{"id":4483,"date":"2026-03-13T13:46:51","date_gmt":"2026-03-13T10:46:51","guid":{"rendered":"https:\/\/www.tkf.fi\/safety-capacitors\/"},"modified":"2026-10-28T10:37:53","modified_gmt":"2026-10-28T07:37:53","slug":"safety-capacitors","status":"publish","type":"page","link":"https:\/\/www.tkf.fi\/en\/safety-capacitors\/","title":{"rendered":"Safety capacitors"},"content":{"rendered":"\t\t
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Safety capacitors<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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A safety capacitor is a critical component in grid protection and measurement systems. Its function is to filter out the rapid voltage spikes and high-frequency disturbances arising during switching operations, as they could cause malfunctions in relays or damage measurement circuits. A safety capacitor ensures that the signal transmitted to the voltage and protective relays is stable, clean, and reliable, which is a prerequisite for safe and selective network protection.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Battery operation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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An inductive compensation bank consists of appropriate compensation stages, just like the more familiar detuned capacitor bank. Whereas the main component in a detuned capacity bank is a capacitor, the inductive compensation bank has a specially manufactured coil or reactor. A suitable combination of small (5 kvar), medium (10 kvar), and large (15 kvar) inductive compensation stages is selected for the inductive compensation bank. The compensation stages are controlled by a regulator that switches them on or off as needed at any given moment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Typical inductive compensation banks\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– TKF-I30\/ 5+10+15 \/400-50-189
– TKF-I40\/5+2\u00d710+15\/400-50-189
– TKF-I60\/5+10+3\u00d715\/400-50-189
– TKF-I75\/ 5+10+4\u00d715 \/400-50-189<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Features<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– 400 V, 50 Hz
– 6-step control
– Cabinet dimensions: 800 x 600 x 2000 (L x W x H)
– Filter fan
– Enclosure rating IP30
– Indoor installation, 0\u201335\u00b0C<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Options<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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– Voltage level other than 400 V, such as 690 V
– Outdoor installation: IP43, -25\u00b0C \u2013 (+35\u00b0C)
– Cable routing from the bottom or the side
– Slave battery without a controller<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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TKF's solutions are used at thousands of sites, ranging from office buildings to industrial facilities<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Needs range from standard reactive power compensation to demanding applications that are critical to society. Hospitals (such as Tampere University Hospital and Satakunta Central Hospital in Finland), the Finnish Defence Forces, infrastructure projects (Helsinki Airport and the Helsinki metro), industry, real estate companies (VVO, Senate Properties), and electrical installations.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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\n\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t\t\t\n\t\t\t\t<\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\tContact us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Safety capacitors A safety capacitor is a critical component in grid protection and measurement systems. Its function is to filter […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-4483","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/pages\/4483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/comments?post=4483"}],"version-history":[{"count":5,"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/pages\/4483\/revisions"}],"predecessor-version":[{"id":4813,"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/pages\/4483\/revisions\/4813"}],"wp:attachment":[{"href":"https:\/\/www.tkf.fi\/en\/wp-json\/wp\/v2\/media?parent=4483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}