{"id":638,"date":"2021-06-17T20:52:16","date_gmt":"2021-06-17T20:52:16","guid":{"rendered":"https:\/\/highenergydevices.com\/?page_id=638"},"modified":"2023-02-22T12:02:46","modified_gmt":"2023-02-22T12:02:46","slug":"glossary-of-common-spark-gap-terms","status":"publish","type":"page","link":"https:\/\/highenergydevices.com\/glossary-of-common-spark-gap-terms\/","title":{"rendered":"Glossary of Common Spark Gap Terms"},"content":{"rendered":"\t\t
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Glossary of Common Spark Gap Terms<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Arc Voltage:<\/span>
<\/b>The arc is a self-sustained discharge that has a low voltage drop (typically 20-40 volts) and is capable of supporting currents of thousands of amperes. In a spark gap, the arc is established by transition from the dc breakdown or glow voltage to the arc mode. When an arc occurs in a spark gap between two refractory electrodes such as Tungsten, very high temperatures are created at the surface of the electrodes and rapid vaporization (erosion) of the electrode occurs.<\/span><\/p>

Capacitance (C):<\/b><\/span>
The electrical characteristic which permits the storage of electrical energy in the electrostatic field between two conductors. The amount of charge that can be stored by a capacitor is measured in farads.<\/p>

Cutoff Voltage:<\/span>
<\/b>The voltage level below which the application of a trigger pulse fails to achieve gap breakdown. The normally recommended range of operation of the applied voltage of a triggered spark gap is between 50 – 80% of the main static breakdown (MSB).\u00a0 Operation at lower applied voltages may be obtained; however the probability of a misfire increases at lower voltage levels.<\/p>

DC Breakdown Voltage:<\/b><\/span>
Voltage at which the spark discharge occurs when the voltage across the gap is increased slowly. A ramp rate is usually specified with a typical value of 1000 volts per second.<\/p>

Electromagnetic Pulse (EMP):<\/b><\/span>
A short duration pulse of electromagnetic energy from an unspecified source. This event is primarily associated with a nuclear explosion.<\/p>

Follow-On Current:<\/b><\/span>
The follow-on current may occur in either a DC or AC circuit.\u00a0 In an AC Circuit, after occurrence of a transient voltage at the end of each half cycle, there is a period in which the current is nearly zero. In this period, there is a very rapid deionization and the current will extinguish. As the voltage reverses, if the current continues to flow it is known as follow-on current.\u00a0 In DC applications, it is essential to insure that the protector will be extinguished after the transient has passed in order to be able to protect against reoccurring transients.<\/p>

Insulation Resistance (IR): <\/b><\/span>
The resistance between the electrodes of a spark gap which is not ionized. The measurement is commonly made at 100 Volts.<\/p>

Nuclear Electromagnetic Pulse (NEMP):<\/b><\/span>
The electromagnetic pulse originated from the explosion of a nuclear bomb.<\/p>

Peak Discharge Energy: <\/b><\/span>
The maximum stored energy that a gap can dissipate per firing, during intermittent duty, without permanently changing its breakdown rating by more than 10%. The principal effect of excessive peak energy is electrode erosion and glass rupture.<\/p>

Pulse Breakdown Voltage: <\/b><\/span>
Voltage at which the surge arrester ionizes when subjected to a fast rising voltage such as (dv\/dt = 10kV\/\u00b5s).<\/p>

Rise-time (tr): <\/b><\/span>
The time required for the initial edge of a voltage or current waveform to go from 10% to 90% of the peak value.<\/p>

Transient: <\/b><\/span>
A sudden change or pulse that is not intended in a circuit.<\/p>

Transition Time: <\/b><\/span>
The time interval between the instant when the spark gap breaks down and the establishment of the arc voltage.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Glossary of Common Spark Gap Terms Arc Voltage:The arc is a self-sustained discharge that has a low voltage drop (typically 20-40 volts) and is capable of supporting currents of thousands of amperes. In a spark gap, the arc is established by transition from the dc breakdown or glow voltage to the arc mode. When an […]<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ocean_post_layout":"full-width","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"on","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"off","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","footnotes":""},"yoast_head":"\nGlossary of Common Spark Gap Terms - High Energy Devices<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/highenergydevices.com\/glossary-of-common-spark-gap-terms\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Glossary of Common Spark Gap Terms - High Energy Devices\" \/>\n<meta property=\"og:description\" content=\"Glossary of Common Spark Gap Terms Arc Voltage:The arc is a self-sustained discharge that has a low voltage drop (typically 20-40 volts) and is capable of supporting currents of thousands of amperes. 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