CN2802513Y - Monitoring metering installation - Google Patents
Monitoring metering installation Download PDFInfo
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- CN2802513Y CN2802513Y CN 200420068995 CN200420068995U CN2802513Y CN 2802513 Y CN2802513 Y CN 2802513Y CN 200420068995 CN200420068995 CN 200420068995 CN 200420068995 U CN200420068995 U CN 200420068995U CN 2802513 Y CN2802513 Y CN 2802513Y
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Abstract
The utility model relates to an electricity theft preventing monitoring and metering device which can carry out full-line monitoring to the voltage, current loop elements and conducting wires of an electric energy metering device in three-phase four-wire circuits. A three-phase four-wire metering monitor (2), a power supply device (7) of the metering monitor, a broken wire monitoring device (8) of the metering monitor, an electric energy metering connecting conducting wire (6), a three-phase four-wire electric energy meter (5), a current transformer (3), a three-phase four-wire power supply (1) and a user load (4) are electrically connected with each other in a metal casing. The monitoring metering device not only can detect a voltage loop element and a broken conducting wire metered by the electric energy meter, but also detect that a part of the current transformer is stolen and changed into a changeable current transformer with other polarities. The utility model can detect that a phase wire on the outer part of the monitoring metering device has a jumper wire and carries out bypasses and can also automatically distinguish differences between external power cut and the power cut of simple measuring loops. The utility model can automatically stop abnormal electric behaviors by cutting off a power supply circuit for preventing electric energy from losing.
Description
Affiliated technical field
The utility model relates to a kind of electric power meter, especially can carry out the anti-electricity-theft monitoring measuring apparatus of monitoring completely by voltage, current return element and the lead to electric power meter in the three-phase and four-line circuit.
Background technology
At present, known anti-electricity-theft measuring apparatus, only the current return of electric power meter is monitored or gauging table meter and various the sealing simultaneously of batch meter chamber door are monitored, detected abnormal conditions are outwards reported to the police, as application number 01219776.9, application number 02281979.7, application number 03215248.5 utility model patent is all like this.They have been ignored the voltage circuit of electric energy meter metering and have been removed the road by the people from the somewhere, or with it certain partly current transformer substitute into the current transformer of other polarity, no-load voltage ratio for another surreptitiously, or outside measuring apparatus certain phase line wire jumper and carry out bypass, cause electric energy meter normally not measure, and can't prevent the behavior of this type of undesired electricity consumption immediately; When the externally fed circuit cut off the power supply mutually, they can not discern external power circuit broken string and the difference of property metered voltage circuit breaking merely automatically, cause energy loss easily.
Summary of the invention
For the voltage circuit that overcomes the electric energy meter metering in the existing anti-electricity-theft measuring apparatus is removed the road by the people from the somewhere, or with it certain partly current transformer substitute into the current transformer of other polarity, no-load voltage ratio for another surreptitiously, or outside measuring apparatus certain phase line wire jumper and carry out bypass, cause electric energy meter normally not measure, and can't prevent the behavior of this type of undesired electricity consumption immediately; When the externally fed circuit cuts off the power supply mutually, they can not discern external power circuit broken string and the difference of property metered voltage circuit breaking merely automatically, cause the deficiency of energy loss easily, the utility model provides a kind of monitoring measuring apparatus, this monitoring measuring apparatus can not only detect the voltage circuit element and the lead outage of electric energy meter metering, can detect it certain partly current transformer substitute into other polarity for another surreptitiously, the current transformer of no-load voltage ratio, can detect certain phase line wire jumper outside the monitoring measuring apparatus and carry out bypass, can distinguish different that outside outage and simple property measurement loop cut off the power supply automatically, and can cut off its feed circuit immediately, prevent the behavior of undesired electricity consumption, prevent energy loss.
The technical scheme that its technical matters that solves the utility model adopts is: in metal shell, three-phase and four-line measuring and monitoring device, measuring and monitoring device supply unit, measuring and monitoring device disconnection monitoring device, electric energy metrical connect lead, three-phase and four-line electric energy meter, current transformer electrical connection.Switch in the three-phase and four-line measuring and monitoring device (K) end connects three-phase four-wire power A, B, the C phase, the other end passes current transformer and links to each other with user load, zero line N draws from three-phase four-wire power, passing current transformer (LHn) directly links to each other with user load, the three-phase and four-line electric energy meter by electric energy metrical connect lead respectively with three-phase four-wire power A, B, C, N line summation current transformer (LHa, LHb, LHc, LHn) connect, wherein the voltage component zero line interface of three-phase and four-line electric energy meter connects the voltage hole (LHy) that lead passes the three-phase and four-line measuring and monitoring device and joins with zero line N, one group of the current element of three-phase and four-line electric energy meter goes out line interface behind " mountain " font line parallel, it connects current aperture (LH1) and current transformer (LHa that lead passes the three-phase and four-line measuring and monitoring device, LHb, LHc) go out the line interface parallel connection, the positive pole of the electric capacity (C18) in the measuring and monitoring device disconnection monitoring device links to each other with the positive pole of the diode (D17) of three-phase and four-line measuring and monitoring device, the negative pole of the diode (D29) in the measuring and monitoring device disconnection monitoring device links to each other with the positive pole of the electric capacity (C11) of three-phase and four-line measuring and monitoring device, the positive pole of the diode (D16) in the measuring and monitoring device disconnection monitoring device links to each other with the output terminal of the operational amplifier (IC2-2) of three-phase and four-line measuring and monitoring device, the negative pole of the diode (D34) in the measuring and monitoring device disconnection monitoring device links to each other with the input end of the operational amplifier (IC2-1) of three-phase and four-line measuring and monitoring device, resistance (R1 in the three-phase and four-line measuring and monitoring device, R2, R3) connect power supply A respectively, B, the C phase, power transformer (B1 in the measuring and monitoring device supply unit, B2) connect power supply A respectively, B, C phase, the DC voltage of its output supply with the three-phase and four-line measuring and monitoring device respectively and measuring and monitoring device disconnection monitoring device uses.When the three-phase and four-line electric energy meter normally measures, pass the three-phase and four-line measuring and monitoring device voltage hole (LHy) electric current 1/1000 the peace the order of magnitude, the electric current sum of passing the current aperture (LH1) of three-phase and four-line measuring and monitoring device equals zero, switch in the three-phase and four-line measuring and monitoring device (K) is in closing position, the normal electricity consumption of user; After the voltage circuit of electric energy meter metering was broken live wire by the people from the somewhere, the electric current of the order of magnitude of one 1/100 peace appearred in the voltage hole (LHy) of passing the three-phase and four-line measuring and monitoring device, through the identification of three-phase and four-line measuring and monitoring device, promoted its switch (K) tripping operation; After electric energy meter voltage element zero line interface connection lead is broken from the somewhere by the people, the electric current that passes the voltage hole (LHy) of three-phase and four-line measuring and monitoring device equals zero, after the identification of measuring and monitoring device disconnection monitoring device, promote switch (K) tripping operation of three-phase and four-line measuring and monitoring device; When external electric source outage of the present utility model, the electric current of the order of magnitude of one 1/100 peace appears in the voltage hole (LHy) of passing the three-phase and four-line measuring and monitoring device, the resistance (R1, R2, R3) of three-phase and four-line measuring and monitoring device lacks a phase voltage simultaneously, differentiate through the three-phase and four-line measuring and monitoring device, after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; After the disconnected phase line of the electrical network of external power source of the present utility model higher electric pressure than 400V/230V voltage, the electric current of the order of magnitude of one 1/10000 peace appears in the voltage hole (LHy) of passing the three-phase and four-line measuring and monitoring device, three-phase voltage on the resistance (R1, R2, R3) of three-phase and four-line measuring and monitoring device becomes the single-phase voltage of a series connection simultaneously, differentiate through three-phase and four-line measuring and monitoring device and measuring and monitoring device disconnection monitoring device, after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; When the people changes polarity, the no-load voltage ratio of certain a few current transformer of current transformer (LHa, LHb, LH c, LHn), passing equation ia+ib+ic-in ≠ 0 of electric current of the current aperture (LH 1) of three-phase and four-line measuring and monitoring device just sets up, after the three-phase and four-line measuring and monitoring device is differentiated, promote its switch (K) tripping operation; As the people in outside of the present utility model, when walking around the utility model certain phase line being done jumper and carried out stealing, passing equation ia+ib+ic-in ≠ 0 of electric current of the current aperture (LH1) of three-phase and four-line measuring and monitoring device also sets up, after the three-phase and four-line measuring and monitoring device is differentiated, promote its switch (K) tripping operation; Thereby reach working strength that reduces the power supply management personnel and the purpose that prevents to cause energy loss without metering.
The beneficial effects of the utility model are, can in the three-phase and four-line circuit, carry out all fronts monitoring to the voltage of electric power meter, the element and the lead of current return, find in time whether monitored electric energy metrical is normal, promptly cut off improper electric consumer's power supply automatically, prevent energy loss and reduce power supply management personnel's working strength.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is first embodiment circuit theory diagrams of the present utility model.
Fig. 3 is second embodiment circuit theory diagrams of the present utility model.
Among the figure 1, three-phase four-wire power, 2, the three-phase and four-line measuring and monitoring device, 3, current transformer, 4, user load, 5, the three-phase and four-line electric energy meter, 6, electric energy metrical connects lead, 7, the measuring and monitoring device supply unit, 8, measuring and monitoring device disconnection monitoring device.
Three-phase and four-line measuring and monitoring device (2), in shell, voltage sample circuit, the logical voltage amplifier of band are electrically connected in proper order, Current sampling circuit, voltage amplifier are electrically connected in proper order, they with amplitude discrimination circuit, delay circuit, outage judging circuit, Three phase mains sample circuit, executive circuit and power circuit are electrically connected in proper order, it is characterized in that: voltage sample circuit is to electric energy The voltage circuit, current sampling circuit of table is to the current loop of electric energy meter and the three phase mains sample circuit power supply electricity to the user Monitor simultaneously in the source, by being with logical voltage amplifier, voltage amplifier, amplitude discrimination circuit, delay circuit, outage judging circuit Behind signal amplification, shaping, amplitude discrimination, time-delay, analysis and distinguishing, act on the power supply circuits that executive circuit cuts off this user.
Broken line monitoring device of metering monitor (8) can not only make all electric units in three-phase and four-line electric energy meter metered voltage loop Part and lead obtain detecting, and can distinguish electric power line failure and the metering device builtin voltage circuit breaking of power system Difference. It is characterized in that: the logical voltage amplifier of band of three-phase and four-line measuring and monitoring device is detected the metered voltage circuit breaking Signal, by the signal amplifier output low level, disconnected zero line judging circuit output high level, through disconnected zero line delay circuit time-delay, The output high level makes the amplitude discrimination circuit of three-phase and four-line measuring and monitoring device, delay circuit to the judging circuit that cuts off the power supply send signal, Improper electricity consumption is cut off in the tripping operation of promotion executive circuit; When the electrical network disconnected than the high electric pressure of 400V/230V voltage After the root phase line, disconnected phase line judging circuit output high level, the judging circuit that cuts off the power supply simultaneously also sends the high level of outage, makes two AND circuit satisfies two conditions, and the output high level makes the outage judging circuit of three-phase and four-line measuring and monitoring device will delay time electric Charging in road blocking-up, thus prevent the power failure that should not have a power failure.
Electric energy metering connecting conductor (6), in three-phase and four-line monitoring metering device, with the secondary side outlet of current transformer, Pass the current aperture of measuring and monitoring device, be electrically connected with the current element interface of electric energy meter is in parallel; Connect electricity from the power supply guide line Can show the voltage component interface, pick out with lead from the other interface of its voltage component, pass the voltage hole of measuring and monitoring device, Be electrically connected with power supply again, it is characterized in that: with the secondary side of A, B, C threephase current transformer one group of outlet Same Name of Ends wherein The bolt parallel connection is drawn one and is connected lead, and the current aperture of passing the three-phase and four-line measuring and monitoring device is with three electricity of electric energy meter One group of Same Name of Ends interface of fluid element is in parallel to be electrically connected, and this group Same Name of Ends interface parallel connection is by fixing " mountain " font joint parallel connection Be electrically connected; To directly connect electric energy meter voltage element fire-wire interfaces from power supply A, B, three leads of C three couplings, again from electricity The voltage component zero line interface that can show connects with a lead, passes the voltage hole of three-phase and four-line measuring and monitoring device, until N is electrically connected with zero line.
Measuring and monitoring device supply unit (7), in three-phase and four-line measuring and monitoring device internal electric source device, external three-phase alternating current The source is unified into the V/V connection with two power transformers, higher three-phase voltage is converted to lower three-phase voltage, through three After the phase bridge rectifier is rectified into direct current, toward big capacity energy storage capacitor charging accumulation of energy, by big capacity energy storage capacitor The air supply switch electric energy that all trips, the power of power transformer only satisfy big capacity energy storage capacitor charging and metering prison The electricity consumption of control device load.
Embodiment
In the embodiment shown in Figure 2, switch (K) end in the three-phase and four-line measuring and monitoring device (2) connects three-phase four-wire power (1) A, B, the C phase, the other end passes current transformer (3) (LHa respectively, LHb, LHc) link to each other with user load (4), zero line N draws from three-phase four-wire power (1), passing current transformer (LHn) directly links to each other with user load (4), three-phase and four-line electric energy meter (5) by electric energy metrical connect lead (6) respectively with three-phase four-wire power (1) A, B, C, N line summation current transformer (3) (LHa, LHb, LHc, LHn) secondary side connects, wherein the voltage component zero line interface of three-phase and four-line electric energy meter (5) connects the voltage hole (LHy) that lead passes three-phase and four-line measuring and monitoring device (2) and joins with zero line N, one group of the current element of three-phase and four-line electric energy meter (5) goes out line interface behind " mountain " font line parallel, it connects current aperture (LH1) and current transformer (3) (LHa that lead passes three-phase and four-line measuring and monitoring device (2), LHb, LHc) go out the line interface parallel connection, the positive pole of the electric capacity (C18) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive pole of the diode (D17) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D29) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive pole of the electric capacity (C11) of three-phase and four-line measuring and monitoring device (2), the positive pole of the diode (D16) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the output terminal of the operational amplifier (IC2-2) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D34) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the input end of the operational amplifier (IC2-1) of three-phase and four-line measuring and monitoring device (2), resistance (R1 in the three-phase and four-line measuring and monitoring device (2), R2, R3) connect three-phase four-wire power (1) A respectively, B, the C phase, power transformer (B1 in the measuring and monitoring device supply unit (7), B2) connect three-phase four-wire power (1) A respectively, B, C phase, the DC voltage of its output supply with three-phase and four-line measuring and monitoring device (2) respectively and measuring and monitoring device disconnection monitoring device (8) uses.When three-phase and four-line electric energy meter (5) when normally measuring, pass three-phase and four-line measuring and monitoring device (2) voltage hole (LHy) electric current 1/1000 the peace the order of magnitude, the electric current sum of passing the current aperture (LH1) of three-phase and four-line measuring and monitoring device (2) equals zero, switch (K) in the three-phase and four-line measuring and monitoring device (2) is in closing position, the normal electricity consumption of user; After the voltage circuit of electric energy meter metering is broken live wire by the people from the somewhere, the electric current of the order of magnitude of one 1/100 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), differentiate through three-phase and four-line measuring and monitoring device (2), promote its switch (K) tripping operation; After electric energy meter voltage element zero line interface connection lead is broken from the somewhere by the people, the electric current that passes the voltage hole (LHy) of three-phase and four-line measuring and monitoring device (2) equals zero, after measuring and monitoring device disconnection monitoring device (8) identification, promote switch (K) tripping operation of three-phase and four-line measuring and monitoring device (2); When external electric source outage of the present utility model, the electric current of the order of magnitude of one 1/100 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), the resistance (R1, R2, R3) of three-phase and four-line measuring and monitoring device (2) lacks a phase voltage simultaneously, differentiate through three-phase and four-line measuring and monitoring device (2), after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; After the disconnected phase line of the electrical network of external power source of the present utility model higher electric pressure than 400V/230V voltage, the electric current of the order of magnitude of one 1/10000 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), resistance (the R1 of while three-phase and four-line measuring and monitoring device (2), R2, R3) three-phase voltage on becomes the single-phase voltage of a series connection, differentiate through three-phase and four-line measuring and monitoring device (2) and measuring and monitoring device disconnection monitoring device (8), after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; When the people changes polarity, the no-load voltage ratio of certain a few current transformer of current transformer (3) (LHa, LHb, LHc, LHn), passing equation ia+ib+ic-in ≠ 0 of electric current of the current aperture (LH1) of three-phase and four-line measuring and monitoring device (2) just sets up, after three-phase and four-line measuring and monitoring device (2) is differentiated, promote its switch (K) tripping operation; As the people in outside of the present utility model, when walking around the utility model certain phase line being done jumper and carried out stealing, passing equation ia+ib+ic-in ≠ 0 of electric current of the current aperture (LH1) of three-phase and four-line measuring and monitoring device (2) also sets up, after three-phase and four-line measuring and monitoring device (2) is differentiated, promote its switch (K) tripping operation.
In another embodiment shown in Figure 3, switch (K) end in the three-phase and four-line measuring and monitoring device (2) connects three-phase four-wire power (1) A, B, the C phase, the other end is connected to the live wire incoming line of three-phase and four-line electric energy meter (5), its live wire line outlet outlet is passed current transformer (3) with the zero line N that draws and (LHn) is linked to each other with user load (4) from three-phase four-wire power (1), the voltage hole (LHy) that the voltage component zero line interface connection lead of three-phase and four-line electric energy meter (5) passes three-phase and four-line measuring and monitoring device (2) joins with zero line N, current transformer (3) secondary side one end (LHn) connects lead and passes the other end that current aperture (LH1) in the three-phase and four-line measuring and monitoring device (2) is connected to its secondary side, the positive pole of the electric capacity (C18) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive pole of the diode (D17) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D29) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive pole of the electric capacity (C11) of three-phase and four-line measuring and monitoring device (2), the positive pole of the diode (D16) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the output terminal of the operational amplifier (IC2-2) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D34) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the inverting input of the operational amplifier (IC2-1) of three-phase and four-line measuring and monitoring device (2), resistance (R1 in the three-phase and four-line measuring and monitoring device (2), R2, R3) connect three-phase four-wire power (1) A respectively, B, the C phase, power transformer (B1 in the measuring and monitoring device supply unit (7), B2) connect three-phase four-wire power (1) A respectively, B, C phase, the DC voltage of its output supply with three-phase and four-line measuring and monitoring device (2) respectively and measuring and monitoring device disconnection monitoring device (8) uses.After the voltage circuit of electric energy meter metering is broken live wire by the people from the somewhere, the electric current of the order of magnitude of one 1/100 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), differentiate through three-phase and four-line measuring and monitoring device (2), promote its switch (K) tripping operation; After electric energy meter voltage element zero line interface connection lead is broken from the somewhere by the people, the electric current that passes the voltage hole (LHy) of three-phase and four-line measuring and monitoring device (2) equals zero, after measuring and monitoring device disconnection monitoring device (8) is differentiated, promote switch (K) tripping operation of three-phase and four-line measuring and monitoring device (2); When external electric source outage of the present utility model, the electric current of the order of magnitude of one 1/100 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), the resistance (R1, R2, R3) of three-phase and four-line measuring and monitoring device (2) lacks a phase voltage simultaneously, differentiate through three-phase and four-line measuring and monitoring device (2), after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; After the disconnected phase line of the electrical network of external power source of the present utility model higher electric pressure than 400V/230V voltage, the electric current of the order of magnitude of one 1/10000 peace appears in the voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2), resistance (the R1 of while three-phase and four-line measuring and monitoring device (2), R2, R3) three-phase voltage on becomes the single-phase voltage of a series connection, differentiate through three-phase and four-line measuring and monitoring device (2) and measuring and monitoring device disconnection monitoring device (8), after not influencing the correctness of electric energy meter metering, allow the user to continue electricity consumption, its switch (K) does not trip; As the people in outside of the present utility model, when walking around the utility model certain phase line being done jumper and carried out stealing, the equation ia+ib+ic-in ≠ 0 of electric current that passes the current aperture (LH1) of three-phase and four-line measuring and monitoring device (2) sets up, after three-phase and four-line measuring and monitoring device (2) is differentiated, promote its switch (K) tripping operation.
Claims (6)
1, a kind of monitoring measuring apparatus, in metal shell, watch-dog, electric energy meter, current transformer be connected lead and be electrically connected, it is characterized in that: switch (K) end in the three-phase and four-line measuring and monitoring device (2) is electrically connected three-phase four-wire power (1) A, B, the C phase, the other end passes current transformer (3) and is electrically connected with user load (4), zero line (N) is drawn from three-phase four-wire power (1), passing current transformer (3) is electrically connected with user load (4), three-phase and four-line electric energy meter (5) by electric energy metrical connect lead (6) through three-phase and four-line measuring and monitoring device (2) respectively with three-phase four-wire power (1) (A, B, C, N) line summation current transformer (3) (LHa, LHb, LHc, LHn) be electrically connected, the positive pole of the electric capacity (C18) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive electrical of the diode (D17) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D29) in the measuring and monitoring device disconnection monitoring device (8) links to each other with the positive electrical of the electric capacity (C11) of three-phase and four-line measuring and monitoring device (2), the positive pole of the diode (D16) in the measuring and monitoring device disconnection monitoring device (8) is electrically connected with the output terminal of the operational amplifier (IC2-2) of three-phase and four-line measuring and monitoring device (2), the negative pole of the diode (D34) in the measuring and monitoring device disconnection monitoring device (8) is electrically connected with the input end of the operational amplifier (IC2-1) of three-phase and four-line measuring and monitoring device (2), resistance (R1 in the three-phase and four-line measuring and monitoring device (2), R2, R3) connect three-phase four-wire power (1) A respectively, B, the C phase, the power transformer (B1 in the measuring and monitoring device supply unit (7), B2) connect three-phase four-wire power (1) A respectively, B, the C phase.
2, monitoring measuring apparatus according to claim 1, it is characterized in that: the connection lead on the voltage component zero line interface of three-phase and four-line electric energy meter (5), its voltage hole (LHy) of passing three-phase and four-line measuring and monitoring device (2) is electrically connected with the zero line (N) of three-phase four-wire power (1).
3, monitoring measuring apparatus according to claim 1, it is characterized in that: one group of the current element of three-phase and four-line electric energy meter (5) goes out line interface through the parallel connection of " mountain " font lead, connect lead at itself and tie-point place, it connects the current aperture (LHl) that lead passes three-phase and four-line measuring and monitoring device (2), with current transformer (3) (LHa, LHb, LHc) the end interface parallel connection of the same name of secondary side, current transformer (3) is the lead of the leading-out terminal connection outer layer insulation of secondary side (LHn), the current aperture (LHl) of passing three-phase and four-line measuring and monitoring device (2) with preceding connection lead, then separately with current transformer (3) (LHn) another leading-out terminal of secondary side be electrically connected.
4, monitoring measuring apparatus according to claim 1, it is characterized in that: current transformer (3) (LHn) leading-out terminal of secondary side connects the lead of outer layer insulation, and the current aperture (LHl) of passing three-phase and four-line measuring and monitoring device (2) separately and current transformer (3) (LHn) another leading-out terminal of secondary side are electrically connected.
5, monitoring measuring apparatus according to claim 1, it is characterized in that: draw phase line (A, B, C) from three-phase four-wire power (1) and be connected lead, pass current transformer (3) (LHa, LHb, LHc, LHn) respectively and be electrically connected with user load (4) with zero line (N).
6, monitoring measuring apparatus according to claim 1, it is characterized in that: draw phase line (A, B, C) from three-phase four-wire power (1) and be connected lead with zero line (N), directly behind three-phase and four-line electric energy meter (5), pass current transformer (3) jointly and (LHn) be electrically connected with user load (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420068995 CN2802513Y (en) | 2004-10-20 | 2004-10-20 | Monitoring metering installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420068995 CN2802513Y (en) | 2004-10-20 | 2004-10-20 | Monitoring metering installation |
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| Publication Number | Publication Date |
|---|---|
| CN2802513Y true CN2802513Y (en) | 2006-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420068995 Expired - Fee Related CN2802513Y (en) | 2004-10-20 | 2004-10-20 | Monitoring metering installation |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259381A (en) * | 2015-10-28 | 2016-01-20 | 江苏省电力公司常州供电公司 | Portable active electric energy metering device |
| CN106772212A (en) * | 2017-04-06 | 2017-05-31 | 马斌 | The unloaded metering of electric energy meter patrols and examines tester online |
| CN109507628A (en) * | 2018-10-19 | 2019-03-22 | 深圳供电局有限公司 | Reverse polarity fault monitoring method and device based on three-phase four-wire meter equipment |
| CN112234548A (en) * | 2020-09-09 | 2021-01-15 | 国网浙江海盐县供电有限公司 | Improved metering junction box |
| CN113777535A (en) * | 2021-09-13 | 2021-12-10 | 南方电网数字电网研究院有限公司 | Current transformer polarity checking method and device, computer equipment and storage medium |
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2004
- 2004-10-20 CN CN 200420068995 patent/CN2802513Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105259381A (en) * | 2015-10-28 | 2016-01-20 | 江苏省电力公司常州供电公司 | Portable active electric energy metering device |
| CN105259381B (en) * | 2015-10-28 | 2017-05-10 | 江苏省电力公司常州供电公司 | Portable active electric energy metering device |
| CN106772212A (en) * | 2017-04-06 | 2017-05-31 | 马斌 | The unloaded metering of electric energy meter patrols and examines tester online |
| CN106772212B (en) * | 2017-04-06 | 2023-10-27 | 太原山互科技有限公司 | No-load metering on-line inspection tester for electric energy meter |
| CN109507628A (en) * | 2018-10-19 | 2019-03-22 | 深圳供电局有限公司 | Reverse polarity fault monitoring method and device based on three-phase four-wire meter equipment |
| CN109507628B (en) * | 2018-10-19 | 2021-01-29 | 深圳供电局有限公司 | Reverse polarity fault monitoring method and device based on three-phase four-wire meter equipment |
| CN112234548A (en) * | 2020-09-09 | 2021-01-15 | 国网浙江海盐县供电有限公司 | Improved metering junction box |
| CN113777535A (en) * | 2021-09-13 | 2021-12-10 | 南方电网数字电网研究院有限公司 | Current transformer polarity checking method and device, computer equipment and storage medium |
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