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Blind control - There are many ways to control blinds. Finding the right solution for your facility can be difficult. In this guide, we'll explain what options are available and help you make a purchasing decision. It doesn't matter whether you need a button for your existing control or are planning a blind control with high-end devices: In our online shop we offer you the complete range of products and solutions for your individual project ideas. In the eibabo® shop you will find high-quality products from leading manufacturers such as Peha, Jung, SOMFY, Schalk, Gira, Busch-Jaeger, Berker, Elso, Merten, Siemens, Warema Sonnen, Doepke and Rademacher. TIP:Plan the controls for your blind carefully. The choice of controller type is important and affects the day-to-day operation of your facility. In addition, numerous control options can influence other parameters of your building and its automation. These include, for example:the management of heating, ventilation and coolingthe energy consumptionthe fire protectionthe security systemand some more An intelligently planned and installed blind control contributes to comfort, security and energy efficiency. Connected sensors assume important comfort and safety functions. Some examples:Blinds, roller shutters and awnings can be controlled depending on the light using brightness sensors or twilight sensors.Precipitation sensors and wind sensors can automatically retract or raise awnings or shutters when the weather changes.Sensors for open doors support you in the implementation of lock-out protection. Once you know what you value, you can determine the optimal type of control. Manual control by hand is the simplest variant. This is the cheapest, not very convenient and offers no possibility for automation. With a wired blind control, you have convenient control options using buttons or switches (also with sensor evaluation). If you instead rely on an electronic blind control, you will benefit from time-dependent control options. You can also automate the daily operation of your blinds and shutters or simulate a presence. You can conveniently control your blinds with a blind control via radio. Complex installations can be avoided with wireless solutions. In addition, a radio blind control is an enormous gain in comfort: You can remotely control blinds, roller shutters or awnings with radio control buttons and radio hand-held transmitters.Wired control via switches and buttonsThe classic method of controlling blinds is to connect the motor cable directly to a switch. This gives you the option of moving the system up or down and influencing the opening. There are no other options. With this setup you control a single motor with a switch or button. This contact closure control can also be used for basic hardwired switching. This enables, for example, control via an alarm system, a fire protection installation or a building management system. To control multiple motors, you need to expand the installation.Image: Jung AT 04 WW awning controlThe use of relaysUsing a motor relay (disconnect relay) you can control multiple blinds from one switch. Group controls and individual controls are possible. The number of inputs on a standard relay determines the amount of individual or grouped motors that you can connect to the relay. Other functions are also possible with relays. Some relays have additional inputs. A classic safety function is the fire alarm. A signal on the relay's fire alarm input overrides all other controls. This allows blinds to be opened or closed automatically as soon as a fire alarm is triggered. Some relays are equipped with potential-free contacts for connection to a home automation or building management system.radio controlAlternatively, you can connect a radio remote controlled motor to a power source. Radio-controlled motors can be controlled using wireless wall switches or a remote control. If you want to operate each blind individually, you can use a separate controller for each motor.Electronic blind controlWith motor control via digital building management, you are absolutely flexible. Each motor has its own address within the network, regardless of the type of wiring. This makes your system fit for any adjustment or change in the future. For example, imagine dividing your parents' house into two residential units for the children. This may require some windows to be regrouped. You can easily change the switch positions for these particular blinds in software without having to physically rewire the building. You can use blind control to improve the energy efficiency of the house. In conjunction with sensors on the window, you can, for example, have the blinds opened or closed automatically. This means that daylight can be used optimally and electricity can be saved. The heat conditions caused by solar radiation also fluctuate throughout the day. Use automation to ensure a constant temperature. Use the sensors of a weather station with an astro function to automatically control the position of the sun on the blinds according to your geographical orientation or to ensure the slats are protected against ice.Use digital assistanceThere are numerous building automation devices that are compatible with your blinds and other devices in your home. These can be connected to digital assistants such as Amazon's Alexa, Google Assistant. This makes it possible to control the blinds using voice commands.Another option is to link the blind control with other automatisms in the building. For example, blinds can be closed depending on the activated alarm system or opened in the event of a fire alarm. The possibilities are manifold. All this increases comfort and improves the quality of life.Which blind control components do you recommend?In the eibabo® technology store you get everything you need to implement your individual blind control. We offer a large selection of blind controls and accessories for the current switch ranges from the most important manufacturers. Our product range includes, among other things, covers for switches and control devices, OPEN/CLOSE controls, roller shutter controls, blind controls and blind timers, control elements, radio controls and radio program timers, blind inserts (flush mounting), buttons and rockers, motor group relays and motor control inserts as well as motor controllers, program timers and timers.Use our intelligent search to put together your personal set. The products in this catalog are sorted by relevance. Popularity, quality and value for money are included in the sorting. This should make your selection a little easier. Use one of our many secure payment methods and benefit from cheap and fast worldwide shipping.  Catalogue content:In this eibabo® catalogue Domestic switching devices > Venetian blind control unit you will find items from the following product groups:Item overview:Automatic switchBelt case watchBuilding automationCentral controlDIN railDirect currentEngine control operationEngine control unitEngine control unitsEngine controlsGroup controlHome controlModular installation deviceOne button controlRademacherRadio timerRolloHomeControlSecurityShutter actuatorShutter controlShutter relayShutter switchShutter timerSun sensorTubular motor controlTwo button controlVenetian blind controlWind sensorfrom the following manufacturers:Manufacturer overview catalogue Blind control:BerkerBusch JaegerElsoEltakoGiraJungKaiser NienhausLegrand BticinoMertenPehaRademacherSchalkSiemensSomfySommerWarema
Combination rcd-line protection - What are the advantages of a residual current circuit breaker in combination with line protection? Where are these devices used? What specification should you look out for? Read this post to learn more. Electricity is an indispensable part of our life. But the fact is that electricity poses a risk to life and property. The main risks associated with electricity include electric shock and fire. Therefore, you should not be neglectful when protecting your circuits. The aim is to protect people from the risk of electric shock and fire. In the event of sudden ground faults, a residual current circuit breaker is particularly helpful. This ensures that in such cases the circuit is immediately interrupted. Circuit breakers are used in the event of overcurrents. With the combination of both devices you protect yourself against most dangers.Image: Hager ADZ316D residual current circuit breaker with line protectionWhat is combi FI line protection?Combination switches for residual current circuit breakers (FI) and line protection (LS) are also referred to as FI/LS combination switches. This FI/LS combination switch is a protective switching device that combines the functionalities of residual current circuit breakers and miniature circuit breakers. A residual current circuit breaker is an important safety measure when it comes to protecting electrical circuits. RCCB or RCD is also often mentioned. These are the abbreviations for the English terms 'Residual Current Circuit Breaker' and 'Residual Current Device'. It is a current sensing device that can automatically measure and disconnect the circuit. Disconnection occurs when a fault occurs in the connected circuit or the current exceeds the rated sensitivity of the device. Miniature circuit breakers are overcurrent protection devices when used in low-voltage networks. These are also called MCBs. MCB is the abbreviation for the English term 'Miniature Circuit Breaker'. Advantages:The combination FI line protection devices offer the following protection at the same time: short-circuit protection, overload protection, additional protection or error protection, protection against electric shock and preventive fire protection. While a residual current circuit breaker is only used to protect against earth faults and a miniature circuit breaker only to protect against overcurrent, the combination FI line protection protects against both types of faults.Where is combined RCD line protection required?The FI line protection combination devices we offer are used both in residential installations and in industrial applications. You can significantly increase the availability of a system with RCBOs. We recommend fitting a combi RCD to each individual circuit. Errors that occur in one circuit therefore do not impair the functionality of the other circuits. Assembly:The series installation devices are intended for installation in electrical distribution boards on the DIN rail. If you have electrical circuits that must remain functional at all times, a combi FI circuit breaker is the right choice. For example, think of the power supply for your aquarium, freezer or fire alarm. RCDs and miniature circuit breakers can still cause a power outage because they only detect one type of problem. In less important circuits, a residual current device or a simple miniature circuit breaker may be less expensive. However, consider their disadvantages when installing in critical systems.Can I replace a simple residual current circuit breaker with a combination FI circuit breaker?You can, of course, retrofit an FI/LS combination switch or replace your existing residual current circuit breaker with a combination FI circuit breaker. The prerequisite is that the cable sizes are appropriate considering the rating of the combined RCD. We recommend that the replacement be performed by a qualified electrician in accordance with the manufacturer's instructions and guidelines. He should check the resistance values and test the insulation. The isolation of the RCD combination switch should also perform within the appropriate specifications.What should I look out for when buying a combi RCD?When distinguishing between the individual RCBOs, please consider the tripping characteristics. Combination switches with B characteristics and C characteristics are available here. The key difference between Type B and Type C devices is their ability to tolerate surge currents without tripping. These are typically inrush currents in connection with reactive loads, which occur, for example, with lighting or motors (capacitive or inductive loads).Good to knowThe classification according to tripping characteristics is based on the nominal residual current at which instantaneous tripping occurs. This is usually less than 100 milliseconds. On the one hand, devices with high inrush currents should not trigger the RCBO combination switch unnecessarily. On the other hand, it should switch safely in the event of a short-circuit current.Type B devices are primarily suitable for domestic and light commercial applications. Here shift shocks are low or non-existent. Choose Type C equipment for commercial and industrial applications when you expect a certain level of electrical inrush current. In addition, there are devices of type D. These have only limited applications. Typically in industrial environments where high inrush currents are expected.Type B devices trip at fault currents that are three to five times the rated current. For example, a 10 amp device will trip at 30-50 amps.Devices with a C characteristic are designed in such a way that they trip at five to ten times the nominal current. A 10A device will respond at 50-100 amps. Choose a suitable model from a trusted manufacturer. The switching properties of cheap no-name devices can differ significantly from the specified values. Don't compromise on your own safety. In this catalog from the eibabo® shop you will find numerous residual current circuit breakers with line protection from leading manufacturers such as ABB, ABL, Busch Jaeger, Doepke, Eaton, Hager, Legrand Bticino, Schneider Electric and Siemens.Why does my combi RCD keep tripping?In addition to natural inrush currents, failure of connected equipment can trip a Type B combination switch in a residential or commercial environment. This is caused by high arc currents occurring at the time of failure. If unwanted trips persist, a Type-C device can replace a Type-B device, especially in commercial applications. Alternatively, it is possible to use a type B device with a higher power rating. Another reason can of course be a constantly present fault current in the installation or in the connected devices. Connected pluggable equipment should be removed in order to identify a defective device as the cause. If this is not the case, an electrician should be commissioned to check the electrical installation immediately. TIP:If a combination FI line protection trips, there is a reason. Increasing the tolerance threshold is only possible within certain limits. In this case, please look at your installation. The normal ratings for cables and wires refer to continuous operation under specified installation conditions. Of course, cables and wires can carry higher currents for a short time without being damaged. If the load becomes too high, please secure individual devices separately.  Catalogue content:In this eibabo® catalogue Circuit breakers and fuses > Earth leakage circuit breaker you will find items from the following product groups:Item overview:Circuit breakerCombination circuit breakerCombination switchEarth leakage circuit breakerLine protectionPersonal protection machineResidual currentfrom the following manufacturers:Manufacturer overview catalogue Combination rcd-line protection:ABBDoepkeEatonHagerSchneider ElectricSiemens
Binary input - What interesting possibilities does the use of binary inputs in building automation offer you? Learn more about differences, use cases, and things to watch out for on this page.What do you need a KNX binary input for?KNX binary inputs are used to convert conventional alarm messages, fault messages, operating messages or status messages (generally analog signals) into digital signals and connect them to the KNX bus.Image: KNX binary input universal - Hager TXA306 for KNX building automationWhat should you know before buying a KNX binary input?Take a look at your project and ask yourself the following questions:Is it a new installation or do I have to consider the properties of existing devices (e.g. switches)?Which signals or voltages should be recorded?What is the distance between the signal transmitter and the receiver?Do I need additional cables and lines?Should the control only be wired or also possible via radio?Which logic functions do I want to implement?and much more The answers will help you to make the right choice for a suitable binary input. Among other things, this results in the number of channels that your new binary input should have, which manufacturer supplies an application (software) suitable for the project and whether the binary input must be suitable for potential-free devices or not.What is the difference between the individual binary inputs?The binary inputs are often provided in the variants 20V, 24V, 230V and potential-free. Which one you need in each individual case depends on which signals you want to activate. Notice:The addition potential-free, 20V, 24V or 230V does not refer to the binary input, but to the signal to be recorded. potential-free binary inputsPotential-free means that no external voltages (potentials) may be connected to the inputs at these binary inputs, since the contact voltage (usually 10-20V) is already provided by the binary input itself. The potential-free variant is typically used for buttons, switches, door contacts (magnetic or reed contacts), window contacts (magnetic contacts) or auxiliary contacts. Magnetic contacts may often only be assigned a maximum of 20V DC. However, the maximum cable length that can be connected is often limited to between 50-100m, see the description of the respective potential-free binary input and can also be negatively influenced by inductive or capacitive loads in the area around the routed cable. Devices with wires that have already been brought out should generally not be extended at all, eg button interfaces (a button interface is also a binary input). 20V and 24V binary inputsModels with 20V or 24V are used when devices cannot switch potential-free. These are, for example, presence detectors or differential pressure monitors for stoves that work with 24V technology. 230V binary inputsThe 230 V version is often used to connect existing 230 V AC signals to the bus in order to evaluate them. For example for conventional 230V outdoor motion detectors, buttons, switches or other messages from other systems. Fuses can also be monitored in order to immediately notice critical changes in large building complexes, for example. What specific applications can be implemented with KNX binary inputs?The possibilities are diverse and depend entirely on your project. A KNX binary input detects a status change at its input. Depending on the parameterization that you carry out using the software (ETS), a telegram is then sent to the KNX bus. This information can then be integrated into other desired functional logic, for example:Open windows = set heating to standby/frost protectionLevel reached = open valveTo evaluate a conventional 230V motion detectionFor activation of conventional buttonsTo capture status or operational messagesEvaluate error messages from connected devicesand much more Or you use the information for displays on displays, for touch functions or for visualizations for evaluation purposes.What is ETS?ETS is the abbreviation for Engineering Tool Software. This is used to assign and parameterize certain actions, relationships or functions within the building automation. So you determine what a binary input should do with an incoming signal. Programming skills or learning a programming language are not required. If you are interested in logical connections and can imagine the later function in the building based on an abstract scheme, the creation of a project should be a solvable task for you.We recommendIn the case of particularly complex projects, it can be advantageous to hire an experienced system integrator to create the basic project. This is typically much faster than doing it yourself and you will receive a tested, error-free basic version of your system. Later you can easily change, add or remove individual parameters yourself.You can think of the configuration as similar to the folder system on your Windows PC or iOS computer. You create your own structure and save files in it. In addition, you create shortcuts to other files and folders based on certain conditions. In the ETS, the 'folders' are floors or rooms, for example, and the 'files' in them correspond to sensors and actuators that you can relate to one another.Can consumption also be recorded and evaluated with KNX binary inputs?At eibabo® you will also find KNX binary inputs to record counter values. You can order almost all conventional water meters, electricity meters, gas meters, heat meters and many more including an S0 interface (pronounced: S-zero interface). This is used to transmit measured consumption values for further processing in the building automation. The interface sends an impulse via a contact, which corresponds to a certain value of the measured medium. The pulse value is always the responsibility of the meter manufacturer.An example: If you buy a water meter with an S0 interface, the pulse value is on the meter or in the product description, for example 10 liters = 1 pulse. That means the contact closes and opens again (rising/falling edge, 30 ms = t_ON = 120 ms 30 ms = t_OFF) as soon as 10 liters of water have been consumed. Simply put, the signal is similar to when you press a button. You can evaluate these contacts using a KNX binary input with the application provided by the manufacturer for counting value acquisition.As a rule, potential-free 20V or 24V binary inputs are used for this, as the contact voltage may be a maximum of 15V (S0 interface class B, short transmission paths) or a maximum of 27V (S0 interface class A, long transmission paths).Are long distances critical for signal transmission?Pay attention to the technically required maximum cable lengths between signal detection and binary input contact, especially with 20V, 24V and potential-free. These are often a maximum of 100 meters and should be routed in a protected manner without inductive or capacitive cross-influences. TIP:Please refer to the manufacturer information for this. The individual brands and the different variants have individual limit values. This applies in particular when critical states are to be monitored, such as counting for billing purposes (LIYCY lines, cables).How are KNX binary inputs mounted?KNX binary inputs are available with eibabo® for different types of installation, for example for installation in an electrical distribution board. These devices are referred to as modular installation devices (REG). There are also binary inputs for flush-mounting (UP) or surface-mounting (AP) and for integration in ducts or similar (EB).Which manufacturers of KNX binary inputs are recommended?In this eibabo® catalog you will find everything on the subject of KNX binary input, binary input device, binary input module, button interface, universal interface, input module, button coupler and evaluation unit. Well-known manufacturers are ABB, Berker, Busch-Jaeger, Doepke, Eaton, Elsner, Elso, Eltako, Gira, Hager, Issendorf, Jumo, Jung, Lingg & Janke, MDT, Merten, Peha, Siemens, Theben and Warema.Trust our experienceWe have been working with the products from these manufacturers for over 25 years and have been able to use them in hundreds of projects around the world.We have always paid attention to quality and reliability when realizing our projects. Because permanently error-free functionality is crucial, especially in complex building automation installations.  Catalogue content:In this eibabo® catalogue Installation bus systems > Binary input for bus system you will find items from the following product groups:Item overview:Basic moduleBattery poweredBinary inputBinary inputsBus technologyButton inputCombination actuatorControl unitDIN railEngine control unitExpansion moduleFlush-mounted boxInput couplingInput moduleInterfaceLighting controlNormally open outputPanel adapterRadio systemShading controlShutter controlSocket coverStatus indicatorSwitching outputTactile sensorUniversal interfacesWireless reed contactWireless solutionfrom the following manufacturers:Manufacturer overview catalogue Binary input:ABBBerkerBusch JaegerEatonElsnerElsoESYLUXfrogblue AGGiraHagerIssendorffJungLingg & JankeMDTMertenPehaSchneider ElectricSiemensThebenZumtobel
Load break switches - Do you want to disconnect circuits safely under load? Then you need a switch disconnector. But what do you have to pay attention to when buying a load-break switch? Switch disconnectors are available in many different versions. We give you an overview of the different models and help you to make the right purchase decision.What are switch disconnectors?Under normal conditions, load switches can switch and carry specified currents. Disconnectors, on the other hand, have a higher dielectric strength and lower leakage currents in the isolating distance. The switches must under no circumstances switch themselves back on automatically as a result of environmental influences and must have a clear indication of the off position. In a load-break switch, the functions of a load switch are combined with those of a disconnector. So it is a combination of both. The device protects, switches and separates with a safe isolating distance. This means that a load-break switch can also be used to reliably disconnect or switch a circuit under load up to the respective rated current. In general, we distinguish between three types of switch disconnectors:The classic switch disconnectorClassic switch disconnectors are designed for easy disconnection of a system and are used, for example, as a main switch, emergency stop switch or as a repair switch / maintenance switch. These devices are suitable for frequent switching. In the eibabo® shop you can get products for standard applications, for high-performance applications and for remote controls. In addition, we offer standard infrastructure devices for mounting on DIN rails. Please note that with all these devices, the supply line must always be fused separately.Fuse switch-disconnectorThe fuse switch disconnector combines disconnection with a fuse in one device. With this device, the fuse is cut out when switching. This means: When disconnecting under load, a visible arc occurs. Fuse switch-disconnectors are intended for infrequent switching and are used in industry as main switches or in main power distribution. definitionIn electrical engineering, the term 'isolation' refers to the all-round disconnection (of a part) of a system from all non-earthed lines. Load-break switch with fuseSwitch-disconnectors with a fuse also combine the switching function with a fuse in one device. However, the fuse is activated when the device is switched off. This enables you to safely replace the fuse when it is disconnected. The devices are also designed for frequent switching and are therefore also suitable for high-power applications, as main switches and in the main power distribution.What do I use a switch disconnector for?Load-break switches protect people and machines and are used for:Activation of resourcesSwitching short-circuit currentspower shiftingProtection against overcurrentProtection against electric shock These can be used as the main disconnect device in switchgear, interrupting the power supply to one or more electrical circuits. It is possible to switch or disconnect the circuits even under load up to the level of the respective rated current. With a load-break switch, you separate electrical devices, for example for maintenance work and repair purposes. The aim of the switch is to safely stop the flow of current in order to enable authorized specialist personnel to work safely. It does not matter whether it is a simple or a complex installation. Load-break switches offer ideal performance characteristics for industrial use as on/off switches, main switches, motor switches, control switches, repair switches, emergency stop switches and much more. The function as an isolating switch and load switch makes these devices very economical, especially in small systems, because the use of additional isolating switches is not necessary.Image: Hager HAB406 switch-disconnectorWhat is the difference between a classic switch disconnector and circuit breaker?Switch disconnectors and circuit breakers perform different tasks. The switch-disconnector works with the simple objective. to disconnect the power supply. This allows electricians to carry out their maintenance work, repairs and inspections safely. A circuit breaker can take on more tasks than a load-break switch. A circuit breaker connects, carries and interrupts current under standard switching conditions. This is well suited to perform the duties of a disconnector or load switch. Like the load-break switch, it offers full disconnection if required. You can use the circuit breaker as a protective device because it can control the flow of current like a fuse. The device breaks the circuit under unfavorable conditions such as overload and short circuit. A load-break switch does not offer these advantages. Depending on the model, you can control a circuit breaker manually or automatically.Conclusion: A load-break switch serves as a disconnecting device to completely stop the flow of power and is often associated with a circuit breaker or a load switch. The circuit breaker works as a switching device to interrupt the short-circuit current and the rated current. To ensure maximum security, both devices usually complement each other.How do switch-disconnectors ensure safe disconnection of the current flow?Shifting under load is a special process. Sparks and arcs can occur when two conductive contacts are separated. These allow the current to continue to flow, although the contacts are no longer touching. With small currents, a sufficiently large distance between the contacts prevents the sparks from 'jumping over'. These go out by themselves without making a new electrical connection. If this distance is too small compared to the applied voltage or if the contacts are insufficiently insulated, arcs can form.Electric arcAn arc occurs when there is a high electrical charge difference between two poles. To compensate for this imbalance, a channel forms between the poles. Inside, gas (e.g. air) is ionized and a plasma is created. The current can flow through this plasma channel.These arcs must be extinguished using special protective devices in the switch. Load-break switches and circuit breakers are therefore equipped with specific extinguishing agents in order to stop the energy flow of the arc in good time. Depending on the type of circuit breaker, these are air, oil, insulating gas or vacuum. Special chambers for deionization (arc quenching chambers) are typically used in switch-disconnectors in the low-voltage range. These artificially lengthen the arc until the voltage required to maintain it becomes too great. The arc breaks off and quenching plates prevent it from igniting again.Which switch-disconnectors are recommended?Depending on which requirements you want to meet, your eibabo® online shop offers you the right load switch, disconnector or circuit breaker. When it comes to switch disconnectors, you have the choice between all well-known manufacturers. These include ABB, Ceag, Doepke, Eaton, Elektra, Hager, Legrand Bticino, Siemens and many more.To make your selection easier, the items in this catalog are already sorted by relevance. Enjoy high quality at low prices as well as many secure payment methods and fast worldwide shipping.  Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Switch disconnector you will find items from the following product groups:Item overview:Auxiliary circuit breakerAuxiliary switchBasic switchCast pastedConstruction switchDistribution switchDiverter switchEngine switchFeed switchFuse bodyFuse switch disconnectorHard mirrorInsulating housingLoad separatorLow voltage circuit breakerMain switchMolded case circuit breakerMotor drivePadlock lockPlant protectionPower switchPush-through membraneReversing switchService deskStep switchSwitch disconnector protectionSwitch headTransfer switchfrom the following manufacturers:Manufacturer overview catalogue Load break switches:ABBCeagDoepkeEatonElektraHagerHenselKraus & NaimerSchneider ElectricSiemensSontheimerStahlSteidele-Stromvert.Wöhner
Installation relay - What is a relay and how does it work? What types of relays are there? Where are relays used? And which relay suits your project best? Here you can learn more about switching and controlling electrical circuits. Installation relays are used in many different applications. You will find relays in domestic electrical installations, in electrical appliances, in commerce and industry, and in vehicles.A look into historyThe first relay was invented by the American J. Henry in 1831 and was based on the electromagnetic principle of operation. Henry used the relay in his university lab as a 'gimmick' to entertain his students. However, it was not yet possible to switch gears. The first switching relay was invented by Samuel Morse in 1837. Morse refined Henry's device and adapted it to transmit signals (the Morse code) down miles of wire. This was also the basis for the telegraph.Did you know that the world's first computer was also built with only relays? It was a development by Konrad Zuse, which was presented in 1941. A lot has happened since then and relays are no longer used in modern computers. Nevertheless, the relay is still an important and popular component in electrical installations today. Think, for example, of switching on and off the lighting in the stairwell. The circuit works regardless of which floor you are on. However, there are numerous other areas of application. That is why different installation relays are also available in the eibabo® shop. Simply browse through our virtual catalogue. You will surely find some high-quality and inexpensive installation relays that arouse your interest.Image: Eltako ER12-110-UC switching relayWhat are relays?Relays are components within electrical installations of all kinds. They are mainly used as circuit breakers and control switches in electrical devices or are used as important components in many control processes. There are numerous types of relays, which differ in detail. The manufacturers develop the devices for special tasks and adjust the triggering characteristics accordingly. Relays that are often bought in this catalog are coupling relays, power relays, switching relays, interface relays, semiconductor relays and many more. The basic operating principle of a relay is to open and close circuits or contacts by reacting to electrical quantities such as current or voltage.How are relays differentiated?Relays are classified according to various criteria. These include:the type of physical inputs to which the relay respondsthe area of application that the relay assumes in control systemsthe structure of the device design and the principle of operationthe switching capacitythe shape and sizeand some others A relay consists of three main elements:entering / entering a valuethe intermediateof execution / actuation by actuator If we look at the type of physical input variable, we distinguish between electrical, thermal, optical, mechanical, magnetic or acoustic relays. NoticeNot all relays work with fixed physical quantities. Differential relays, for example, react to the difference in values. Polarized relays respond to a change in sign of a specific value. The acquisition of the measurand is the primary element of the relay. This converts the input value into another physical quantity. The receiving element can have different designs depending on the purpose of the relay and the nature of the physical quantity. In the case of a latching relay or a voltage relay, the receiving element consists of an electromagnet. In the case of a pressure relay, this can be a membrane or bellows. The sensing element of a level relay is usually a float and so on.The intermediate element compares the input value with the specified limit value of the device and, if it is exceeded, transmits an impulse to the executing actuator.The actuator transmits the pulse from the relay to the working circuits. Each relay basically contains a control circuit and one or more operating circuits. Depending on the type of actuator, the relays are divided into contact relays and contactless relays. Contact relays act on the outgoing circuit with the help of electrical contacts. Their closed or open state allows either full closure or full mechanical break of the work circuit. Contactless relays act on the working circuit by a sudden change in parameters in the control circuit. This is achieved via resistance, capacitance, inductance or a change in voltage level or current level.How does an installation relay work?Depending on the requirement and application, relays are simple or complex. However, the basic functional principle does not differ significantly. In the center is the coil with an iron core. When current flows through the coil, an electric magnetic field builds up. A movable, ferromagnetic armature reacts to this magnetic field and is attracted. This change in position connects two contact springs with each other and the so-called working contacts in the relay close. In this case, the relay acts as a closer. In some designs, so-called break contacts are opened when the magnetic field is created. These are called openers. Combinations of openers and closers are also possible. These are changeover contacts or changeover contacts.Already knew?If the coil of a relay is suddenly de-energized, high voltage peaks can occur. Therefore, depending on the model, resistors or diodes are used to prevent these voltage peaks from flowing back into the control circuit. Sensitive components remain protected.As soon as the coil no longer generates a magnetic field, the armature is returned to its original position by spring force. The make contacts are no longer closed and the break contacts are no longer open.What are Solid State Relays?More and more relay functions are currently being taken over by semiconductor circuits, so-called solid-state relays (SSR). A solid state relay is an electronic device that turns on and off a high power circuit with low voltages. There are no mechanically moving elements in this type of relay. The device consists of:a sensor that responds to an input signala solid-state electronics with high-performance circuitry Solid state relays can be used with both direct current and alternating current. With the help of thyristors and transistors it is possible to switch currents of several hundred amperes. Compared to electromechanical relays, semiconductor relays have a significantly higher switching speed. Solid-state relays are less suitable for switching under short-term overload conditions. Compared to electromechanical relays, solid state relays offer the following advantages:smaller dimensionshigh switching speedsnoiselesspowerfulmore energy efficientspark-free circuitmaintenance freelong lifetimelow sensitivity to adverse conditions What should I look out for when buying an installation relay?In the eibabo® shop there is a huge selection of different relays with numerous specifications. Choosing the right installation relay can be difficult. Before you buy, you should determine the function of your circuit and then define the task of the relay. Then select a suitable relay for your project. Decision criteria include:What kind is the physical input quantity?Will the device be subjected to vibration and shock?Where will the installation take place?Are dust, moisture or temperature fluctuations to be expected?What is the switching voltage and the switching current?Which current magnitudes and voltage magnitudes occur?What is the expected switching frequency?What requirements do I place on the durability of the relay?Are special functions or additional programming required?  Notice:When switching active and inductive loads, opening the circuit for the contacts is the most difficult. In this case, arcing occurs, which puts a lot of strain on the contacts. The switching relays offered by eibabo® are high quality, inexpensive, versatile, reliable and universally applicable. The best-known manufacturers in our range are ABB, Doepke, Dold, Eaton, Eberle, Eltako, Finder, Hager, Jung, Schalk, Schneider Electric, Siemens and WAGO.  Catalogue content:In this eibabo® catalogue Devices for distribution board- / surface mounting > Installation relay you will find items from the following product groups:Item overview:AC contactorAC voltage relayBoiler relayBuilt-in distributor deviceCan relayCoupling relayDC contactorExpansion moduleInstallation relayInstallation switching relayMemory relayModular installation devicePower relayPreset relayRelay interfaceRelay stationSwitching relayUniversal voltage relayfrom the following manufacturers:Manufacturer overview catalogue Installation relay:ABBDoepkeDoldEatonEberleEltakoFinderHagerJungSchalkSchneider ElectricSiemensWAGO
Time relays - What are time relays used for? Sometimes it may be that your structural conditions make it necessary to delay electrical switching processes. Perhaps you still have to walk through a dark garage after activating the light switch, or a motion detector should only be activated after you have left a room. In these and many other scenarios, the use of a time relay can be useful. This ensures that a certain function is only activated or deactivated after a certain period of time. You can set the length of this period of time on the relay.What is a time relay?Timing relays or delay relays are simple control relays that control defined events based on time sequences. The difference between a classic relay and a timer relay is when their output contacts open and close. In a control relay, this occurs when voltage is applied and removed from the coil. With the time relay, the contacts can open or close before or after a certain delay. The installation usually takes place in the control cabinet on the DIN rail. TIPThe set time intervals can be set between milliseconds and hours depending on the relay. Typically, the delay is initiated or triggered by one of two methods:applying or switching off a control voltagethe occurrence of an impulse / trigger signal What functions do time relays perform?It is often difficult for the layperson to understand technical descriptions. When describing the functions of timing relays, we encounter terms such as control voltage, response delay, release delay, pulse shaping or make contact. In order to give you an understanding of how the time relays work, we describe the switching options below using simple examples.To make our examples easier to understand: Always assume that you only switch a 'control voltage' on or off using a switch or button in order to set a switching process (scenario) in motion. However, the actual circuit goes via the relay. Pressing a switch or button when using a switching relay does not necessarily lead to an immediately visible action. You only tell the relay that the preset scenario should now run and that it has to carry out the corresponding switching at the desired time. The following ten scenarios are most commonly implemented with time relays:Scenario 1 - The fallback delayThe release delay is also called switch-off delay.Example: When the control voltage is switched on using the switch (ON), the relay closes the circuit and the light lights up. If you press the switch again (OFF), the light stays on and the set delay time starts to run on the timer relay. The relay keeps the current flowing. At the end of the time period, the relay breaks the circuit, turns off the light and goes into sleep mode. When the light is switched on again using the switch (ON), the process starts again.Scenario 2 - The response delayThe response delay is also called switch-on delay.Example: When the light is switched on using a switch (ON), the time set on the relay starts to run immediately. Only after the time has elapsed does this close the circuit and the light lights up. Now when you press the switch again (OFF), the relay will directly break the circuit, turn off the light and go into sleep mode. When the light is switched on again using the switch (ON), this process starts again. Depending on the model, after the response delay has been interrupted, the time that has already elapsed remains stored or is deleted.Scenario 3 - The impulse controlled response delayThe switch-on delay is not triggered by a permanently applied control voltage, but by a pulse (briefly applied control voltage). These are also referred to as trigger signals.Example: In contrast to scenario 2, a short impulse in the control voltage is sufficient to set the scenario in motion. You don't turn on a switch, but press a button, for example. A preset time starts to run at the relay and then it closes the circuit for a previously defined period of time. Then it goes back to sleep mode. You can usually set both time periods individually. A classic application is a door opener. To do this, briefly press a button. After the set time (this can only be milliseconds), the relay interrupts the circuit on the electromagnet of the door lock for e.g. 3 seconds. During this time, the door is open and visitors can enter. After these 3 seconds have elapsed, the relay automatically restores the power supply to the electromagnet and the door is locked again.Scenario 4 - response delay and release delayThe circuits from scenarios 1 and 2 are combined with each other.Example: When the light is switched on using a switch (ON), a set time immediately begins to run on the relay. Only after this period of time has elapsed does this close the circuit and the light begins to shine. If the switch is then actuated again (OFF) and the control voltage is thus interrupted, a set delay time begins to run. The relay keeps the current flowing. Only after the time has elapsed does the relay interrupt the circuit, switch off the light and go into idle mode. Depending on the model, after the response delay has been interrupted, the time that has already elapsed remains stored or is deleted. Depending on the relay, the response delay and release delay are either of the same length or can be set independently of one another.Scenario 5 - The relay as a clock (starting with a pulse)You know this from the turn signal in the car. It is a flasher relay.Example: You press the switch (ON) and the relay closes the circuit immediately. The light glows. After a defined period of time, the relay interrupts the circuit and the light goes out. After another defined period of time, the relay closes the circuit again and the light shines again. This interval continues as long as the control voltage is present. Press the switch (OFF), interrupt the control voltage. The interval switching ends at the relay and it goes into the idle state.Image: Finder 83.02.0.240.0000 time relayScenario 6 - The relay as a clock (starting with a pause)This scenario is similar to scenario 5, it just starts with a pause, not an impulse.Example: You press the switch (ON) and the preset pause time starts to run on the relay. Only then does the relay close the circuit. The light glows. After a defined period of time, the relay interrupts the circuit and the light goes out. The break time begins again. Then the relay closes the circuit again and so on. This interval continues as long as the control voltage is present. Press the switch (OFF), interrupt the control voltage. At the relay, the interval switching ends immediately and it goes into idle mode.Scenario 7 - The fleeting switch-on relayExample: When the control voltage is switched on using a switch (ON), the relay closes the circuit and the light lights up for a previously defined period of time (wiping time). The relay then automatically interrupts the circuit again. It goes into sleep mode even if control power is still present (switch still ON). This scenario can only be repeated if the switch has been actuated (OFF) after the wiping time has elapsed. If the switch is confirmed (OFF) during the wiping time, the control voltage is interrupted and the relay also interrupts the circuit immediately. The rest of the wipe time is deleted. The process can start over.Scenario 8 - The fleeting switch-off relayExample: When switching off the control voltage using a switch (OFF), the relay closes the circuit and the light lights up for a previously defined period of time (wiping time). The relay then automatically interrupts the circuit again and goes into the idle state. This scenario can only be repeated if the switch has been actuated (ON) after the wiping time has elapsed. If the switch is confirmed (ON) during the wiping time, control voltage is applied again and the relay interrupts the circuit immediately. The rest of the wipe time is deleted. The process can start over. A classic use case: you leave a building in the dark and switch off the main light. The orientation lights turn on and you have time to leave the building. After that, the orientation light also switches off automatically.Scenario 9 - The fleeting on and fleeting off relayThe circuits from scenarios 7 and 8 are combined with each other.Example: When the control voltage is switched on using a switch (ON), the relay closes the circuit and the light lights up for a previously defined period of time (wiping time). The relay then automatically interrupts the circuit again. It goes into sleep mode even though control power is still present (switch still ON). When the control voltage is switched off using the switch (OFF), the relay closes the circuit again and the light lights up again for the specified wiping time. When this expires, the relay breaks the circuit, turns off the light and goes into sleep mode.Scenario 10 - The time relay as a pulse shaperThe application of the control voltage (regardless of whether it is long or short) is converted into a switching process of the same length.Example: You press a switch (ON) to start the scenario. The relay closes the circuit for a previously defined period of time. The light glows. After the time has elapsed, the relay opens the circuit again and goes into the idle state. The light goes out. It is irrelevant whether you press the switch again while the light is on (OFF) or whether you do this much later, when the light has already gone out. The process only starts again when control voltage is applied again (switch ON).This is how you saveMany of the scenarios described can be implemented with multifunction time relays. So you are always flexible and only have to invest in one device.In addition, it is also possible to combine several time relays with one another in order to create corresponding dependencies. Please refer to the product descriptions to find out whether additional functions such as a two-stage response delay or switch-off pre-warning can be implemented with a relay.Here in the eibabo® technology store you will find many inexpensive products for the field of control technology and automation technology. If you are interested in the implementation of these or similar circuits, you can get all the relays, switches, buttons and cables you need from us. Buy high-quality time relays from well-known brands such as ABB, Doepke, Dold, Eaton, Eltako, Omron, Metz, Schalk, Siemens and Ziehl. Use one of our many payment methods and benefit from fast, worldwide shipping.  Catalogue content:In this eibabo® catalogue Relays > Timer relay you will find items from the following product groups:Item overview:Cover hoodDIN rail time switchFront installationImpetusItemized listMechanicallyMultifunction moduleON-delay relayPanel mountPlug-in relayPulse shapingRelay moduleRelay modulesResponse delayRetarderStaircaseStaircase lightingSwitch-off delayTerminal coverTime blockTimerTimer relayTimer switchUniversal relayUniversal voltageWipe-offWipe-onWiping relayfrom the following manufacturers:Manufacturer overview catalogue Time relays:ABBDoepkeDoldEatonEberleFinderGöringLegrand BticinoLimotMaicoMetzMurrelektronikOmronPhoenixPilzRockwellSchalkSchneider ElectricSiemensTeleThebenWAGOWeidmüllerWieland
Combi earth leakage circuit breaker - How do you protect yourself from fires in electrical installations? Which devices prevent fires? How do you find the right fire protection switch and what specification should you pay attention to? This eibabo® catalog contains combination RCCBs/line protection with a focus on fire protection. Did you know that about a third of the fires in Germany inside buildings have an electrical origin? Three quarters of this can be traced back to electrical devices or the electrical installation. How can you face this danger? Electricity is omnipresent and it is impossible to imagine our everyday lives without it. As a rule, the classic measures for protection against overload, short circuits and residual currents are considered sufficient and comprehensive fire protection is therefore also assumed. But this protection is not unlimited. In this article, we will bring you closer to the function of suitable fire protection switches and arc fault circuit breakers.Image: ABB DS ARC1 C20 A30 fire protection switchWhat is a combination RCD/line protection with fire protection function?If switches for fault currents and line protection are combined, this results in FI/LS combination switches. These protective switching devices combine the functionalities of residual current circuit breakers and miniature circuit breakers. What are these properties? A residual current circuit breaker prevents you from getting a dangerous electric shock if you touch something that is live. This switch provides personal protection that ordinary fuses and a circuit breaker cannot provide. A circuit breaker is an electromechanical device used to protect a circuit from excess current caused by either an overload or short circuit. So while a residual current circuit breaker only protects people from electric shocks caused by ground faults and a miniature circuit breaker is only used to protect against overcurrent, the combination of both switches offers comprehensive protection against both types of faults.Good to knowAn arc fault switch is an arc flash detection device. Its purpose is to detect the presence of dangerous electrical arcs and to isolate the affected circuit.Added to this protection is another safety feature - arc flash detection. Devices with this capability are referred to as fire circuit breakers, arc fault circuit breakers, or AFDD. The abbreviation AFDD stands for the English term 'Arc Fault Detection Device'.Why do I need a fire protection switch?Fusing with an RCBO combination switch already protects against many dangers. But there is a kind of error that the classic RCBO combination switch does not recognize. These are arcs within a cable or connection. But what is an arc? An electrical arc occurs when electrical current crosses a physical separation between two conductive materials. If only little current flows, a short-term spark is produced. If the current is high enough, a continuous arc is generated. This can result in temperatures of over 6000°C and gaseous air turns into plasma. In principle, arcs are not a problem as long as they are generated in a controlled manner, for example in an electric motor or in a light switch. However, when accidental arcing occurs in a circuit, a fire can occur due to the intense heat from combustible materials. Common causes are:Damaged insulation of current-carrying conductorsFaulty cable connections and line connections These causes are often caused by improper handling. These include:kinking, crushing and twisting of cables and linesdamage caused by screws, nails or drillsloose connections between two cable endsPoor cable protection and mounting (damage from mechanical stress, movement or rodents) To minimize the risk of fire from these faults, fire protection switches have arc fault protection devices and offer protection against serial and parallel arc faults. A serial arcing fault occurs between two parts of the same phase of a line. A parallel arcing fault occurs when the arc occurs between the phase conductor and either the neutral conductor or the earth conductor.How does the arc fault protection device work on a fire protection switch?Fire protection switches continuously monitor the waveform of the electrical current flowing through one or more circuits. Arcs affect this current flow. If the device detects an unusual signature in the wave, the circuit is broken. 'Normal' arcs that occur during the operation of electrical systems (e.g. in the electric motor) are recognized by the device as harmless. With these, the protective mechanism does not trigger. But beware! A fire protection switch does not recognize:Phase-to-earth fault such as a residual current circuit breakerLine-to-neutral fault like a circuit breakerOverload like a circuit breaker For this reason, the fire protection switches are usually available in combination with RCBOs or are combined with them in the control cabinet.When should I buy a combination RCD/line protection with fire protection function?Basically, we always recommend not to save on your own safety. Even if a fire protection switch is not necessary to protect all circuits, the damage in the event of a fire is usually higher than the additional costs for such a device. Of course, you have to weigh the risk yourself. In certain facilities and parts of the building, however, the use of a fire protection switch always makes sense. This can be:Institutions with valuable goods (jewelers or museums)Rooms with combustible contents (barns, laboratories)oxidizing structures (chimneys, elevator shafts)Buildings open to the public (hotels, retirement homes, youth hostels, hospitals) If you decide against the installation of fire protection switches, please pay attention to the smell of burning from cables or sockets in everyday life. It doesn't have to be an arc fault, but if you smell burnt, you should always look for the cause. Also, if any cord or appliance feels hot to the touch, turn off the affected circuit immediately and, for permanent installations, contact an electrician.for your safetyFire alarms and smoke alarms are additional safety devices that you should never do without in your building. You will find high-quality and reliable devices in our shop. Use our intelligent search.Beware of rapid 'clicking' noises and burn marks on electronic devices. Turn off the affected circuit and have an electrician check the system.What types of fire protection switches are there?As a global electronics retailer, the eibabo® technology store has an extensive range of fire protection switches. Available are:stand-alone devices that you can install in series with a suitable protective device (miniature circuit breaker or residual current circuit breaker).Device combinations that unite the fire protection switch with a combination RCD/line protectionAdditional modules for other protection devices, which are usually only compatible with the protection devices of the respective manufacturer What should I look out for when buying a combination RCD/line protection with fire protection function?The choice of the right switch depends on the tripping characteristics, as is the case with classic RCBOs. There are, among other things, type B and type C combination switches. The main difference lies in the tolerance to the strength of the current surge, which leads to the disconnection of a circuit. TIP:Higher inrush currents can occur when lighting or motors are switched on. Your selected device must be able to distinguish these load peaks from actual errors. Devices with B characteristics are typically used for normal household and non-critical commercial applications. These trigger at residual currents that correspond to three to five times the nominal current. Choose type C devices for commercial and industrial applications. These trip at five to ten times the nominal current.Make sure you choose a reputable manufacturer. With no-name devices, reliable operation cannot be guaranteed and they deviate significantly from the specified values. In our shop you only get the best quality from leading manufacturers such as ABB, Doepke, Eaton and Hager.  Catalogue content:In this eibabo® catalogue Circuit breakers and fuses > Earth leakage circuit breaker with auxiliary device you will find items from the following product groups:Item overview:AFD switchAFDDArc faultArc fault protectionArc fault protection deviceFire protection switchFire protection switching deviceFire switchModular installation devicePersonal protection machinefrom the following manufacturers:Manufacturer overview catalogue Combi earth leakage circuit breaker:ABBDoepkeEatonHager
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