Voltage sampling and conditioning circuit

The utility model provides a voltage sampling and conditioning circuit, which comprises a conversion circuit, an isolation circuit and a protection filtering circuit, and is characterized in that the conversion circuit comprises a plurality of resistors which are connected in series; the isolation c...

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Bibliographic Details
Main Authors YU QIAO, ZHOU QIANG, YAN ZHENKUN, KOU YAN, BI XIAOHUI, PANG JIANYE, YU LITAO
Format Patent
LanguageEnglish
Published 08.04.2015
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The utility model provides a voltage sampling and conditioning circuit, which comprises a conversion circuit, an isolation circuit and a protection filtering circuit, and is characterized in that the conversion circuit comprises a plurality of resistors which are connected in series; the isolation circuit comprises a current transformer; the protection filtering circuit is connected with a secondary winding of the current transformer in parallel, a first port a clamping diode V35 is connected with a second port of a clamping diode V36, a second port of the clamping diode V35 is connected with a first port of the clamping diode V36, a third port of the clamping diode V35 is connected with one end of the secondary winding of the current transformer PT3 and a first end of an inductor L9, a third port of the clamping diode V36 is connected with the other end of the secondary winding of the current transformer PT3 and a first end of an inductor L10, and a second end of the inductor L9 and a second end of the inductor L10 are connected to sampling resistors respectively. The circuit provided by the utility model has functions of converting, isolating and filtering measured power grid voltage.
Bibliography:Application Number: CN20142590312U