{"id":249,"date":"2014-07-27T10:38:06","date_gmt":"2014-07-27T02:38:06","guid":{"rendered":"http:\/\/powerquality.sg\/wordpress\/?p=249"},"modified":"2014-07-27T17:36:42","modified_gmt":"2014-07-27T09:36:42","slug":"230kv-voltage-dip-27-07-2014-0925-am","status":"publish","type":"post","link":"http:\/\/powerquality.sg\/wordpress\/?p=249","title":{"rendered":"230kV Voltage Dip 27-07-2014 09:25 AM"},"content":{"rendered":"

Just awhile ago, if you are one of the facilities’ guys, you probably had to scramble around because of dip alarms, standby generator cutting in or chiller drop-off.<\/p>\n

Another 230kV fault was registered; affecting the South side of Singapore the most, suggesting a 230kV fault in the South block.<\/p>\n

Here is a voltage waveform from one of our sites in the South.<\/p>\n

Voltage waveform is taken at Low Voltage (L-N). It will mirror what is seen at 22kV and above (L-L).
\n(i.e L1 phase at LV is equivalent to L1L2 at 22kV).<\/p>\n

The waveform here shows that there was a single phase fault (L2) at 230kV.<\/p>\n

\"230kv<\/a><\/p>\n

Here it was registered; worst case dip of more than 50%. Other blocks in Singapore (North, West, East) would also have seen this fault, albeit at less severe values.<\/p>\n

On a happier note, Selamat Hari Raya Aidilfitri (in advance) to my fellow Muslims. Maaf Zahir Batin.<\/p>\n","protected":false},"excerpt":{"rendered":"

Just awhile ago, if you are one of the facilities’ guys, you probably had to scramble around because of dip alarms, standby generator cutting in or chiller drop-off. Another 230kV fault was registered; affecting the South side of Singapore the most, suggesting a 230kV fault in the South block. Here is a voltage waveform from […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","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":[10],"tags":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p41TEZ-41","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/249"}],"collection":[{"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=249"}],"version-history":[{"count":11,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/249\/revisions"}],"predecessor-version":[{"id":261,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/249\/revisions\/261"}],"wp:attachment":[{"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=249"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/powerquality.sg\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}