Combined arresters - eletric

Are you looking for combination devices to divert lightning currents and surge voltages for your electrical installation? But you are still not sure what requirements such a device has to meet? Learn more here. In order to be able to decide on a specific device, you must be aware of the dangers caused by lightning currents or surge voltages. Admittedly, these events are rare and often only last a few milliseconds. Nevertheless, major damage can result. We therefore always recommend appropriate protective measures to prevent damage to buildings and sensitive electronic devices. We support you in choosing the right item.

Source: eibabo®, Dehn DSH-TNS-255 combined arresterImage: Dehn DSH-TNS-255 combined arrester

What are combined arresters in power engineering?

Combined arresters are of enormous importance for safety in electrical engineering. These limit lightning currents and overvoltages in electrical lines and divert them. Combined arresters are therefore used to protect sensitive devices such as computers, televisions or hi-fi systems.

But what requirements do these devices combine?

To understand this, we need to take a closer look at the overvoltage phenomenon. In Germany and large parts of Europe, the mains voltage is 230V. Overvoltages go well beyond this value. These are caused by switching operations by the network operator, lightning strikes, short circuits or electrostatic discharges. The resulting consequences depend on the level of the overvoltage, the duration and the speed of the voltage pulse. If suitable protective measures are missing, fires can break out or people can be injured. Since the type and extent of a fault caused by overvoltage and lightning current cannot be predicted, protective devices are constructed in three stages. We distinguish between coarse protection (type 1), medium protection (type 2) and fine protection (type 3). With each level, the overvoltage is further reduced until it can no longer pose a threat to the end devices. Combined devices for dissipating lightning current and surge voltage usually meet the requirement classes type 1 and type 2. In the following text we will explain in more detail what this means.

Surge arresters and combination arresters are also referred to as Surge Protective Devices (SPD). They are usually installed in the installation distribution board or in the sub-distribution boards between the active conductors and earth. The devices are usually designed as pluggable modular devices or as devices for mounting on DIN rails. Other properties, some of which are optional, are:

  • connectable lightning current and surge arresters
  • high discharge capacity for lightning current surges up to 100 kA (10/350μs)
  • optical status display / defect display
  • remote signalling
  • shockproof and tolerable to vibrations
  • Connections can be labeled

 

The construction of a lightning protection system with overvoltage protection

In order to be able to decide on a specific combination arrester, you should know the entire structure of a lightning protection system with overvoltage protection.

side note

Buildings are classified in lightning protection classes I to IV. This assesses the risk of lightning strikes. The class in which a building is to be classified depends on its type, use and the damage to be expected. The lightning protection class determines the structure and dimensioning of the lightning protection system.


Whether a combination device is suitable for a building with a specific lightning protection class can usually be found in the product description. Lightning is high-energy and carries very high lightning currents. In the case of overvoltages, the currents and energy are small, but the charge difference between two potentials is very large. In order to counteract these dangers completely, such a system consists of three parts:

  • the external lightning protection
  • the internal lightning protection
  • the overvoltage protection

 

The external lightning protection

As the name suggests, external lightning protection is protective measures outside the building. These are lightning arresters, lightning conductors, earthing, fixings and so on. The external lightning protection diverts direct lightning strikes and the associated high lightning current into the ground before they reach the building. In Germany there is no obligation to install external lightning protection systems. Exceptions are buildings which:

  • are over 20 meters high
  • standing free on a hilltop
  • have a combustible roof (e.g. thatch or thatch)
  • are open to the public (cinema, museum)

 

However, external lightning protection always makes sense, even if your building does not meet any of these criteria. A lightning strike can cause serious damage. Information and high-quality items for setting up reliable external lightning protection can also be found here in the shop. Use our intelligent search.

The internal lightning protection

Effective internal lightning protection and overvoltage protection protects apartments, buildings, industrial plants and the devices in them. The internal lightning protection is designed as equipotential bonding. For this purpose, all metallic pipe installations and cable installations in a house are connected to each other and to the main earthing bar. This can prevent voltage differences, lightning flashovers in the building and the resulting danger to people and technology.

The overvoltage protection

Internal lightning protection includes overvoltage protection. This is where the combined arresters offered in this catalog come into play. In order to be able to select a suitable device, please consider the type of possible interference as well as the type of devices to be protected. As already mentioned, the overvoltage protection has a three-stage structure. Accordingly, three requirement classes for overvoltage protection devices are also available. We distinguish between type 1 (rough protection), type 2 (medium protection) or type 3 (fine protection). Type 3 standard devices provide fine protection and protect against voltages up to a certain level. Enhanced Type 2 devices provide additional protection against transient voltage spikes. The high protection standard of type 1 also protects against impulse currents. But what exactly does that mean for the combination arresters offered here, which in many cases meet the requirements of types 1 and 2?

 


Notice

Surge protection has been a mandatory part of an electrical system in Germany since December 2018 and must be installed in new buildings.


 

Type 1 surge protective devices are also known as lightning arresters. These divert high lightning currents via the internal or external lightning protection of a building. The residual voltage is reduced to a level between 6000 volts and 1300 volts. However, this basic protection is not yet sufficient to protect the end devices.

Type 2 surge protective devices provide medium protection. The residual lightning voltage, which is already reduced by the type 1 devices, is further reduced in this stage to values between 2000 volts and 600 volts. Type 2 devices also limit dangerous transient overvoltages. These are caused by the switching of motors, transformers, circuit breakers or inductive loads. Disturbances of this kind are short-lived. However, these occur more frequently and cause the tension to rise suddenly.

Type 3 protective devices further reduce the remaining overvoltage. This fine protection is installed as close as possible to the end devices to be protected.

What should you pay attention to when buying a combi arrester?

You are now familiar with the structure of a lightning protection system with overvoltage protection. With the installation of combination devices, you usually cover the requirements of test classes type 1 and type 2 with just one device. When buying, pay attention to high-quality components from trusted and well-known manufacturers. We also recommend retrofitting surge protection in older buildings, because the number of devices with sensitive electronics in our households is constantly increasing. When buying, also pay attention to:

  • mounting type
  • Rated voltage AC/DC
  • Highest continuous voltage for AC and DC
  • Dissipation capacity for lightning current surges
  • number of poles
  • Suitability for buildings with a special lightning protection class
  • Protection level (must not exceed the impulse withstand voltage of the installation and the connected equipment)

 

Considering your electrical installation in connection with the assessment of your individual protection requirements will help you to choose the right combination arrester.

 


TIP:

With a combination device, you save money and space in the control cabinet. You get easy-to-install, comprehensive protection.


 

At eibabo® you can get a large selection of combination arresters for electrical engineering in different designs. These include: CombiController, lightning current arresters, arresters for busbars, combined arresters for meter applications, type 1 + type 2 combined arresters. Also take a look at our extensive range of single-pole and multi-pole devices with integrated arrester back-up fuse.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Earthing, lightning and surge protection > Combined arrester for power supply systems you will find items from the following product groups:

Item overview:

  • Charging infrastructure
  • CombiController
  • Combined arrester
  • Combiner box
  • Complete block
  • Complete unit
  • Electromobility
  • Energy distributor
  • Fuse holder
  • Gas arrestor
  • Insulating distributor
  • Insulating housing
  • Inverter
  • Lightning protection
  • Lightning protection housing
  • Lightning protection module
  • Lightning rod
  • Loading device
  • Overvoltage protection
  • Photovoltaic
  • Photovoltaic system solution
  • Photovoltaic systems
  • Rail conductor
  • Surge protection device
  • Surge Protection Enclosure
  • SurgeController
  • System solution
  • Terminal block


from the following manufacturers:

Manufacturer overview catalogue Combined arresters - eletric:

  • ABB
  • DEHN
  • Eaton
  • Finder
  • Hager
  • OBO
  • Phoenix
  • Schneider Electric


 
Are you looking for combination devices to divert lightning currents and surge voltages for your electrical installation? But you are still not sure what requirements such a device has to meet?... read more »
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Combo devices energy technology - Guide for the purchase

Are you looking for combination devices to divert lightning currents and surge voltages for your electrical installation? But you are still not sure what requirements such a device has to meet? Learn more here. In order to be able to decide on a specific device, you must be aware of the dangers caused by lightning currents or surge voltages. Admittedly, these events are rare and often only last a few milliseconds. Nevertheless, major damage can result. We therefore always recommend appropriate protective measures to prevent damage to buildings and sensitive electronic devices. We support you in choosing the right item.

Source: eibabo®, Dehn DSH-TNS-255 combined arresterImage: Dehn DSH-TNS-255 combined arrester

What are combined arresters in power engineering?

Combined arresters are of enormous importance for safety in electrical engineering. These limit lightning currents and overvoltages in electrical lines and divert them. Combined arresters are therefore used to protect sensitive devices such as computers, televisions or hi-fi systems.

But what requirements do these devices combine?

To understand this, we need to take a closer look at the overvoltage phenomenon. In Germany and large parts of Europe, the mains voltage is 230V. Overvoltages go well beyond this value. These are caused by switching operations by the network operator, lightning strikes, short circuits or electrostatic discharges. The resulting consequences depend on the level of the overvoltage, the duration and the speed of the voltage pulse. If suitable protective measures are missing, fires can break out or people can be injured. Since the type and extent of a fault caused by overvoltage and lightning current cannot be predicted, protective devices are constructed in three stages. We distinguish between coarse protection (type 1), medium protection (type 2) and fine protection (type 3). With each level, the overvoltage is further reduced until it can no longer pose a threat to the end devices. Combined devices for dissipating lightning current and surge voltage usually meet the requirement classes type 1 and type 2. In the following text we will explain in more detail what this means.

Surge arresters and combination arresters are also referred to as Surge Protective Devices (SPD). They are usually installed in the installation distribution board or in the sub-distribution boards between the active conductors and earth. The devices are usually designed as pluggable modular devices or as devices for mounting on DIN rails. Other properties, some of which are optional, are:

  • connectable lightning current and surge arresters
  • high discharge capacity for lightning current surges up to 100 kA (10/350μs)
  • optical status display / defect display
  • remote signalling
  • shockproof and tolerable to vibrations
  • Connections can be labeled

 

The construction of a lightning protection system with overvoltage protection

In order to be able to decide on a specific combination arrester, you should know the entire structure of a lightning protection system with overvoltage protection.

side note

Buildings are classified in lightning protection classes I to IV. This assesses the risk of lightning strikes. The class in which a building is to be classified depends on its type, use and the damage to be expected. The lightning protection class determines the structure and dimensioning of the lightning protection system.


Whether a combination device is suitable for a building with a specific lightning protection class can usually be found in the product description. Lightning is high-energy and carries very high lightning currents. In the case of overvoltages, the currents and energy are small, but the charge difference between two potentials is very large. In order to counteract these dangers completely, such a system consists of three parts:

  • the external lightning protection
  • the internal lightning protection
  • the overvoltage protection

 

The external lightning protection

As the name suggests, external lightning protection is protective measures outside the building. These are lightning arresters, lightning conductors, earthing, fixings and so on. The external lightning protection diverts direct lightning strikes and the associated high lightning current into the ground before they reach the building. In Germany there is no obligation to install external lightning protection systems. Exceptions are buildings which:

  • are over 20 meters high
  • standing free on a hilltop
  • have a combustible roof (e.g. thatch or thatch)
  • are open to the public (cinema, museum)

 

However, external lightning protection always makes sense, even if your building does not meet any of these criteria. A lightning strike can cause serious damage. Information and high-quality items for setting up reliable external lightning protection can also be found here in the shop. Use our intelligent search.

The internal lightning protection

Effective internal lightning protection and overvoltage protection protects apartments, buildings, industrial plants and the devices in them. The internal lightning protection is designed as equipotential bonding. For this purpose, all metallic pipe installations and cable installations in a house are connected to each other and to the main earthing bar. This can prevent voltage differences, lightning flashovers in the building and the resulting danger to people and technology.

The overvoltage protection

Internal lightning protection includes overvoltage protection. This is where the combined arresters offered in this catalog come into play. In order to be able to select a suitable device, please consider the type of possible interference as well as the type of devices to be protected. As already mentioned, the overvoltage protection has a three-stage structure. Accordingly, three requirement classes for overvoltage protection devices are also available. We distinguish between type 1 (rough protection), type 2 (medium protection) or type 3 (fine protection). Type 3 standard devices provide fine protection and protect against voltages up to a certain level. Enhanced Type 2 devices provide additional protection against transient voltage spikes. The high protection standard of type 1 also protects against impulse currents. But what exactly does that mean for the combination arresters offered here, which in many cases meet the requirements of types 1 and 2?

 


Notice

Surge protection has been a mandatory part of an electrical system in Germany since December 2018 and must be installed in new buildings.


 

Type 1 surge protective devices are also known as lightning arresters. These divert high lightning currents via the internal or external lightning protection of a building. The residual voltage is reduced to a level between 6000 volts and 1300 volts. However, this basic protection is not yet sufficient to protect the end devices.

Type 2 surge protective devices provide medium protection. The residual lightning voltage, which is already reduced by the type 1 devices, is further reduced in this stage to values between 2000 volts and 600 volts. Type 2 devices also limit dangerous transient overvoltages. These are caused by the switching of motors, transformers, circuit breakers or inductive loads. Disturbances of this kind are short-lived. However, these occur more frequently and cause the tension to rise suddenly.

Type 3 protective devices further reduce the remaining overvoltage. This fine protection is installed as close as possible to the end devices to be protected.

What should you pay attention to when buying a combi arrester?

You are now familiar with the structure of a lightning protection system with overvoltage protection. With the installation of combination devices, you usually cover the requirements of test classes type 1 and type 2 with just one device. When buying, pay attention to high-quality components from trusted and well-known manufacturers. We also recommend retrofitting surge protection in older buildings, because the number of devices with sensitive electronics in our households is constantly increasing. When buying, also pay attention to:

  • mounting type
  • Rated voltage AC/DC
  • Highest continuous voltage for AC and DC
  • Dissipation capacity for lightning current surges
  • number of poles
  • Suitability for buildings with a special lightning protection class
  • Protection level (must not exceed the impulse withstand voltage of the installation and the connected equipment)

 

Considering your electrical installation in connection with the assessment of your individual protection requirements will help you to choose the right combination arrester.

 


TIP:

With a combination device, you save money and space in the control cabinet. You get easy-to-install, comprehensive protection.


 

At eibabo® you can get a large selection of combination arresters for electrical engineering in different designs. These include: CombiController, lightning current arresters, arresters for busbars, combined arresters for meter applications, type 1 + type 2 combined arresters. Also take a look at our extensive range of single-pole and multi-pole devices with integrated arrester back-up fuse.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Earthing, lightning and surge protection > Combined arrester for power supply systems you will find items from the following product groups:

Item overview:

  • Charging infrastructure
  • CombiController
  • Combined arrester
  • Combiner box
  • Complete block
  • Complete unit
  • Electromobility
  • Energy distributor
  • Fuse holder
  • Gas arrestor
  • Insulating distributor
  • Insulating housing
  • Inverter
  • Lightning protection
  • Lightning protection housing
  • Lightning protection module
  • Lightning rod
  • Loading device
  • Overvoltage protection
  • Photovoltaic
  • Photovoltaic system solution
  • Photovoltaic systems
  • Rail conductor
  • Surge protection device
  • Surge Protection Enclosure
  • SurgeController
  • System solution
  • Terminal block


from the following manufacturers:

Manufacturer overview catalogue Combined arresters - eletric:

  • ABB
  • DEHN
  • Eaton
  • Finder
  • Hager
  • OBO
  • Phoenix
  • Schneider Electric
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