一点多址微波防雷接地要点
随着电力系统的发展，科技水平的提高，综合自动化、四遥改造的深入，一点多址微波为远动、电度量等提供了良好的传输通道，以优良的音质和较高的可靠性替代了电力载波的传统地位而成为目前面向变电所的主要通信手段。<br /> 在一点多址微波的施工维护中，也有其特殊性。和传统干线微波一样，防雷接地是设备安全稳定进行的重要保证，在施工中要注意以下点：
<br /> 1、 微波铁塔接地网应围绕塔基作成闭合环形接地网，铁塔接地网与发电厂、变电所的接地网间至少要用2根规格不小于40×4的扁钢相连，这一点犹为重要，因为变电所主网与独立微波塔两地网间距离很近，并有电气上的相互连接，若不相连，极易造成两地网间的反击而损坏设备，并且若变电所设独立微波塔，通常是塔与避雷针合用，在变电运行规程中，避雷针是独立接地，不与主网相连。而一点多址微波的接地要求与常规的避雷针接地方式不一样，这一点也引起变电运行人员的困惑而出现挖断主网与微波塔地网间联接扁钢的事件，对微波设备的安全造成了极大的危害，这一点应引起通信人员和主管领导足够的重视。
<br /> 2、 馈线接地也一般采用在靠近天线处，离开铁塔处和进机房前三点接地，前二处接地做在铁塔上，进机房前的接地可做在机房处的法拉第笼上，也可与机箱一起做在控制室（或机房）的接地环网上。
<br /> 3、 对于塔楼合一的用户站、中继站，楼体（一般为主控室）应敷设法拉第笼等均压设施并与主网联接，房顶平面任一点到均压带间的距离均不应大于5米。
<br /> 4、 馈线离开铁塔进机房前，应通过馈线桥进入机房（主控室馈线桥两端应接地），但由于条件限制，我们都采用钢铰线挂接馈线。这样，在主控室（或机房）端的钢铰线就应用多股铰铜线与主控室（或机房）接地相连。
<br /> 5、 微波设备外壳应与机房或主控室内接地环网可靠连结，并经常检查其连接的可靠性。
<br /> 6、 微波设备上用户板接线端子应加接防雷保安单元，并与机壳相连，分线箱应可靠接地，机箱内电源板上应加装保护单元。
<br /> 7、 蓄电池整流模块上48V输出端子应加装压敏电阻，整流模块交流输入端应加装防雷器，防止雷害从交流电源侵入。除完成以上各点外，还应每年测试各站的接地电阻，并检查各接地点接地装置的可靠性，确保一点多址微波设备完全稳定的运行。 支持 Leave a group when wow power leveling it bogs you down.
<br />3) Play a Multi-Zone game. When you hit level 10 or so, its time to run to the nearest "other"
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<br />starting area and do the quests there. You will do them fast, and get exp for all the kills (as long
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<br />as they wow power leveling are colored green to
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<br />you) Doing a load of quests 3-5 levels beneath you really racks up EXP fast.
<br />4) Green wow power leveling quests are
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<br />your friends! These are quests that are 2-3 levels beneath you. When I get a bunch of yellow colored
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<br />wow power leveling quests, sometimes I'll just 'level grind' 2-3
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<br />levels, then power through the quests solo. It basically comes to this: If you are getting killed
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<br />its better to grind a level and do it later.
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<br />buy wow gold for several days. It requires you to
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<br />you 3 hours. Or that quest you forgot to do way back in Elwynn Forest, and now you're all the way in
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<br />the Wetlands. DUMP IT. There are thousands of quests in this game.
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<br />to 'finish' that green or gray quest is not worth it.
<br />Abandon that quest, and wow gold uk replace it with
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<br />others.
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