Anti-interference manganese-copper current divider
A manganin shunt and manganese copper technology, applied in the field of shunts, can solve the problems of inaccurate meter measurement, inaccurate sampling of manganese copper to microvolt signals, etc.
Active Publication Date: 2015-01-07
ZHEJIANG LIHUI ELECTRIC COMPANY
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Problems solved by technology
[0003] The manganese-copper shunt of existing structure comprises conductive sheet and manganese-copper sampling sheet on both sides, and the two ends of manganese-copper sampling sheet are respectively provided with the terminal post that is used to connect sampling line, and the two ends of manganese-copper sampling sheet are connected with the two sides respectively. The conductive sheets are connected, and the conductive sheet on one side is connected to the lead-out end of the relay. The manganese-copper sampling sheet is a whole piece of plate structure. When the product of this structure is disturbed by the external magnetic field, the sampling of manganin-copper can reach microvolts. The signal is inaccurate, even when there is no current, if there is magnetic field interference from the outside, there will be signals at both ends of the sampling line, resulting in inaccurate measurement of the meter
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[0020] Such as figure 1 , figure 2 As shown, embodiment one of the anti-jamming manganin shunt of the present invention includes conductive sheets 2 and manganese-copper sampling sheets 1 on both sides, and the two ends of the manganese-copper sampling sheet 1 are respectively provided with binding posts 19 for connecting the sampling lines , the two ends of the manganese-copper sampling sheet 1 are respectively connected to the conductive sheets 2 on both sides, and they can be fixed together by ultrasonic welding, as image 3 As shown, when this embodiment is assembled to a relay for use, the conductive sheet 2 on one side is connected to the lead-out end of the relay.
[0021] Such as figure 1 , figure 2 As shown, the manganese-copper sampling sheet 1 in the first embodiment has three reference planes a, b, and c perpendicular to each other in space, and the three reference planes are virtual planes existing in space. The three datum planes in are based on the orienta...
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The invention provides a manganese-copper current divider, which can be used for effectively reducing external magnetic field interference. The manganese-copper current divider comprises conducting strips on both sides, and a manganese-copper sampling strip, wherein the two ends of the manganese-copper sampling strip are provided with binding posts for connecting sampling lines respectively; the two ends of the manganese-copper sampling strip are connected with the conducting strips on both sides; the manganese-copper sampling strip is provided with three reference planes which are vertical pairwise in a space; the two ends of the manganese-copper sampling strip are symmetrically distributed on both sides by taking one reference plane as a center; and the projection area of the manganese-copper sampling strip on the central reference plane is larger than the projection areas of the manganese-copper sampling strip on the other two reference planes.
Description
technical field [0001] The present invention relates to a shunt, in particular to a manganin shunt used together with a relay in an intelligent electric meter. Background technique [0002] Manganin is a metal with a very small temperature coefficient (that is, the change of the resistance of manganin with temperature is basically negligible, for example, the resistance of copper increases by 4 / 1000 when the temperature rises by one degree). According to U=I*R, the R of manganese copper is constant, then manganese copper can be connected in series to the circuit, and the voltage value at both ends of manganese copper can be measured to feedback the magnitude of the current. The maximum current connected to the terminals of the moving piece and the static piece of the relay can reach 80A and 220V AC. This kind of high current and high voltage cannot be directly used by the metering circuit (the electricity bill circuit of the smart meter) and the measuring circuit. We genera...
Claims
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IPC IPC(8): G01R11/02
Inventor 万晓东张自有
Owner ZHEJIANG LIHUI ELECTRIC COMPANY