CN215006797U - Anti-misoperation safety intelligent pre-payment electric meter - Google Patents
Anti-misoperation safety intelligent pre-payment electric meter Download PDFInfo
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- CN215006797U CN215006797U CN202121427705.3U CN202121427705U CN215006797U CN 215006797 U CN215006797 U CN 215006797U CN 202121427705 U CN202121427705 U CN 202121427705U CN 215006797 U CN215006797 U CN 215006797U
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Abstract
The application provides a prevent safe intelligent prepayment ammeter of maloperation, its intelligent metering system includes central control unit and the electric quantity metering unit of being connected with each control end of central control unit, sell electric card plug-in card unit, built-in total accuse service entrance switch, still including the safe unit of prearranging of preventing maloperation, this safe unit of prearranging is for having outside binding post that presets, by its turn-off of central control unit preferred collection, in order to be used for controlling the digital level converting circuit that built-in total accuse service entrance switch pulled and closed. The technical scheme effectively avoids the possible switching-on and switching-off misoperation in the field fault removal or other emergency maintenance operations, and reliably ensures the safety of field operators and the safety of instrument equipment.
Description
Technical Field
The patent application relates to an electric energy meter device, in particular to an intelligent electric energy meter which is related to payment and charges and controls according to the electric energy consumption.
Background
The intelligent electricity meter related to the application is mainly an intelligent electricity meter for charging according to electricity consumption or prepaying electricity charges, an intelligent system of the intelligent electricity meter comprises a central control unit, a built-in incoming line master control switch, an electricity metering unit, an electricity selling plug-in card unit and other external functional units, and the other functional units mainly comprise a display screen unit, a key unit, a state indicator lamp unit, a remote communication unit and the like. In order to ensure the safety of operators, before field operation, the on-site intelligent electric power meter is generally determined whether to be connected into a power grid or not by remotely outputting a control command for controlling the on-site built-in incoming line master control switch through an on-site switching function card or a superior platform. However, in some cases, if the electric meter needs to be emergently maintained or has other faults, the connection between the electric meter and the power grid needs to be cut off, and the electric meter is kept in a cut-off state during troubleshooting, but if other personnel on the site or the site and a superior platform cannot be timely and effectively communicated, misoperation is easily carried out on the electric meter, and the safety of field operators and instrument equipment can be endangered.
Disclosure of Invention
The invention aims to eliminate the possibility of misoperation of opening and closing the electricity meter and ensure the safety of field operation, and provides the safe intelligent prepayment electricity meter capable of preventing misoperation.
The application provides a prevent safe intelligent prepayment ammeter technical scheme of maloperation, its main technical content is: the intelligent metering system comprises a central control unit, an electric quantity metering unit connected with each control end of the central control unit, an electric card selling unit, a built-in master control incoming line switch and other peripheral functional units.
In one preferred item of the above overall scheme, the built-in master control incoming line switch is a magnetic latching relay.
In order to improve the anti-interference performance to external operation and realize the level conversion function, the external switch preset terminal of the safety preset unit is connected to the wiring acquisition loop at the input end of the isolation optical coupler and is connected to an I/O bus of the central control unit through the output of the isolation optical coupler.
The application discloses prevent safe intelligent prepayment ammeter technical scheme of maloperation, the effectual field trouble shooting of having avoided or other urgent maintenance operations in the middle of other operations built-in total accuse service incoming switch pulls off the combined floodgate or remote operation pulls off the combined floodgate maloperation possibility, reliably guarantees field operation personnel safety and instrument equipment's safety.
Drawings
Fig. 1 is a block diagram of a circuit configuration of an intelligent metering system according to the present application.
Detailed Description
The utility model provides a safe type intelligence electricity meter of maloperation of preventing of this patent application, its intelligent metering system include central control unit with correspond the electric quantity metering unit, the card unit of selling electric card, built-in total accuse inlet wire switch and other peripheral functional units who connect in each function port of central control unit.
The central control unit extracts the power consumption information of the metering circuit after processing the acquired signal according to a program instruction; the card inserting unit of the electricity selling card is an inserting socket unit for a user to pre-purchase an electricity storage card, the central control unit detects card inserting information of the card inserting unit of the electricity selling card according to a program instruction, when a card residual value is close to or lower than a minimum limit, an alarm is given until a built-in master control incoming line switch is disconnected by switching off, and when the card value is sufficient, the built-in master control incoming line switch is switched on by switching on; the built-in master control incoming line switch is a switching-on master switch connected to a user load line and a power grid incoming line, and in this embodiment, the master switch part is a magnetic latching relay connected to a control bus end of the central control unit.
The peripheral function unit mainly comprises a conventional display screen unit, a key unit, a pulse debugging unit, a state indicator light unit, a remote communication unit and the like. The remote communication unit mostly adopts an RS485 communication interface unit, and remotely transmits information such as data or debugging parameters of a superior platform, such as remote power consumption recharging of a user or remote switching control of the superior platform on a built-in master control incoming line switch.
The intelligent metering system also comprises a safety preset unit for preventing misoperation, wherein the safety preset unit is a digital level conversion circuit with an external preset wiring terminal, the output of the digital level conversion circuit is connected to an I/O bus of the central control unit, and the central control unit correspondingly controls the on-off of the built-in master control incoming line switch according to the collected high and low level information at the highest priority level. As shown in the figure, the external preset wiring terminal is connected into a wiring acquisition loop of the isolation optical coupler for direct current 5V power supply, and is output to an I/O bus of the central control unit through level conversion of the isolation optical coupler to 3.3V, so that the anti-interference performance of manual short circuit or disconnection of the external preset wiring terminal is improved while the level conversion is realized. After the external preset wiring terminal is manually short-circuited, the central control unit I/O bus receives the signal that the original high level is converted into the low level, after the signal is judged by a program, the highest priority outputs a tripping and breaking control instruction to the built-in master control incoming line switch, the state can effectively avoid the misoperation of switching on and switching off or remote switching on and switching off of the built-in master control incoming line switch in other operations, only when the field fault is eliminated or the maintenance operation is completed, the field operator manually disconnects the external preset wiring terminal, after the central control unit I/O bus receives the signal that the low level is converted into the high level from the new low level, the program is judged to be in an allowable state, namely the normal working state of the switching-on/off operation or the remote switching-on/off operation of other operation built-in master control incoming line switches, therefore, possible misoperation in field fault removal and other emergency maintenance operations is effectively avoided, and the safety of field operators and the safety of instrument equipment are ensured.
Claims (3)
1. The intelligent metering system comprises a central control unit, an electric quantity metering unit connected with each control end of the central control unit, an electric card selling unit and a built-in master control incoming line switch, and is characterized by also comprising a safety preset unit for preventing misoperation, wherein the safety preset unit is a digital level conversion circuit with an external preset wiring terminal, is preferentially collected by the central control unit to be turned off and is used for controlling the switching on and off of the built-in master control incoming line switch, and the output of the digital level conversion circuit is connected to an I/O bus of the central control unit.
2. The anti-misoperation safe intelligent prepaid electric meter according to claim 1, wherein the built-in master incoming line switch is a magnetic latching relay.
3. The anti-misoperation safe intelligent prepaid electric meter according to claim 1, wherein the external switch preset terminal of the safe preset unit is connected to the wiring collection loop at the input end of the isolation optical coupler, and is connected to an I/O bus of the central control unit through the output of the isolation optical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121427705.3U CN215006797U (en) | 2021-06-25 | 2021-06-25 | Anti-misoperation safety intelligent pre-payment electric meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121427705.3U CN215006797U (en) | 2021-06-25 | 2021-06-25 | Anti-misoperation safety intelligent pre-payment electric meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215006797U true CN215006797U (en) | 2021-12-03 |
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ID=79103062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121427705.3U Active CN215006797U (en) | 2021-06-25 | 2021-06-25 | Anti-misoperation safety intelligent pre-payment electric meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215006797U (en) |
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2021
- 2021-06-25 CN CN202121427705.3U patent/CN215006797U/en active Active
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