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MEASURING ARRANGEMENT FOR MEASURING AN EFFECTIVE VALUE OF AN AC VOLTAGE IN A HANDHELD POWER TOOL
MEASURING ARRANGEMENT FOR MEASURING AN EFFECTIVE VALUE OF AN AC VOLTAGE IN A HANDHELD POWER TOOL
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机译:测量手持式电动工具中交流电压有效值的测量装置
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摘要
A hand-held power tool is disclosed with a measuring system for determining an effective value of an alternating voltage which is fed via an external conductor with respect to a neutral conductor. A regulated direct voltage source has a power supply potential which is referenced to the neutral conductor. There is a first resistance value from the power supply potential to a tap and a second resistance value from the tap to a ground. A voltmeter has a measurement range and its measurement input is connected to the tap. A measurement line connects the tap to the external conductor. The first resistance value is lower than the second resistance value such that the mean voltage value on the tap is equal to the mean of the measurement range for one period of the alternating voltage.
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