{"id":827,"date":"2024-09-13T20:30:00","date_gmt":"2024-09-13T12:30:00","guid":{"rendered":"https:\/\/powerquality.sg\/wordpress\/?p=827"},"modified":"2024-09-20T19:57:46","modified_gmt":"2024-09-20T11:57:46","slug":"voltage-disturbance-13-9-2024-149pm","status":"publish","type":"post","link":"https:\/\/powerquality.sg\/wordpress\/?p=827","title":{"rendered":"Voltage Disturbance 13\/9\/2024 1:49PM"},"content":{"rendered":"\n

Earlier this afternoon, our portable PQ analyzers (monitoring at Low Voltage) at two different main incomers (in Loyang\/Changi) saw a significant drop in voltages. <\/p>\n\n\n\n

Technically, not a voltage dip here as the drop was less than 10% of the nominal 230V. <\/p>\n\n\n\n

Apparently other parts of Singapore also experienced some form of voltage disturbance (dip or variation), depending on their locations (including my home – which is about 40km away from Loyang\/Changi). Thus, confirming this was a transmission level related event. <\/p>\n\n\n\n

Update: Due to a 230kV cable fault (single-phase fault on Phase L2) in Jurong Island. <\/p>\n\n\n\n

Here are just some trends and a waveform of the event that was captured by our portable PQ analyzers.<\/p>\n\n\n\n

\"\"<\/a>
At LV PG Incomer 1<\/figcaption><\/figure>\n\n\n\n
\"\"<\/a>
At LV PG Incomer 2<\/figcaption><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n

And the voltage trend from my home’s PQUBE3,<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Updated 20\/9\/2024:<\/p>\n\n\n\n

From another portable PQ analyzer that was monitoring in the northern area of Singapore.<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

From another portable power logger that was monitoring in the western area of Singapore<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"

Earlier this afternoon, our portable PQ analyzers (monitoring at Low Voltage) at two different main incomers (in Loyang\/Changi) saw a significant drop in voltages. Technically, not a voltage dip here as the drop was less than 10% of the nominal 230V. Apparently other parts of Singapore also experienced some form of voltage disturbance (dip or […]<\/p>\n","protected":false},"author":1,"featured_media":204,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_newsletter_tier_id":0,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[13,10],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/powerquality.sg\/wordpress\/wp-content\/uploads\/2014\/03\/fig1-definition.png","jetpack_shortlink":"https:\/\/wp.me\/p41TEZ-dl","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827"}],"collection":[{"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=827"}],"version-history":[{"count":5,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827\/revisions"}],"predecessor-version":[{"id":841,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/827\/revisions\/841"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/204"}],"wp:attachment":[{"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=827"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=827"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=827"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}