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<blockquote data-quote="Sidewinder" data-source="post: 424287" data-attributes="member: 9512"><p>Don't forget that an AC iso will not carry as much current as a DC iso, i.e. not all AC iso's are RMS rated, so if this one wasn;t then it would not necessarily take the full load current of the panels.</p><p></p><p>Some are, but, not all.</p><p></p><p>The break gap is often achieved for 2 pole dc by using a 4 pole ac iso, so you double break the supply, this prevents the arc drawing and gives the needed contact seperation.</p><p></p><p>Trouble is not all of the solar installers knew this.</p><p></p><p>So they would remove the doubling up links and just use 2 poles, then you have issues with isolation.</p><p></p><p>However, I do suspect that it is just a poor termination.</p></blockquote><p></p>
[QUOTE="Sidewinder, post: 424287, member: 9512"] Don't forget that an AC iso will not carry as much current as a DC iso, i.e. not all AC iso's are RMS rated, so if this one wasn;t then it would not necessarily take the full load current of the panels. Some are, but, not all. The break gap is often achieved for 2 pole dc by using a 4 pole ac iso, so you double break the supply, this prevents the arc drawing and gives the needed contact seperation. Trouble is not all of the solar installers knew this. So they would remove the doubling up links and just use 2 poles, then you have issues with isolation. However, I do suspect that it is just a poor termination. [/QUOTE]
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