{"id":2568,"date":"2026-07-31T09:12:19","date_gmt":"2026-07-31T01:12:19","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=2568"},"modified":"2026-08-14T09:12:52","modified_gmt":"2026-08-14T01:12:52","slug":"type-1-surge-protection-device-faq","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/fi\/blog\/type-1-surge-protection-device-faq-10-most-asked-questions-answered\/","title":{"rendered":"Type 1 Surge Protection Device FAQ: 10 Most Asked Questions Answered"},"content":{"rendered":"Type 1 surge protection devices generate more datasheet confusion than any other product in the SPD range. The ratings look similar to Type 2 devices until you notice the waveform is different, the installation rules are stricter, and the question of whether you legally need one has no universal answer. If you specify, quote or install at the service entrance, the ten questions below cover what actually comes up in practice \u2014 from what the device protects you against to how you know when it has stopped doing so.\r\n

Type 1 Surge Protection Device FAQ: 10 Key Questions Answered<\/b><\/strong><\/h2>\r\n

What Does a Type 1 Surge Protection Device Protect Against?<\/b><\/strong><\/h3>\r\nA Type 1 device protects against partial lightning current \u2014 the portion of a direct strike that is conducted into your electrical installation rather than dissipated through the lightning protection system. When a strike hits a building\u2019s air terminals or a nearby overhead line, a share of that energy travels along the incoming conductors, and a Type 1 SPD is the component designed to divert it safely to earth before it enters the installation.\r\n\r\nThis is a different job from suppressing the induced and switching transients Type 2 devices handle. Type 1 protection is about surviving a high-charge event; Type 2 is about managing the more frequent, lower-energy surges that follow.\r\n

How Does Type 1 Differ From Type 2 and Type 3?<\/b><\/strong><\/h3>\r\nThe difference is defined by the test class each device must pass. A Type 1 SPD is tested with impulse current (Iimp) on a 10\/350 \u00b5s waveform, which simulates the long, high-charge profile of a lightning discharge. A Type 2 device is tested with nominal discharge current (In) on an 8\/20 \u00b5s waveform \u2014 much shorter, carrying a fraction of the energy at the same peak current. A Type 3 device provides final protection at the equipment and must always sit downstream of a Type 2.\r\n\r\nLocation follows from test class: Type 1 at the origin of the installation, Type 2 at distribution boards, Type 3 at or near the load.\r\n

Is a Type 1 Surge Protection Device Mandatory for My Building?<\/b><\/strong><\/h3>\r\nA Type 1 device becomes necessary when your building has an external lightning protection system, or where a risk assessment to IEC 62305 identifies direct strike exposure \u2014 overhead supply lines, isolated or tall structures, and high ground flash density all push the assessment that way. Where no LPS exists and the supply is underground in a low-exposure area, Type 2 protection at the origin is often sufficient. Since national wiring rules differ, treat the risk assessment as the deciding document.\r\n

What Do Iimp and the 10\/350\u00b5s Waveform Mean?<\/b><\/strong><\/h3>\r\nIimp is the impulse current rating: the peak lightning current, in kA, that the device can discharge without failing, tested on the 10\/350 \u00b5s waveform. The two numbers describe the shape of the test pulse \u2014 roughly 10 microseconds to rise to peak, and 350 microseconds to decay to half of it.\r\n\r\nThat long tail is what matters. A 25kA 10\/350 \u00b5s pulse carries far more charge than a 25kA 8\/20 \u00b5s pulse, which is why a Type 1 SPD 12.5kA Iimp rating cannot be compared directly with a Type 2 device quoting a much larger figure on the shorter waveform. When you compare products, always check which waveform the number refers to.\r\n\r\n[caption id=\"\" align=\"alignleft\" width=\"800\"]\"Britec<\/a> A Type 1 SPD with Uc, Iimp, In, Imax and Up printed on the module face \u2014 note that Iimp is quoted on the 10\/350 \u00b5s waveform, not 8\/20 \u00b5s.[\/caption]\r\n

Where Should a Type 1 Surge Protection Device Be Installed?<\/b><\/strong><\/h3>\r\nInstall it at the origin of the installation \u2014 the main board or service entrance panel where power first enters the building \u2014 so surge energy is intercepted at the boundary before it propagates through the wiring.\r\n\r\nTwo rules govern the installation. Keep total connecting conductor length, live plus earth side, within about 0.5 metres, since every extra centimetre adds inductive voltage that raises the protection level your equipment actually sees. And keep the earthing connection short, direct and low-impedance; a Type 1 device is only as good as the path it discharges into.\r\n

Does a Type 1 SPD Need a Backup Breaker or Fuse?<\/b><\/strong><\/h3>\r\nYes, unless the upstream overcurrent device already meets the manufacturer\u2019s specified rating. Backup protection disconnects the SPD if it fails to a short circuit at end of life, preventing a fire risk or a trip of the whole installation. Use the fuse or breaker type stated in the documentation, not an assumption \u2014 undersizing causes nuisance disconnection during ordinary surge activity, while oversizing leaves the device unprotected in the very failure mode it should cover.\r\n

How Long Does a Type 1 Surge Protection Device Last?<\/b><\/strong><\/h3>\r\nThere is no fixed service life, because a Type 1 SPD wears out by absorbing energy rather than by running hours. In moderate exposure, five to fifteen years is realistic \u2014 but a single severe strike can end that life immediately. Treat the status indicator, not the calendar, as the authority; on a device over ten years old with no maintenance history, planned replacement is cheaper than discovering its condition during the next storm.\r\n

How Do I Know If My Type 1 SPD Has Failed?<\/b><\/strong><\/h3>\r\nFour signals are worth checking: a status window turned from green to red, a tripped backup fuse or breaker on the SPD circuit (usually meaning the device failed short), visible discolouration or burn marks indicating thermal damage, and on monitored installations a remote signalling contact reporting to your control system. Make the check routine after any significant storm \u2014 a device that sacrificed itself protecting you looks unchanged until you read the indicator.\r\n

Can a Type 1 SPD Work Alone Without Type 2 or Type 3?<\/b><\/strong><\/h3>\r\nRarely. A Type 1 device survives enormous energy, but its voltage protection level (Up) is typically higher than sensitive electronics tolerate \u2014 it reduces a catastrophic surge to a survivable one, not a harmless one. For installations with drives, controllers or IT equipment, coordinate a Type 2 device downstream with adequate cable length or a decoupling element between stages. A combined Type 1+2 unit achieves both duties in one housing where panel space is limited.\r\n

Which Configuration Suits TN-S, TN-C, and TT Systems?<\/b><\/strong><\/h3>\r\nConfiguration follows the earthing arrangement. TN-C uses a 3P device on three-phase supply; TN-S uses 4P or 3P+N; TT generally requires 3P+N with a spark gap between neutral and earth, so no continuous leakage path exists to the local electrode. On single-phase supplies the same logic gives 1P for TN-C and 1P+N or 2P for TN-S and TT. Confirm the earthing system on site before ordering \u2014 a mismatch either leaves a conductor unprotected or creates an unwanted current path.\r\n\r\n[caption id=\"\" align=\"alignleft\" width=\"800\"]\"Britec<\/a> The same Type 1 platform in a 3P configuration for TN-C systems \u2014 pole count and internal arrangement follow the earthing system on site.[\/caption]\r\n

Quick Reference Table: Question and Short Answer<\/b><\/strong><\/h2>\r\nThe table below condenses all ten answers into a single reference you can keep alongside a datasheet.\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Question<\/b><\/strong><\/td>\r\nShort Answer<\/b><\/strong><\/td>\r\n<\/tr>\r\n
What does it protect against?<\/b><\/strong><\/td>\r\nPartial lightning current conducted into the installation from a direct or nearby strike<\/td>\r\n<\/tr>\r\n
How does it differ from Type 2 and 3?<\/b><\/strong><\/td>\r\nTested with Iimp on 10\/350 \u00b5s; Type 2 uses In on 8\/20 \u00b5s; Type 3 protects at the load<\/td>\r\n<\/tr>\r\n
Is it mandatory?<\/b><\/strong><\/td>\r\nGenerally where an external LPS exists or an IEC 62305 risk assessment identifies direct strike exposure<\/td>\r\n<\/tr>\r\n
What are Iimp and 10\/350 \u00b5s?<\/b><\/strong><\/td>\r\nPeak lightning current the device can discharge, tested on a long, high-charge waveform<\/td>\r\n<\/tr>\r\n
Where is it installed?<\/b><\/strong><\/td>\r\nAt the origin of the installation, with connecting leads under about 0.5 m<\/td>\r\n<\/tr>\r\n
Does it need backup protection?<\/b><\/strong><\/td>\r\nYes \u2014 a fuse or breaker of the type and rating stated by the manufacturer<\/td>\r\n<\/tr>\r\n
How long does it last?<\/b><\/strong><\/td>\r\nTypically 5\u201315 years, but a single severe strike can end its life immediately<\/td>\r\n<\/tr>\r\n
How do I know it has failed?<\/b><\/strong><\/td>\r\nRed status indicator, tripped backup device, visible damage, or a remote contact alarm<\/td>\r\n<\/tr>\r\n
Can it work alone?<\/b><\/strong><\/td>\r\nRarely \u2014 its Up is too high for sensitive equipment; coordinate a Type 2 downstream<\/td>\r\n<\/tr>\r\n
Which configuration do I need?<\/b><\/strong><\/td>\r\n3P for TN-C, 4P or 3P+N for TN-S, 3P+N with N-PE spark gap for TT<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

Deep-Dive Topics Worth Exploring Further<\/b><\/strong><\/h2>\r\nFour subjects sit just beyond these answers and reward further reading. Coordination between stages determines how energy is shared between Type 1 and Type 2 devices, and depends on cable length or decoupling inductors. The lightning protection zone concept in IEC 62305 explains why device selection changes at each boundary. Risk assessment methodology gives you a defensible basis for deciding whether a Type 1 device is required at all. And conductor routing influences real-world performance more than most specification decisions.\r\n

Why Choose BRITEC Type 1 Surge Protection Devices<\/b><\/strong><\/h2>\r\nBritec Electric Wenzhou has manufactured surge protective devices since 2003, with ISO 9001 and ISO 14001 certification and products tested to IEC 61643-11 and UL 1449. Impulse testing is performed in-house, so designs and production batches alike can be verified against the 10\/350 \u00b5s waveform rather than only at certification milestones.\r\n\r\nThe Type 1 range covers 1P, 2P, 3P and 4P configurations for TN-C, TN-S and TT systems, with Iimp ratings from 12.5kA to 50kA per pole, replaceable modules, visual status indication and optional remote signalling contacts. Type 1+2 combined units are available where a single device must cover both duties, and cross-reference support is provided for the major European brands if you are replacing an existing installation.\r\n

FAQ<\/b><\/strong><\/h2>\r\n

Q1: Can a Type 1 surge protection device be used outdoors?<\/b><\/strong><\/h3>\r\nOnly inside a suitably rated enclosure. The modules are designed for DIN rail mounting in a protected environment, so outdoor use requires an IP-rated cabinet keeping out moisture, dust and direct sun. Confirm the ambient temperature range too, as heat accelerates ageing of the internal components.\r\n

Q2: Do Type 1 SPDs work with solar PV or DC systems?<\/b><\/strong><\/h3>\r\nNot the AC versions. DC systems have no natural zero crossing to extinguish an arc, so they need purpose-built DC or PV devices with the correct DC voltage rating and arc-extinction design. Britec supplies PV Type 1+2 and PV Type 2 protectors for exactly this application.\r\n

Q3: How much does a Type 1 surge protection device cost?<\/b><\/strong><\/h3>\r\nPrice depends mainly on Iimp rating, pole count and technology, so a 1P 12.5kA unit sits well below a 4P 50kA device. Because the device protects an entire installation, compare on Iimp, Up and certification rather than on unit price alone \u2014 for a current quotation on specific configurations, contact the manufacturer directly.\r\n

Q4: Can I install a Type 1 SPD myself or do I need an electrician?<\/b><\/strong><\/h3>\r\nInstallation at the origin of the installation is work for a qualified electrician. It involves the incoming supply, backup protection coordination and earthing arrangements, and in most jurisdictions it must be certified. Owners can safely handle inspection \u2014 reading the status window \u2014 but not installation or replacement.\r\n

Q5: Do Type 1 SPDs require an external lightning protection system?<\/b><\/strong><\/h3>\r\nNo, but the two are closely linked. An external LPS is the usual trigger for requiring a Type 1 device, since it creates a defined path for partial lightning current to enter the installation. Type 1 devices are also specified without an LPS where overhead supply lines or high exposure justify it through risk assessment.\r\n

Johtop\u00e4\u00e4t\u00f6s<\/b><\/strong><\/h2>\r\nMost of the confusion around Type 1 surge protection devices resolves once you hold on to a single distinction \u2014 the 10\/350 \u00b5s waveform behind the Iimp rating is what separates a lightning current arrester from every other SPD, and it explains the installation position at the origin, the mandatory backup protection, the strict 0.5 metre lead length, the need for coordinated Type 2 protection downstream, and why the kA figure cannot be compared with a Type 2 datasheet; get the earthing configuration right for your TN-C, TN-S or TT system, check the status indicator after every storm, and the device will do its job quietly for years. If you are specifying Type 1 protection for a project, contact Britec Electric at sales@britecelectric.com or +86 0577-6260 5321 for datasheets, certificates and a quotation on the configuration and Iimp rating your installation requires \u2014 our technical team responds to all enquiries within 24 hours.","protected":false},"featured_media":2412,"parent":0,"menu_order":50,"template":"","meta":{"_acf_changed":false},"blog_category":[9],"class_list":["post-2568","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-industry-news"],"acf":{"des":"A Type 1 surge protection device sits at the service entrance and handles partial lightning current, but the specifications behind it confuse many installers and specifiers. This article answers the ten questions asked most often about Type 1 SPDs in a direct, quotable format. It explains what a Type 1 device actually protects against, how it differs from Type 2 and Type 3, and when installation becomes mandatory. It clarifies datasheet terms including Iimp and the 10\/350 microsecond waveform, sets out where the device belongs in the distribution board, and covers backup breaker requirements. Further answers address realistic service life, how to recognise a failed unit, whether a Type 1 device can work alone without downstream protection, and which configuration suits TN-S, TN-C and TT earthing systems.","txt":"Type 1 surge protection devices generate more datasheet confusion than any other product in the SPD range. The ratings look similar to Type 2 devices until you notice the waveform is different, the installation rules are stricter, and the question of whether you legally need one has no universal answer. If you specify, quote or install at the service entrance, the ten questions below cover what actually comes up in practice \u2014 from what the device protects you against to how you know when it has stopped doing so.\r\n

Type 1 Surge Protection Device FAQ: 10 Key Questions Answered<\/b><\/strong><\/h2>\r\n

What Does a Type 1 Surge Protection Device Protect Against?<\/b><\/strong><\/h3>\r\nA Type 1 device protects against partial lightning current \u2014 the portion of a direct strike that is conducted into your electrical installation rather than dissipated through the lightning protection system. When a strike hits a building\u2019s air terminals or a nearby overhead line, a share of that energy travels along the incoming conductors, and a Type 1 SPD is the component designed to divert it safely to earth before it enters the installation.\r\n\r\nThis is a different job from suppressing the induced and switching transients Type 2 devices handle. Type 1 protection is about surviving a high-charge event; Type 2 is about managing the more frequent, lower-energy surges that follow.\r\n

How Does Type 1 Differ From Type 2 and Type 3?<\/b><\/strong><\/h3>\r\nThe difference is defined by the test class each device must pass. A Type 1 SPD is tested with impulse current (Iimp) on a 10\/350 \u00b5s waveform, which simulates the long, high-charge profile of a lightning discharge. A Type 2 device is tested with nominal discharge current (In) on an 8\/20 \u00b5s waveform \u2014 much shorter, carrying a fraction of the energy at the same peak current. A Type 3 device provides final protection at the equipment and must always sit downstream of a Type 2.\r\n\r\nLocation follows from test class: Type 1 at the origin of the installation, Type 2 at distribution boards, Type 3 at or near the load.\r\n

Is a Type 1 Surge Protection Device Mandatory for My Building?<\/b><\/strong><\/h3>\r\nA Type 1 device becomes necessary when your building has an external lightning protection system, or where a risk assessment to IEC 62305 identifies direct strike exposure \u2014 overhead supply lines, isolated or tall structures, and high ground flash density all push the assessment that way. Where no LPS exists and the supply is underground in a low-exposure area, Type 2 protection at the origin is often sufficient. Since national wiring rules differ, treat the risk assessment as the deciding document.\r\n

What Do Iimp and the 10\/350\u00b5s Waveform Mean?<\/b><\/strong><\/h3>\r\nIimp is the impulse current rating: the peak lightning current, in kA, that the device can discharge without failing, tested on the 10\/350 \u00b5s waveform. The two numbers describe the shape of the test pulse \u2014 roughly 10 microseconds to rise to peak, and 350 microseconds to decay to half of it.\r\n\r\nThat long tail is what matters. A 25kA 10\/350 \u00b5s pulse carries far more charge than a 25kA 8\/20 \u00b5s pulse, which is why a Type 1 SPD 12.5kA Iimp rating cannot be compared directly with a Type 2 device quoting a much larger figure on the shorter waveform. When you compare products, always check which waveform the number refers to.\r\n\r\n[caption id=\"\" align=\"alignleft\" width=\"800\"]\"Britec<\/a> A Type 1 SPD with Uc, Iimp, In, Imax and Up printed on the module face \u2014 note that Iimp is quoted on the 10\/350 \u00b5s waveform, not 8\/20 \u00b5s.[\/caption]\r\n

Where Should a Type 1 Surge Protection Device Be Installed?<\/b><\/strong><\/h3>\r\nInstall it at the origin of the installation \u2014 the main board or service entrance panel where power first enters the building \u2014 so surge energy is intercepted at the boundary before it propagates through the wiring.\r\n\r\nTwo rules govern the installation. Keep total connecting conductor length, live plus earth side, within about 0.5 metres, since every extra centimetre adds inductive voltage that raises the protection level your equipment actually sees. And keep the earthing connection short, direct and low-impedance; a Type 1 device is only as good as the path it discharges into.\r\n

Does a Type 1 SPD Need a Backup Breaker or Fuse?<\/b><\/strong><\/h3>\r\nYes, unless the upstream overcurrent device already meets the manufacturer\u2019s specified rating. Backup protection disconnects the SPD if it fails to a short circuit at end of life, preventing a fire risk or a trip of the whole installation. Use the fuse or breaker type stated in the documentation, not an assumption \u2014 undersizing causes nuisance disconnection during ordinary surge activity, while oversizing leaves the device unprotected in the very failure mode it should cover.\r\n

How Long Does a Type 1 Surge Protection Device Last?<\/b><\/strong><\/h3>\r\nThere is no fixed service life, because a Type 1 SPD wears out by absorbing energy rather than by running hours. In moderate exposure, five to fifteen years is realistic \u2014 but a single severe strike can end that life immediately. Treat the status indicator, not the calendar, as the authority; on a device over ten years old with no maintenance history, planned replacement is cheaper than discovering its condition during the next storm.\r\n

How Do I Know If My Type 1 SPD Has Failed?<\/b><\/strong><\/h3>\r\nFour signals are worth checking: a status window turned from green to red, a tripped backup fuse or breaker on the SPD circuit (usually meaning the device failed short), visible discolouration or burn marks indicating thermal damage, and on monitored installations a remote signalling contact reporting to your control system. Make the check routine after any significant storm \u2014 a device that sacrificed itself protecting you looks unchanged until you read the indicator.\r\n

Can a Type 1 SPD Work Alone Without Type 2 or Type 3?<\/b><\/strong><\/h3>\r\nRarely. A Type 1 device survives enormous energy, but its voltage protection level (Up) is typically higher than sensitive electronics tolerate \u2014 it reduces a catastrophic surge to a survivable one, not a harmless one. For installations with drives, controllers or IT equipment, coordinate a Type 2 device downstream with adequate cable length or a decoupling element between stages. A combined Type 1+2 unit achieves both duties in one housing where panel space is limited.\r\n

Which Configuration Suits TN-S, TN-C, and TT Systems?<\/b><\/strong><\/h3>\r\nConfiguration follows the earthing arrangement. TN-C uses a 3P device on three-phase supply; TN-S uses 4P or 3P+N; TT generally requires 3P+N with a spark gap between neutral and earth, so no continuous leakage path exists to the local electrode. On single-phase supplies the same logic gives 1P for TN-C and 1P+N or 2P for TN-S and TT. Confirm the earthing system on site before ordering \u2014 a mismatch either leaves a conductor unprotected or creates an unwanted current path.\r\n\r\n[caption id=\"\" align=\"alignleft\" width=\"800\"]\"Britec<\/a> The same Type 1 platform in a 3P configuration for TN-C systems \u2014 pole count and internal arrangement follow the earthing system on site.[\/caption]\r\n

Quick Reference Table: Question and Short Answer<\/b><\/strong><\/h2>\r\nThe table below condenses all ten answers into a single reference you can keep alongside a datasheet.\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Question<\/b><\/strong><\/td>\r\nShort Answer<\/b><\/strong><\/td>\r\n<\/tr>\r\n
What does it protect against?<\/b><\/strong><\/td>\r\nPartial lightning current conducted into the installation from a direct or nearby strike<\/td>\r\n<\/tr>\r\n
How does it differ from Type 2 and 3?<\/b><\/strong><\/td>\r\nTested with Iimp on 10\/350 \u00b5s; Type 2 uses In on 8\/20 \u00b5s; Type 3 protects at the load<\/td>\r\n<\/tr>\r\n
Is it mandatory?<\/b><\/strong><\/td>\r\nGenerally where an external LPS exists or an IEC 62305 risk assessment identifies direct strike exposure<\/td>\r\n<\/tr>\r\n
What are Iimp and 10\/350 \u00b5s?<\/b><\/strong><\/td>\r\nPeak lightning current the device can discharge, tested on a long, high-charge waveform<\/td>\r\n<\/tr>\r\n
Where is it installed?<\/b><\/strong><\/td>\r\nAt the origin of the installation, with connecting leads under about 0.5 m<\/td>\r\n<\/tr>\r\n
Does it need backup protection?<\/b><\/strong><\/td>\r\nYes \u2014 a fuse or breaker of the type and rating stated by the manufacturer<\/td>\r\n<\/tr>\r\n
How long does it last?<\/b><\/strong><\/td>\r\nTypically 5\u201315 years, but a single severe strike can end its life immediately<\/td>\r\n<\/tr>\r\n
How do I know it has failed?<\/b><\/strong><\/td>\r\nRed status indicator, tripped backup device, visible damage, or a remote contact alarm<\/td>\r\n<\/tr>\r\n
Can it work alone?<\/b><\/strong><\/td>\r\nRarely \u2014 its Up is too high for sensitive equipment; coordinate a Type 2 downstream<\/td>\r\n<\/tr>\r\n
Which configuration do I need?<\/b><\/strong><\/td>\r\n3P for TN-C, 4P or 3P+N for TN-S, 3P+N with N-PE spark gap for TT<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

Deep-Dive Topics Worth Exploring Further<\/b><\/strong><\/h2>\r\nFour subjects sit just beyond these answers and reward further reading. Coordination between stages determines how energy is shared between Type 1 and Type 2 devices, and depends on cable length or decoupling inductors. The lightning protection zone concept in IEC 62305 explains why device selection changes at each boundary. Risk assessment methodology gives you a defensible basis for deciding whether a Type 1 device is required at all. And conductor routing influences real-world performance more than most specification decisions.\r\n

Why Choose BRITEC Type 1 Surge Protection Devices<\/b><\/strong><\/h2>\r\nBritec Electric Wenzhou has manufactured surge protective devices since 2003, with ISO 9001 and ISO 14001 certification and products tested to IEC 61643-11 and UL 1449. Impulse testing is performed in-house, so designs and production batches alike can be verified against the 10\/350 \u00b5s waveform rather than only at certification milestones.\r\n\r\nThe Type 1 range covers 1P, 2P, 3P and 4P configurations for TN-C, TN-S and TT systems, with Iimp ratings from 12.5kA to 50kA per pole, replaceable modules, visual status indication and optional remote signalling contacts. Type 1+2 combined units are available where a single device must cover both duties, and cross-reference support is provided for the major European brands if you are replacing an existing installation.\r\n

FAQ<\/b><\/strong><\/h2>\r\n

Q1: Can a Type 1 surge protection device be used outdoors?<\/b><\/strong><\/h3>\r\nOnly inside a suitably rated enclosure. The modules are designed for DIN rail mounting in a protected environment, so outdoor use requires an IP-rated cabinet keeping out moisture, dust and direct sun. Confirm the ambient temperature range too, as heat accelerates ageing of the internal components.\r\n

Q2: Do Type 1 SPDs work with solar PV or DC systems?<\/b><\/strong><\/h3>\r\nNot the AC versions. DC systems have no natural zero crossing to extinguish an arc, so they need purpose-built DC or PV devices with the correct DC voltage rating and arc-extinction design. Britec supplies PV Type 1+2 and PV Type 2 protectors for exactly this application.\r\n

Q3: How much does a Type 1 surge protection device cost?<\/b><\/strong><\/h3>\r\nPrice depends mainly on Iimp rating, pole count and technology, so a 1P 12.5kA unit sits well below a 4P 50kA device. Because the device protects an entire installation, compare on Iimp, Up and certification rather than on unit price alone \u2014 for a current quotation on specific configurations, contact the manufacturer directly.\r\n

Q4: Can I install a Type 1 SPD myself or do I need an electrician?<\/b><\/strong><\/h3>\r\nInstallation at the origin of the installation is work for a qualified electrician. It involves the incoming supply, backup protection coordination and earthing arrangements, and in most jurisdictions it must be certified. Owners can safely handle inspection \u2014 reading the status window \u2014 but not installation or replacement.\r\n

Q5: Do Type 1 SPDs require an external lightning protection system?<\/b><\/strong><\/h3>\r\nNo, but the two are closely linked. An external LPS is the usual trigger for requiring a Type 1 device, since it creates a defined path for partial lightning current to enter the installation. Type 1 devices are also specified without an LPS where overhead supply lines or high exposure justify it through risk assessment.\r\n

Conclusion<\/b><\/strong><\/h2>\r\nMost of the confusion around Type 1 surge protection devices resolves once you hold on to a single distinction \u2014 the 10\/350 \u00b5s waveform behind the Iimp rating is what separates a lightning current arrester from every other SPD, and it explains the installation position at the origin, the mandatory backup protection, the strict 0.5 metre lead length, the need for coordinated Type 2 protection downstream, and why the kA figure cannot be compared with a Type 2 datasheet; get the earthing configuration right for your TN-C, TN-S or TT system, check the status indicator after every storm, and the device will do its job quietly for years. If you are specifying Type 1 protection for a project, contact Britec Electric at sales@britecelectric.com or +86 0577-6260 5321 for datasheets, certificates and a quotation on the configuration and Iimp rating your installation requires \u2014 our technical team responds to all enquiries within 24 hours."},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/blog\/2568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/media\/2412"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/media?parent=2568"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/blog_category?post=2568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}