CN202886592U - Virtual load device of single-phase electric energy meter - Google Patents
Virtual load device of single-phase electric energy meter Download PDFInfo
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- CN202886592U CN202886592U CN 201220606775 CN201220606775U CN202886592U CN 202886592 U CN202886592 U CN 202886592U CN 201220606775 CN201220606775 CN 201220606775 CN 201220606775 U CN201220606775 U CN 201220606775U CN 202886592 U CN202886592 U CN 202886592U
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Abstract
本实用新型公开了一种单相电能表虚拟负载装置，所述装置的第一个接线端接单刀双掷开关S1的动端，单刀双掷开关S1的一个不动端经电阻R2与负载线圈T初级的一端连接，电阻R1与指示灯L1串联后与电阻R2并联，单刀双掷开关S1的另一个不动端经电阻R3后与所述负载线圈T初级的一端连接，电阻R4与指示灯L2串联后与电阻R3并联，所述装置的第二个接线端为负载线圈T初级的另一端，所述负载线圈T初级的另一端与负载线圈T次级的一端连接，所述装置的第三个接线端经保险FU1与负载线圈T次级的另一端连接。所述装置能够提供虚拟负载并具有体积小，重量轻，使用方便的特点。
The utility model discloses a virtual load device for a single-phase electric energy meter. The first terminal of the device is connected to the moving end of a single-pole double-throw switch S1, and a fixed end of the single-pole double-throw switch S1 is connected to the load through a resistor R2. The primary end of the coil T is connected, the resistor R1 is connected in series with the indicator light L1 and then connected in parallel with the resistor R2, the other fixed end of the SPDT switch S1 is connected to the primary end of the load coil T after passing through the resistor R3, and the resistor R4 is connected to the indicator The lamp L2 is connected in series with the resistor R3 in parallel. The second terminal of the device is the other end of the primary end of the load coil T, and the other end of the primary end of the load coil T is connected to one end of the secondary end of the load coil T. The third terminal is connected to the other end of the secondary side of the load coil T through the insurance FU1. The device can provide dummy load and has the characteristics of small size, light weight and convenient use.
Description
Technical field
The utility model relates to measurement and the calibrating installation technical field of instrument, relates in particular to a kind of single-phase electric energy meter dummy load device.
Background technology
Low-voltage metering mechanism (single-phase meter, three-phase meter) is widely used in industrial user and resident, and therefore, for the normal use of assurance device, the verification of his-and-hers watches meter must regularly be carried out.Mainly undertaken by the method for checking at the measuring apparatus checking table behind the measurement meter that has a power failure, takes at present, install after having checked again, the user could normal electricity consumption after installing.Because customer volume is more, rural area especially, actual workload is large especially, also has a strong impact on the normal electricity consumption of user, is not suitable for large batch of verification.In actual checking procedure, the necessary actual loading of field-checking if load is too little, brings measuring error bigger than normal, and is non-loaded, again can't the verification electric energy meter error.Traditional method is that by the time load is carried out verification when reaching certain value again, but the time be difficult to hold, perhaps add the electric furnace load box, but its volume is large, weight is large, should not carry, heating is serious, electric energy loss is large.Therefore, need a kind of portable, for situ metrology equipment can provide the device of dummy load under low load or light condition, scene table meter verification in batches can be carried out fast.
The utility model content
Technical problem to be solved in the utility model provides a kind of single-phase electric energy meter dummy load device, and described device can provide dummy load and have little, lightweight, the easy to use characteristics of volume.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: 1, a kind of single-phase electric energy meter dummy load device, the moved end that it is characterized in that first terminals order double-pole double throw switch S1 of described device, one of single-pole double-throw switch (SPDT) S1 not the moved end be connected through the elementary end of resistance R 2 and loading coil T, another of single-pole double-throw switch (SPDT) S1 not moved end is connected with the elementary end of described loading coil T after resistance R 3, second terminals of described device are the elementary other end of loading coil T, one end of T the level of the other end and loading coil that described loading coil T is elementary is connected, and the 3rd terminals of described device are connected through the other end of T level of insurance FU1 and loading coil.
Preferably: in parallel with resistance R 2 after resistance R 1 is connected with pilot lamp L1.
Preferably: in parallel with resistance R 3 after resistance R 4 is connected with pilot lamp L2.
The beneficial effect that adopts technique scheme to produce is: described device includes only several electronic components, do not have to provide dummy load by the resistance in it in the very little situation of load or load at single-phase electric energy meter, and working load coil amplified current, it is little to have volume, lightweight, easy to use characteristics.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is circuit theory diagrams of the present utility model;
Fig. 2 is connection principle block diagram of the present utility model.
Embodiment
As shown in Figure 1, a kind of single-phase electric energy meter dummy load device, the moved end of first terminals order double-pole double throw switch S1 of described device, one of single-pole double-throw switch (SPDT) S1 not the moved end be connected through the elementary end of resistance R 2 and loading coil T, it is in parallel with resistance R 2 after resistance R 1 is connected with pilot lamp L1, another of single-pole double-throw switch (SPDT) S1 not moved end is connected with the elementary end of described loading coil T after resistance R 3, it is in parallel with resistance R 3 after resistance R 4 is connected with pilot lamp L2, second terminals of described device are the elementary other end of loading coil T, one end of T the level of the other end and loading coil that described loading coil T is elementary is connected, and the 3rd terminals of described device are connected through the other end of T level of insurance FU1 and loading coil.Single-pole double-throw switch (SPDT) S1 is the power switch of described device, is divided into three shelves, I shelves, 0 grade and II shelves.
Using method: 1, described installation's power source switch is adjusted to 0 grade, make it to be in closed condition.2, device is carried out wiring.That described device is furnished with is red, green, black three p-wires, be respectively pressure-wire, load line and zero line, first terminals of same described device are set to redness, second terminals is set to green, the 3rd terminals are set to black, with three terminals of three lines by the corresponding difference of color insertion apparatus.3, will install with tested single-phase electric energy meter and connect, specifically as shown in Figure 2.That the other end of p-wire has respectively is red, green, black three clips, first the black clip is clipped on the zero terminal of single-phase electric energy meter, then red clip is clipped on the voltage terminal of single-phase electric energy meter, at last green clip is clipped on the electric current outlet terminal of single-phase electric energy meter, wiring this moment is complete.4, start makes device in running order.The power switch of device for opening, when power switch was transferred to the I shelves, pilot lamp L1 was bright, and the electric current that this timer provides is 5A; When switch was transferred to the II shelves, pilot lamp L2 was bright, and the electric current that this timer provides is 10A; When power switch was transferred to the centre position, namely 0 grade, device was in off-mode, and this timer does not provide electric current.5, the electric current that provides of use device can carry out verification to single-phase electric energy meter with single-phase electric energy meter on-site calibrator.6, verification is complete, shutdown.The installation's power source switch is transferred to 0 grade make it to be in off-mode.7, take out stitches.During line on the singulated phase electric energy meter, at first green clip is pulled down from the electric current outlet terminal of single-phase electric energy meter, then red terminal is pulled down from the voltage terminal of single-phase electric energy meter, at last the black clip is pulled down from the zero terminal of single-phase electric energy meter.
Shown in Fig. 2, carry out wiring, wherein L represents live wire, and N represents zero line, on the electric current outlet terminal of the 3rd terminals order phase electric energy meter of described device, be the 2nd terminal of binding post, the live wire of single-phase electric energy meter goes out through the secondary of loading coil T and zero line N formation loop like this.When power switch is closed, the elementary of loading coil T has electric current to flow through, this electric current is very little, but through electromagnetic induction, can produce very large electric current the secondary of loading coil T, generally between 5A-10A, in the current transformer of single-phase meter, just have so onesize electric current, single-phase electric energy meter will rotate after detecting this electric current, calculates electric energy.At this moment adopt special-purpose single-phase electric energy meter on-site calibrator just can measure the error of single-phase electric energy meter.Note electric current I=I1+I2 here, wherein I1 is user's actual current; I2 is virtual current, and I2 can not cause large impact to electrical network.
Used specific case herein principle of the present utility model and embodiment thereof are set forth, the explanation of above embodiment is just with helping understand method of the present utility model and core concept thereof.Should be pointed out that for the person of ordinary skill of the art, can also carry out some improvement and modification to the utility model under the prerequisite that does not break away from the utility model principle, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (3)
1. single-phase electric energy meter dummy load device, the moved end that it is characterized in that first terminals order double-pole double throw switch S1 of described device, one of single-pole double-throw switch (SPDT) S1 not the moved end be connected through the elementary end of resistance R 2 and loading coil T, another of single-pole double-throw switch (SPDT) S1 not moved end is connected with the elementary end of described loading coil T after resistance R 3, second terminals of described device are the elementary other end of loading coil T, one end of T the level of the other end and loading coil that described loading coil T is elementary is connected, and the 3rd terminals of described device are connected through the other end of T level of insurance FU1 and loading coil.
2. a kind of single-phase electric energy meter dummy load device according to claim 1 is characterized in that resistance R 1 is in parallel with resistance R 2 after connecting with pilot lamp L1.
3. a kind of single-phase electric energy meter dummy load device according to claim 1 and 2 is characterized in that resistance R 4 is in parallel with resistance R 3 after connecting with pilot lamp L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220606775 CN202886592U (en) | 2012-11-16 | 2012-11-16 | Virtual load device of single-phase electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220606775 CN202886592U (en) | 2012-11-16 | 2012-11-16 | Virtual load device of single-phase electric energy meter |
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| Publication Number | Publication Date |
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| CN202886592U true CN202886592U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220606775 Expired - Fee Related CN202886592U (en) | 2012-11-16 | 2012-11-16 | Virtual load device of single-phase electric energy meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944864A (en) * | 2012-11-16 | 2013-02-27 | 保定供电公司 | Virtual load device of single-phase electric energy meter |
| CN105911514A (en) * | 2016-06-30 | 2016-08-31 | 海盐新跃电器有限公司 | External virtual load device for on-site electric energy calibration |
| CN106066466A (en) * | 2016-06-30 | 2016-11-02 | 海盐新跃电器有限公司 | A kind of electric energy field-checking is with built-in virtual load device |
| CN112147563A (en) * | 2020-08-27 | 2020-12-29 | 国网山西省电力公司阳泉供电公司 | Fault meter tester |
| CN112748389A (en) * | 2019-10-31 | 2021-05-04 | 河南许继仪表有限公司 | On-site intelligent single-phase electric energy meter fault diagnosis instrument |
-
2012
- 2012-11-16 CN CN 201220606775 patent/CN202886592U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944864A (en) * | 2012-11-16 | 2013-02-27 | 保定供电公司 | Virtual load device of single-phase electric energy meter |
| CN105911514A (en) * | 2016-06-30 | 2016-08-31 | 海盐新跃电器有限公司 | External virtual load device for on-site electric energy calibration |
| CN106066466A (en) * | 2016-06-30 | 2016-11-02 | 海盐新跃电器有限公司 | A kind of electric energy field-checking is with built-in virtual load device |
| CN112748389A (en) * | 2019-10-31 | 2021-05-04 | 河南许继仪表有限公司 | On-site intelligent single-phase electric energy meter fault diagnosis instrument |
| CN112147563A (en) * | 2020-08-27 | 2020-12-29 | 国网山西省电力公司阳泉供电公司 | Fault meter tester |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID HEBEI ELECTRIC POWER COMPANY BAODING PO Effective date: 20131018 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: BAODING POWER SUPPLY COMPANY Effective date: 20131018 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 071000 BAODING, HEBEI PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131018 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: State Grid Hebei Electric Power Company Patentee after: Baoding Power Supply Branch Company, State Grid Hebei Electric Power Company Address before: 071000 No. 138 sunny north street, Hebei, Baoding Patentee before: Baoding Power Supply Company |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20171116 |
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| CF01 | Termination of patent right due to non-payment of annual fee |