Yadagani Balakrishna's Communities Activitieshttps://communities.bentley.com/members/0f752041_2d00_4c32_2d00_45c6_2d00_9cc0_2d00_dba3a8840778Recent activity for people in Yadagani Balakrishna's communityen-USTelligent Community 12Changes for the 18th Edition - Disconnection times for distribution circuits in a TN systemhttps://communities.bentley.com/products/building/performance/f/hevacomp-forum/175776/changes-for-the-18th-edition---disconnection-times-for-distribution-circuits-in-a-tn-systemWed, 27 Feb 2019 11:38:08 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:c88fbb9c-d6cd-4b65-98e9-4b66a367112cYadagani Balakrishna<p>Hi,</p> <p>With reference to the post in &nbsp;&quot;<a href="/products/building/performance/w/building_performance__wiki/40223/changes-for-the-18th-edition">Changes for the 18th Edition</a>&quot;, what is the reason for considering 1 Sec (see snap below) disconnection time for Other circutis in TN system.</p> <p>As per BS 7671:2018 Regulation 411.3.2.3 - In a TN system, a disconnection time not exceeding 5 s is permitted for a distribution circuit and for a circuit not covered by Regulation 411.3.2.2.</p> <p>So is this supposed to be 5 Sec&nbsp;as per the BS 7671?</p> <p><img src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/275871/pastedimage1551266921288v1.jpeg" alt=" " /></p><div style="clear:both;"></div>Ask A Question Ihttps://communities.bentley.com/achievements/460ac7df-7ccc-4c42-a204-9e05eef3be09Wed, 27 Feb 2019 01:08:08 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ef726961-9577-4388-a0f8-232594b3c7ffAsk a question in a forum.