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Elektra - It is more than 100 years since the company was founded in Tailfingen by Richard Maute, Karl Schneider and Gotthilf Ammann as an electrotechnical company for building installations. A year later, DC starters and lever switches were manufactured, laying the foundation for the switchgear specialist Elektra Tailfingen. In the same year, the first patent application for a sewing machine controller was filed and series production began. Today the company supplies customers all over the world with individual solutions and standard products such as switches, industrial plugs and sockets, distributors as well as testing and measuring devices. It attaches particular importance to customer proximity, flexibility and solution-oriented approaches in the development of new products. This is made possible by an extensive core range, which is based on a well thought-out modular system. This saves resources, ensures short reaction times and enables all requirements to be implemented quickly. Of course, Elektra Tailfingen is certified according to DIN EN ISO 9001. All products are developed, built and tested according to national and international regulations. From the company's product range, we offer, for example, main and emergency stop switches in numerous designs, star-delta switches, reversing switches, motor protection switches, Cekon sockets, Cekon plugs and Cekon couplings, pole-changing switches, foot switches, line testers and site power distributors from the eibabo® technology store . We are particularly impressed by the high quality and the solid and durable design of the components. In the eibabo® shops from eibmarkt® you will find not only products from Elektra but also everything else you need for your electrical installation - be it for private purposes or for commercial and industrial use.

Found in shop categories: 7

Contactor combination - You are here in the eibabo catalog for the various contactor combinations. You probably already know that there are different contactor circuits that are required for different applications. Here you will find contactors and contactor combinations for the production of simple contactor circuits, for contactor circuits with latching, for circuits with mutually interlocking contactors, for reversing contactor circuits, for star-delta contactor circuits or for contactor circuits that represent a combination of the above. Simply select the right components for you and your application from our catalogue. With our high-performance logistics, we can meet very short delivery times. In addition, your purchase is always secured with Trusted Shops buyer protection. And if you have not ordered the right component, that is not a problem. Our accommodating complaint handling will find a solution together with you.Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Combination of contactors you will find items from the following product groups:Item overview:Automatic reversing switchAutomatic star delta starterAutomatic star-delta starterCombination of contactorsConsumer feederContactorContactor combinationDelta contactorInstigatorLeft-right contactorLine contactorMotor starterMotor starter combinationReversing combinationReversing contactorReversing safetyReversing starterReversing switchStar deltaStar-deltaStar-delta combinationStar-delta contactorStar-delta contactor combinationStar-delta instigatorStar-delta motor starterStar-delta starterStar-delta switchStarter combinationfrom the following manufacturers:Manufacturer overview catalogue Contactor combination:ABBCondorEatonRockwellSchneider ElectricSiemensStiebel Eltron
Insulation monitoring device - How does an insulation monitoring device work and where do I have to use it? What does the device protect against and what advantages does it offer me? Read here why the correct insulation of an electrical system is an essential prerequisite for its safe operation. Protect yourself and your system with high-quality measuring devices and reliable testing technology from the eibabo® online shop.The History of Insulation Monitoring DevicesThe first insulation monitoring device was invented by Walther Hans Bender in Frankfurt/Oder in 1939 and a patent was applied for. It was a device for three-phase systems in brown coal mining. In 1952 the 'Isometer' was protected as a trademark and has belonged to Bender GmbH & Co. KG ever since.Image: Dold IL5880.12 insulation monitorHow does an insulation monitoring device work?An insulation monitoring device is also referred to as a ground fault monitoring device. Connect this between your active power lines and the earth line. With continuous insulation monitoring, you can discover weak points in the insulation of your electrical systems. These can be caused, among other things, by moisture or by age-related fatigue of the material. You want to detect a problem like this before voltage breakdown occurs. Voltage breakdown will damage the insulator and cause sparks or arcing, which can lead to power failures, fires, property damage, and personal injury.The device sends a measuring voltage to your system and monitors it. If there is a ground fault, the measuring circuit between the mains line and the ground is closed. A measuring current proportional to the earth fault thus occurs. A voltage drop occurs at the measuring resistor of the device. Conversely, this means that the insulation resistance of the system is reduced. The insulation monitor registers the change and evaluates it. It is not only the resistance itself that is important, but also its course over time. In the case of undamaged insulation, the insulation resistance asymptotically approaches a certain reference value. term asymptoteA value behaves asymptotically if, over time, it approaches a reference value without ever reaching it. If the insulation resistance falls below the reference value, this is an indication of the increase in the conductivity of the insulator. From this it can be concluded that the insulator has changed chemically due to external influences or that its material is gradually enriched with decomposition substances. If a critical point is reached, the device sends a message. This allows you to recognize the deterioration of the technical condition of the insulation at an early stage and to take the appropriate steps for repair or maintenance in good time.Where is the use of an insulation monitoring device required?The measurement of the insulation resistance is used in local low-voltage networks without an operationally grounded star point (so-called IT power supplies).For explanationBasically, low-voltage systems are divided into TN systems, TT systems and IT systems. The main difference lies in the way of grounding. While residual current is used for monitoring in TN systems, insulation monitoring devices are used in IT systems.Modern insulation monitoring devices have a history memory and record the insulation resistance measurements. The data can be called up later and serve as suitable monitoring evidence during controls.What are the advantages of insulation monitoring devices?With insulation monitoring devices, you continuously monitor safety-relevant circuits for residual currents and residual currents. This results in a number of advantages in daily use:Measurement without switching off ongoing operationsReducing the risk of failure and increasing the availability of monitored electrical systemsReduction of electromagnetic interferenceReducing the risk of fireSaving of time-consuming and expensive maintenance and repairs You also prevent the safety of people and machines and thus avoid accidents, property damage and personal injury.Which manufacturers offer high-quality and reliable insulation monitoring devices?In the eibabo® technology store you only get quality goods from well-known manufacturers. These include ABB, Bender, Dold, Eaton, Pilz, Schneider Electric and Siemens. As a leading specialist center for electrical installations, lighting and smart home, we offer a huge selection as well as:top conditionsmany secure payment methodsshort delivery timeworldwide shippingshipment trackingaccommodating complaints handling   Catalogue content:In this eibabo® catalogue Relays > Insulation and earth fault monitoring relay you will find items from the following product groups:Item overview:Insulation monitoring deviceIso guardIsolation guardMeasuring relayMonitoring relayfrom the following manufacturers:Manufacturer overview catalogue Insulation monitoring device:ABBBenderDoldEatonPilzSiemens
Load switch - What are load switches and what are the switches used for? What switching properties do the different load switches have and how can you use them for your system? There are many different types of load switches on the market. And safety is the top priority when switching electrical devices. It is therefore important to choose a load switch that is suitable for your application. The following article should help you to make the right purchase decision.What are switching devices?Switching processes are omnipresent in electrical engineering. However, it is often not clear to laypersons which switch is the right one for the respective application. We give a brief overview of the various switching devices and take a closer look at the load switch. TIP:Working on electrical systems is dangerous for laypersons. Leave installations, repairs and maintenance to an experienced electrician. Switching devices are electrical devices that are used to control, switch or regulate electrical currents and voltages. These include, for example, switches, relays, current transformers, rectifiers and transformers. Their task is currentless switching, switching operating currents and/or switching short-circuit currents. The devices are differentiated according to their rated data, the switching task and the switching frequency. Commonly used switches are, for example:circuit breakerCircuit breakers are used for currentless switching on and off. Their task is to switch off downstream equipment in order to be able to work on it safely.load switchLoad switches switch currents up to their rated operational current. These switches are also used to switch on currents on an existing short-circuit up to the rated short-circuit inrush current.switch disconnectorLoad-break switches are a combination of load switch and disconnector. These are load switches with a safe isolating distance.circuit breakerIn the event of faults within the scope of the rated values, circuit breakers can switch on and hold high overload currents and switch off without damage.contactorA contactor is similar to a relay and is designed as a switch for high power with a high switching frequency. This is a device with a limited short-circuit making capacity and short-circuit breaking capacity.For safety:Isolating equipment serves to ensure safety when working on electrical systems. There must be an all-round separation from non-earthed lines. The fact that there is no voltage is no guarantee for activation.When selecting a switching device, please note not only its switching characteristics, but also the key figures with regard to:rated voltageRated operational currentrated surge currentRated short-circuit making currentRated short-circuit breaking currentRated breaking currentRated Insulation LevelType of arc quenching Load switches, load-break switches and the circuit breakers that are also often used are among the classic basic items in the eibabo® online shop. Convince yourself of our fair prices and look forward to fast delivery.What is a load switch?A load switch is a switching device for low and medium voltage ranges. This safely switches operating currents and short-circuit currents on and off under normal operating conditions. In contrast to a circuit breaker, this is usually not provided with secondary protective devices. In other words: A load switch is a switch for switching loads without a safe isolating distance. A classic example of this is the normal switch to turn the light on and off.What types of load switches are there?In the eibabo® shop you can get a large number of different load switches. These include reversing switches, star-delta switches, emergency stop switches, changeover switches, Dahlander switches, step switches and undervoltage releases. Depending on the design, the load switches can be surface-mounted, used in switch consoles or mounted as a series installation device on the DIN rail.What do I need a reversing switch for?The reversing switch is also known as a cam switch and usually has a zero position as well as a position 1 and position 2. No contact is closed in the zero position. The contacts of positions 1 and 2 are switched in such a way that a three-phase motor runs either clockwise or counterclockwise. The direction is switched over via the zero position.What is a star-delta switch?In three-phase systems, star connection and delta connection are most commonly used. Three-phase current, or three-phase alternating current, is generated in three coils, each offset by 120°, in a homogeneous magnetic field. With the star connection, one coil connection from each of the three coils is connected to a common star point. This star point serves as a connection for the neutral conductor. The other connections of the three coils form the three outer conductors. In a delta connection, the two terminals of one coil are each connected to one terminal of the other two coils. There are three connection points for connecting the three outer conductors. There is no neutral wire. The star-delta switch combines these circuits or allows switching between the circuits. This is necessary, for example, when starting a three-phase motor. In the star connection, the motor only requires about a third of the starting current. When the engine has started, it switches to delta connection. The motor draws more current in the delta connection and therefore has a higher output.You can also get combined reversing star-delta switches in the eibabo® shop.Picture: Eaton T0-4-8410/I1 star delta switchWhat do I use a Dahlander switch for?The Dahlander switch is used in so-called asynchronous machines (motors with switchable poles). The switch alternates between a delta connection and a double star connection. This changes the number of poles in a ratio of 1:2. This results in a change in engine speed of approximately 2:1. The classic application is, for example, lathes, which have a fast and a slow run.What are step switches?Electrical switches with several switching positions are called tap changers. Usually tap changers are constructed as rotary switches. The individual stages are used, for example, to change the voltage step by step or to switch the signal.What do I use undervoltage releases for?Undervoltage releases are electromagnetic or electronic components that trigger a switch-off process when the control voltage drops or fails. On the one hand, this protects sensitive devices, assemblies and drives from operation outside the required nominal voltage. On the other hand, it prevents, for example, rotating machines from starting to move uncontrollably when the voltage returns.  Catalogue content:In this eibabo® catalogue Low-voltage industrial components > Off-load switch you will find items from the following product groups:Item overview:Cast pastedCentral built-in switchControl switchDahlander circuitDahlander switchFuse switch disconnectorHeater switchLoad current switchLoad switchLockingMachine switchMain switchMaintenance switchMini cam switchOff switchPotentiometerRepair switchReversing buttonReversing switchSeries switchSolar switchStar-delta switchSurface-mounted housingSwitch disconnectorSwitch position indicatorSwitching deviceToggle switchTransfer switchfrom the following manufacturers:Manufacturer overview catalogue Load switch:EatonElektraHagerHeliosKraus & NaimerMaicoMennekesRockwellSchneider ElectricStahlSälzer

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