{"id":883,"date":"2023-07-26T15:56:26","date_gmt":"2023-07-26T07:56:26","guid":{"rendered":"https:\/\/www.britecelectric.com\/?post_type=blog&p=883"},"modified":"2024-09-05T16:41:56","modified_gmt":"2024-09-05T08:41:56","slug":"surge-protection-device-overview","status":"publish","type":"blog","link":"https:\/\/www.britecelectric.com\/it\/blog\/surge-protection-device-overview\/","title":{"rendered":"Panoramica del dispositivo di protezione contro le sovratensioni"},"content":{"rendered":"Rischi di sovratensioni elettriche<\/strong>\r\n\r\nLightning discharges could contain currents of 200,000A which if struck at or near power transmission lines would generate a significant voltage transient. This voltage transient could cause significant damage to both domestic and commercial electronic equipment.\r\n\r\nThese transients can cause damage ranging from the premature ageing of equipment, logic failures and down time, to the complete destruction of equipment within the entire electrical installation. Products such as LCD screens, data servers and industrial equipment such PLC\u2019s are critical to business activity. Protecting this equipment may now be a necessity.\r\n\r\nSurge protective devices (SPD) assist in the protection of valuable electrical and electronic equipment against transients, originating from lightning and also from switching sources.\r\n\r\nBRITEC SPD range of solutions may offer protection to prevent damage to this sensitive equipment by diverting the damaging transient over-voltages. In the majority of cases this will eliminate equipment failures and reduce downtime.\r\n\r\nTerminologia e criteri di selezione<\/strong>\r\n\r\nSurge protection devices are classified according to their standard into different types:\r\n\r\n\u2022 Type 1 \u2013 SPD which can discharge partial lightning current with a typical waveform 10\/350 \u03bcs. Usually employs spark gap technology.\r\n\r\n\u2022 Type 2 \u2013 SPD which can prevent the spread of overvoltage in the electrical installations and protects equipment connected to it. It usually employs metal oxide varistor (MOV) technology and is characterized by an 8\/20 \u03bcs current wave.\r\n\r\n\u2022 Type 3 \u2013 These SPDs have a low discharge capacity. They must therefore only be installed as a supplement to Type 2 SPD and in the vicinity of sensitive loads. Type 3 SPD\u2019s are characterized by a combination of voltage waves (1.2\/50 \u03bcs) and current waves (8\/20 \u03bcs).\r\n\r\nIimp \u2013 Impulse current of 10\/350 \u03bcs waveform associated with Type 1 SPD.\r\n\r\nIn \u2013 Surge current of 8\/20 \u03bcs waveform associated with Type 2 SPD.\r\n\r\nUp \u2013 The residual voltage that is measured across the terminal of the SPD when In is applied.\r\n\r\nUc \u2013 The maximum voltage which may be continuously applied to the SPD without it conducting.\r\n\r\nSelezione dei dispositivi adatti<\/strong>\r\n\r\nType 1 SPD is often referred to as equipotential bonding SPD\u2019s and are fitted at the origin. A lightning protection system employing these devices only, offer no effective protection against failure of sensitive electrical and electronic systems. In order to achieve this, additional coordinated devices will have to be employed.\r\n\r\nA Type 1 SPD is used at the origin of the installation, a Type 2 SPD is used at distribution boards and a Type 3 SPD is used near terminal equipment.\r\n\r\nSurge protection needs to be selected such that their voltage protection level (Up) is lower than the impulse withstand capability of the equipment to be protected. This for a 230\/400V installation suggests that the value should not exceed 2.5kV.\r\n\r\nConnessione<\/strong>\r\n\r\nTo gain maximum protection from the SPD, the connecting conductors should be kept as short as possible. This is to minimize any additive voltage drops on the connecting cables.\r\n\r\nThe connecting conductors of the SPD shall have a cross sectional area of not less than 4mm2 copper and the total connecting lead length (a+b) should preferably not exceed 0.5m but shall in no case exceed 1m.\r\n\r\nShould the distance between the SPD and the sensitive equipment to be protected be greater than 10m, oscillations could lead to higher voltage values appearing at the equipment. Consideration should be given to additional coordinated surge protection devices closer to the equipment.\r\n\r\nProtection against SPD short circuits is often provided by an over-current protective device such as a fuse or circuit breaker. This device must of course permit the flow of surge current through the device without operating.\r\n\r\nIspezione e test<\/strong>\r\n\r\nDuring the Initial Verification or as part of a periodic inspection & test, the SPD should be inspected to ensure it is operational.\r\n\r\nThere is usually some kind of visual indication on the SPD that the device is still operational. This may be indicated by a GREEN visual indicator window. Should this window indicate RED then it is an indication that the device has reached its \u2018End of Life\u2019 and needs replacing. With some products, this will involve the replacement of the device, but on many of the products in the range, this can simply be carried out by replacing the removable cartridge.\r\n\r\nGuida rapida alla selezione SPD<\/strong>\r\n\r\nThe following is a quick selection guide which may assist in choosing whether SPD\u2019s are required and the correct type of device\r\n\r\n\u2022 Does the installation contain a lightning protection system?\r\n\r\n\u2022 Is the installation adjacent to any tall structure, tall trees or near a hill top in a lightning prone area?\r\n\r\n\u2022 Does the installation contain equipment where higher reliability from overvoltage is required.\r\n\r\nIf the answer is YES in the above to the first two questions, it is recommended to install a Type 1+2 device. This will provide protection against surges caused by direct lightning strikes and provide protection against transient over-voltages caused by indirect lightning strikes or by switching events.\r\n\r\nIf the answer is YES to the third question then it is recommended to install Type 2 devices to provide protection against transient over-voltages caused by indirect lightning strikes or by switching events.\r\n\r\nVantaggi dell\u2019utilizzo degli SPD BRITEC<\/strong>\r\n\r\nProduct configuration:\r\n\r\n\u2022 Thermal and dynamic disconnection\r\n\r\n\u2022 Increases equipment life (by providing clean power)\r\n\r\n\u2022 DIN mounted devices\r\n\r\n\u2022 Removable tabs on replaceable cartridges to give the contractor the option of allowing the consumer to replace the cartridge\r\n\r\n\u2022 IP20\r\n\r\n\u2022 Does not disconnect your installation from supply when experiencing a transient over-voltage\r\n\r\n\u2022 Conforms to EN61643-11\uff0cEN61643-31\uff0cEN61643-21","protected":false},"featured_media":884,"parent":0,"menu_order":136,"template":"","meta":{"_acf_changed":false},"blog_category":[8],"class_list":["post-883","blog","type-blog","status-publish","has-post-thumbnail","hentry","blog_category-company-news"],"acf":{"des":"Lightning discharges could contain currents of 200,000A which if struck at or near power transmission lines would generate a significant voltage transient. This voltage transient could cause significant damage to both domestic and commercial electronic equipment.","txt":"Risks of electrical surges<\/strong>\r\n\r\nLightning discharges could contain currents of 200,000A which if struck at or near power transmission lines would generate a significant voltage transient. This voltage transient could cause significant damage to both domestic and commercial electronic equipment.\r\n\r\nThese transients can cause damage ranging from the premature ageing of equipment, logic failures and down time, to the complete destruction of equipment within the entire electrical installation. Products such as LCD screens, data servers and industrial equipment such PLC\u2019s are critical to business activity. Protecting this equipment may now be a necessity.\r\n\r\nSurge protective devices (SPD) assist in the protection of valuable electrical and electronic equipment against transients, originating from lightning and also from switching sources.\r\n\r\nBRITEC SPD range of solutions may offer protection to prevent damage to this sensitive equipment by diverting the damaging transient over-voltages. In the majority of cases this will eliminate equipment failures and reduce downtime.\r\n\r\nTerminology & selection criteria<\/strong>\r\n\r\nSurge protection devices are classified according to their standard into different types:\r\n\r\n\u2022 Type 1 \u2013 SPD which can discharge partial lightning current with a typical waveform 10\/350 \u03bcs. Usually employs spark gap technology.\r\n\r\n\u2022 Type 2 \u2013 SPD which can prevent the spread of overvoltage in the electrical installations and protects equipment connected to it. It usually employs metal oxide varistor (MOV) technology and is characterized by an 8\/20 \u03bcs current wave.\r\n\r\n\u2022 Type 3 \u2013 These SPDs have a low discharge capacity. They must therefore only be installed as a supplement to Type 2 SPD and in the vicinity of sensitive loads. Type 3 SPD\u2019s are characterized by a combination of voltage waves (1.2\/50 \u03bcs) and current waves (8\/20 \u03bcs).\r\n\r\nIimp \u2013 Impulse current of 10\/350 \u03bcs waveform associated with Type 1 SPD.\r\n\r\nIn \u2013 Surge current of 8\/20 \u03bcs waveform associated with Type 2 SPD.\r\n\r\nUp \u2013 The residual voltage that is measured across the terminal of the SPD when In is applied.\r\n\r\nUc \u2013 The maximum voltage which may be continuously applied to the SPD without it conducting.\r\n\r\nSelection of suitable devices<\/strong>\r\n\r\nType 1 SPD is often referred to as equipotential bonding SPD\u2019s and are fitted at the origin. A lightning protection system employing these devices only, offer no effective protection against failure of sensitive electrical and electronic systems. In order to achieve this, additional coordinated devices will have to be employed.\r\n\r\nA Type 1 SPD is used at the origin of the installation, a Type 2 SPD is used at distribution boards and a Type 3 SPD is used near terminal equipment.\r\n\r\nSurge protection needs to be selected such that their voltage protection level (Up) is lower than the impulse withstand capability of the equipment to be protected. This for a 230\/400V installation suggests that the value should not exceed 2.5kV.\r\n\r\nConnection<\/strong>\r\n\r\nTo gain maximum protection from the SPD, the connecting conductors should be kept as short as possible. This is to minimize any additive voltage drops on the connecting cables.\r\n\r\nThe connecting conductors of the SPD shall have a cross sectional area of not less than 4mm2 copper and the total connecting lead length (a+b) should preferably not exceed 0.5m but shall in no case exceed 1m.\r\n\r\nShould the distance between the SPD and the sensitive equipment to be protected be greater than 10m, oscillations could lead to higher voltage values appearing at the equipment. Consideration should be given to additional coordinated surge protection devices closer to the equipment.\r\n\r\nProtection against SPD short circuits is often provided by an over-current protective device such as a fuse or circuit breaker. This device must of course permit the flow of surge current through the device without operating.\r\n\r\nInspection & Testing<\/strong>\r\n\r\nDuring the Initial Verification or as part of a periodic inspection & test, the SPD should be inspected to ensure it is operational.\r\n\r\nThere is usually some kind of visual indication on the SPD that the device is still operational. This may be indicated by a GREEN visual indicator window. Should this window indicate RED then it is an indication that the device has reached its \u2018End of Life\u2019 and needs replacing. With some products, this will involve the replacement of the device, but on many of the products in the range, this can simply be carried out by replacing the removable cartridge.\r\n\r\nSPD quick selection guide<\/strong>\r\n\r\nThe following is a quick selection guide which may assist in choosing whether SPD\u2019s are required and the correct type of device\r\n\r\n\u2022 Does the installation contain a lightning protection system?\r\n\r\n\u2022 Is the installation adjacent to any tall structure, tall trees or near a hill top in a lightning prone area?\r\n\r\n\u2022 Does the installation contain equipment where higher reliability from overvoltage is required.\r\n\r\nIf the answer is YES in the above to the first two questions, it is recommended to install a Type 1+2 device. This will provide protection against surges caused by direct lightning strikes and provide protection against transient over-voltages caused by indirect lightning strikes or by switching events.\r\n\r\nIf the answer is YES to the third question then it is recommended to install Type 2 devices to provide protection against transient over-voltages caused by indirect lightning strikes or by switching events.\r\n\r\nBenefits of using BRITEC SPD\u2019s<\/strong>\r\n\r\nProduct configuration:\r\n\r\n\u2022 Thermal and dynamic disconnection\r\n\r\n\u2022 Increases equipment life (by providing clean power)\r\n\r\n\u2022 DIN mounted devices\r\n\r\n\u2022 Removable tabs on replaceable cartridges to give the contractor the option of allowing the consumer to replace the cartridge\r\n\r\n\u2022 IP20\r\n\r\n\u2022 Does not disconnect your installation from supply when experiencing a transient over-voltage\r\n\r\n\u2022 Conforms to EN61643-11\uff0cEN61643-31\uff0cEN61643-21"},"_links":{"self":[{"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/blog\/883","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/blog"}],"about":[{"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/types\/blog"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/media\/884"}],"wp:attachment":[{"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/media?parent=883"}],"wp:term":[{"taxonomy":"blog_category","embeddable":true,"href":"https:\/\/www.britecelectric.com\/it\/wp-json\/wp\/v2\/blog_category?post=883"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}