{"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\/sv\/blog\/type-1-surge-protection-device-vs-type-2-spd\/","title":{"rendered":"Typ 1 \u00f6versp\u00e4nningsskydd VS Typ 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 \u00d6versp\u00e4nningsskydd typ 1<\/strong><\/a> och SPD:er av typ 2 f\u00f6r att hj\u00e4lpa dig f\u00f6rst\u00e5 deras skillnader, till\u00e4mpningsscenarier och g\u00f6ra r\u00e4tt val.\r\n\r\n \r\n

2. Typ 1 \u00f6versp\u00e4nningsskydd kontra typ 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 Huvudfunktion f\u00f6r typ 1 och typ 2 SPD<\/h2>\r\n\"BR-25M<\/a>\r\n
Typ 1 SPD (Lightning Current Discharge Device):<\/strong><\/div>\r\n
Huvudfunktion: Ger skydd mot direkta blixtnedslag eller partiella blixtstr\u00f6mmar. Vanligtvis placerad vid huvuding\u00e5ngen till en byggnad, ger den f\u00f6rsta niv\u00e5n (grundl\u00e4ggande) skydd.<\/div>\r\n
K\u00e4rnuppgift: Hanterar och omdirigerar stora blixtstr\u00f6mmar f\u00f6r att stoppa skador p\u00e5 utrustning och ledningar nedstr\u00f6ms.<\/div>\r\n
<\/div>\r\n
Typ 2 SPD (tryckkontrollanordning):<\/strong><\/div>\r\n
Huvudfunktion: Anv\u00e4nds f\u00f6r skydd mot \u00f6versp\u00e4nningar fr\u00e5n omkopplardrift och kvarvarande \u00f6versp\u00e4nningar fr\u00e5n inducerade blixtnedslag. Den \u00e4r vanligtvis installerad i distributionsl\u00e5dor (som golvf\u00f6rdelningsl\u00e5dor) och ger andra niv\u00e5n (mellanliggande skydd).<\/div>\r\n
K\u00e4rnuppgift: Begr\u00e4nsar restsp\u00e4nningen till en s\u00e4ker niv\u00e5 f\u00f6r terminalutrustning, vilket fungerar som det prim\u00e4ra skyddet f\u00f6r k\u00e4nslig elektronisk utrustning.<\/div>\r\n
<\/div>\r\n
<\/div>\r\n

2.2 Huvudtestparametrar<\/h2>\r\n
Typ 1 SPD enfas:<\/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
Typ 2 SPD:<\/strong><\/div>\r\n
Nominell urladdningsstr\u00f6m (In<\/sub>): K\u00e4rnparametern. Den indikerar standardteststr\u00f6mmen (8\/20 \u03bcs v\u00e5gform) som SPD kan motst\u00e5 flera g\u00e5nger. Till exempel: 20 kA (8\/20\u03bcs).<\/div>\r\n
Maximal urladdningsstr\u00f6m (Imax<\/sub>): Indikerar den maximala urladdningsstr\u00f6mmen (8\/20\u03bcs v\u00e5gform) som SPD kan motst\u00e5 i en enda operation.<\/div>\r\n
<\/div>\r\n
<\/div>\r\n
<\/div>\r\n

2.3 Testa v\u00e5gformer<\/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 Installationsplats<\/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 av externt \u00f6versp\u00e4nningsskyddssystem<\/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 Samordning<\/h2>\r\nSPD:er av typ 1 och typ 2 m\u00e5ste fungera tillsammans. Ett visst linjeavst\u00e5nd m\u00e5ste uppr\u00e4tth\u00e5llas mellan dem (vanligtvis rekommenderas att vara minst 10 meter), eller s\u00e5 b\u00f6r fr\u00e5nkopplingsanordningar (s\u00e5som dedikerade reaktorer) anv\u00e4ndas f\u00f6r att s\u00e4kerst\u00e4lla att, i h\u00e4ndelse av \u00f6versp\u00e4nning, l\u00f6ser typ 1 SPD f\u00f6rst f\u00f6r att avleda det mesta av energin, och sedan l\u00f6ser typ 2 SPD ut f\u00f6r att begr\u00e4nsa restsp\u00e4nningen till en l\u00e4gre niv\u00e5. Om avst\u00e5ndet \u00e4r otillr\u00e4ckligt kan en stor v\u00e5g f\u00f6rbig\u00e5 typ 1 och skada typ 2.\r\n\r\n \r\n

Beh\u00f6ver jag SPD typ 1 eller typ 2?<\/h2>\r\nDet h\u00e4r \u00e4r en beslutsprocess som hj\u00e4lper dig att g\u00f6ra ett val:\r\n

Har byggnaden ett externt \u00f6versp\u00e4nningsskydd?<\/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

\u00d6versp\u00e4nningsriskbed\u00f6mning vid inkommande kraftledning<\/strong><\/h3>\r\n\u00c4ven utan ett externt \u00e5skskyddssystem, om din byggnad ligger i ett \u00f6ppet omr\u00e5de, p\u00e5 en kulle eller har l\u00e5nga kraftledningar, \u00e4r risken f\u00f6r blixtnedslag stor. Att installera en SPD av typ 1 kan ge en h\u00f6gre skyddsniv\u00e5.\r\n

Besluta urval<\/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

Begreppet Graderat (koordinerat) skydd<\/h2>\r\n

Varf\u00f6r \u00e4r graderat skydd n\u00f6dv\u00e4ndigt?<\/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

Typiskt 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\nKan jag installera b\u00e5de typ 1 och typ 2 enfas 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\nSkillnaden mellan typ 1+2 kombinerad spd och att installera dem separat<\/strong>\r\n
Typ 1+2 kombinerad SPD: En enda enhet integrerar b\u00e5de typ 1- och typ 2-moduler. Dess f\u00f6rdelar inkluderar utrymmesbesparing och enkel installation, vilket g\u00f6r den s\u00e4rskilt l\u00e4mplig f\u00f6r scenarier med begr\u00e4nsat utrymme i huvudf\u00f6rdelningsboxen. Den har klarat koordinationstestning f\u00f6r att s\u00e4kerst\u00e4lla korrekt modulkompatibilitet.<\/div>\r\n
<\/div>\r\n
Separat installation: Ger maximal flexibilitet och underh\u00e5llsbarhet. Om en typ 1-modul \u00e4r skadad kan endast typ 1-modulen bytas ut utan att det p\u00e5verkar typ 2-modulen. Tillr\u00e4ckligt avst\u00e5nd m\u00e5ste dock s\u00e4kerst\u00e4llas mellan dem, eller s\u00e5 m\u00e5ste en fr\u00e5nkopplingsanordning anv\u00e4ndas.<\/div>\r\n
<\/div>\r\nJag anv\u00e4nder \u00f6versp\u00e4nningsremsor p\u00e5 mina uttag. Beh\u00f6ver jag installera typ 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\nEnfas SPD VS trefas typ 1 SPD<\/strong>\r\n\r\nEnfas SPD:er anv\u00e4nds i enfas str\u00f6mf\u00f6rs\u00f6rjningssystem (en sp\u00e4nningsf\u00f6rande ledning och en neutral ledning), medan trefas typ 1 SPD:er anv\u00e4nds i trefasiga str\u00f6mf\u00f6rs\u00f6rjningssystem (tre str\u00f6mf\u00f6rande ledningar och en neutral ledning eller tre str\u00f6mf\u00f6rande ledningar, en neutral ledning och en jordledning), utformade f\u00f6r att skydda alla fasledningar fr\u00e5n massiva blixtnedslag s\u00e5som direkta blixtnedslag.\r\n

Slutsats<\/h2>\r\n
SPD typ 1 vs typ 2? Att v\u00e4lja mellan typ 1 och typ 2 SPD \u00e4r inte en antingen-eller fr\u00e5ga, utan snarare en fr\u00e5ga om hur man bygger en effektiv blixtskyddshierarki.<\/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 s\u00e4kraste och mest tillf\u00f6rlitliga strategin \u00e4r att f\u00f6lja en skiktad skyddsprincip: installera typ 1 vid huvudentr\u00e9er, typ 2 vid distributionsl\u00e5dor och \u00f6versp\u00e4nningsremsor vid slutliga utrustningsplatser. Genom detta skiktade skyddssystem kan du ge det mest omfattande skyddet f\u00f6r din elektriska utrustning och egendom.<\/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\/sv\/wp-json\/wp\/v2\/blog\/2241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/media\/2246"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/media?parent=2241"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/sv\/wp-json\/wp\/v2\/blog_category?post=2241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}