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Pressure switch - Would you like to control switching processes in a technical system that are triggered by changes in the pressure of a gaseous or liquid medium? Then you need a pressure switch. Here you can learn a little more about the history, the tasks and the operating principle of pressure switches. Inexpensive and reliable pressure switches for switching valves or pumps are available here in the eibabo® online shop. Choose a model that suits your system from our range.What are pressure switches?Pressure switches are used to automate a pump or compressor. The basic principle of these switching devices is that connected devices:switched on when the pressure falls below a set limitoff when the upper pressure limit is reached Image: Eaton MCSN11-V pressure switchPressure switches have many names. The following terms are very common:Differential pressure switch, pressure limiter, pressure controller, pump relay, water pressure switch, air pressure switch or compressor switchThe devices are used, for example, in liquid tanks or gas tanks in which the filling level or the internal pressure of the medium contained therein is to be monitored. This ensures that certain values are not exceeded or fallen below. Alternatively, when a critical value is reached, switching processes are triggered in order to restore the desired or programmed normal state. A distinction is made between mechanical and electronic pressure switches, which offer individual advantages depending on the desired area of application.The history of the pressure switchIn the past, pumps and compressors were switched on and off mechanically and required constant human intervention. In the early 1930s, August Frede Maschinenfabrik (today: Condor-Werke) developed a simple and functional device that was equipped with a membrane and worked according to a spring principle. This first pressure switch should automate the switching on and off of pumps or compressors. In 1935, the company received the world's first patent for a diaphragm pressure controller for the automatic control of pumps. To this day, Condor-Werke is one of the global market leaders in the development and production of pressure switches.What are the advantages of a pressure switch?A pressure switch allows full automation of the start-up and shut-down process, eliminating the need for human involvement in managing the pump or compressor. An automatic shutdown when the upper pressure limit is reached guarantees the safety of the respective system. If pumps or compressors only work within a certain pressure range due to intelligent switching processes, energy costs can be significantly reduced and resources saved. TIPBe sure to note the installation location and, accordingly, the moisture protection of the pressure switch. In addition, pressure switches are very reliable and durable.The mechanical pressure switchDepending on the design, pressure switches can work mechanically or electronically. Mechanical type devices are more common due to their reliability, durability and simplicity. The mechanical pressure switch can be installed directly on site with minimal effort.NoticeHigh-quality pushbutton switches have non-stick silver-plated contacts, a high-strength diaphragm and fine-tuning capabilities. Especially with cheap goods from the Far East, the lack of these properties can lead to failures and unreliable switching operations. Here in the eibabo® online shop you only get reliable quality goods from well-known brands.The functional principle of a mechanical pressure switch is essentially based on the combination of a membrane with a block of adjustable springs. The pressure of the working medium is transmitted through the diaphragm to the working pressure setting springs by means of nuts or screws. A differential pressure setting spring measures the value of this compression. If the compression of the working pressure setting springs exceeds a certain value due to the pressure of the diaphragm, the differential pressure setting spring opens the contacts in the contact block and the pump or compressor is switched off. When the pressure drops, the tension in the springs relaxes again and the compression decreases. The mains contacts then close again and the connected device is switched on again. Depending on the version of the pressure switch, there may be additional outlets for connecting a pressure gauge and safety valves.The electronic pressure switchAn electronic pressure switch is actually a complete pump controller. As a rule, these devices include elements for soft starting, protection against dry running, as well as ways of setting the upper and lower thresholds of the operating mode of the pump or compressor. The advantages compared to a mechanical pressure switch are the smaller dimensions and the setting principle. Sensitivity adjustment screws are located on the electronic pressure switch body.How do I protect myself from my system running dry?The cause of failures in the operation of pumps or compressors is often the lack of the required working medium in the system. This problem is annoying and affects the reliability of all components. Idling leads to overheating or damage to parts and the associated failure of the entire system. To avoid this, when choosing a pressure switch, please consider the characteristics and allowable ratings for the operation of your pump or compressor. You avoid the danger of idling as follows:Buy a device with dry-running protection. These devices are a bit more expensive, but respond very effectively to pressure drops.Invest in the installation of a controller that not only monitors the pressure. This would, for example, also switch on the pump if the actual values fall below the set target values. How do I choose a pressure switch?When choosing a pressure switch, it is necessary to determine the type of pressure switch, the required functionality and the operating pressure:Should the switch monitor the pressure of liquids or gases?Does the switch have to be able to withstand chemical compounds?In which key figures is the working pressure range?How is the power supply designed for the switch (voltage, number of phases, current)?What sizes are required for the flange connections?What additional components and options are desired? Examples of this would be: start button, thermal relay to protect the electric motor, dry running protection relay for pumps, relief valve to make starting compressors easier and so on. When installing a high-quality pump, please remember that the pressure switch should also be of the same quality. This is the only way to ensure reliable operation. by the wayThe manufacturers of high-quality devices carry out long-term tests with the pressure switches in the laboratory in order to guarantee more than half a million switching operations. Use our detailed search to select your pressure switch. There you can precisely set the parameters of the switch you want and filter accordingly.  Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Pressure switch you will find items from the following product groups:Item overview:Compressor switchCylinder switchDifferential pressure switchPressostatPressure limiterPressure monitoring devicePressure regulatorPressure sensorPressure sensorsPressure switchPressure transducerPressure transmitterTwo-position controllerVacuum monitorVacuum switchfrom the following manufacturers:Manufacturer overview catalogue Pressure switch:Alre-itBaumerBourdon-HaenniCondorDoepkeEatonElsterEndress + HauserHeliosHoneywell FemaIfm ElectronicIpf ElectronicJumoMaicoNE-MARockwellSchneider ElectricSickSMC Deutschland
Fan switch cabinet - What to do if too much heat is generated in the control cabinet? Install fans or install air conditioning? Is an additional filter necessary? Where are the differences? We clarify. Prevent excessive temperatures in the control cabinet and protect your sensitive technology from defects and a shortened service life.With the use of technical devices, heat is always generated. Under normal circumstances this is not a problem. However, the more technology is installed in your control cabinet, the more likely it is that the temperature will rise above a critical value. When heat builds up in that small space, it's time to take countermeasures. With the eibabo® control cabinet fans, you ensure a better climate and protect your sensitive electronics from damage caused by overheating. The fans of the individual fans are designed and dimensioned differently depending on the model. This means that you too will find the best solution for optimal convection in the control cabinet.Position devices correctly in the control cabinetIt would be best if you didn't need separate cooling or ventilation for your control cabinet. Additional cooling and ventilation of the cabinet body always poses several challenges.You need a device.The device must be assembled.A power supply must be established.Regular maintenance should also take place. However, improving the natural flow of air is often enough to solve some problems. The first and perhaps most important step is to correctly position the components in the control cabinet. Devices that emit a lot of heat should not be placed close together. The wiring must also be laid properly so that the air has the opportunity to circulate. In order to increase the natural flow of air, there should be ventilation openings with grilles and filters in the upper area of the control cabinet. As soon as a natural air flow is possible, the warm air circulates and rises more easily. In many cases, this already improves the control cabinet climate. If this is still not enough to noticeably reduce the temperature, installing a fan or fans can be very effective. You have already created the conditions for the best possible air circulation by optimizing the device positions.Does it really make sense to buy a fan for the control cabinet?Installing air handling units for switch cabinets may seem like another unnecessary expense. Compared to the value of the devices in the control cabinet, however, these costs can be neglected even for high-quality fans. However, if this is omitted or the wrong fan is selected, the entire control cabinet can overheat. This not only jeopardizes the value of the devices contained therein, but also the actual function of the system. This can be the power supply for an entire process flow in a factory or the provision of the computer network within a data center. The consequences of such a failure have far-reaching consequences. Therefore, the installation of a comparatively inexpensive ventilation system makes sense in any case. TIP:Overheating of expensive devices due to the lack of active ventilation is one of the main reasons for their failure. Effective ventilation extends the service life and significantly increases the energy efficiency of the devices. A simple solution for good ventilation of the control cabinet is a combination of ventilation device and filter unit. In complex systems, ventilation systems are already part of the standard equipment of a control cabinet and are an essential part of the system design. If you would also like to increase reliability, simply take a look around in this catalogue. You will find the right fans and filters for almost every requirement.How do I choose the right fan for my control cabinet?When choosing the right ventilation system, you should consider a few things. Ventilation is basically intended to cool the devices in the control cabinet, not to heat them. Yes, even cold and frost damage the technology. So if you have a problem with temperatures that are too low or condensate for certain reasons, air conditioning units or heaters for control cabinets are more suitable for you.In order to ensure optimal ventilation and a long service life for the devices installed in the cabinet, the dimension and capacity of the ventilation devices must be calculated and selected correctly. The calculations themselves can be done expensively using manufacturer software, or quite easily done manually. For this you need:the difference between the maximum ambient temperature outside the control cabinet and the maximum permissible temperature inside the control cabinetthe heat loss behavior of the devices installed in the control cabinet in watts On the Internet you will find tables and diagrams in which you can read off the required ventilation performance (air volume in m³) based on these two values. Please note that this is a simplified calculation. Other conditions not considered here are:the size of the closetthe size and position of the openings for supply air and exhaust airthe cabinet material, installation conditions or installation environment and its insulationthe atmospheric pressurethe type of installation of ventilation High quality fans should have ball bearings. Also note how easy it is to dismantle the filter material on the ventilation grille. The cover should be easily removable to access the filter media. With a classic ventilation system, the fan first sucks the air through the air slots and then through a filter into the housing. The warm air exits through another filter mesh, which should be at least the same size as the intake. If necessary, this can also be larger in order to improve the flow behavior. Control cabinet fans must provide adequate protection against dust and splash water in order not to reduce the degree of protection of the control cabinet. Therefore, when buying, pay attention to the relevant information from the manufacturer, the presence of seals and the shape of the slats.NoticeIf the required air exchange cannot be achieved by the built-in fans and filters, there is a wide range of additional axial fans and centrifugal fans to choose from. If required, you will also find powerful air conditioning units for control cabinets here in the shop.Axial fans are typically used as exhaust fans to extract heated air from the system. When equipment is tightly housed in an enclosure, even exhaust fans may not suffice. In such cases, centrifugal fans are often used to blow cold air into the enclosure from the surrounding space, usually from the bottom of the cabinet.How and where are control cabinet fans installed?Control cabinet fans are usually used in the lower area of the control cabinet. Depending on how the cabinet is fixed (wall mounting, built-in, free-standing), choose a suitable position in a side wall, at the back or in the door. Since warm air rises, the exhaust air grille with filter is also installed on the top of the control cabinet. If you decide to use a duct in the ceiling of the cabinet, please consider the risk of inflowing liquids.Image: Rittal SK 3240.124 TopTherm filter fanUnder what circumstances should I better choose an air conditioner?There are conditions in which a classic ventilation system is no longer sufficient. If, for example, the air temperature outside the cabinet is too high or the quality of the air is too bad, an enclosure air conditioning system can be an alternative. These are designed in such a way that excess heat from control cabinets and device housings is dissipated to the environment. Use a control cabinet air conditioning system if:the ambient air contains too much humiditythe temperature inside the housing must be equal to or lower than the ambient temperaturethe ambient air is very pollutedthe required heat dissipation cannot be provided by the environment To make it easier for you to choose from our large range, the products are already sorted by relevance as standard. You can get high-quality control cabinet fans from eibabo® from top brands such as Assmann, Eaton, Hager, Rittal, Phoenix, Schneider Electric, Stiebel Eltron and many others. To find an item with special performance data, please use the extensive detailed search. For your secure purchase, simply use one of our convenient payment methods. In addition, your purchase is protected by Trusted Shops buyer protection. We ship worldwide.  Catalogue content:In this eibabo® catalogue Cabinet enclosures > Ventilator (switchgear cabinet) you will find items from the following product groups:Item overview:Axial fanCabinet ventilationCentrifugal fanControl cabinet air conditioningControl cabinet fanControl cabinet ventilationData centerDehumidifierDistribution cabinetExit filterExpansion systemFanFan extension kitFan kitFan moduleFan plateFan systemFan trayField distributorFilter fanFilter housingFilter insertFire protection fanHeat exchangerHigh current systemIndoor fanPressure fanSlot fanfrom the following manufacturers:Manufacturer overview catalogue Fan switch cabinet:Ebm-PapstEnocFinderHagerPentairPfannenbergPhoenixRittalSchneider ElectricSchäfer IT-SystemsSiemensStiebel Eltron
Radio transmitter - Would you like to automate an existing electrical installation at low cost without having to open walls and lay many lines or cables? Do you want to retrofit or expand your smart home? Then both radio transmitters and radio receivers belong on your shopping list. Find out more here about the possibilities that radio transmitters and radio receivers offer you. Radio technology has become an integral part of our everyday life. Think of radio signals, television and mobile phones, the Internet and many other things.WLAN or Wi-Fi?WLAN is a wireless radio network limited to a local area. Wi-Fi is more of a brand name of a consortium of companies (Wi-Fi Alliance). For example, devices labeled 'Wireless Fidelity' receive WiFi.In the field of radio transmitters, there are numerous device types and standards, such as Wi-Fi, Bluetooth, NFC and cellular.What are radio transmitters?A radio transmitter is an electronic device that generates radio waves. In the field of electrical engineering, the device mainly transmits control signals, switching signals, error messages and status messages. In telecommunications, radio transmitters are used to transmit or send data using an antenna. The transmitter converts the information into a high-frequency alternating current, which is radiated from an antenna as radio waves. Already knew?The Solt transmitter of the Hungarian 'Kossuth Rádió' is the most powerful radio transmitter in Europe. The program can be received in the USA and South Asia. Depending on the type of device, the radio waves are emitted in a specific band of the electromagnetic spectrum. The division into bands serves to fulfill a wide variety of communication tasks. This includes the transmission of voice, images or very general data. The transmitter uses the current of its power source to provide alternating current according to its bandwidth in the required wavelength. This is the frequency at which the alternating current changes direction per second. The electromagnetic waves or radio waves are radiated outwards as a weak signal via a carrier medium (e.g. the air) via the antenna. A corresponding receiver reverses this process and amplifies the incoming signal in order to be able to process the actual message or data. A transmitter can be a separate device or an electronic circuit in another device.Image: Eltako FSM61-UC wireless transmitter moduleHow is a radio transmitter structured?A radio transmitter requires an energy source that supplies the device with power and the energy for transmission. An electronic oscillator creates the radio waves and a modulator inserts the actual data into the radio wave. It does this through small variations in the properties of the carrier wave. A high-frequency amplifier increases the power of the signal. This increases the range. And finally, an antenna tuner matches the impedance of the transmitter to that of the antenna. This makes the energy transfer to the antenna efficient and prevents what is known as a 'standing wave' (reflection of the energy from the antenna back to the transmitter).How important are radio transmitters in building automation or the electrical installation?You use radio transmitters when there is no power line or bus line at a certain point in your installation. There you position a radio receiver, which receives the signals from the transmitter and takes over the desired tasks. These can be switching actions and control functions or the display of information. Radio transmitters are therefore an alternative when flexible installations are desired. Radio transmitters are also suitable if you want to retrofit existing analogue installations and device controls. Radio transmitters are a simple and inexpensive solution for home automation and are used to increase living comfort.You can get a large selection of radio transmitters in the eibabo® technology storefor flush mounting (radio transmitter modules, universal transmitter)for operation (radio buttons, KNX remote controls, hand-held transmitters)for control (wireless weather stations, multiple wall switches, room temperature controllers, wireless window contacts and other sensors) from all well-known manufacturers. These include top brands such as SOMFY, Rademacher, Warema Sonnen, Eltako, Schalk, Sommer and Jung. You will also receive devices and accessories from Hager, Eberle Controls, Berner Torantriebe and EVN Lichttechnik. We also offer elegant wall transmitters that are suitable for flexible installation on wallpaper, glass, mirrors, tiles or wood. Or you can select immediately functional wireless motion detectors, wireless switches or wireless sets from our range.What is the range of radio transmitters in electrical engineering?The range of radio transmitters can vary greatly. This depends both on the radio technology used and on the environmental conditions. Ranges between 20 meters and one kilometer are usually specified. The specifications in the product information about the maximum range are usually values under optimal conditions. These exist when there is a direct line of sight between the transmitter and receiver without obstacles and the area is not affected by interference signals from the same or a neighboring frequency band. Please keep in mind that these conditions rarely apply and the range will therefore be lower in practice. TIP:When installing radio transmitters, allow for a range reserve of 25%. The reserve is not only used to compensate for a lower range due to current obstacles. If further obstacles are added later (e.g. additional walls or growing trees), the devices can still be used.What is an I/O radio module?I/O radio modules are so-called transceivers, a combination of transmitter and receiver. These therefore have signal inputs and signal outputs. This makes it possible to control or monitor systems with just one radio link. In addition to digital interfaces, some models also offer analog inputs for transmitting sensor values and limit values.What do I have to consider when buying radio transmitters?If you want to use radio transmitters, you need additional receivers that pick up the signals, process them and react accordingly. This can be, for example, switching actuators, universal displays or radio-controlled sockets. To ensure that communication between transmitter and receiver works, all components are parameterized using the standardized 'Engineering Tool Software (ETS)'. In this way, each device knows under which conditions it should send or receive commands and how it has to react to changes. The ETS software is available from www.knx.org and is a tool that you need to commission and link KNX devices. Don't worry: programming skills are not required. The ETS is also suitable for laypersons who are interested in the logic of the KNX. Please make sure that your radio transmitter can take over the transmission tasks you want and carry them out correctly. We therefore recommend that you carefully check the parameters and functions for the ETS provided by the manufacturer before purchasing.  Catalogue content:In this eibabo® catalogue Optical and acoustic signalling equipment > Radio transmitter you will find items from the following product groups:Item overview:Access controlAdjustment toolAwning radio sensorBlind controlBuilt-in transmitterButton inputCall forwardingControl unitExternal controlFour-channel hand-held transmitterInterval transmitterMicrohand transmitterRadio remote controlRadio transmitterRain sensorReed contactRemote controlSecuritySetting aidShutter buttonSingle-channel hand-held transmitterSun protectionTransceiversUniversal transmitterWind automaticWindow contactWireless technologyWireless wall buttonfrom the following manufacturers:Manufacturer overview catalogue Radio transmitter:Berner TorantriebeBusch JaegerEberleEltakoEthermaEVNGiraGlen DimplexGrotheHagerHamaJungNovarPhoenixRademacherSchabusSchalkSchneider ElectricSiemensSomfySommerWAGO
Safety lamp - Don't panic now! Keep calm and leave the building as quickly as possible! Of course, none of us want to experience such a scenario. Nevertheless, situations can arise that require immediate action or at least special attention. Safety lights help for this purpose. These warn of dangers, show us the shortest escape route or illuminate danger spots so that you don't inadvertently injure yourself.With the eibabo® safety lights, you ensure that potential dangers are identified more quickly, damage is avoided and, in the first instance, evacuations can be carried out quickly. Many safety lights are equipped with economical LED technology and are therefore also designed for efficient continuous use. Your purchase in the eibabo® technology store is also particularly secure. This is ensured by the Trusted Shops buyer protection and a high level of customer satisfaction. Use one of over 20 payment methods and have your order delivered worldwide. And should something not go to your satisfaction, our accommodating customer service will be happy to help you.What types of safety lights are there?In emergency situations related to the failure of the main lighting, emergency lighting systems are used. These can be caused, for example, by power failures, fires or accidents caused by people. The purpose of safety lights is to:enable safe evacuation of people from buildingsindicate potential security risksensure the completion or continuation of work in progress (backup lighting) Depending on the type of lighting, these are connected to the existing house electricity network, connected to backup energy sources or function independently using their own energy supply. While backup lighting allows ongoing activities to be terminated or resumed, evacuation and hazard detection lights are designed to:indicate escape routesTo illuminate danger zones - such as moving machine parts, crash sites, tripping hazards, black ice, fire zonesAvoid panic - crowds of people are guided to the escape routes with instructions Image: Ceag ExitCube #40071353420In which areas should safety lights be used?Safety lighting is rarely found in the private sphere and is generally not required. Safety lights should still be present in those private buildings and areas:where critical crowds can occurwhere visitors and other public traffic are to be expectedif there is at least one branch from the exit of the apartment to the elevator or stairs And of course, the following buildings, among others, must be equipped with safety lights:high-rise apartment buildingsall public, commercial and industrial facilitiesCovered and open areas of petrol stations, multi-storey car parks and traffic tunnelsObjects that are characterized by a high number of visitorsestablishments with retail sale of alcohol  Please noteThe exact regulations differ depending on the country and can be found in the national regulations for escape route marking. Emergency lighting, which is not related to the evacuation of people, is necessary:in production with a continuous technological cyclein medical facilitiesat airports and train stationsin all other establishments where even a brief cessation of activity may result in death or accidents How are escape routes and danger areas illuminated?Illumination for evacuationThe main aim of marking escape routes is to leave the building safely and as quickly as possible. The route to evacuation starts right from the premises of housing, work or using services. Therefore, an evacuation lamp and a light indicator with the appropriate pictogram should be installed above the exit from the room. Other important marking points along the escape route are changes in the direction of movement and the floor, flights of stairs, entrances and exits.Already knew?A universal and globally understandable pictogram for escape routes is the green human silhouette walking through a doorway. Often this sign is accompanied by a directional arrow.emergency lightingIn addition, there are devices for emergency lighting along the entire escape route up to the exit from the building to the outside. In addition to the trend-setting infographics mentioned, these are also actual lamps for illuminating the floor, walls or steps. On the other hand, the escape route lighting also serves as escape route lighting for orientation for helpers and rescue personnel. This shows the way to safety zones and provides information about where, for example, fire extinguishers or first-aid equipment is located.Always recognizableAll signs identifying evacuation, hazardous areas, and emergency equipment locations must be sufficiently visible and recognizable. The minimum character height is calculated based on the maximum viewing distance divided by 200. Example: With a maximum viewing distance of 15 meters (= 1500 cm), the infographic must be at least 7.5 cm tall.hazard lightingThe purpose of hazardous area lighting includes protection of open chemical tanks, moving machinery, high-pressure vessels, electrical voltage, furnaces, and so on. Unguarded fall areas, escalators or automated production areas are also marked in this way.What is anti-panic lighting?If potential crowds of people are to be expected indoors and outdoors, this could cause difficulties for some people in finding escape routes. Anti-panic lighting should prevent uncontrolled stressful situations in an emergency and ensure that escape routes can be identified from any point in the danger zone. This is done through good lighting, clear instructions and unambiguous infographics. All of this reduces confusion and promotes calm and organized movement to the emergency exit when an alarm is announced.What is backup lighting needed for?The main task of backup lighting is not related to the evacuation of people. There are facilities where numerous important technical processes and humanitarian services take place. These cannot be interrupted. These include hospitals, certain authorities, airports, train stations or military facilities. This is where back-up lighting systems come into play to prevent human injury or death or the occurrence of other man-made accidents. TIPThe presence of backup lighting does not exclude the need for evacuation lighting with all the necessary indicators. The use of separate lights for backup systems is usually not economical. Rather, if the main power supply fails or is interrupted, the standard lighting is automatically switched to a source from the central emergency power supply. The running time of such a back-up light is calculated for a period of between a few minutes and several hours, depending on the setup.  Catalogue content:In this eibabo® catalogue Luminaires > Emergency luminaire you will find items from the following product groups:Item overview:All-plastic lampCeiling lightCentral battery emergency lightCompact guardComplete deviceDisc lightEmergency exit lightEmergency light insertEmergency lightingEscape route lightEscape Sign LuminaireExit sign panel lightIndicator lightInterior lightLight signalMounted lightMounted spotlightMultivariableOutdoor lightOutdoor motion detectorPictogramPressure switchRound lightSafety lightSecurity lightingSelf-contained lightSingle batteryToledoFlatfrom the following manufacturers:Manufacturer overview catalogue Safety lamp:ABBCeagESYLUXFischerIDVLegrand BticinoRidi-LeuchtenRP-TechnikRZBScharnberger+Has.SchuchSitecoSLVStahlZumtobel
Soft starters - Would you like to avoid suddenly occurring high starting currents when switching on an electric motor, reduce wear and tear on the motor and thus extend its service life? Find out here how a soft starter works and which criteria you can use to select such a device.What is a soft starter?Soft starters, soft starters or soft starters can basically be used in all electric motors. The devices are used in particular for asynchronous motors that are operated with alternating current. The starters work according to the fact that the torque developed by the electric motor is proportional to the square of the starting current and, correspondingly, proportional to the applied voltage. Thus, with a soft starter, by reducing the voltage at the moment the motor starts, you can adjust the torque and current. So, the task of these devices is to keep the motor parameters (current, voltage, torque and so on) within safe limits during the start. This is done to:to relieve the engine drive train when startingto limit the inrush currentto avoid a voltage drop in the mains voltageprevent the miniature circuit breaker in the circuit from responding too quicklyprevent engine overheatingEliminate dropouts and irregularities in the course of the mechanical driveextend engine life What is an asynchronous motor?To understand the importance of soft starters, we need to know something about the motors they are used in. Electric motors run on either direct current or alternating current. When it comes to AC motors, we mainly differentiate between asynchronous motors and synchronous motors. The difference between the two motor variants lies in the detailed design and the interaction between the rotor and stators in the magnetic field generated.Already knew?In a synchronous motor, the rotor speed is always equal to the rotational frequency of the electromagnetic field. In an asynchronous motor, there is a difference between the rotational speeds of the rotor and the rotating magnetic field in the stator.Asynchronous motors of small and medium power are the most commonly used electric motors and are used both in industry and in household appliances. In the industrial environment, three-phase asynchronous motors are used most frequently, for example as drives in construction, in traffic, in public utilities or as drives for water supply devices. The main problems of these engines are:the high starting current, which can be many times higher than the nominal current and thus leads to problems with the performance stabilitythe inevitable difference between engine torque and load torque. When switching on, the torque is often available in fractions of a second. This sudden force can lead to failure of the drive train. A soft starter avoids these problems by slowing the acceleration and deceleration of the motor. As a result, starting currents can be reduced and irregularities in the mechanical part of the drive as well as hydraulic shocks in lines and valves when starting and stopping the motors can be avoided.What is the starting current?The principle of operation of asynchronous motors is based on electromagnetic induction. The build-up of a back EMF from the application of a changing magnetic field during engine start-up causes transients in the electrical system. Definition transientTransients in electric motors are brief voltage peaks caused by switching on the electrical circuit. These transients can affect power supplies and other connected devices. When starting, the engine accelerates to full speed. Meanwhile, the starting current can reach many times the full load current. During this time, the cables must carry more current than when they are running. The voltage drop in the system is also much greater when starting up. This becomes especially clear when starting a powerful power unit or a large number of engines at once.This is why soft starters are increasingly being used when starting high-performance electric drives. The function of the starters is to supply voltage to the motor windings evenly from zero to nominal, which also allows the motor to accelerate smoothly to maximum speed. During the starting process, the soft starter gradually increases the applied voltage and the electric motor accelerates to the nominal speed without high torque peaks and current surges.How a soft starter worksYou have now learned about the main problems involved in starting induction motors. Soft starters counteract these problems and can be either mechanical or electrical or a combination of both. Mechanical soft starters directly counteract the sudden increase in engine speed by limiting the torque, for example, with brake pads, fluid couplings, magnetic locks or counterweights.The electrically constructed devices gradually increase the current or voltage from an initially low level to a maximum voltage. This starts the motor smoothly and gradually accelerates it to its rated speed. These starters usually work with an amplitude control and can therefore also start up when idling or under load. Devices of the newer generation use phase control methods and also start drives with heavy starting.Image: Siemens 3RW4037-1BB04 soft starterWhat types of soft starters are there?Soft starters are phase controlled. Thus, three types of soft starters are used: devices with one, two and with all controlled phases. The first variant is applied to single-phase motors to provide reliable protection against overload and overheating, as well as to reduce the effects of electromagnetic interference. The devices of the second type usually contain a bypass contactor in addition to the semiconductor control board. After the motor has reached rated speed, the bypass contactor is activated and supplies DC voltage to the motor. The three-phase type is the optimal and most technically advanced solution. It provides reliable current and magnetic field strength limitation without phase distortion.What should you consider when buying a soft starter?The main feature of a soft starter is the current rating. This value should be 'many times' greater than the value of the current flowing through the motor winding. How high this 'multiple' is depends on the severity of the launch. When it comes to motors for fans or pumps, the starting current is about three times higher than the rated current. Certain saws or press machines are often devices with heavy starting. These are drives with a large moment of inertia. Their starting current is about five times higher than the rated current. For motors with particularly difficult starting, the starting current can be eight to ten times higher.Please noteA soft start takes time and excess energy is converted into heat. To repeat the starting process, the starters must cool down. Therefore, if your process requires frequent switching on and off, choose a soft starter for heavy or extra heavy starting (even if your machine doesn't actually need it).Decide on a device that controls the required number of phases. In addition, a soft starter works according to a preset program. In other words: The device increases the voltage to the nominal value within a certain time. An integrated control unit with feedback function allows you to control this process and compare voltage and torque or the differences between rotor and stator.If necessary, pay attention to the ability of the starter to work when accelerating or braking. This would require an additional, integrated auxiliary contactor that bridges the main circuit so that it can cool down. This prevents phase asymmetry and overheating of the motor windings. With some models, you can set certain parameters manually using a rotary potentiometer on the device or digitally using a microcontroller. Consider whether you need additional functionality or features. These include:a certain type of protectionthe presence of power saving modesrestart capabilityWorking at reduced speed  TIPA properly selected soft starter can double the service life of electric motors and save up to 30 percent electricity. With a soft starter from the eibabo® online shop, you are opting for high-quality goods from well-known manufacturers such as Eaton, Schneider, ABB or Siemens. If you want to control the speed of a machine not only at the beginning, but permanently, then the use of a frequency converter would be an alternative for you. Frequency converters are also available here in the online shop at top conditions.  Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Soft starter you will find items from the following product groups:Item overview:Direct soft starterDirect starterDrive technologyEngine starterPerformance starterSoft startSoft starterStarting deviceTorque controlfrom the following manufacturers:Manufacturer overview catalogue Soft starters:ABBDoldEatonFrankoniaKalejaRockwellSchneider ElectricSiemens
Indicator lights-complete - Indicator lights are components for optical signalling. You can use it to monitor all sorts of operating states and show their correct function with a simple ON-OFF display. For the private sector, for example, the control panel of the electric train is a classic place of use. Differently colored indicator lights can be used to show which point is set and how. In the industrial sector, indicator lights are of course used to operate machines and systems. Here they signal switching states or faults and thus contribute to the implementation of efficient work processes. The indicator light complete devices from the eibabo online shop are available in numerous signal colors, each with brilliant luminosity, have a high IP protection class, are robust and designed for industrial use and their function is not impaired by dust, oil or aggressive alkalis.Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Indicator light complete you will find items from the following product groups:Item overview:Built-in indicator lightCommand deviceComplete indicator lightDetectorIlluminated buttonIndicator lightIndicator light completeIndicator light complete deviceIndicator light conicalIndicator light with glow lampIndicator light, complete deviceIndicator lights for distributionLamp holder block for control circuit devicesLight signalLight signalling unitModular installation deviceModular signal lampMotor protection switchOptical signalOptical signallingPhase controlPhase indicator lightPressure switchPush buttonSeries installation signal lampSignal lamp for distributionSignaling deviceVoltage indicatorfrom the following manufacturers:Manufacturer overview catalogue Indicator lights-complete:ABBABLCeagEaoEatonMurrelektronikRafiRockwellScharnberger+Has.SchlegelSchmersalSchneider ElectricSiemensStahlStiebel Eltron

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