3RT16 capacitor contactors are used to switch power capacitors which are used for reactive current compensation. Special series resistors and auxiliary contacts, integrated in the capacitor contactor, reduce the high inrush current of the capacitor which would otherwise flow. This reduced inrush current guarantees a high contactor and capacitor life time.
These contactors are available in sizes S00, S0 and S3 and can generally be equipped with the standard accessories of the basic devices.
SIRIUS IEC Overload Relays @ Siemen
SIRIUS overload relays are available in thermal and solid-state versions. The can be directly mounted to SIRIUS 3RT contactors and 3RA reversing contactors or separately mounted in the control panel.
3RU1 thermal and 3RB20/21 solid-state versions provide current-dependent overload protection of motor loads.
The modular 3RB22/3RB23 solid-state overload relays offer a higher level of functionality and protection. These devices not only protect your loads as a function of the current, but also as a function of the temperature when a PTC thermistor sensor is connected. The PTC sensor directly measures the temperature of the motor windings which is then evaluated by the relay.
SIRIUS 3RU1 and 3RB2 Overload Relays
SIRIUS overload relays, that are available in thermal (3RU1) and electronic versions (3RB2), provide in the main circuit current-dependent overload protection of electronic loads (e.g. motors) as well as other switching and protective devices in the particular load feeder.
The advantages at a glance
- Variants reduction due to setting range of 1:4
- Cost reduction due to less power loss
- Solutions for standard/heavy load starting: CLASS 5, 10, 20, 30
Protecting with 3RB22/3RB23
Our modular solid-state 3RB22/3RB23 overload relays – that provide full motor protection – offer the highest level of functionality and protection. These devices not only protect your loads as a function of the current, but also as a function of the temperature because a PTC thermistor sensor is connected. The PTC sensor directly measures the temperature of the motor windings which is then evaluated by the relay.
The advantages at a glance
- Variants reduction due to setting range of 1:10
- Full motor protection by a connected PTC-sensor
- Transmitting operating data/communication via analog output
- Our SIMOCODE pro motor management system is the optimum choice if you wish – in addition to the features of the 3RB22/3RB23 relays – to have even more extensive control functions. These include user-friendly diagnostic capabilities and high-performance communications with PROFIBUS DP.
SIRIUS IEC Motor Starter Protectors @ Siemens
3RV10 Motor Starter Protectors (MSPs) are built for a wide range of applications and meet the requirements of control users worldwide. Each MSP features a manual ON/OFF switch, a Class 10 adjustable bimetallic overload relay (Class 20 available in the two largest frame sizes), and magnetic trip elements for short circuit protection.
The 3RV10 MSPs can be used in a variety of applications;
- As a Manual Motor Starter.
- As a Manual Self-protected Combination Motor Controller, Type E.
- As part of a Combination Motor Controller Type F.
- As an IEC Circuit Breaker for export.
Lighting and Heating Contactors
Siemens offers a comprehensive line of lighting and heating contactors and a wide range of control solutions for lighting applications.
Contactors can be used individually for simple control schemes or as integral components in full-featured lighting control systems. Siemens contactors for lighting control provide reliable and efficient means of local or remote switching of lighting as well as non-inductive loads. The rugged construction, heavy-duty ratings and a wide selection of control options and accessories makes the Siemens lighting and heating contactors the right choice for your applications.
Electrically Held Contactors, Class LE
Siemens Class LE electrically held lighting and heating contactors are used in applications where it is not critical that the contacts remain in the closed position during loss of control power.
Mechanically Held Contactors, Class CLM
Siemens Class CLM magnetically and mechanically held lighting and heating contactors are used in applications where it is critical that the contacts remain in the closed position during loss of control power. These contactors do not change state and disconnect power from the load during a loss of control power whether momentary or sustained. That is because the operating coil is not required to be continuously energized.
Since the coil is not continuously energized, energy is saved and coil hum is eliminated. This makes the contactor ideal for applications where quiet operation is critical.
Manual Starters and Switches
A manual starter is a motor controller whose contact mechanism is operated by a mechanical linkage from a toggle handle or push button which is in turn operated by hand. A thermal unit and direct acting overload mechanism provides motor running overload protection. Basically, a manual starter is an “ON-OFF” switch with overload protection. Siemens manual starters and switches are used in many applications for local control of equipment in the industrial or construction markets, such as operating power saws, pumps, fans, conveyors, blowers, packaging, sorting and other machinery. These starters are UL listed and CSA approved. Siemens offers a variety of manual starters for various applications. This is a test.
Class SMF fractional horsepower starters provide On-Off control for small single phase motors up to 1 HP AC or up to ¾ HP DC. It also can operate two speed AC, single phase, one or two poles motors.
- Continuous current rating 16 amperes
- Overload trip assembly
- Two speed starters
- Heater elements to protect motors from overload currents
Class MMS and MRS
Class MMS and MRS manual motor switches and manual reversing switches are designed to operate single- or three-phase AC or DC motors. Overload protection should be provided externally. Applications for two speed motors can also use these switches.
- Continuous current rating 30 amperes at 250 volts max, 26.4 amperes at 277 volts, 20 amperes at 600 volts max, 30 amperes resistive at 600 volts max.
- Two Speed – Class MRS
- Reversing – Class MRS
Class 11 - 3RV
Class 11 3RV across the line manual motor starters and switches provide local control for single- or three phase motors up to 15 HP. Starters have bimetallic heater elements to provide over-current protection.
- ON/OFF rotary handle with lockout and visible trip indication
- Adjustable dial for setting to motor FLA (Starters only)
- Low Voltage Protection
- Short circuit trip at 13 times the maximum setting of the FLA dial or rated current
- Ambient compensated up to 140 degree F