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随着电力的快速发展,对川电安全可靠性要求越来越高。本文对施工现场漏电保护器频繁跳闸原因进行分析,并提出漏电保护器正确的使用方法。 相似文献
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漏电保护器灵敏度高、动作快速,作为安全保护电器,正确应用于住宅建筑电气设备中,可保证人员用电的安全性和可靠性。然而一旦出现漏电事故,将会影响人们的日常生活,严重时甚至危机生命安全造成财产损失。因此,针对住宅建筑电气漏电保护器的应用做出分析。 相似文献
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郭强 《中国新技术新产品》2012,(8):146
低压配电系统中装设漏电保护器(剩余电流动作护保器)是防止电击事故的有效措施之一,也是防止漏电引起电气火灾和电气设备损坏事故的技术措施。但安装漏电保护器后,仍应以预防为主,并应同时采取其它各项防止电击和电气设备损坏事故的技术措施 相似文献
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随着工业经济的快速发展,电器设备已广泛应用于工业生产及人们生活的各个领域,一旦出现漏电,人体触电或引起火灾的后果不堪设想,为安全用电防止触电事故发生,漏电保护器一旦超过规定电流将自动切断电源,从而避免漏电造成的人身安全和火灾现象,因此,对于研究漏电保护器的合理选型和正确使用具有重要的现实意义。 相似文献
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施工现场的用电环境一般比较差,使用的设备、线路本身安全隐患比较多,流动性、重复性、临时性较强,参加施工的用电人员甚至管理人员的素质参差不齐,在施工现场强制采用TN-S三相五线式供电方式的目的就是为了保障施工现场用电的安全及加强对用电的管理.各级漏电保护器是TN-S供电系统中最关键的保护设备,在实际施工中由于施工现场所具有的特殊性,总是造成各级漏电保护器的频繁跳闸.这不仅严重影响了施工现场的正常施工,而且使施工现场用电的安全无法得到有效的保障.本人通过在施工现场对施工用电的管理和体验,对施工现场漏电保护器频繁跳闸的原因进行了以下的分析. 相似文献
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本文叙述由电流互感器、PIC单片面、运算放大器等组成的智能漏电流保护器及其硬软件设计.智能漏电流保护器具有大漏电流和小漏电流控制,实现报警与保护作用,并具有缺相保护功能. 相似文献
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本文简要介绍了泄漏电流测量仪nA级微小泄漏电流示值的一种校准方法,并通过实例分析了该方法主要误差影响因素及相关注意事项。 相似文献
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本文根据JJG843-2007泄漏电流测量仪(表)检定规程对泄漏电流测量仪直流漏电流示值进行测量,并对测量过程中不确定度的来源进行分析,对各分量进行了详细量化,计算出该分析方法的合成标准不确定度,并给出结果的扩展不确定度。 相似文献
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一种漏电流测量仪表校准器 总被引:1,自引:0,他引:1
本文介绍一种漏电流测量仪表校准器,它由标准电流源、单片机及其外围电路组成,用于检定泄漏电流测量仪表,该仪器功能全、使用方便,其主要技术指标均满足“泄漏电流测量仪表检定规程”的要求。 相似文献
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建筑安装施工现场的触电事故发生率高,为清除事故隐患,确保施工人员安全,需装设剩余电流动作保护器(RCD).文章给出了施工现场临时用电"三级配电三级RCD保护"的方案及其主要技术参数的合理选择. 相似文献
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《IEEE transactions on instrumentation and measurement》1964,13(4):251-258
A special six-terminal ribbon resistor which makes it possible to measure accurately any current ratio from 1 to 1, up to 10 to 1, in the lower audio-frequency range, has been devised and constructed. Circuits have been designed and tested which permit the calibration of ratio and phase angle of current transformers without reference to a standard whose ratio and phase angle are known. In the experimental work it was necessary to devise methods for minimizing effects due to 1) extraneous EMFs induced in the detector circuit by magnetic fields produced from any nearby current-carrying conductor, 2) extraneous currents caused by stray capacitance?mostly between transformer windings, and 3) changes in resistance of the ribbon resistor caused by current flow. It was found that errors caused by these effects could be almost entirely eliminated at ratios near unity, but their magnitude would increase as ratio increased. By using a battery-operated tuned null detector of high sensitivity, a resolution of 1 ppm in ratio could easily be attained. At ratios near unity the estimated uncertainty in ratio was within 5 ppm. At higher ratios the uncertainty increases, but by having two sets of transformers and comparing secondary currents, it is possible to "boot strap" to higher ratios using only ratios up to 2 to 1 on the test equipment. In the present work the uncertainty in each boot-strap operation was thought to be less than 10 ppm in ratio at 60 Hz. 相似文献
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《IEEE transactions on instrumentation and measurement》1964,13(2):52-57
An instrument capable of measuring leakage current of transistors while the trarisistor remains in the circuit was developed. This instrument gives an accurate leakage current measurement in a large variety of circuits as well as being simple to operate, lightweight, battery powered, and portable for use in the field. This was accomplished by the measurement of the transistor leakage current ICBX, which is the collector current when both the collector and emitter junctions of the transistor are reverse biased. This particular leakage current was chosen because it is nearly independent of the gain parameters of the transistor and a very close approximation to the fundamental leakage current ICBO. The present instrument measures leakage currents as low as 1 ?a with a collector load resistance down to 500 ?. At present, an accurate instrument is not commercially available for measuring transistor leakage current in the circuit. The results presented in this paper indicate a method for adding the capability of measuring in-circuit transistor leakage current to future transistor testers. 相似文献
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