{"id":2805,"date":"2025-10-04T09:30:32","date_gmt":"2025-10-04T07:30:32","guid":{"rendered":"https:\/\/gezhi-tech.com\/?p=2805"},"modified":"2025-10-05T09:16:05","modified_gmt":"2025-10-05T07:16:05","slug":"clause-3-how-to-understand-the-definition-of-all-pole-disconnection","status":"publish","type":"post","link":"https:\/\/gezhi-tech.com\/th\/clause-3-how-to-understand-the-definition-of-all-pole-disconnection\/","title":{"rendered":"Clause 3 \u2013 How to Understand the Definition of “all-pole disconnection”"},"content":{"rendered":"

all-pole disconnection<\/strong><\/a><\/strong>: disconnection of both supply conductors by a single initiating action or, for multi-phase appliances, disconnection of all supply conductors by a single initiating action
NOTE For multi-phase appliances, the neutral conductor is not considered to be a supply conductor.<\/p>\n\n\n\n

Single-phase power<\/strong>: An AC power system composed of one live wire and one neutral wire.
\u200bThree-phase power<\/strong>: An AC power system composed of three live wires, with the same frequency and a phase difference of 120 degrees between each.<\/p>\n\n\n\n

Single-phase power <\/strong>has two poles, which are the live wire\/pole and the neutral wire\/pole, generally, when we refer to multi-phase power, it is typically Three-phase power. Three-phase power has two type of connection such ass Star connection (Y connection) and Delta connection (\u0394 connection).<\/p>\n\n\n\n

Star connection (Y connection)<\/strong>: In a Star connection (Y connection), one end of each of the three load supply leads<\/strong><\/a> is joined to form a common neutral point. The other ends are connected to the three live wires, respectively.
Delta connection (\u0394 connection)<\/strong>: The three load supply power leads are connected end-to-end, forming a closed loop, with the connection points respectively connected to the three live wires.
The supply conductors mentioned in the standard refer to the live wire and neutral wire in single-phase power, as well as all conductors in three-phase power except the neutral wire in a star connection. Each conductor is defined as a pole or supply conductor.<\/p>\n\n\n\n

A disconnection is considered all-pole disconnection if a single action simultaneously disconnects both the live and neutral wires in a single-phase power system, or all supply conductors in a three-phase power system.
The purpose of defining all-pole disconnection is to provide protection against electric shock<\/strong>. In single-phase systems, both neutral and live conductors are considered live parts. Similarly, in three-phase systems, all live conductors are considered live parts. As shown in the below pictures, it shows the three-phase power system and single-phase power system appliance, the temperature limiter<\/strong><\/a> shown in pictures is an all-pole disconnection.<\/p>\n\n\n\n

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Electric tankless water heater electrical diagram<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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3 phase Electric tankless water heater electrical diagram<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

Below pictures show a thermal cut-out\/ thermostat<\/strong><\/a>, you can find the all-pole disconnection diagram in its rating label.<\/p>\n\n\n\n

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Immersion Thermostat & safety thermal cut-out in plumbing&heating water container<\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

The bipolar thermal cut-out used in the kettle is shown in the figure below.<\/p>\n\n\n\n

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Dual Pole Thermal cut-out for Water boiler<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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Electric Water Dry Burn Overheat Protector, Bipolar Disconnection<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

The diagram below shows a three-pole thermal overload relay, which is an example of an all-pole disconnection device.<\/p>\n\n\n\n

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Thermal Overload Relay Working Principle Diagram<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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3-poles thermal overload relay<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

The wire connection diagram and the picture of thermal protective devices used in water heaters with container are shown in pictures below:<\/p>\n\n\n\n

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thermostat with temperature Adjustable one pole and 2-pole disconnection hand reset-1<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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thermostat with temperature Adjustable one pole and 2-pole disconnection hand reset<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n
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thermostat with temperature Adjustable one pole and 2-pole disconnection hand reset diagram<\/figcaption><\/figure>\n\n\n\n

thermostat with temperature Adjustable one pole and 2-pole disconnection hand reset diagram.<\/p>","protected":false},"excerpt":{"rendered":"

all-pole disconnection<\/strong><\/a>: disconnection of both supply conductors by a single initiating action or, for multi-phase appliances, disconnection of all supply conductors by a single initiating actionNOTE For multi-phase appliances, the neutral conductor is not considered to be a supply conductor. Single-phase power: An AC power system composed of one live wire and one neutral wire.\u200bThree-phase…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[5],"tags":[122,118,147,119,117,116,114],"class_list":["post-2805","post","type-post","status-publish","format-standard","hentry","category-terms-and-definitions","tag-disconnection-of-both-supply-conductors-by-a-single-initiating-action-or-for-multi-phase-appliances-disconnection-of-all-supply-conductors-by-a-single-initiating-action","tag-thermal-cut-out-that-requires-a-manual-operation-for-resetting-or-replacement-of-a-part-in-order-to-restore-the-current","tag-protection-against-electric-shock","tag-device-the-operation-of-which-prevents-a-hazardous-situation-under-abnormal-operation-conditions","tag-thermal-cut-out-that-automatically-restores-the-current-after-the-relevant-part-of-the-appliance-has-cooled-down-sufficiently","tag-device-which-during-abnormal-operation-limits-the-temperature-of-the-controlled-part-by-automatically-opening-the-circuit-or-by-reducing-the-current-and-is-constructed-so-that-its-setting-cannot-be","tag-temperature-sensing-device-the-operating-temperature-of-which-may-be-either-fixed-or-adjustable-and-which-during-normal-operation-keeps-the-temperature-of-the-controlled-part-between-certain-limits-b"],"translation":{"provider":"WPGlobus","version":"3.0.1","language":"th","enabled_languages":["en","es","ar","de","ja","fr","ru","th","nl","it","fa","ko","pt","hi","ro","tr","vi","id","zu"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"es":{"title":false,"content":false,"excerpt":false},"ar":{"title":false,"content":false,"excerpt":false},"de":{"title":false,"content":false,"excerpt":false},"ja":{"title":false,"content":false,"excerpt":false},"fr":{"title":false,"content":false,"excerpt":false},"ru":{"title":false,"content":false,"excerpt":false},"th":{"title":false,"content":false,"excerpt":false},"nl":{"title":false,"content":false,"excerpt":false},"it":{"title":false,"content":false,"excerpt":false},"fa":{"title":false,"content":false,"excerpt":false},"ko":{"title":false,"content":false,"excerpt":false},"pt":{"title":false,"content":false,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false},"ro":{"title":false,"content":false,"excerpt":false},"tr":{"title":false,"content":false,"excerpt":false},"vi":{"title":false,"content":false,"excerpt":false},"id":{"title":false,"content":false,"excerpt":false},"zu":{"title":false,"content":false,"excerpt":false}}},"_links":{"self":[{"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/posts\/2805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/comments?post=2805"}],"version-history":[{"count":2,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/posts\/2805\/revisions"}],"predecessor-version":[{"id":2841,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/posts\/2805\/revisions\/2841"}],"wp:attachment":[{"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/media?parent=2805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/categories?post=2805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gezhi-tech.com\/th\/wp-json\/wp\/v2\/tags?post=2805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}