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A terminal button box access line sequence detection circuit and a detection method using the circuit

A detection circuit and access line technology, applied in the field of terminal button box access line sequence detection circuit, can solve the problems of occupation of labor stations and low efficiency of manual detection, saving labor cost, saving detection process, and improving detection efficiency Effect

Active Publication Date: 2022-07-29
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] At present, the inspection of the access line sequence in the production workshop is all through manual inspection. Since the 3-way access lines for anti-theft electricity are all white, there is no color distinction, the efficiency of manual inspection is low, and it takes up manual work stations.

Method used

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  • A terminal button box access line sequence detection circuit and a detection method using the circuit
  • A terminal button box access line sequence detection circuit and a detection method using the circuit
  • A terminal button box access line sequence detection circuit and a detection method using the circuit

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Embodiment Construction

[0033] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

[0034]In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. must have a specific orientation, b...

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Abstract

The invention discloses a line sequence detection circuit connected to a terminal button box. Three anti-power-stealing CTs are arranged in the terminal button box, corresponding to A-phase, B-phase and C-phase respectively. The detection circuit comprises an MCU control circuit, A current sampling circuit, an anti-stealing resonance sampling circuit and an AC / DC conversion circuit, the output end of the AC / DC conversion circuit is connected to one of the input ends of each phase anti-stealing CT through a power resistor, and each phase is anti-stealing The current signal output end of the electrical CT is connected to the input end of the current sampling circuit, the anti-stealing signal output end of each phase of the anti-stealing CT is connected to the input end of the anti-stealing resonant sampling circuit, and the current sampling circuit and the anti-stealing circuit are connected. The output ends of the electric resonance sampling circuit are all connected to the input ends of the MCU control circuit, and a switch element whose on-off is controlled by the MCU control circuit is connected between the two input ends of each phase anti-theft CT. Also disclosed is a current and anti-stealing access line sequence detection method using the detection circuit.

Description

technical field [0001] The invention relates to the field of electronic measurement, in particular to a line sequence detection circuit for connecting a terminal button box and a detection method using the circuit. Background technique [0002] Power terminal products, such as electric energy meters, are measuring tools for measuring electric energy, and terminal button boxes are an important part of electric energy meters. In the power industry, China Southern Power Grid requires anti-stealing functions for terminal products. Most of the anti-stealing structures currently used are anti-stealing CTs (current transformers). At present, the primary side of the anti-stealing CT used in the terminal of China Southern Power Grid is welded on the current terminal of the terminal box, that is, the terminal box and the anti-stealing CT are integrated, and the current is drawn from the secondary side of each phase CT. terminals and anti-tamper terminals. see figure 1 , the primary...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/67G01R15/20
CPCG01R31/67G01R15/20
Inventor 李正午吴军伟戴银斌
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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