aIn case the earthing resistance achieved by one rod is not sufficiently low for the purpose required, additional lengths or additional rods shall be installed. 万一一把标尺达到的地面电阻为需要的目的不是充足地低的,将安装另外的长度或另外的标尺。[translate]...
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Electrical circuits have two main problems: "short" and "open". Define these two conditions with a diagram and an example showing the consequence of each of these faults. When connecting a simple AC circuit, why does not the polarity matter? What is the purpose of ...
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By assymmetry of the duct the adaptor can be fitted in only one way, an earthing contact 14 making first contact on entry. In Fig. 5 and in a second embodiment Figs. 19-28 (not shown), the pattern of energisation of four auxiliary conductors 3-6 required to switch the appliance is ...
air within to move a diaphragm. The moving diaphragm actuates a switch that initiates tripping of the transformer. Sudden pressures, such as oil circulating pump surges, are normal operating events and the relay must be set to ride through them. In practice, it is necessary to make sure the...
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By assymmetry of the duct the adaptor can be fitted in only one way, an earthing contact 14 making first contact on entry. In Fig. 5 and in a second embodiment Figs. 19-28 (not shown), the pattern of energisation of four auxiliary conductors 3-6 required to switch the appliance is ...
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