{"id":2241,"date":"2025-11-19T14:11:15","date_gmt":"2025-11-19T06:11:15","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&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\/da\/blog\/type-1-surge-protection-device-vs-type-2-spd\/","title":{"rendered":"Type 1 Oversp\u00e6ndingsbeskyttelsesanordning VS Type 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 Type 1 oversp\u00e6ndingsbeskyttelsesanordning<\/strong><\/a> og Type 2 SPD'er for at hj\u00e6lpe dig med at forst\u00e5 deres forskelle, applikationsscenarier og tr\u00e6ffe det rigtige valg.\r\n\r\n \r\n

2. Type 1 Oversp\u00e6ndingsbeskyttelsesanordning 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

2.1 Hovedfunktion af Type 1 og Type 2 SPD<\/h2>\r\n\"BR-25M<\/a>\r\n
Type 1 SPD (Lightning Current Discharge Device):<\/strong><\/div>\r\n
Hovedfunktion: Giver beskyttelse mod direkte lynnedslag eller delvise lynstr\u00f8mme. Normalt placeret ved hovedindgangen til en bygning, giver den f\u00f8rste niveau (grundl\u00e6ggende) beskyttelse.<\/div>\r\n
Kerneopgave: H\u00e5ndterer og omdirigerer store lynstr\u00f8mme for at stoppe skader p\u00e5 udstyr og ledninger nedstr\u00f8ms.<\/div>\r\n
<\/div>\r\n
Type 2 SPD (trykkontrolenhed):<\/strong><\/div>\r\n
Hovedfunktion: Anvendes til beskyttelse mod oversp\u00e6nding fra afbryderdrift og resterende oversp\u00e6nding fra inducerede lynnedslag. Det er typisk installeret i fordelingsbokse (s\u00e5som gulvfordelingsbokse) og giver andet niveau (mellembeskyttelse).<\/div>\r\n
Kerneopgave: Begr\u00e6nser restsp\u00e6nding til et sikkert niveau for terminaludstyr, der tjener som den prim\u00e6re beskyttelse for f\u00f8lsomt elektronisk udstyr.<\/div>\r\n
<\/div>\r\n
<\/div>\r\n

2.2 Hovedtestparametre<\/h2>\r\n
Type 1 SPD enkeltfaset:<\/strong><\/div>\r\n
Impulse Current (I<sub>imp<\/sub>): 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>\r\n
\"BR-20<\/a><\/div>\r\n
Type 2 SPD:<\/strong><\/div>\r\n
Nominel udledningsstr\u00f8m (In<\/sub>): Kerneparameteren. Det angiver standardteststr\u00f8mmen (8\/20\u03bcs b\u00f8lgeform), som SPD'en kan modst\u00e5 flere gange. For eksempel: 20 kA (8\/20\u03bcs).<\/div>\r\n
Maksimal afladningsstr\u00f8m (Imax<\/sub>): Angiver den maksimale afladningsstr\u00f8m (8\/20\u03bcs b\u00f8lgeform), som SPD'en kan modst\u00e5 i en enkelt operation.<\/div>\r\n
<\/div>\r\n
<\/div>\r\n
<\/div>\r\n

2.3 Test b\u00f8lgeformer<\/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 \r\n

2.4 Installationssted<\/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 \r\n

2.5 Relation af eksternt oversp\u00e6ndingsbeskyttelsessystem<\/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 \r\n

2.6 Koordinering<\/h2>\r\nType 1 og Type 2 SPD'er skal arbejde sammen. Der skal opretholdes en vis linjeafstand mellem dem (anbefales generelt at v\u00e6re mindst 10 meter), eller afkoblingsanordninger (s\u00e5som dedikerede reaktorer) b\u00f8r bruges for at sikre, at i tilf\u00e6lde af en stigning, udl\u00f8ser Type 1 SPD f\u00f8rst for at sprede det meste af energien, og derefter udl\u00f8ser Type 2 SPD for at begr\u00e6nse restsp\u00e6ndingen til et lavere niveau. Hvis afstanden er utilstr\u00e6kkelig, kan en stor stigning omg\u00e5 Type 1 og beskadige Type 2.\r\n\r\n \r\n

Har jeg brug for Type 1 eller Type 2 SPD?<\/h2>\r\nDette er en beslutningsproces, der hj\u00e6lper dig med at tr\u00e6ffe et valg:\r\n

Har bygningen et eksternt oversp\u00e6ndingsbeskyttelsessystem?<\/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

Oversp\u00e6ndingsrisikovurdering ved indg\u00e5ende elledning<\/strong><\/h3>\r\nSelv uden et eksternt lynbeskyttelsessystem, hvis din bygning er placeret i et \u00e5bent omr\u00e5de, p\u00e5 en bakketop eller har lange luftledninger, er risikoen for lynnedslag h\u00f8j. Installation af en Type 1 SPD kan give et h\u00f8jere beskyttelsesniveau.\r\n

Beslut valget<\/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

Begrebet graderet (koordineret) beskyttelse<\/h2>\r\n

Hvorfor er graderet beskyttelse n\u00f8dvendig?<\/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

Typisk gradueret beskyttelsesordning<\/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

FAQ<\/h2>\r\nKan jeg installere b\u00e5de Type 1 og 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\nForskellen mellem type 1+2 kombineret spd og installation af dem separat<\/strong>\r\n
Type 1+2 kombineret SPD: En enkelt enhed integrerer b\u00e5de Type 1 og Type 2 moduler. Dens fordele omfatter pladsbesparelse og nem installation, hvilket g\u00f8r den s\u00e6rdeles velegnet til scenarier med begr\u00e6nset plads i hovedfordelingsboksen. Det har best\u00e5et koordinationstest for at sikre korrekt modulkompatibilitet.<\/div>\r\n
<\/div>\r\n
Separat installation: Tilbyder maksimal fleksibilitet og vedligeholdelse. Hvis et Type 1-modul er beskadiget, kan kun Type 1-modulet udskiftes uden at p\u00e5virke Type 2-modulet. Der skal dog sikres tilstr\u00e6kkelig afstand mellem dem, eller der skal anvendes en afkoblingsanordning.<\/div>\r\n
<\/div>\r\nJeg bruger oversp\u00e6ndingsstrimler p\u00e5 mine stikkontakter. Skal jeg installere 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 \r\n\r\nEnkeltfase SPD VS Trefaset Type 1 SPD<\/strong>\r\n\r\nEnfasede SPD'er bruges i enfasede str\u00f8mforsyningssystemer (en str\u00f8mf\u00f8rende ledning og en neutral ledning), mens trefasede type 1 SPD'er bruges i trefasede str\u00f8mforsyningssystemer (tre str\u00f8mf\u00f8rende ledninger og en neutral ledning eller tre str\u00f8mf\u00f8rende ledninger, en neutral ledning og en jordledning), designet til at beskytte alle faseledninger mod massive lynnedslag, s\u00e5som direkte lynnedslag.\r\n

Konklusion<\/h2>\r\n
SPD Type 1 Vs Type 2? At v\u00e6lge mellem Type 1 og Type 2 SPD'er er ikke et enten-eller sp\u00f8rgsm\u00e5l, men snarere et sp\u00f8rgsm\u00e5l om, hvordan man opbygger et effektivt lynbeskyttelseshierarki.<\/div>\r\n
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
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
Den sikreste og mest p\u00e5lidelige strategi er at f\u00f8lge et niveaudelt beskyttelsesprincip: anbring Type 1 ved hovedindgange, Type 2 ved distributionsbokse og oversp\u00e6ndingsstrimler ved endelige udstyrssteder. Gennem dette lagdelte beskyttelsessystem kan du give den mest omfattende beskyttelse af dit elektriske udstyr og din ejendom.<\/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 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 \r\n

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

2.1 Main function of Type 1 and Type 2 SPD<\/h2>\r\n\"BR-25M<\/a>\r\n
Type 1 SPD (Lightning Current Discharge Device):<\/strong><\/div>\r\n
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
Core Task: Handles and redirects large lightning currents to stop damage to equipment and lines downstream.<\/div>\r\n
<\/div>\r\n
Type 2 SPD (Pressure Control Device):<\/strong><\/div>\r\n
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
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>\r\n
<\/div>\r\n

2.2 Main Test Parameters<\/h2>\r\n
Type 1 SPD Single Phase:<\/strong><\/div>\r\n
Impulse Current (I<sub>imp<\/sub>): 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>\r\n
\"BR-20<\/a><\/div>\r\n
Type 2 SPD:<\/strong><\/div>\r\n
Nominal Discharge Current (I<sub>n<\/sub>): 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
Maximum Discharge Current (I<sub>max<\/sub>): Indicates the maximum discharge current (8\/20\u03bcs waveform) that the SPD can withstand in a single operation.<\/div>\r\n
<\/div>\r\n
<\/div>\r\n
<\/div>\r\n

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 \r\n

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 \r\n

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 \r\n

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 \r\n

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

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

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

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

Concept Of Graded (Coordinated) Protection<\/h2>\r\n

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

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

FAQ<\/h2>\r\nCan 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\nDifference Between Type 1+2 Combined Spd And Installing Them Separately<\/strong>\r\n
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>\r\n
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>\r\nI 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 \r\n\r\nSingle 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

Conclusion<\/h2>\r\n
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
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
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
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\/da\/wp-json\/wp\/v2\/blog\/2241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/media\/2246"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/media?parent=2241"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/da\/wp-json\/wp\/v2\/blog_category?post=2241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}