{"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\/pl\/blog\/type-1-surge-protection-device-vs-type-2-spd\/","title":{"rendered":"Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 1 VS typu 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\/pl\/product-category\/ac-power-surge-protection\/type-1-lightning-surge-protection-device\/\"><strong>Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 1<\/strong><\/a> i SPD typu 2, kt\u00f3re pomog\u0105 Ci zrozumie\u0107 r\u00f3\u017cnice mi\u0119dzy nimi, scenariusze zastosowa\u0144 i dokona\u0107 w\u0142a\u015bciwego wyboru.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">2. Urz\u0105dzenie przeciwprzepi\u0119ciowe typu 1 kontra SPD typu 2<\/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 G\u0142\u00f3wna funkcja SPD typu 1 i 2<\/h2>\r\n<a href=\"https:\/\/www.britecelectric.com\/pl\/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 Typ 1 Urz\u0105dzenie przeciwprzepi\u0119ciowe 25 kA\" width=\"800\" \/><\/a>\r\n<div><strong>SPD typu 1 (urz\u0105dzenie wy\u0142adowcze piorunowe):<\/strong><\/div>\r\n<div>G\u0142\u00f3wna funkcja: Zapewnia ochron\u0119 przed bezpo\u015brednimi uderzeniami pioruna lub cz\u0119\u015bciowymi pr\u0105dami piorunowymi. Umieszczany zwykle przy g\u0142\u00f3wnym wej\u015bciu do budynku, daje ochron\u0119 pierwszego stopnia (podstawow\u0105).<\/div>\r\n<div>Podstawowe zadanie: Obs\u0142uguje i przekierowuje du\u017ce pr\u0105dy piorunowe, aby zapobiec uszkodzeniom sprz\u0119tu i linii znajduj\u0105cych si\u0119 poni\u017cej.<\/div>\r\n<div><\/div>\r\n<div><strong>Typ 2 SPD (urz\u0105dzenie kontroluj\u0105ce ci\u015bnienie):<\/strong><\/div>\r\n<div>G\u0142\u00f3wna funkcja: S\u0142u\u017cy do ochrony przed przepi\u0119ciami spowodowanymi dzia\u0142aniem prze\u0142\u0105cznika i przepi\u0119ciami szcz\u0105tkowymi w wyniku indukowanych uderze\u0144 pioruna. Zwykle instaluje si\u0119 go w skrzynkach rozdzielczych (np. w pod\u0142ogowych skrzynkach rozdzielczych) i zapewnia drugi poziom (ochron\u0119 po\u015bredni\u0105).<\/div>\r\n<div>Podstawowe zadanie: Ogranicza napi\u0119cie resztkowe do bezpiecznego poziomu dla urz\u0105dze\u0144 ko\u0144cowych, s\u0142u\u017c\u0105c jako podstawowa ochrona wra\u017cliwego sprz\u0119tu elektronicznego.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.2 G\u0142\u00f3wne parametry testu<\/h2>\r\n<div><strong>Jednofazowy SPD typu 1:<\/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\/pl\/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 Typ 2 Urz\u0105dzenie przeciwprzepi\u0119ciowe 20 kA dla TN-C\" width=\"800\" \/><\/a><\/div>\r\n<div><strong>SPD typu 2:<\/strong><\/div>\r\n<div>Nominalny pr\u0105d roz\u0142adowania (I<sub>n<\/sub>): Podstawowy parametr. Wskazuje standardowy pr\u0105d testowy (kszta\u0142t fali 8\/20 \u03bcs), kt\u00f3ry SPD mo\u017ce wytrzyma\u0107 wielokrotnie. Na przyk\u0142ad: 20 kA (8\/20\u03bcs).<\/div>\r\n<div>Maksymalny pr\u0105d roz\u0142adowania (I<sub>max<\/sub>): Wskazuje maksymalny pr\u0105d roz\u0142adowania (kszta\u0142t fali 8\/20 \u03bcs), jaki SPD mo\u017ce wytrzyma\u0107 podczas pojedynczej operacji.<\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<div><\/div>\r\n<h2 class=\"wp-block-heading\">2.3 Przebiegi testowe<\/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 Miejsce instalacji<\/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 Powi\u0105zanie zewn\u0119trznego systemu ochrony przeciwprzepi\u0119ciowej<\/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 Koordynacja<\/h2>\r\nSPD typu 1 i typu 2 musz\u0105 wsp\u00f3\u0142pracowa\u0107. Nale\u017cy zachowa\u0107 mi\u0119dzy nimi pewn\u0105 odleg\u0142o\u015b\u0107 w linii (zazwyczaj zaleca si\u0119, aby wynosi\u0142a co najmniej 10 metr\u00f3w) lub nale\u017cy zastosowa\u0107 urz\u0105dzenia odsprz\u0119gaj\u0105ce (takie jak dedykowane d\u0142awiki), aby w przypadku przepi\u0119cia zadzia\u0142a\u0142 najpierw SPD typu 1 w celu rozproszenia wi\u0119kszo\u015bci energii, a nast\u0119pnie zadzia\u0142a\u0142 SPD typu 2, aby ograniczy\u0107 napi\u0119cie szcz\u0105tkowe do ni\u017cszego poziomu. Je\u015bli odleg\u0142o\u015b\u0107 jest niewystarczaj\u0105ca, du\u017cy udar mo\u017ce omin\u0105\u0107 Typ 1 i uszkodzi\u0107 Typ 2.\r\n\r\n&nbsp;\r\n<h2 class=\"wp-block-heading\">Czy potrzebuj\u0119 SPD typu 1 czy typu 2?<\/h2>\r\nJest to proces decyzyjny, kt\u00f3ry pomo\u017ce Ci dokona\u0107 wyboru:\r\n<h3><strong>Czy budynek posiada zewn\u0119trzn\u0105 ochron\u0119 przeciwprzepi\u0119ciow\u0105?<\/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>Ocena ryzyka przepi\u0119\u0107 na przychodz\u0105cej linii energetycznej<\/strong><\/h3>\r\nNawet bez zewn\u0119trznej instalacji odgromowej, je\u015bli Tw\u00f3j budynek znajduje si\u0119 na otwartej przestrzeni, na wzg\u00f3rzu lub posiada d\u0142ugie napowietrzne linie energetyczne, ryzyko uderzenia pioruna jest wysokie. Zainstalowanie SPD typu 1 mo\u017ce zapewni\u0107 wy\u017cszy poziom ochrony.\r\n<h3><strong>Zdecyduj o wyborze<\/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\">Koncepcja stopniowanej (skoordynowanej) ochrony<\/h2>\r\n<h3>Dlaczego konieczna jest stopniowana ochrona?<\/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>Typowy schemat stopniowanej ochrony<\/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\">Cz\u0119sto zadawane pytania<\/h2>\r\n<strong>Czy mog\u0119 zainstalowa\u0107 jednofazowy SPD typu 1 i typu 2?<\/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>R\u00f3\u017cnica mi\u0119dzy kombinowanym Spd typu 1 + 2 a instalacj\u0105 ich osobno<\/strong>\r\n<div>Po\u0142\u0105czony SPD typu 1+2: Pojedyncze urz\u0105dzenie integruje modu\u0142y typu 1 i typu 2. Jego zalety obejmuj\u0105 oszcz\u0119dno\u015b\u0107 miejsca i \u0142atw\u0105 instalacj\u0119, dzi\u0119ki czemu szczeg\u00f3lnie nadaje si\u0119 do scenariuszy z ograniczon\u0105 przestrzeni\u0105 w g\u0142\u00f3wnej skrzynce rozdzielczej. Przeszed\u0142 testy koordynacyjne w celu zapewnienia w\u0142a\u015bciwej kompatybilno\u015bci modu\u0142\u00f3w.<\/div>\r\n<div><\/div>\r\n<div>Oddzielna instalacja: zapewnia maksymaln\u0105 elastyczno\u015b\u0107 i \u0142atwo\u015b\u0107 konserwacji. Je\u015bli modu\u0142 typu 1 ulegnie uszkodzeniu, mo\u017cna wymieni\u0107 tylko modu\u0142 typu 1 bez wp\u0142ywu na modu\u0142 typu 2. Nale\u017cy jednak zapewni\u0107 mi\u0119dzy nimi wystarczaj\u0105c\u0105 odleg\u0142o\u015b\u0107 lub zastosowa\u0107 urz\u0105dzenie odsprz\u0119gaj\u0105ce.<\/div>\r\n<div><\/div>\r\n<strong>U\u017cywam listew przeciwprzepi\u0119ciowych w moich gniazdkach. Czy musz\u0119 instalowa\u0107 SPD typu 2?<\/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>Jednofazowy SPD VS Tr\u00f3jfazowy SPD typu 1<\/strong>\r\n\r\nJednofazowe ograniczniki SPD s\u0105 stosowane w jednofazowych systemach zasilania (jeden przew\u00f3d fazowy i jeden przew\u00f3d neutralny), natomiast tr\u00f3jfazowe ograniczniki typu 1 s\u0105 stosowane w tr\u00f3jfazowych uk\u0142adach zasilania (trzy przewody pod napi\u0119ciem i jeden przew\u00f3d neutralny lub trzy przewody pod napi\u0119ciem, jeden przew\u00f3d neutralny i jeden przew\u00f3d uziemiaj\u0105cy), zaprojektowane w celu ochrony wszystkich przewod\u00f3w fazowych przed pot\u0119\u017cnymi udarami przepi\u0119ciowymi, takimi jak bezpo\u015brednie uderzenia pioruna.\r\n<h2 class=\"wp-block-heading\">Wniosek<\/h2>\r\n<div>SPD Typ 1 kontra Typ 2? Wyb\u00f3r pomi\u0119dzy SPD Typu 1 i Typu 2 nie jest kwesti\u0105 albo-albo, ale raczej kwesti\u0105 tego, jak zbudowa\u0107 skuteczn\u0105 hierarchi\u0119 ochrony odgromowej.<\/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>Najbezpieczniejsz\u0105 i najbardziej niezawodn\u0105 strategi\u0105 jest przestrzeganie zasady wielopoziomowej ochrony: wdro\u017cenie typu 1 przy g\u0142\u00f3wnych wej\u015bciach, typu 2 w skrzynkach rozdzielczych i listew przeciwprzepi\u0119ciowych w ko\u0144cowych lokalizacjach sprz\u0119tu. Dzi\u0119ki temu warstwowemu systemowi ochrony mo\u017cesz zapewni\u0107 najbardziej kompleksow\u0105 ochron\u0119 sprz\u0119tu elektrycznego i mienia.<\/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\/pl\/wp-json\/wp\/v2\/blog\/2241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/media\/2246"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/media?parent=2241"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/pl\/wp-json\/wp\/v2\/blog_category?post=2241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}