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<table border="0" cellpadding="3" cellspacing="1" width="100%" class="forumline"> <tr> <th class="thCornerL" width="22%">Autor</th> <th class="thCornerR">Wiadomość</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>defgf10aj</b></span></td> <td class="row1" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/Elveron/images/icon_minipost.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Wysłany: Pon 18:58, 29 Lis 2010<span class="gen"> </span> Temat postu: ghd stijltang New electrical safety test devices o</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">,<a href="http://www.ghdstijltang.net" target="_blank" class="postlink">ghd stijltang</a> <br />New electrical safety test devices of protective equipment <br /> <br /> <br />Dynamic test or manual test. 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Throughout the experiment,<a href="http://www.uggsstiefel.org" target="_blank" class="postlink">ugg stiefel</a>, test only need a simple operation, you can complete the whole process of experiment,<a href="http://www.ghddeutschlands.com" target="_blank" class="postlink">ghd deutschland</a>, truly automatic test. Test is completed, automatically save test data. 4 performance test leakage current error <+ O. 1%. Effective wireless transmission distance ≥ 20m. 5 Conclusion The product uses wireless duplex communication means to achieve a high voltage test area and the operator of the isolation distance of more than 20m, to ensure the personal safety of test operation, innovative design. Is a precedent has not been at home and abroad test equipment, electrical safety equipment is the replacement test equipment upgrades. The project was 20o5 in Jiangxi Science and Technology Department through the new product technical appraisal, the conclusion of comprehensive technical indicators at the domestic leading level. Table 1 AC voltage (the amount of ff ~ -) 50000V show the measured value (%) 10.0020,0030.0040.0050,0060,0070,0080,0090.00100,00 test error (%) 0.03O. 02O. 05O, 03O. 01O. 03O. 020.02O. 03O. 01 Table 2 Leakage current measurement error (range) show the measured value (%) test error (%) wireless interface 10mA2mA5OO10.0050. oo1oo, 0010.0050.001oo, 0010.0050,00100.00 O. 05O, O5O. O2O. O60, 040.030,080.060,06 30m from the test device of the safety equipment is only protective equipment used to detect the AC leakage current parameters, by changing the pressure applied to the value of protective equipment to detect the high pressure of the corresponding leakage current, in order to determine the exchange of the protective equipment leakage current parameters are qualified. High pressure generated by the SPWM power adjustable O ~ 200V AC voltage step-up ratio of 1:250 by the booster voltage to achieve the O ~ 50000V, all the way to be added to the specimen and the other by passing divider 250:1 ratio of step-down to 0 ~ 200V AC voltage, to provide test points for the high-pressure measurement to the voltage detection circuit to detect its processing and display, to realize the high-pressure measurements. When the test point measurements show that the voltage 20oV, then the corresponding pressure is 5. Beijing Electric Power Research Institute to test its performance, using the HP34401 digital multimeter to measure the voltage test points, the corresponding measured value = measured pressure indication × 250, contrast of the device shows high voltage value (measured show value), measured data in Table 1. Leakage current detected by current sources in BS301 Standard Reference 【1】 Sukui Feng, Lu, et al, TMS320F2812 principles and development 【M】, Electronic Industry Press, 2005. 【2】 Peng Jinping, Zhao Feng, et al. Monolithic Power Systems nRF2401 and its application Distance Wireless Meter Reading】 【J. Electrical Measurement and Instrumentation, 2005, (2) :39 - 41. 【3] 3ChipeonAS. ChipeonASSmartRFCC2420PreliminaryDatasheet 【z】. ChipeonAS. 2003.11. 【4] Yao Bin. Thousand anti-jamming technology sensor circuit. Coal Technology, 2004,23 (3). 【5】 Zhang XD. Modern signal processing 【Tsinghua University Press, 2002. f6] Xueyong Yi, SY, He Xi only. New power circuit application examples 【M】. Electronic Industry Press. ', 2002. Author: Qiong (1966 -), male, Nanchang Institute of Aeronautical University Associate Professor of Electronic and Information Engineering has been engaged in power detection and wireless communications research and teaching. Bear Water Development (1967 a), male, Octopus Electronics Co., Ltd., Xinyu City, senior engineer, engaged in research and development of AC sampling device. Wu Kai-zhi (1983 a), male, Nanchang Aeronautical University Graduate School of Electronic and Information Engineering, industrial measurement and control technology. 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