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Control unit light control system - What are control units for light control systems? Behind what sounds quite complicated and abstract, in classic usage, there are primarily potentiometers, also known as dimmers. In this catalog you will mainly find a wide variety of flush-mounted dimming inserts, with which you can usually control the brightness of connected lamps by turning them and switching them on and off using a pressure switch. Dimmers are often used in the private sector in order to create a particularly cozy living atmosphere in certain living rooms. In addition to potentiometers for flush-mounting, you can also get classic buttons, switches and other end devices in the eibabo online shop to be able to set the light in your rooms in terms of time or intensity. With our controllers for light control systems, you can create an atmospheric ambience in your home.Catalogue content:In this eibabo® catalogue Domestic switching devices > Automatic controller for light controlling system you will find items from the following product groups:Item overview:Accessories for light control systemAntenna socketAutomatic controller for light controlling systemControl componentControl components for light control systemControl potControl unitControllersDALI rotary potentiometerDimmer controllerElectronic control potentiometerElectronic rotary potentiometer 1-10 VElectronic touch rotary potentiometerEnergy efficientHand controllerLight colorLight controlLight control system control unitLight control system potentiometerLight emitting diodePotPotentiometerPotentiometer for light control systemPotentiometer insertRotary dimmerRotary potentiometerTactile control unitTouch dimmerfrom the following manufacturers:Manufacturer overview catalogue Control unit light control system:BEGA GantenbrinkBerkerBusch JaegerElsoGiraHagerIDVJungMertenOpple LightingRidi-LeuchtenSchalkSteinel
Air conditioner switch cabinet - Is it very warm in your control cabinet? Are you concerned that the high temperatures could damage your technology? Read here what options you have for cooling your control cabinet and which criteria you use to select an air conditioning unit for the control cabinet.If many devices are installed in a control cabinet, they usually also generate heat. This leads to increased temperatures, which could damage the components. In the private sphere, this does not happen very often. Within commercial and industrial control cabinets, however, the number of devices is usually significantly higher and air conditioning is necessary. Control cabinet air conditioning systems are therefore mainly used for cooling communication devices, transformers and switchboards.Image: Rittal SK 3361.500 wall-mounted cooling unitUnder what circumstances are air conditioning units used for the control cabinet?When the air temperature outside the cabinet is too high or the air quality is poor, simply using ventilation to dissipate the heat may no longer be sufficient. Control cabinet air conditioning systems are designed in such a way that they dissipate excess heat from control cabinets and device housings to the atmosphere. This serves to protect the heat-sensitive components from overheating, because the service life of electronic components is reduced at higher operating temperatures. The air conditioning of control cabinets extends the service life of electrical components and ensures increased fault tolerance of the devices. Use a control cabinet air conditioning system if:the temperature inside the housing must be equal to or lower than the ambient temperaturethe required heat dissipation cannot be provided by the environmentthe ambient air is very pollutedthe ambient air contains too much humidity The typical areas of application are server farms, telecommunications systems, automation systems and control cabinets, transformer stations and substations, radio stations, data storage stations and energy storage systems.How does a control cabinet air conditioning system work?The design of industrial air conditioning systems provides for two completely separate air circuits, which prevent the air in the cabinet from mixing with the ambient air. This means that the cooling system maintains a suitable temperature inside the case without the ingress of dirt, dust, moisture, water or corrosive fumes. TIP:Make sure that the housing or the control cabinet is also sealed airtight. If necessary, add the necessary seals to the door or close ventilation outlets. Most of the air conditioning units for control cabinets available from eibabo® work according to the principle of the air-air heat exchanger. These typically use copper tubing with small fins to ensure optimal heat exchange between the two air circuits. The copper tubes are filled with coolant, which easily changes its state of aggregation between liquid and gaseous. In order to cool the switch cabinet, the warm air from the switch cabinet is routed through the ribs of the pipe system. The copper tubes and fins absorb the heat, heating the liquid in the copper tubes while cooling the air. A heat exchange takes place. The heated liquid in the copper tubes turns into a gas and moves to the other side of the unit to the external air circuit. This causes the cooling of the copper pipes and the coolant according to the opposite principle. The heat absorbed in this way is released into the atmosphere. The coolant becomes liquid again and flows back to again absorb heat in the control cabinet. A cycle is created. Unlike other cabinet cooling systems, air-to-air heat exchangers have no moving parts. There are low maintenance costs, the devices work efficiently and economically.Far less common are the thermoelectric cabinet coolers. These work according to the Peltier effect and are therefore also called Peltier coolers. These represent special types of cooling systems, which are used particularly in harsh and dangerous environments.Jean PeltierIn 1834, the French physicist discovered that the flow of current at the junctions between two dissimilar electrical conductors causes a temperature difference.The functional principle of thermoelectric cabinet coolers is based on the fact that heat is either absorbed or given off when a voltage is applied to the connection point between two materials. Semiconductors are typically used here, the different number of free electrons of which ensure the required energy difference. When current flows, heat is transferred from one terminal to the other and a cooling effect occurs.What does master/slave function mean?An appropriate temperature in the control cabinet ensures the function of the devices installed in it. It is therefore often necessary to avoid an increase in temperature even if a device fails or the performance of a device is no longer sufficient. Although the performance of one device is typically sufficient, a second air conditioning device serves to secure the first system and is connected to it. Both devices exchange data, measured values and error messages. Master and slave work to support each other, alternately or as a substitute. The master device thus takes care of the primary cooling, while the slave remains in stand-by mode and switches on automatically when required.How and where can the air conditioning for control cabinets be installed?Systems are offered for a wide variety of purposes. You get devices for outdoor use, devices protected against vandalism and devices for indoor installation. It is mounted on the roof or on the side walls of the cabinet. With roof-mounted air conditioners, the heated air escapes to the rear, left, right or even upwards. This means that it can be used in a row or set up close to the wall without any problems. In the case of air conditioners for wall mounting, installation, partial installation and attachment are possible, depending on the space required.What should I look out for when buying a switch cabinet air conditioning unit?If the ambient temperature is higher than the required temperature in the cabinet, you should consider using a cabinet air conditioner. The following points, among others, should be considered when making the selection:Type of installation of the control cabinet according to VDE 0660 Part 500Ambient conditions (temperature, dirt and humidity)maximum desired control cabinet interior temperaturePower loss of the electronic components in the control cabinetIP degrees of protection If you install an air conditioner for the control cabinet, please pay attention to the following things:The control cabinet must be sealed.When mounting on the cabinet roof, this should be reinforced if necessary.The condensate drain must be introduced into the outlet opening so that no condensate flows into the cabinet. Some models do not have a drain. Instead, the condensate evaporates.A door switch should be installed to turn off the air conditioner while the door is open.Keep the air circulation in the cabinet clear and avoid obstacles at the air inlet and air outlet. At eibabo® you only get high-quality, reliable and powerful air conditioning units from well-known manufacturers such as Kraemer & Kraus, Rittal, Schneider Electric and Siemens.  Catalogue content:In this eibabo® catalogue Cabinet enclosures > Air conditioner (switchgear cabinet) you will find items from the following product groups:Item overview:Air conditionerAir conditioningClimate controlControl cabinet air conditioningHeat exchangerIntegrationRefrigerant linesRoof structureSplit coolingTemperaturefrom the following manufacturers:Manufacturer overview catalogue Air conditioner switch cabinet:RittalSchneider Electric
Clock thermostat - You can control your heating system intelligently with a clock thermostat. The sensor in the device measures the current temperature in the room and ensures that it is reached and maintained. However, it is not always necessary that once a temperature has been set, it must be maintained 24 hours a day. Heating costs can be saved, especially at night, if there is no heating in the bedroom. The living rooms also do not have to be heated during the day if the residents are at work during this time, provided that no valve is activated in a heating circuit distributor for underfloor heating. In this case, a complete switch-off is often not sensible in terms of energy, but rather a reduction. It is enough to set the thermostat so that the desired heat is reached as soon as you get home. With a clock thermostat from the eibabo online shop, you set the desired heating times and these ensure that the rooms are always heated or cooled when it is needed. If you want to deviate from the preset temperature, you can use the so-called party button to provide an additional or extended heating cycle. These and other features are model dependent. Just take a look at our range of clock thermostats. We are sure that you will find the right model.Catalogue content:In this eibabo® catalogue Stats, switches and controllers > Room clock thermostat you will find items from the following product groups:Item overview:Analog clock thermostatBimetal thermostatBimetallic regulatorBuilt-in temperature controllerClimate controllerClock temperature controllerClock thermostatDigital clock thermostatElectronic thermostatFloor temperature controllerHeat pump controllerNeutral zone temperature controllerNeutral zone thermostatOutdoor heatingQuartz clock thermostatRadio clock thermostatReference room temperature controllerRoom clock thermostatRoom controllerRoom temperature controllerRoom thermostatRoom thermostat with time controlRoom thermostat/clock thermostatRoom thermostatclock thermostatThermostatTwo-stage controllerUniversal temperature controllerWireless clock thermostatfrom the following manufacturers:Manufacturer overview catalogue Clock thermostat:Alre-itDeviEberleEthermaGlen DimplexJungTheben
Current monitoring device - If you would like to be in control of your electrical installation, then monitor your cables and wires for correct function and proper current flow. Especially if you want to minimize downtime or failures within production processes, you can counteract any problems early and effectively with a current monitoring relay. Learn more about the types and uses of power monitoring devices here. Use our help when making a purchase decision and choose from numerous quality products at top conditions here in your eibabo® shop.Analysis and EvidenceHigh-quality current monitoring devices are able to store errors that occur for later evaluation, to communicate with other components and, if necessary, to send out alarm signals.Devices of this type are typically installed in the control cabinet and use suitable relays to protect your system against undervoltage or overvoltage or against undercurrent or overcurrent.What types of surveillance devices are there?A monitoring device is a protective relay that is used to monitor various states of an electrical system. It is therefore an electrical switch which is triggered when certain specified parameters are exceeded. The device provides protection by shutting down the system in the event of an abnormal condition. A monitoring device (also called a control relay) typically consists of two main components: a sensing circuit for detecting condition and a trigger element. The detection element is used to determine the monitored parameters. The triggering element serves to trigger the switching process.Individual settings can often be made by the user with these devices. The protection parameters can thus be adapted to the requirements of the respective system. This is done using adjustment wheels and screws or, in the case of digital relays, using buttons and a display. Among other things, the following can be set:Delay ? to avoid false alarms due to sudden power surgesReset (manual or automatic) - used to reset the electrical system after a shiftRemote Reset - to remotely reset the electrical system after a shiftAlarm ? to trigger an alarm in the event of a trip Surveillance devices fall into different categories. These are based on the parameter being monitored. This can be voltage and current, but also filling levels or temperatures. The most common monitoring devices are:Voltage monitors - trip when the voltage in an electrical system exceeds and/or falls below a specified level.Phase monitors ? are used to monitor and protect against polarity reversal, phase failure and phase asymmetry. These constantly check the phase difference between two or more phases.Current monitors - protect equipment in an electrical system from overcurrent or undercurrent. Current monitoring relays trigger when the current exceeds or falls below a predetermined value.Frequency Monitors - Used primarily in Alternating Current (AC) systems where line frequency control is required. These relays are therefore used to protect against frequency anomalies.Temperature monitors ? primarily protect against overheating by constantly monitoring the temperature of the system and the devices that are being protected. Areas of application are predominantly industrial plants where extreme temperatures are a problem.Level monitors - are switches for level control in cisterns, tanks and other storage containers. These devices are used wherever liquid levels need to be monitored. Image: Pilz S1IM #828050 current monitoring relayThe different types of current monitorsCurrent monitors are important devices when it comes to protecting electrical systems. These help prevent damage to equipment and components by shutting off a circuit in the event of a fault. There are different types of electricity monitors. Each has its own advantages and areas of application. Depending on this, please select the right type to ensure proper protection.Primary and secondary power monitorsPrimary devices are mostly part of a circuit breaker and are mainly used in electrical networks with voltages up to 1000 volts. Secondary current monitors are connected to the circuit through a current transformer, which in turn is connected to the power supply. The current transformer reduces the current to a value suitable for the function of the monitoring device. Secondary current monitors are in turn divided into the following subspecies:Electromagnetic DevicesThe devices based on the principle of electromagnetism are the most common. These consist of a core with a copper winding and an armature with attached switch contacts. When the current is off, a spring keeps the armature away from the core. When a voltage is applied, a magnetic field builds up around the core. This attracts the armature and thus switches the connected contacts. The majority of electromagnetic devices are so-called polarized relays. These contain two cores with windings, a permanent magnet and a contact rod. Operation is dependent on the polarity of the input signal. There are electromagnetic relays for alternating and direct current. Their advantages lie in high-quality galvanic isolation, low price, low contact voltage drop and low heat development. No refrigeration is required. Devices of this type are resistant to impulse loads and interference from lightning strikes. The main disadvantages are the limited mechanical and electrical service life and the low operating speed.induction relayThe principle of operation of induction relays is based on the interaction between the current induced in a conductor and a variable magnetic flux. Therefore, with alternating current, these are used as indirect protection relays. The integrated components of the device are arranged in such a way that they are aligned with each other at the set frequency of the current and are not deflected. When the frequency changes, a moving element moves, causing the contacts to close or open. We distinguish between induction devices with a frame, with a pane and with glass.differential relaySuch devices compare the current strength before the consumer and after it. This consumer is usually a power transformer. In the normal state, both values are approximately the same. However, if a short circuit occurs, this balance is disturbed. As a result, the relay closes the contacts and turns off the faulty section of the circuit. Often found in household appliances and lamps, these relays protect people from electric shock.Relays on microcircuits in the integrated electronicsThe devices work with semiconductors such as triacs or thyristors. In the basic principle, such a device compares the incoming signal with the parameters stored in the device for trouble-free operation. If there is a deviation, the relay breaks the circuit.thermal relayThermal relays work with an integrated bimetal. This heats up when an electric current is passed through it. If the current flow deviates from the specified value, the bimetallic strip deforms, causing the contacts to open and close.What should you look for in a current monitoring device?In order for the current monitor to work, its parameters must meet the requirements of the assigned tasks. When selecting a device, pay attention to the following features:Voltage in volts - this is the voltage range in which the device normally operatesCurrent in amperes - each device is rated for a specific currentTripping power in watts - this is the minimum power of the electrical current supplied for normal operationControl power in watts - this is the maximum power of electric current at which the relay will perform its functions correctly  TIPWhen making your selection, pay attention to the prevailing operating conditions. Is the device used in critical environments with high humidity, dirt, heat, cold or vibrations? Furthermore, the error detection depends on the accuracy of the measurement of the current strength in amperes. The response time of the device is another important parameter. How long does the device take from the moment of the event to triggering? Under certain circumstances, it can be advantageous to be able to individually set a delay before switching the device on or off for critical loads.As a specialist for smart home technology, we at the eibabo® online shop are your competent partner for all questions relating to intelligent electrical installation. You can get high-quality current monitoring devices from us from well-known manufacturers such as ABB, Dold, Eaton, Eltako, Hager, Pilz, Siemens and many others.  Catalogue content:In this eibabo® catalogue Relays > Current monitoring relay you will find items from the following product groups:Item overview:Current measurementCurrent measuring relayDry run protectionFuse clampsLevel measurementLevel monitoringLevel relayLevel switchLoad monitoring relayLoad relayLoad shedding relayModular installation deviceOvercurrent monitorOvercurrent monitoringOvercurrent relayPower guardPower monitoringPower monitoring devicePower monitoring relayPower relayPower window relaySecurity moduleSelectivitySupplementary moduleTest functionThree-phase monitoring deviceTransfer blocksWindow current relayfrom the following manufacturers:Manufacturer overview catalogue Current monitoring device:ABBBenderDoldEatonEberleEltakoETAFinderHagerLützeMetzMurrelektronikPhoenixPilzSchalkSchneider ElectricSiemensWAGO
Through terminal - Which feed-through terminals should you use for your control cabinet? Are terminal blocks the same as feed-through blocks? Find out here what the differences are between feed-through terminals and what they are used for. In the eibabo® technology store you can get feed-through terminal blocks from all well-known manufacturers such as ABB, Eaton, Eberle, Hager, Metz, Phoenix, Schneider Electric, Siemens, Spelsberg, TE Connectivity, WAGO, Weidmüller, Wieland and Wöhner at great prices and in large quantities. We deliver our range worldwide.Feed-through terminals fulfill several functions and are among the most important components within a control cabinet. It is mounted on the DIN rail. Feed-through terminals are connecting elements between the incoming cables and lines of an installation and the actual control cabinet installation.What is the difference between feed-through terminals and terminal blocks?Feed-through terminals are terminal blocks. 'Terminal block' is a generic term that also includes other types of terminals. These include, for example, fuse terminals and relay terminals. Other terms describe the way a terminal is constructed or its ability to connect the conductors. In these contexts, one often hears about one-tier terminals, three-tier terminals, spring-loaded terminals, push-in terminals or screw terminals. We would like to briefly discuss some of these types in the following sections.Why are feed-through terminals indispensable components in the control cabinet?Feed-through terminals offer the necessary flexibility in the control cabinet to connect rigid incoming cables and lines to the relevant fuses, actuators or other devices. A direct connection without feed-through terminals does not make sense. A clear installation would not be possible. First, the cables and lines are clearly laid out on the terminal blocks. They then lead them from there to the devices in the control cabinet. As a result, the entire installation remains flexible because there are connection points and nodes for checking and changing the system structure.Image: Phoenix PT 2.5-3L feed-through terminalEach connection that is made takes on a function previously defined in the circuit diagram. The installation of the system and the function of individual connections remains traceable. This makes later additions, repairs and maintenance easier. If you want to make changes, these can be done by reconnecting individual wires. The rigid supply lines remain unaffected.And there are other advantages: For example, you can only connect two wires to many modular installation devices. The feed-through terminal blocks offer further advantages here. An example: A fuse is intended to protect several lines. However, you can only connect the cores of one line. In order to also integrate the other lines, you can create clear bridge connections on the feed-through terminals. The electrician can also carry out insulation measurements and other control work directly on the terminal blocks. Troubleshooting is made much easier and faster.What different feed-through terminals are there?Each manufacturer builds the feed-through terminals slightly differently. However, the principle is the same. There are single-level terminals and multi-level terminals. While you can only connect one line in the single-level terminal, several incoming and outgoing lines can be installed in multi-level terminals. Use a three-tier terminal for a three-wire cable. The is designed for connecting the protective conductor, the L conductor and the N conductor. This arrangement saves an enormous amount of space in the control cabinet. Three-tier terminals are mainly found in the control cabinets of private households and in smart home installations. TIP:On some models, the protective conductor has no connection point for the outgoing line. The protective earth contact is made directly by the clamp connection with the DIN rail. Another feature that distinguishes feed-through terminals is the way the wires are fastened. The screw terminal fixes the respective wire with a screw connection. This method takes a comparatively long time, especially when the plant is complex. A spring-loaded terminal makes electrical contact with a mechanical spring. This consists of a bent, flat copper contact. The wire must be inserted through a hole in the copper contact. This is only possible if the contact is clamped with a pointed tool. When the clamping tool is removed, the spring pulls back and the wire is jammed. The connection is released in the same way. The push-in connection is another fastening variant, similar to the spring-loaded terminal. Here, too, a spring presses against the wire. In contrast to the spring-cage connection, installation is tool-free and therefore even faster. The wire is inserted into the spring shaft of the feed-through terminal and the spring locks automatically. If you want to loosen the connection, you need a pointed tool. A small screwdriver is usually sufficient, which bends the retaining spring to the side and loosens the wire. This method saves a lot of time with cores with solid conductors. Wires with flexible conductors can also be attached using wire end sleeves using this method.Solid and flexible veinsYou can connect cables with solid cores and flexible strands in feed-through terminals. Both variants and combinations are permitted. Flexible cores can easily fan out. The use of ferrules makes handling easier with spring connections.The attachment of the wire using cutting terminals is rather rare. Use this variant if your veins are particularly thin. Here, the contact is made through a small cut in the insulation.Depending on the function and area of application, cables and wires with different cross-sections are used in the electrical installation. This affects the feed-through terminals. Appropriate feed-through terminals are available for all common cable cross-sections. Whether a clamp can be used for a specific cross-section is indicated on the clamp. It is usually possible to bridge the L conductor and the N conductor using several feed-through terminals, sometimes on several levels. Suitable cable bridges are available here in the shop.markLabeling the lines helps with orientation, especially when a new employee or another electrical company takes over the system. Some terminals have labeling fields. We recommend using this option and labeling all devices and connections in a meaningful way.The design of the neutral conductor contact is another distinguishing feature. In addition to models for classic wiring, there are feed-through terminals with which an N busbar can be used. The neutral contact on these terminals is designed accordingly so that the connection can be made with one hand. When using a busbar, you need an additional terminal for feeding. To securely fix the rail, use suitable support blocks or the fastening levers on the end clamps at the beginning and end of the row. Longer rails are additionally fixed every 20 cm. To be able to use cables with five cores, use multi-level terminals to connect the outer conductors.How to use feed-through terminals in the KNX area?In addition to the classic feed-through terminals, you can get special terminal blocks for low-voltage or KNX use. These have a different color and can therefore immediately be distinguished from other terminal blocks. This also contributes to order and clarity in the control cabinet. In terms of function, these terminal blocks hardly differ from conventional terminal blocks. You can connect cables with a cross-section of up to 1.5 mm2 to these terminals.Why are feed-through terminals not closed on one side?The available space in the control cabinet is specified in modular widths (HP). These provide information about the capacity of a control cabinet. Feed-through terminals are not manufactured according to this pitch, but as narrow as possible. The narrower a terminal, the more terminals can be installed on a specific area of the DIN rail. Good to know:Feed-through terminals are not closed on one side. The missing cover saves a little space. In relation to the length of a top-hat rail, more terminals can be mounted. Since feed-through terminals are mounted directly next to each other on the DIN rail, there is no danger of touching the contacts on the open sides. Without a side cover, a terminal is narrower. A cover is only attached to the last terminal in a row.Which installation aids and which accessories are available for feed-through terminal blocks?For the construction of a control cabinet, you receive numerous well thought-out components that simplify your work. For feed-through terminals, for example, the cross-bridges and busbars already mentioned are available. In addition, you will receive separator plates and end plates, covers, feeds or end blocks as well as test plugs, fuses, labeling fields and other components.  Catalogue content:In this eibabo® catalogue Terminal blocks > Feed-through terminal block you will find items from the following product groups:Item overview:Base clampBolt clampChangeover relayCompartment clampConnecting combsConnection moduleConnection technologyDistribution blockFeed terminalFour-level clampLightning arrowMarshalling boxMini clampMotor connection terminalMotor output terminalMulti-level clampMulti-wire terminalNeutral terminalPotential clampRelay terminalSocketSpring clampsSpring clipSwitching relayTerminal block connectorThermal voltage terminal blockThrough terminalUniversal clampfrom the following manufacturers:Manufacturer overview catalogue Through terminal:ABBEatonEberleHagerMetzPhoenixSchneider ElectricSiemensSpelsbergTE ConnectivityWAGOWeidmüllerWielandWöhner
Fuse terminal - Are you looking for high-quality and space-saving fuse terminals for your control cabinet? Are terminal blocks the same as fuse blocks? Here you can find out for which use the different fuse terminals are suitable. In the eibabo® technology store, you can obtain fuse clamps inexpensively and in large quantities from all well-known manufacturers. Shipping is worldwide. Fuse terminals are among the most important components in a control cabinet and have several functions. The terminals are snapped onto the top-hat rail of the control cabinet and form the connection between the distribution level and the installation level.What is the difference between fuse terminals and terminal blocks?The terminal block is a feed-through connection for one or more cables in the control cabinet. Depending on the application, it may be beneficial to protect a pass-through connection with a fuse. Fuse terminals consist of a base that takes on the function of the classic terminal block. A fuse is used in an additional fuse link carrier. The fuses may vary depending on the model and use case. Some variants have permanently installed circuit breakers. A fuse terminal block is therefore a terminal block with a separate fuse.Why are fuse terminals one of the most important components in the control cabinet?A large number of cables and lines arrive in a control cabinet. Depending on the complexity of the system, this can be several hundred pieces. These cables and lines are often very rigid and have a large cross-section. A direct connection to the respective fuses, actuators or other devices would therefore be very difficult. At this point, terminal blocks with and without fuses are used. The cables and lines arriving in the control cabinet are first clearly laid out on the terminals. The individual flexible wires can now be routed from the terminals to the respective devices in the control cabinet. This flexibility offers advantages during installation.Image: Wago 281-611 fuse terminalEach connection now established has a specific function. This function is usually defined in a circuit diagram. Even after the control cabinet has been installed, the individual functions must remain traceable. A good overview of the system should be ensured for later extensions, change requests and maintenance work. If you would like to make changes after a while, these can now be done very easily by changing the individual wires. The handling of the rigid supply lines is therefore no longer necessary.You can only connect two wires to many modular installation devices. Here, too, the clamps play to their advantage. If, for example, you have planned several cables for a modular installation device, you can provide these with clear jumpers on the fuse terminals. Control work and measurements can also be carried out very conveniently directly on the terminals. Relocating lines and troubleshooting are made much easier.The safety clamps in detailFuse clamps can be constructed somewhat differently depending on the manufacturer. It is divided into single-level terminals and multi-level terminals. You can only connect one incoming and one outgoing line in the single-deck terminal. Several lines can be connected in multi-level terminals. For example, use a three-tier terminal for a cable with three wires. In this way you connect the protective conductor as well as the L line and the N line. This saves a lot of space and is mainly used in the private environment and in the smart home area. It is usual for the protective conductor contact to be made directly by the clamp connection with the top-hat rail. Other models have a connection point for a protective conductor.Another distinguishing feature is the different ways of attaching a cable. With a screw terminal, the respective wire is attached to the terminal using a classic screw connection. That's safe, but more time consuming. A spring-loaded terminal makes the electrical contact using a mechanical spring. The spring consists of a bent copper contact with a hole. The contact is clamped with a pointed tool and the conductor can be inserted. If you remove the clamping tool, the spring is relieved and the conductor gets stuck.Good to knowFuse clamps are suitable for fastening solid conductors and flexible strands. Both variants are permitted. The use of ferrules makes handling flexible wires easier, as they do not accidentally fan out.There is usually a pressure point for releasing this clamping connection, which can be pressed with a screwdriver or another narrow object. If you use particularly thin wires, insulation displacement terminals can be used. With these, contact is made through a small cut through the insulation.Cables and wires are selected in different cross-sections depending on their function and area of application. This affects the selection of the appropriate fuse terminal. There are suitable fuse terminals for the common cable cross-sections. Which cross-sections are suitable in each case is indicated directly on the terminal. Fuse terminals typically offer the option of bridging the L conductor and the N conductor using several terminal blocks, sometimes on different levels. The matching cross bridges are also available here in the shop. well thought outSome terminals offer fields for labeling. Use this option to keep track of the installation at all times. In addition, a distinction is made between fuse terminals in the design of the neutral conductor contact. Models marked 'NT' have special contacts for connection to an N busbar. When using a busbar, you need a clamp for the infeed as well as support blocks for secure fixing at the beginning and end of the busbar. When using 5-wire cables, you can also use multi-level terminals to connect the phase conductors.What does push-in connection mean for a fuse terminal block?A distinction is currently made between fuse terminals with three connection variants. These are the screw connection, the spring-cage connection and the push-in connection. Which connection variant you choose depends on the area of application, the costs and the expected time savings during installation. The push-in connection is the latest of these three variants. This is similar to the tension spring connection. As with the tension spring, a spring presses against the insulated conductor. The connection is therefore vibration-proof and maintenance-free. In contrast to the tension spring connection, the advantage is the tool-free installation. The wire is simply inserted into the terminal and a spring automatically locks. A standard screwdriver is sufficient to loosen the connection. This means that wiring can be carried out in a significantly shorter time. This applies in particular to cores with solid conductors. Wires with flexible conductors can also be fixed with this method using wire end sleeves. TIP:Please use square crimped ferrules for this. These offer more surface area for the spring to open. Front crimping pliers with square crimping are particularly suitable for working in hard-to-reach places and tight spaces. Small gauge conductors may not be strong enough to open the spring. Here the support of the spring opening with a screwdriver is necessary.Are there other accessories for fuse terminals?Additional accessories are available for most fuse terminals. These include the cross-bridges and busbars already mentioned, test plugs, fuses, separator plates, end plates, feeds or end blocks.Why are fuse terminals open on one side?The available space in the control cabinet is specified in modular widths (HP). These provide information about the capacity of a control cabinet. Fuse clamps are not manufactured according to this grid dimension, but as narrow as possible. The narrower a terminal, the more terminals can be installed on a specific area of the DIN rail. Since fuse terminals are typically mounted directly next to each other on the DIN rail, there is no risk of touching the contacts on the open sides. Without a side cover, a terminal is narrower. A cover is only attached to the last terminal in a row.Are there fuse terminals with a defect indicator?Some models show defects. For example, some fuse terminals have an integrated LED, which is powered by the current present. If there is a defect, the LED does not light up and the installer can quickly localize the problem.  Catalogue content:In this eibabo® catalogue Terminal blocks > Fuse terminal block you will find items from the following product groups:Item overview:AC circuit breakerActive power meterBlade fuse terminalConnection clampControl circuit breakerDevice circuit breakerDirect current machineElectricity meterEnergy meterFour-wire meterFuse clipFuse terminal blockGlass fuse clipGround terminalGuard clampMulti-level clampPlug-in circuit breakerProtective terminal blockReactive power meterScrew cap clampSpring clipSpring terminalTerminal blockTerminal blocksTerminal stripThree-phase meterTransducer counterTransfer blocksfrom the following manufacturers:Manufacturer overview catalogue Fuse terminal:HagerPhoenixSiemensWAGOWeidmüllerWieland
Protective conductor terminal - You take care of the structure of your control cabinet and use various terminal blocks to organize your electrical installation. If you are still missing protective conductor terminals to complete your system, then you have come to the right place in this catalog from our shop. Here you can get all common variants from well-known manufacturers at top conditions. Protective earth terminals belong to the series terminals and were developed for electrical distribution installation. These are capable of accommodating fine-wire, multi-wire or solid conductor cross-sections. Cables with attached ferrules can also be installed in protective conductor terminals.What is a protective conductor?The protective conductor or PE conductor (PE stands for protective earth) is primarily used to connect the masses of electrical devices and conductive elements to earth. The protective conductor is easily recognizable by its green-yellow color.Already knewThe nationwide establishment of the protective conductor in Germany, Austria and Switzerland took several decades. More than 50 years passed from the first proposal to introduce a 'neutral conductor' around 1914 to the uniform definition of the green and yellow marking in 1965.An example: Let's take the classic NYM-J 3x1.5 mm² sheathed cable. Two wires carry current here, the one with the blue insulation and the one with the brown insulation. The third wire is the green-yellow protective conductor, which normally does not carry any current. If a current-carrying phase touches a metallic housing, a so-called residual current flows through it. If there is no protective conductor, the housing is not grounded and the residual current cannot flow. If a person touches the housing, the current is returned to earth via their body. This not only results in an unpleasant discharge, but in some cases leads to burns or, in extreme cases, to an electric shock, which can lead to cardiac arrest. However, if a protective conductor is properly installed, the enclosure is connected to earth through it. The residual current can thus flow off via the protective conductor.In the control cabinet, the incoming protective conductors are sorted and fastened via protective conductor terminals.What is a terminal block or a feed-through terminal block for protective conductors?Terminal blocks fulfill several functions and are among the most important components within a control cabinet. It is mounted on the DIN rail. In general, terminal blocks are connecting elements between the incoming cables and lines of an installation and the actual control cabinet installation. Technically, the special protective conductor clamps do not differ from the clamps for external conductors or neutral conductors, but they are specially designed to accommodate the green-yellow protective conductor. TIPMany ground terminals also have a coloured, mostly green-yellow housing. Their purpose is therefore unmistakable and the terminals in the control cabinet can be recognized as such at first glance. Feed-through terminals are also often mentioned. 'Terminal block' is a generic term that also includes other types of terminals. These include, for example, fuse terminals and relay terminals. Other terms describe the way a terminal is constructed or its ability to connect the conductors. In this context one often hears about one-tier terminals, three-tier terminals, spring-loaded terminals, push-in terminals or screw terminals.Why should I use protective conductor terminals?Feed-through terminals for protective conductors are required connecting elements in the control cabinet between the rigid incoming cables or lines and the following control cabinet installation. These offer the necessary flexibility to connect the protective conductors to the end devices easily and clearly. A clear installation would not be possible without the feed-through terminals. In practice, the incoming cables and lines are clearly laid out on the terminals and the individual wires then lead from there to the devices in the control cabinet. This keeps the entire installation flexible. There are connection points and nodes for checking and changing the system structure.Image: WAGO 2002-3207 three-level terminalEach protective conductor connection that is made assumes a protective function specified in the circuit diagram. This means that both the installation of the system and the function of individual connections are always traceable. This makes later maintenance, additions or repairs easier. Changes are possible at any time by reconnecting individual lines. The rigid supply lines remain unaffected.What is the difference between protective conductor terminals?Each manufacturer builds the protective conductor terminals slightly differently. However, the principle is the same. There are single-level clamps and multi-level clamps. While you can only connect one protective wire in the single-level terminal, several incoming and outgoing lines can be installed in multi-level terminals. A multi-level arrangement saves an enormous amount of space in the control cabinet.Another distinguishing feature is the way the wires are attached. With a screw terminal, the respective wire is fixed with a screw connection. This method is comparatively complex and takes a lot of time. Especially when the system is complex, you save a lot of time by using a spring-loaded terminal. This variant makes the electrical contact using a spring. The spring usually consists of a bent, flat copper contact. The protective conductor must be inserted through a hole in the copper contact. This is only possible if the contact is clamped with a pointed tool. When the clamping tool is removed, the spring pulls back and the protective conductor is jammed. This connection is released in the same way. Push-in mounting is another connection variant. This is similar to the spring-loaded terminal. But unlike the spring-loaded connection, installation is tool-free and therefore even faster. The protective conductor is inserted into the spring shaft of the terminal and the spring locks automatically. You need a tool to loosen the connection. Bend the retaining spring to the side with a small screwdriver and the protective conductor can be loosened. This method saves a lot of time, especially for cores with solid conductors. The use of ferrules is recommended for cores with flexible conductors (strands). Fastening the conductors using insulation displacement terminals is rather rare. Use this variant if your conductors are particularly thin. Here, the contact is made through a small cut in the insulation. Cheaper in a setProtective conductor terminal blocks are available individually or in sets of 25, 40 or 50 at an attractive price advantage. The cross-section of the protective conductor also affects the protective conductor terminal. Here in the shop you can get the right protective conductor terminals for all common cable cross-sections. Whether a clamp can be used for a specific cross-section is usually stated on the clamp.Why are protective conductor terminals not closed on one side?The space in a control cabinet is almost always tight. The storage capacity of a control cabinet is generally specified in module widths (HP). Protective conductor terminals are not manufactured according to this grid dimension, but as narrow as possible. The width is determined by the design of the electrical connection and the cable cross-section. Since the terminals are mounted directly in line, there is no risk of touching the contacts on the open sides. Without the second side cover, a terminal is slightly narrower. A cover is only attached to the last terminal in a row. The narrower the individual terminal is, the more terminals can be accommodated on a specific section of the DIN rail.You can buy protective conductor terminals quickly and cheaply in the eibabo® technology store ? your competence center for smart homes and electrical installations. We offer branded products from ABB, Dehn, Hager, Phoenix, Pollmann, Schneider Electric, Siemens, WAGO, Weidmüller, Wieland in large quantities. We deliver our range worldwide.  Catalogue content:In this eibabo® catalogue Terminal blocks > Ground terminal block you will find items from the following product groups:Item overview:Actuator terminalBase clampsBuilt-in housingCage clampConnection technologyFeed terminalFeed-through terminal blockFour-level clampGround railGround terminalGround wire disconnect terminalInformation technologyInitiator terminalInstallation clampInstallation clampsMulti-level clampProtective conductorShield connection technologySingle clampSpring clampsSpring clipTerminal blocksTerminal stripTest disconnect terminalsThree-wire terminalThrough terminalTwin clampUniversal clampfrom the following manufacturers:Manufacturer overview catalogue Protective conductor terminal:ABBDehnHagerPhoenixPollmannSchneider ElectricSiemensWAGOWeidmüllerWieland
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