描述
變頻器產(chǎn)生功率較大的諧波,其干擾途徑與一般電磁干擾途徑是一致的,即通過電路耦合、電磁輻射、感應(yīng)耦合產(chǎn)生干擾電壓或電流。而影響儀表及控制系統(tǒng)的主要干擾源有:現(xiàn)場的強(qiáng)電磁場,供電電源的波動(dòng)。
在現(xiàn)場要判斷是否是變頻器產(chǎn)生的干擾?比判斷其它的干擾要容易些。在出現(xiàn)干擾時(shí)把變頻器停了,如果儀表及系統(tǒng)立刻恢復(fù)正常,可以肯定干擾是由變頻器引起的,就應(yīng)采取相應(yīng)的措施了。
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Acterna BAT-2700 TestPad Base Station & Air Interface
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Fluke Networks Fiber Optic Ceaning Kit NFC-KIT NFC
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Fluke 700P05 Guage Pressure Module 700 P05 700-P05
Fluke Networks 650 LAN Cable Meter Cat5 Coaxial Tester
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