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<div class="dis_newtitle">天明伟业：功率电容器技术参数介绍</div>
<div style="padding-top:10px; text-align:center">
点击：86&#12288;添加时间：2016-06</div>
<div style="padding:8px 0 6px 0; margin:auto; line-height:23px; width:100%"><p>
	<span style="line-height:2;font-family:Microsoft YaHei;font-size:14px;"> </span> 
</p>
<div class="ArticleTitle" style="text-align:center;color:#404040;font-family:微软雅黑;">
	<h1 style="font-size:22px;font-weight:normal;color:#000000;">
		天明伟业：功率电容器技术参数介绍
	</h1>
</div>
<div class="ArticleContent" style="color:#404040;font-family:微软雅黑;">
	<p>
		“DAWN天明”牌自愈式低压并联电容器，采用金属化聚丙烯薄膜作为介质，引进国外先进的生产技术，工艺和设备，按GB/T12747及IEC60831-1：1996标准组织生产。产品主要用于低压电网，以减少无功损耗，提高功率因数，改善电网质量。
	</p>
	<p>
		主要特点<br />
1、体积小、重量轻。由于采用金属化聚丙烯薄膜作为介质，体积与重量仅为老产品的1/4和1/6。<br />
2、损耗角正切值小，温升低、使用寿命长。“高云”牌电力电容器的独特设计，使产品自身消耗的有功功率极小，所以电容器损耗角正切值&lt;＝０.０６％，远远低于GB／T12747-1991标准0。2%的要求，正常使用温升&lt;3摄氏度。正因为如此，“天明DAWN”电力电容器较其他产品使用寿命更长。<br />
3、耐高压、安全性能好。“天明DAWN”电力电容器选材考究，设计场强较小，端子间的耐压远远高于2.15Un10秒的型式试验要求，其瞬时击穿电压一般&gt;3.5Un。产品内置放电电阻及过压力隔离器（防爆装置），运行与维护极为安全可靠。
	</p>
	<p>
		主要技术参数<br />
1、额定电压（Un）：0.25-2kVAC<br />
2、额定输出（Qn）：1-200kvar<br />
3、容量偏差：-5～+10%<br />
4、损耗角正切值 &lt; 0.1%Un 50Hz 20 ℃<br />
5、耐压 极壳：0.5kV以下产品3000VAC10秒<br />
0.5kV以上产品2Un+2kV10秒 极间：2.15Un2秒<br />
6、最高允许电压：&lt;110%Un<br />
7、最大允许电流：&lt; 130%IN<br />
8、自放电特性：电容器断开电源3分钟后剩余电压&lt; 75V 主要技术参数<br />
无有害气体和蒸气、无导电性或爆炸尘埃及无剧烈振动的户内。<br />
1、海拔高度：&lt; 2000m<br />
2、环境温度：－25/B(-25℃/45℃)<br />
3、湿度：&lt; 85%RH
	</p>
	<p>
		安装运行导则：<br />
1、额定电压的选择：电容器的额定电压至少等于电容器接入电网的运行电压，考虑到电容器本身和网络谐波的影响，应留出适当的裕度。这点很重要，因为电容器介质上的电压过高，电容器的性能和寿命将受到不利影响。<br />
2、运行温度：对电容器的运行温度及环境温度应予以注意，因为它对电容器的使用寿命有很大影响，超过上限的温度将加速介质的电化学老化。设置二台以上电容器时，其间距尽量&gt;30mm，夏季温度过高时，应采取有效降温措施。<br />
3、过电压：对易于受到高的雷电过电压，电容器应采取避雷器做适当保护，并尽量靠近电容器安装。当电容器固定连接在电动机上时，为防止电动机从电源切断后发生自激产生高于系统电压很多的电压，建议选择电容器电流小于电动机的空载电流，一般为90%为宜。<br />
4、过电流：电容器决不可在电流超过额定电流1.3倍的情况下运行。过电流可能由基波电压过高、谐波或者是两者共同引起的。为确保电容器的使用寿命，即使电流载1.3倍以内，但仍超过额定电流值，请慎用。在有谐波源的网络中使用电力电容器应选择串联电抗器。<br />
5、电容器的投入与切出：<br />
㈠单台设备配置电容器，在切断设备电源开关的同时切出电容器。<br />
㈡电容器在退出运行后再次投入时，为防止电压叠加到电容器上，在3分钟后方可投入。<br />
㈢当夜间负荷减轻时，电容器端子电压可能升得很高，应考虑将电容器部分或全部退出。<br />
6、安装：<br />
㈠电容器安装时相互间隔最好大于30mm。<br />
㈡电容器的出现端子接线用软连接方式为宜。
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