{"id":32336,"date":"2023-11-06T12:52:17","date_gmt":"2023-11-06T10:52:17","guid":{"rendered":"https:\/\/ardetem-sfere.com\/?post_type=product&#038;p=32336"},"modified":"2026-09-10T14:57:58","modified_gmt":"2026-09-10T12:57:58","slug":"differential-relays-type-a-elrv20-30-sfere","status":"publish","type":"product","link":"https:\/\/ardetem-sfere.com\/en\/produit\/differential-relays-type-a-elrv20-30-sfere\/","title":{"rendered":"ELRv20-30 SFERE > Differential Relays TYPE A"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"<p><strong>ELRv20-30 SFERE Differential Relays are type A earth leakage current limiting relays.<\/strong><\/p>\n<p>Combined with a measuring toroid and a circuit breaker, they can be used on low-voltage TT, IT and TNS networks to perform the following functions:<\/p>\n<ul>\n<li><strong>Protection against direct contact<\/strong><br \/>\n<strong><\/strong><\/li>\n<li><strong>Additional protection against indirect contacts<\/strong><br \/>\n<strong><\/strong><\/li>\n<li><strong>Limitation of leakage current<\/strong><br \/>\n<strong><\/strong><\/li>\n<li><strong>Protection against fire<\/strong><\/li>\n<\/ul>\n<p>Their enhanced immunity and True RMS measurement technique guarantee maximum safety and continuity of electrical operation, avoiding untimely disconnections. What&#8217;s more, they have a pre-alarm output so that insulation faults can be anticipated without tripping.<\/p>\n<p>The ELRv30 and ELRv31 have an automatic reclosing function to maintain the continuity of service required in certain sensitive or isolated installations.<\/p>\n<p><span style=\"text-decoration: underline;\"><em><strong>Features &amp; Benefits<\/strong><\/em><\/span><\/p>\n<ul>\n<li>LCD display<\/li>\n<li>Programmable sensitivity<\/li>\n<li>2 relay outputs: main alarm + reclosing or pre-alarm end-of-cycle contact<\/li>\n<li>Alarm test and reset via keypad or external command<\/li>\n<li>Connection test with toroid<\/li>\n<li>Auto reset function<\/li>\n<\/ul>\n<p><strong><u><em>TECHNICAL SPECIFICATIONS<\/em><br \/>\n<\/u><\/strong><\/p>\n<ul>\n<li><strong><\/strong>Timer setting<\/li>\n<li>Trigger setting<\/li>\n<li>Sensitivity setting (I\u2206n) : 0.030 &#8211; 0.1 &#8211; 0.2 &#8211; 0.3 &#8211; 0.5 &#8211; 1 &#8211; 2 &#8211; 3A<\/li>\n<li>Hysteresis setting<\/li>\n<li>Alarm outputs: 1 RT contact per alarm, 8A\/250Vac on resistive load<\/li>\n<li>External control<\/li>\n<li>Operating temperature : -5 to +55\u00b0C<\/li>\n<li>Protection rating: IP20<\/li>\n<li>Insulation: 2kV-50Hz-1min (between power supply and outputs)<\/li>\n<li>Snap-in cabinet mounting on symmetrical DIN rail<\/li>\n<li>Universal auxiliary power supply: 20 to 250Vac and 20 to 250Vdc<\/li>\n<\/ul>\n<p><strong><em><u>Options<\/u><\/em><\/strong><\/p>\n<ul>\n<li>Digital output RS485 Modbus\/Jbus protocol<\/li>\n<\/ul>\n<p><span style=\"text-decoration: underline;\"><em><strong>Regulatory Compliance<\/strong><\/em><\/span><\/p>\n<ul>\n<li>IEC 610008-1<\/li>\n<li>IEC 60755<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"http:\/\/ardetem-sfere.com\/wp-content\/uploads\/2021\/08\/ce.jpg\" alt=\"\" width=\"68\" height=\"68\" class=\"alignnone size-full wp-image-9696\" style=\"font-size: 1rem;\" srcset=\"https:\/\/ardetem-sfere.com\/wp-content\/uploads\/2021\/08\/ce.jpg 68w, https:\/\/ardetem-sfere.com\/wp-content\/uploads\/2021\/08\/ce-64x64.jpg 64w\" sizes=\"(max-width: 68px) 100vw, 68px\" \/><\/p>\n<p><strong><a href=\"https:\/\/ardetem-sfere.com\/download\/32342\" target=\"_blank\" rel=\"noopener\">DATASHEET (pdf) <img decoding=\"async\" src=\"http:\/\/ardetem-sfere.com\/wp-content\/uploads\/2022\/01\/logo-pdf.jpg\" alt=\"\" width=\"24\" height=\"24\" class=\"alignnone size-full wp-image-9976\" \/><\/a> | <a href=\"https:\/\/ardetem-sfere.com\/download\/32344\" target=\"_blank\" rel=\"noopener\">MANUAL (pdf) <img decoding=\"async\" src=\"http:\/\/ardetem-sfere.com\/wp-content\/uploads\/2022\/01\/logo-pdf.jpg\" alt=\"\" width=\"24\" height=\"24\" class=\"alignnone size-full wp-image-9976\" \/> <\/a>|<\/strong><\/p>\n","protected":false},"featured_media":39837,"template":"","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":""},"product_brand":[647],"product_cat":[96],"product_tag":[],"class_list":["post-32336","product","type-product","status-publish","has-post-thumbnail","product_brand-sfere","product_cat-differential-relays","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/product\/32336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/media\/39837"}],"wp:attachment":[{"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/media?parent=32336"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/product_brand?post=32336"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/product_cat?post=32336"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ardetem-sfere.com\/en\/wp-json\/wp\/v2\/product_tag?post=32336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}