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 <title><![CDATA[请教一个电加热管的问题]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745.html]]></link>
 <description><![CDATA[Latest 50 replies of 请教一个电加热管的问题]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[三相3p漏电保护]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#2325567.html]]></link>
 <author><![CDATA[严生318611]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 28 Nov 2022 09:38:19 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[quote]引用楼主longfei1982于2013-10-25 12:10发表的 请教一个电加热管的问题 :
三根380v的电加热管接成三角形接法，如果有其中一根加热管断线，要让控制三根加热管的接触器跳闸，该怎么做。
[/quote]

用三根热敏电阻加一个继电器,通过温控表的上限报警来控制继电器给电.]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#2325565.html]]></link>
 <author><![CDATA[浪子海风]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 28 Nov 2022 09:29:21 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[用零序应该比较合理]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1503168.html]]></link>
 <author><![CDATA[yexiao]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Oct 2013 04:19:24 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[就用电流检测就好了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1503017.html]]></link>
 <author><![CDATA[爱不离]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 30 Oct 2013 00:47:18 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[quote]引用第4楼sanlihu于2013-10-25 17:54发表的&nbsp;&nbsp;:
用个零序电流互感器就中
[/quote]
零序电流互感器怎么检测？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502943.html]]></link>
 <author><![CDATA[liuhuaxing]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Oct 2013 13:58:05 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[quote]引用第12楼xyc于2013-10-28 12:40发表的&nbsp;&nbsp;:
用电动机保护器或用零序电流保护,但在三角形电路中作零序保护零要用三个电容作人工中心点
才行,楼上建议用零序电流瓦感嚣比较方便.
[/quote
零序电流瓦感嚣怎么检测?]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502942.html]]></link>
 <author><![CDATA[liuhuaxing]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Oct 2013 13:55:54 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[2楼的办法最好。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502756.html]]></link>
 <author><![CDATA[xdfzjf]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Oct 2013 06:11:57 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[从理论上讲，采用零序I互感器比较好用，不过可能不好保证三相电流完全平衡，也就是说，零序互感器会有电流流过，只不过多少不好确定，需要设置一下才行]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502744.html]]></link>
 <author><![CDATA[lty504351]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Oct 2013 05:10:35 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[加一个热计电器，]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502722.html]]></link>
 <author><![CDATA[机电壹家]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 29 Oct 2013 04:22:30 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[就是我想用继电器做一个，有什么方案吗？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502478.html]]></link>
 <author><![CDATA[longfei1982]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 28 Oct 2013 12:01:57 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[用电动机保护器或用零序电流保护,但在三角形电路中作零序保护零要用三个电容作人工中心点
才行,楼上建议用零序电流瓦感嚣比较方便.]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502212.html]]></link>
 <author><![CDATA[xyc]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 28 Oct 2013 04:40:25 +0000]]></pubdate>
</item>
<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[1楼、2楼的方法都行]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502167.html]]></link>
 <author><![CDATA[kgao08885]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 28 Oct 2013 02:40:52 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用温控器可以用它断路检测]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1502012.html]]></link>
 <author><![CDATA[plc420827]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 27 Oct 2013 13:27:32 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加漏保]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501276.html]]></link>
 <author><![CDATA[tangrenbo89]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 13:20:55 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[电动机综合保护器]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501263.html]]></link>
 <author><![CDATA[zhengjianjun]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 13:05:32 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[热继如何检测到无电流呢?说说原理]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501262.html]]></link>
 <author><![CDATA[rockyhuo]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 13:04:54 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加热继电器！ [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501243.html]]></link>
 <author><![CDATA[xghjiayou]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 12:20:23 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加电动机保护器，最简单的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501221.html]]></link>
 <author><![CDATA[songzuolei]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 11:14:00 +0000]]></pubdate>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[用个零序电流互感器就中]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501184.html]]></link>
 <author><![CDATA[sanlihu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 09:54:12 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[2楼正解]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501093.html]]></link>
 <author><![CDATA[huhuil1l1]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 07:21:29 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:28]电动机综合保护器]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501056.html]]></link>
 <author><![CDATA[qwe123zxclk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 05:38:56 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加个电流互感变送器，通过判断电流来控制]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1440745#1501035.html]]></link>
 <author><![CDATA[xcaq123]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Oct 2013 04:22:54 +0000]]></pubdate>
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