{"id":2241,"date":"2025-11-19T14:11:15","date_gmt":"2025-11-19T06:11:15","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&#038;p=2241"},"modified":"2025-11-19T15:12:37","modified_gmt":"2025-11-19T07:12:37","slug":"type-1-surge-protection-device-vs-type-2-spd","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/fi\/blog\/type-1-surge-protection-device-vs-type-2-spd\/","title":{"rendered":"Tyypin 1 ylij\u00e4nnitesuojalaite VS tyypin 2 SPD"},"content":{"rendered":"In modern electrical systems, surge protectors (SPDs) are critical devices for protecting against damage from lightning strikes and switch surges. However, many people are confused by the different types, such as Type 1 and Type 2\u00a0surge protection device.\r\n\r\nWhat Is the difference between Type 1 and Type 2 SPD?This article will provide an in-depth comparison of <a href=\"https:\/\/www.britecelectric.com\/fi\/product-category\/ac-power-surge-protection\/type-1-lightning-surge-protection-device\/\"><strong>Tyypin 1 ylij\u00e4nnitesuojalaite<\/strong><\/a> ja Type 2 SPD:t, joiden avulla voit ymm\u00e4rt\u00e4\u00e4 niiden erot, sovellusskenaariot ja tehd\u00e4 oikean valinnan.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2. Tyypin 1 ylij\u00e4nnitesuojalaite vs tyypin 2 SPD<\/h2>\r\nSurge protectors (SPDs) are the \"safety valves\" of electrical systems. Type 1 and Type 2 are the two most commonly used SPDs. They each have their own functions and work together to build a complete protection system.\r\n<h2 class=\"wp-block-heading\">2.1 Tyypin 1 ja tyypin 2 SPD:n p\u00e4\u00e4toiminto<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/fi\/product\/br-25m-4p-type-1-25ka-surge-arrester-for-tns\/\" rel=\"attachment wp-att-1601\"><img class=\"alignnone wp-image-1601\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2024\/08\/BR-25M-4P.jpg\" alt=\"BR-25M 4P tyypin 1 25 kA salama ylij\u00e4nnitesuojalaite\" width=\"800\" \/><\/a>\r\n<div><strong>Tyypin 1 SPD (salamavirtapurkauslaite):<\/strong><\/div>\r\n<div>P\u00e4\u00e4toiminto: Suojaa suorilta salamaniskuilta tai osittaisilta salamavirroilta. Yleens\u00e4 sijoitettuna rakennuksen p\u00e4\u00e4sis\u00e4\u00e4ntuloon, se antaa ensimm\u00e4isen tason (perus) suojauksen.<\/div>\r\n<div>Ydinteht\u00e4v\u00e4: K\u00e4sittelee ja ohjaa uudelleen suuria salamavirtoja est\u00e4\u00e4kseen laitteiden ja linjojen vaurioitumisen my\u00f6t\u00e4virtaan.<\/div>\r\n<div><\/div>\r\n<div><strong>Tyypin 2 SPD (paineenhallintalaite):<\/strong><\/div>\r\n<div>P\u00e4\u00e4toiminto: K\u00e4ytet\u00e4\u00e4n suojaamaan kytkimien toiminnasta aiheutuvilta j\u00e4nnitteilt\u00e4 ja salamaniskujen j\u00e4\u00e4nn\u00f6spiikkeilt\u00e4. Se asennetaan tyypillisesti jakokoteloihin (kuten lattiajakokoteloihin) ja tarjoaa toisen tason (v\u00e4lisuojaus).<\/div>\r\n<div>Ydinteht\u00e4v\u00e4: Rajoittaa p\u00e4\u00e4telaitteiden j\u00e4\u00e4nn\u00f6sj\u00e4nnitteen turvalliselle tasolle ja toimii herkkien elektronisten laitteiden ensisijaisena suojana.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.2 P\u00e4\u00e4testiparametrit<\/h2>\r\n<div><strong>Tyypin 1 SPD yksivaiheinen:<\/strong><\/div>\r\n<div>Impulse Current (I&lt;sub&gt;imp&lt;\/sub&gt;): The most critical parameter. It indicates the SPD's ability to withstand a typical lightning current, including peak current (10\/350\u03bcs waveform), charge quantity, and other comprehensive requirements. For example: 25 kA (10\/350\u03bcs).<\/div>\r\n<div><\/div>\r\n<div><a href=\"https:\/\/www.britecelectric.com\/fi\/product\/br-20-3p-type-2-20ka-surge-protective-device-for-tn-c\/\" rel=\"attachment wp-att-1711\"><img class=\"alignnone size-full wp-image-1711\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2024\/09\/BR-20-3P-1.jpg\" alt=\"BR-20 3P Type 2 20kA ylij\u00e4nnitesuoja TN-C:lle\" width=\"800\" \/><\/a><\/div>\r\n<div><strong>Tyyppi 2 SPD:<\/strong><\/div>\r\n<div>Nimellinen purkausvirta (I<sub>n<\/sub>): Ydinparametri. Se ilmaisee standarditestivirran (8\/20 \u03bcs aaltomuodon), jonka SPD voi kest\u00e4\u00e4 useita kertoja. Esimerkiksi: 20 kA (8\/20\u03bcs).<\/div>\r\n<div>Suurin purkausvirta (I<sub>max<\/sub>): Ilmaisee suurimman purkausvirran (8\/20 \u03bcs aaltomuoto), jonka SPD voi kest\u00e4\u00e4 yhdess\u00e4 toimenpiteess\u00e4.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.3 Testaa aaltomuotoja<\/h2>\r\n10\/350\u03bcs waveform (for Type 1 testing): This waveform simulates some of the current characteristics of a direct lightning strike. Its current rise is slow, but its duration is long, carrying approximately 20 times the energy of the 8\/20\u03bcs waveform, making it extremely destructive.\r\n\r\n8\/20\u03bcs waveform (for Type 2 testing): This waveform simulates induced lightning and switching surges. The current rises quickly, its duration is short, and its energy is relatively small.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.4 Asennuspaikka<\/h2>\r\nType 1 lightning surge protection device: Installed in the building's main distribution panel (main incoming line box), located after the electricity meter and before or after the main circuit breaker (depending on product design).\r\n\r\nType 2 SPD: Installed in distribution panels, such as floor distribution boxes or distribution boxes in critical equipment rooms (e.g., data centers, elevator control rooms).\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.5 Ulkoisen ylij\u00e4nnitesuojaj\u00e4rjestelm\u00e4n suhde<\/h2>\r\nType 1 SPD: Must be installed at the power inlet of buildings equipped with external lightning protection systems (lightning rods, down conductors). This is a mandatory requirement of international standards (such as IEC 62305) because it effectively handles direct lightning current coupled from the down conductor to the power line.\r\n\r\nType 2 SPD: Not directly mandatory with external lightning protection systems. Type 2 SPDs are required to handle induced surges regardless of whether the building has an external lightning protection system.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.6 Koordinointi<\/h2>\r\nTyypin 1 ja tyypin 2 SPD:n on toimittava yhdess\u00e4. Niiden v\u00e4lill\u00e4 on s\u00e4ilytett\u00e4v\u00e4 tietty johtoet\u00e4isyys (yleens\u00e4 suositellaan v\u00e4hint\u00e4\u00e4n 10 metri\u00e4), tai irrotuslaitteita (kuten erillisi\u00e4 reaktoreita) tulee k\u00e4ytt\u00e4\u00e4 sen varmistamiseksi, ett\u00e4 tyypin 1 SPD laukeaa ensin suurimman osan energiasta ja sitten tyypin 2 SPD laukaisee j\u00e4\u00e4nn\u00f6sj\u00e4nnitteen rajoittamiseksi alemmalle tasolle. Jos et\u00e4isyys on riitt\u00e4m\u00e4t\u00f6n, suuri ylij\u00e4nnite voi ohittaa tyypin 1 ja vahingoittaa tyyppi\u00e4 2.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">Tarvitsenko tyypin 1 vai tyypin 2 SPD:n?<\/h2>\r\nT\u00e4m\u00e4 on p\u00e4\u00e4t\u00f6ksentekoprosessi, joka auttaa sinua tekem\u00e4\u00e4n valinnan:\r\n<h3><strong>Onko rakennuksessa ulkoinen ylij\u00e4nnitesuojaj\u00e4rjestelm\u00e4?<\/strong><\/h3>\r\nYes: You must install a Type 1 SPD in the main distribution box.\r\n\r\nNo\/Unsure: You can skip Type 1, but installing Type 2 is strongly recommended.\r\n<h3><strong>Ylij\u00e4nniteriskin arviointi tulevassa voimalinjassa<\/strong><\/h3>\r\nJopa ilman ulkoista ukkossuojaj\u00e4rjestelm\u00e4\u00e4, jos rakennuksesi sijaitsee avoimella alueella, kukkulan laella tai siin\u00e4 on pitk\u00e4t ilmajohdot, salamaniskujen riski on suuri. Tyypin 1 SPD:n asentaminen voi tarjota korkeamman suojan.\r\n<h3><strong>P\u00e4\u00e4t\u00e4 valinta<\/strong><\/h3>\r\nScenario A (Standard residential building, no external lightning protection): Installing a Type 2 SPD in the main distribution box provides sufficient protection.\r\n\r\nScenario B (Villa\/commercial building with lightning rod): A Type 1 SPD must be installed in the main distribution box, and Type 2 SPDs must be installed in floor distribution boxes or distribution boxes for critical equipment.\r\n\r\nScenario C (Risk compromise): If space or budget is limited, a Type 1+2 combined SPD can be installed in the main distribution box (see FAQ).\r\n<h2 class=\"wp-block-heading\">Asteisen (koordinoidun) suojan k\u00e4site<\/h2>\r\n<h3>Miksi asteittainen suojaus on tarpeen?<\/h3>\r\nNo single SPD can perfectly handle all types of surges. The concept of tiered protection is:\r\n\r\nType 1 (Level 1): Intercepts and discharges the vast majority of the enormous energy (e.g., 90%) at the inlet.\r\n\r\nType 2 (Level 2): \u200b\u200bFurther limits the residual surge voltage after the first level, bringing it within the equipment's safe range.\r\n\r\nType 3 (Fine Protection): Uses surge strips at the equipment end to provide fine protection for the last mile.\r\n\r\nThis is like a line of defense: the first line weakens the main force, the second line clears the residue, and ensures the safety of the main base (your equipment).\r\n<h3>Tyypillinen asteittainen suojausj\u00e4rjestelm\u00e4<\/h3>\r\nA complete solution is as follows:\r\n\r\nLevel I: Main Distribution Box \u2192 Type 1 SPD\r\n\r\nLevel II: Floor Distribution Box \u2192 Type 2 SPD\r\n\r\nLevel III: Equipment Front-End (e.g., sockets) \u2192 Type 3 SPD (surge power strip)\r\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\r\n<strong>Voinko asentaa sek\u00e4 tyypin 1 ett\u00e4 tyypin 2 yksivaiheisen SPD:n?<\/strong>\r\n\r\nAbsolutely, and it's best practice. Type 1 and Type 2 single phase SPDs work together to provide tiered protection from the inlet to the device.\r\n\r\n<strong>Ero tyypin 1+2 yhdistetyn spd:n ja niiden erillisen asentamisen v\u00e4lill\u00e4<\/strong>\r\n<div>Tyypin 1+2 yhdistetty SPD: Yksi laite integroi sek\u00e4 tyypin 1 ett\u00e4 tyypin 2 moduulit. Sen etuja ovat tilans\u00e4\u00e4st\u00f6 ja helppo asennus, mik\u00e4 tekee siit\u00e4 erityisen sopivan tilanteisiin, joissa p\u00e4\u00e4jakokotelossa on v\u00e4h\u00e4n tilaa. Se on l\u00e4p\u00e4issyt koordinaatiotestauksen varmistaakseen moduulien oikean yhteensopivuuden.<\/div>\r\n<div><\/div>\r\n<div>Erillinen asennus: Tarjoaa maksimaalisen joustavuuden ja huollettavuuden. Jos tyypin 1 moduuli on vaurioitunut, vain tyypin 1 moduuli voidaan vaihtaa ilman, ett\u00e4 se vaikuttaa tyypin 2 moduuliin. Niiden v\u00e4lill\u00e4 on kuitenkin varmistettava riitt\u00e4v\u00e4 et\u00e4isyys tai k\u00e4ytett\u00e4v\u00e4 irrotuslaitetta.<\/div>\r\n<div><\/div>\r\n<strong>K\u00e4yt\u00e4n ylij\u00e4nniteliuskoja pistorasiassani. Pit\u00e4\u00e4k\u00f6 minun asentaa Type 2 SPD?<\/strong>\r\n\r\nAbsolutely necessary. Surge power strips (Type 3 SPDs) have limited discharge capabilities; they are designed to absorb very small residual surges at the device end. They cannot withstand major surge energy transmitted from the power line.\r\n\r\nWithout a Type 2 SPD dissipating energy at the pre-amplifier stage, a larger surge could directly destroy your surge power strip and connected devices. Type 2 SPDs are the mainstay in protecting the entire circuit branch.\r\n\r\n&nbsp;\r\n\r\n<strong>Yksivaiheinen SPD VS Kolmivaiheinen tyypin 1 SPD<\/strong>\r\n\r\nYksivaiheisia SPD:it\u00e4 k\u00e4ytet\u00e4\u00e4n yksivaiheisissa tehonsy\u00f6tt\u00f6j\u00e4rjestelmiss\u00e4 (yksi j\u00e4nnitteellinen johto ja yksi nollajohto), kun taas kolmivaiheisia tyypin 1 SPD:it\u00e4 k\u00e4ytet\u00e4\u00e4n kolmivaiheisissa tehonsy\u00f6tt\u00f6j\u00e4rjestelmiss\u00e4 (kolme j\u00e4nnitteist\u00e4 johtoa ja yksi nollajohdin tai kolme j\u00e4nnitteist\u00e4 johtoa, yksi nollajohto ja yksi maajohto), jotka on suunniteltu suojaamaan kaikkia vaihejohtoja suurilta ylij\u00e4nniteiskuilta, kuten suorilta salamaniskuilta.\r\n<h2 class=\"wp-block-heading\">Johtop\u00e4\u00e4t\u00f6s<\/h2>\r\n<div>SPD Type 1 Vs Type 2? Valinta tyypin 1 ja tyypin 2 SPD:n v\u00e4lill\u00e4 ei ole joko-tai-kysymys, vaan pikemminkin kysymys tehokkaan salamansuojaushierarkian rakentamisesta.<\/div>\r\n<div>Type 1 SPDs are the \"heavy armor\" against direct lightning strikes and are the mandatory first choice for buildings with external lightning protection systems.<\/div>\r\n<div>Type 2 SPDs are the \"main force\" against everyday surges and are core protection equipment that almost all buildings should have installed.<\/div>\r\n<div>Turvallisin ja luotettavin strategia on noudattaa porrastetun suojauksen periaatetta: k\u00e4yt\u00e4 tyyppi\u00e4 1 p\u00e4\u00e4sis\u00e4\u00e4nk\u00e4yntiin, tyyppi\u00e4 2 jakokaappiin ja ylij\u00e4nniteliuskoja lopullisiin laitteistopaikkoihin. T\u00e4m\u00e4n kerrostetun suojaj\u00e4rjestelm\u00e4n avulla voit tarjota kattavimman suojan s\u00e4hk\u00f6laitteillesi ja omaisuudellesi.<\/div>","protected":false},"featured_media":2246,"parent":0,"menu_order":106,"template":"","meta":{"_acf_changed":false},"blog_category":[9],"class_list":["post-2241","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-industry-news"],"acf":{"des":"Comparison of Type 1 surge protection device and Type 2 SPD to help you understand their differences, application scenarios, and make the right choice.","txt":"In modern electrical systems, surge protectors (SPDs) are critical devices for protecting against damage from lightning strikes and switch surges. However, many people are confused by the different types, such as Type 1 and Type 2\u00a0surge protection device.\r\n\r\nWhat Is the difference between Type 1 and Type 2 SPD?This article will provide an in-depth comparison of <a href=\"https:\/\/www.britecelectric.com\/product-category\/ac-power-surge-protection\/type-1-lightning-surge-protection-device\/\"><strong>Type 1 surge protection device<\/strong><\/a> and Type 2 SPDs to help you understand their differences, application scenarios, and make the right choice.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2. Type 1 Surge Protection Device Vs Type 2 SPD<\/h2>\r\nSurge protectors (SPDs) are the \"safety valves\" of electrical systems. Type 1 and Type 2 are the two most commonly used SPDs. They each have their own functions and work together to build a complete protection system.\r\n<h2 class=\"wp-block-heading\">2.1 Main function of Type 1 and Type 2 SPD<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/product\/br-25m-4p-type-1-25ka-surge-arrester-for-tns\/\" rel=\"attachment wp-att-1601\"><img class=\"alignnone wp-image-1601\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2024\/08\/BR-25M-4P.jpg\" alt=\"BR-25M 4P Type 1 25kA Lightning Surge Protection Device\" width=\"800\" \/><\/a>\r\n<div><strong>Type 1 SPD (Lightning Current Discharge Device):<\/strong><\/div>\r\n<div>Main Function: Provides protection from direct lightning strikes or partial lightning currents. Usually placed at the main entry point of a building, it gives first-level (basic) protection.<\/div>\r\n<div>Core Task: Handles and redirects large lightning currents to stop damage to equipment and lines downstream.<\/div>\r\n<div><\/div>\r\n<div><strong>Type 2 SPD (Pressure Control Device):<\/strong><\/div>\r\n<div>Main Function: Used for protection against surges from switch operation and residual surges from induced lightning strikes. It is typically installed in distribution boxes (such as floor distribution boxes) and provides second-level (intermediate protection).<\/div>\r\n<div>Core Task: Limits residual voltage to a safe level for terminal equipment, serving as the primary protection for sensitive electronic equipment.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.2 Main Test Parameters<\/h2>\r\n<div><strong>Type 1 SPD Single Phase:<\/strong><\/div>\r\n<div>Impulse Current (I&lt;sub&gt;imp&lt;\/sub&gt;): The most critical parameter. It indicates the SPD's ability to withstand a typical lightning current, including peak current (10\/350\u03bcs waveform), charge quantity, and other comprehensive requirements. For example: 25 kA (10\/350\u03bcs).<\/div>\r\n<div><\/div>\r\n<div><a href=\"https:\/\/www.britecelectric.com\/product\/br-20-3p-type-2-20ka-surge-protective-device-for-tn-c\/\" rel=\"attachment wp-att-1711\"><img class=\"alignnone size-full wp-image-1711\" src=\"https:\/\/www.britecelectric.com\/wp-content\/uploads\/2024\/09\/BR-20-3P-1.jpg\" alt=\"BR-20 3P Type 2 20kA Surge Protective Device For TN-C\" width=\"800\" \/><\/a><\/div>\r\n<div><strong>Type 2 SPD:<\/strong><\/div>\r\n<div>Nominal Discharge Current (I&lt;sub&gt;n&lt;\/sub&gt;): The core parameter. It indicates the standard test current (8\/20\u03bcs waveform) that the SPD can withstand multiple times. For example: 20 kA (8\/20\u03bcs).<\/div>\r\n<div>Maximum Discharge Current (I&lt;sub&gt;max&lt;\/sub&gt;): Indicates the maximum discharge current (8\/20\u03bcs waveform) that the SPD can withstand in a single operation.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.3 Test Waveforms<\/h2>\r\n10\/350\u03bcs waveform (for Type 1 testing): This waveform simulates some of the current characteristics of a direct lightning strike. Its current rise is slow, but its duration is long, carrying approximately 20 times the energy of the 8\/20\u03bcs waveform, making it extremely destructive.\r\n\r\n8\/20\u03bcs waveform (for Type 2 testing): This waveform simulates induced lightning and switching surges. The current rises quickly, its duration is short, and its energy is relatively small.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.4 Installation Location<\/h2>\r\nType 1 lightning surge protection device: Installed in the building's main distribution panel (main incoming line box), located after the electricity meter and before or after the main circuit breaker (depending on product design).\r\n\r\nType 2 SPD: Installed in distribution panels, such as floor distribution boxes or distribution boxes in critical equipment rooms (e.g., data centers, elevator control rooms).\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.5 Reltation of External Surge Protection System<\/h2>\r\nType 1 SPD: Must be installed at the power inlet of buildings equipped with external lightning protection systems (lightning rods, down conductors). This is a mandatory requirement of international standards (such as IEC 62305) because it effectively handles direct lightning current coupled from the down conductor to the power line.\r\n\r\nType 2 SPD: Not directly mandatory with external lightning protection systems. Type 2 SPDs are required to handle induced surges regardless of whether the building has an external lightning protection system.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2.6 Coordination<\/h2>\r\nType 1 and Type 2 SPDs need to work together. A certain line distance must be maintained between them (generally recommended to be at least 10 meters), or decoupling devices (such as dedicated reactors) should be used to ensure that, in the event of a surge, the Type 1 SPD trips first to dissipate most of the energy, and then the Type 2 SPD trips to limit the residual voltage to a lower level. If the distance is insufficient, a large surge may bypass the Type 1 and damage the Type 2.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">Do I Need Type 1 Or Type 2 SPD?<\/h2>\r\nThis is a decision-making process to help you make a choice:\r\n<h3><strong>Does The Building Have An External Surge Protection System?<\/strong><\/h3>\r\nYes: You must install a Type 1 SPD in the main distribution box.\r\n\r\nNo\/Unsure: You can skip Type 1, but installing Type 2 is strongly recommended.\r\n<h3><strong>Surge Risk Assessment At Incoming Power Line<\/strong><\/h3>\r\nEven without an external lightning protection system, if your building is located in an open area, on a hilltop, or has long overhead power lines, the risk of lightning strikes is high. Installing a Type 1 SPD can provide a higher level of protection.\r\n<h3><strong>Decide Selection<\/strong><\/h3>\r\nScenario A (Standard residential building, no external lightning protection): Installing a Type 2 SPD in the main distribution box provides sufficient protection.\r\n\r\nScenario B (Villa\/commercial building with lightning rod): A Type 1 SPD must be installed in the main distribution box, and Type 2 SPDs must be installed in floor distribution boxes or distribution boxes for critical equipment.\r\n\r\nScenario C (Risk compromise): If space or budget is limited, a Type 1+2 combined SPD can be installed in the main distribution box (see FAQ).\r\n<h2 class=\"wp-block-heading\">Concept Of Graded (Coordinated) Protection<\/h2>\r\n<h3>Why Is Graded Protection Necessary?<\/h3>\r\nNo single SPD can perfectly handle all types of surges. The concept of tiered protection is:\r\n\r\nType 1 (Level 1): Intercepts and discharges the vast majority of the enormous energy (e.g., 90%) at the inlet.\r\n\r\nType 2 (Level 2): \u200b\u200bFurther limits the residual surge voltage after the first level, bringing it within the equipment's safe range.\r\n\r\nType 3 (Fine Protection): Uses surge strips at the equipment end to provide fine protection for the last mile.\r\n\r\nThis is like a line of defense: the first line weakens the main force, the second line clears the residue, and ensures the safety of the main base (your equipment).\r\n<h3>Typical Graded Protection Scheme<\/h3>\r\nA complete solution is as follows:\r\n\r\nLevel I: Main Distribution Box \u2192 Type 1 SPD\r\n\r\nLevel II: Floor Distribution Box \u2192 Type 2 SPD\r\n\r\nLevel III: Equipment Front-End (e.g., sockets) \u2192 Type 3 SPD (surge power strip)\r\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\r\n<strong>Can I Install Both Type 1 And Type 2 Single Phase SPD?<\/strong>\r\n\r\nAbsolutely, and it's best practice. Type 1 and Type 2 single phase SPDs work together to provide tiered protection from the inlet to the device.\r\n\r\n<strong>Difference Between Type 1+2 Combined Spd And Installing Them Separately<\/strong>\r\n<div>Type 1+2 Combined SPD: A single device integrates both Type 1 and Type 2 modules. Its advantages include space saving and easy installation, making it particularly suitable for scenarios with limited space in the main distribution box. It has passed coordination testing to ensure proper module compatibility.<\/div>\r\n<div><\/div>\r\n<div>Separate Installation: Offers maximum flexibility and maintainability. If a Type 1 module is damaged, only the Type 1 module can be replaced without affecting the Type 2 module. However, sufficient distance must be ensured between them, or a decoupling device must be used.<\/div>\r\n<div><\/div>\r\n<strong>I Use Surge Strips On My Outlets. Do I Need To Install Type 2 SPD?<\/strong>\r\n\r\nAbsolutely necessary. Surge power strips (Type 3 SPDs) have limited discharge capabilities; they are designed to absorb very small residual surges at the device end. They cannot withstand major surge energy transmitted from the power line.\r\n\r\nWithout a Type 2 SPD dissipating energy at the pre-amplifier stage, a larger surge could directly destroy your surge power strip and connected devices. Type 2 SPDs are the mainstay in protecting the entire circuit branch.\r\n\r\n&nbsp;\r\n\r\n<strong>Single Phase SPD VS Three phase Type 1 SPD<\/strong>\r\n\r\nSingle-phase SPDs are used in single-phase power supply systems (one live wire and one neutral wire), while three-phase Type 1 SPDs are used in three-phase power supply systems (three live wires and one neutral wire or three live wires, one neutral wire, and one ground wire), designed to protect all phase wires from massive surge impacts such as direct lightning strikes.\r\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\r\n<div>SPD Type 1 Vs Type 2?Choosing between Type 1 and Type 2 SPDs is not an either-or question, but rather a question of how to build an effective lightning protection hierarchy.<\/div>\r\n<div>Type 1 SPDs are the \"heavy armor\" against direct lightning strikes and are the mandatory first choice for buildings with external lightning protection systems.<\/div>\r\n<div>Type 2 SPDs are the \"main force\" against everyday surges and are core protection equipment that almost all buildings should have installed.<\/div>\r\n<div>The safest and most reliable strategy is to follow a tiered protection principle: deploy Type 1 at main entrances, Type 2 at distribution boxes, and surge strips at final equipment locations. Through this layered protection system, you can provide the most comprehensive protection for your electrical equipment and property.<\/div>"},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/blog\/2241","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\/2246"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/media?parent=2241"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/fi\/wp-json\/wp\/v2\/blog_category?post=2241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}