CN202210109U - Metering box capable of electrically replacing electric meter and current transformer - Google Patents
Metering box capable of electrically replacing electric meter and current transformer Download PDFInfo
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- CN202210109U CN202210109U CN2011202975648U CN201120297564U CN202210109U CN 202210109 U CN202210109 U CN 202210109U CN 2011202975648 U CN2011202975648 U CN 2011202975648U CN 201120297564 U CN201120297564 U CN 201120297564U CN 202210109 U CN202210109 U CN 202210109U
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Abstract
A metering box capable of electrically replacing electric meters and current transformers is provided. A K1 tap, a K2 tap and a K3 tap of an A phase line current transformer are respectively connected with one ends of terminals (1, 2, 3) of a terminal row, a K1 tap, a K2 tap and a K3 tap of a B phase line current transformer are respectively connected with one ends of terminals of (6, 7, 8) of the terminal row, a K1 tap, a K2 tap and a K3 tap of a C phase line current transformer are respectively connected with one ends of terminals of terminals of (11, 12, 13) of the terminal row, terminals (5, 9, 14) of the terminal row are connected with a zero line N, terminals (1,2,3,4) of an A phase electric meter are respectively connected with the other ends of the terminals (1,2,4,5) of the terminal row, terminals (1,2,3,4) of a B phase electric meter are respectively connected with the other ends of the terminals (6,7,9,10) of the terminal row, terminals (1,2,3,4) of a C phase electric meter are respectively connected with the other ends of the terminals (11,12,14,15) of the terminal row, and three taps of a low voltage capacitance compensator are connected with an A phase line, a B phase line and a C phase line.
Description
Technical field
The utility model relates to a kind of electrical energy metering tank, but especially a kind of batch meter of charged for replacement watt-hour meter summation current transformer.
Background technology
At present, in the middle of China's rural area low-voltage distribution transformer, what adopt basically is that three direct access methods of single-phase watt-hour meter of three-phase four-wire system and three single-phase watt-hour meters of three-phase four-wire system are through two kinds of wiring of the direct access method of current transformer; In a single day watt-hour meter summation current transformer fault appears in these two kinds of wiring; The accuracy and the correctness of the metering of capital influence table meter, charge makes troubles to power supply department, and; All cumbersome aspect construction; It is wide to have a power failure, and power off time is long, also can cause unnecessary economic loss to power supply department.Therefore, but the design a kind of charged for replacement watt-hour meter summation current transformer batch meter, be the present technical issues that need to address.
Summary of the invention
But the utility model technical matters to be solved provides a kind of batch meter of charged for replacement watt-hour meter summation current transformer.
The technical scheme that the utility model solves its technical matters is:
But a kind of batch meter of charged for replacement watt-hour meter summation current transformer; Comprise casing, chamber door and door lock; Both sides at casing are provided with entrance hole; At the casing internal fixation A phase watt-hour meter, B phase watt-hour meter and C watt-hour meter is mutually arranged; In casing, also be fixed with a terminal row and three current transformers; The A phase line of three-phase four-wire system, B phase line, C phase line and zero line N draw from the entrance hole of casing opposite side from the entrance hole entering casing of casing one side, and through different current transformers, described current transformer is the transformation ratio current transformer of three taps respectively for A phase line, B phase line and C phase line; Three taps of current transformer are respectively K1, K2 and K3; Wherein the K1 of the current transformer of A phase line, K2 and K3 tap difference connecting terminal are arranged an end of 1,2 and 3 terminals, and the K1 of the current transformer of B phase line, K2 and K3 tap be an end of connecting terminal row 6,7 and 8 terminals respectively, and the K1 of the current transformer of C phase line, K2 and K3 tap difference connecting terminal are arranged an end of 11,12 and 13 terminals; 5,9 and 14 terminal connecting to neutral line N of terminal row; 1,2,3 and 4 terminals of A phase watt-hour meter are the other end of connecting terminal row's 1,2,4 and 5 terminals respectively, and 1,2,3 and 4 terminals of B phase watt-hour meter are the other end of connecting terminal row's 6,7,9 and 10 terminals respectively, and 1,2,3 and 4 terminals of C phase watt-hour meter are the other end of connecting terminal row's 11,12,14 and 15 terminals respectively; In casing, also be provided with the low-voltage capacitance compensating device, three joints of low-voltage capacitance compensating device are connected with A phase line, B phase line and C phase line through the different contacts of capacitor switch respectively.Low-voltage capacitance compensating device model: BSMJ0.4-6-3, rated capacity: 6kvar, rated capacity: 119.4uf; Rated voltage: 0.4kV, rated current: 8.6, wiring group: triangle; Producer: Dexia Group, put resistance and superpotential isolator in the capacitor.Can carry out reactive-load compensation to low pressure at any time, improve the utilization of equipment greatly.
Preferably; In casing, also be fixed with A phase current table, B phase current table, C phase current table, A phase voltage table, B phase voltage table and C phase voltage table; 1 terminal that A phase current table is connected on terminal row and A are mutually on the line of 1 terminal of watt-hour meter; 6 terminals that B phase current table is connected on terminal row and B be mutually on the line of 1 terminal of watt-hour meter, and on the line of 1 terminal of watt-hour meter, A phase voltage table is connected in parallel between 3 terminals and 4 terminals of A phase watt-hour meter mutually for 11 terminals that C phase current table is connected on terminal row and C; B phase voltage table is connected in parallel between 3 terminals and 4 terminals of B phase watt-hour meter, and C phase voltage table is connected in parallel between 3 terminals and 4 terminals of C phase watt-hour meter.
Further preferably, in casing, be provided with illuminating lamp, illuminating lamp is connected between zero line N and A phase line, B phase line or the C phase line, and the line between A phase line, B phase line or C phase line and the illuminating lamp is provided with luminous lamp switch.Again further preferably, described luminous lamp switch is for breaking the formula pushbutton switch, and the formula pushbutton switch of breaking is arranged on the junction of casing and chamber door, and switch breaks off when chamber door is closed, switch closure when chamber door is opened.
Replacing method: during like replacing A phase current mutual inductor no-load voltage ratio, only need A phase secondary current terminal 1,2,3 terminal short circuits, just the inaccurate open circuit of current transformer; At this moment, secondary current line no current passes through, not entail dangers to staff personal safety; Simultaneously voltage terminal 4,5 plug-in fuses are taken off deenergization; Will burn instrument and consumer in case that is to say the inaccurate short circuit voltage short circuit of voltage, at this moment, secondary voltage line no-voltage passes through; Also not entail dangers to staff personal safety gets final product current watt-hour meter connection terminal 2 reconfigurations to current terminal 3.
As when changing A phase watt-hour meter, only need with A phase secondary current terminal 1,2,3 terminal short circuits, at this moment; Secondary current line no current passes through, and not entail dangers to staff personal safety is taken off deenergization with voltage terminal 4,5 plug-in fuses simultaneously; That is to say that voltage forbidden short circuit, in case the voltage short circuit will be burnt instrument and consumer, at this moment; Secondary voltage line no-voltage passes through, and old watt-hour meter 1,2,3,4 terminals are unloaded, and changes new watt-hour meter and gets final product.
In kind replaceable B phase, C phase current mutual inductor and watt-hour meter.
Compared with prior art, the utlity model has following advantage:
1. change current transformer ratio and need not change the lead number of turn one time, both made things convenient for, again saving of work and time.
Need not have a power failure when 2. changing watt-hour meter, but hot line job was both convenient, again saving of work and time.
3. reometer can be observed the current balance type situation of distribution transforming three phase windings, can avoid three-phase current unbalance to cause a certain phase winding electric current higher and burn the high pressure winding, carries out the adjustment of low-pressure side load at any time, to examination distribution transforming economical operation reliable basis is provided.
4. voltage table can be observed distribution transforming three-phase voltage indication situation, can carry out the tap adjustment at any time, and (back has a power failure) provides reliable basis to the examination rate of qualified voltage, also can judge once whether insurance fuses or strike sparks according to voltage table beat of pointer situation.
5. the watt-hour meter back panel wiring adopts current return, voltage circuit two parts, and accident point is few, also avoids electricity filching person off voltage envelope to collude simultaneously and carries out electricity filching behavior.
6. measure the chamber door place one microswitch K is installed, door is turned on light just bright, and door is turned off the light and extinguished, and it is emergent and make an inspection tour effect such as souvenir also to can be used to night.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model.
Fig. 2 is the circuit theory diagrams of the utility model.
Fig. 3 is the circuit theory diagrams of prior art.
Embodiment
But a kind of batch meter of charged for replacement watt-hour meter summation current transformer; Comprise casing, chamber door and door lock; Both sides at casing are provided with entrance hole; At the casing internal fixation A phase watt-hour meter wha, B phase watt-hour meter whb and C watt-hour meter whc is mutually arranged; In casing, also be fixed with a terminal row and three current transformers; The A phase line of three-phase four-wire system, B phase line, C phase line and zero line N draw from the entrance hole of casing opposite side from the entrance hole entering casing of casing one side, and through different current transformers, described current transformer is the transformation ratio current transformer of three taps respectively for A phase line, B phase line and C phase line; Three taps of current transformer are respectively K1, K2 and K3; Wherein the K1 of the current transformer of A phase line, K2 and K3 tap difference connecting terminal are arranged an end of 1,2 and 3 terminals, and the K1 of the current transformer of B phase line, K2 and K3 tap be an end of connecting terminal row 6,7 and 8 terminals respectively, and the K1 of the current transformer of C phase line, K2 and K3 tap difference connecting terminal are arranged an end of 11,12 and 13 terminals; 5,9 and 14 terminal connecting to neutral line N of terminal row; 1,2,3 and 4 terminals of A phase watt-hour meter wha are the other end of connecting terminal row's 1,2,4 and 5 terminals respectively, and 1,2,3 and 4 terminals of B phase watt-hour meter whb are the other end of connecting terminal row's 6,7,9 and 10 terminals respectively, and 1,2,3 and 4 terminals of C phase watt-hour meter whc are the other end of connecting terminal row's 11,12,14 and 15 terminals respectively; In casing, also be provided with the low-voltage capacitance compensating device, three joints of low-voltage capacitance compensating device are connected with A phase line, B phase line and C phase line through the different contacts of capacitor switch respectively.
In casing, also be fixed with A phase current Table I a, B phase current Table I b, C phase current Table I c, A phase voltage Table V a, B phase voltage Table V b and C phase voltage Table V c; 1 terminal that A phase current Table I a is connected on terminal row and A are mutually on the line of 1 terminal of watt-hour meter wha; 6 terminals that B phase current Table I b is connected on terminal row and B are mutually on the line of 1 terminal of watt-hour meter whb; 11 terminals that C phase current Table I c is connected on terminal row and C are mutually on the line of 1 terminal of watt-hour meter whc; A phase voltage Table V a is connected in parallel between 3 terminals and 4 terminals of A phase watt-hour meter wha; B phase voltage Table V b is connected in parallel between 3 terminals and 4 terminals of B phase watt-hour meter whb, and C phase voltage Table V c is connected in parallel between 3 terminals and 4 terminals of C phase watt-hour meter whc.
In casing, be provided with illuminating lamp, illuminating lamp is connected between zero line N and A phase line, B phase line or the C phase line, and the line between A phase line, B phase line or C phase line and the illuminating lamp is provided with luminous lamp switch.
Described luminous lamp switch is for breaking the formula pushbutton switch, and the formula pushbutton switch of breaking is arranged on the junction of casing and chamber door, and switch breaks off when chamber door is closed, switch closure when chamber door is opened.
Claims (4)
1. but the batch meter of a charged for replacement watt-hour meter summation current transformer; Comprise casing, chamber door and door lock; Both sides at casing are provided with entrance hole; At the casing internal fixation A phase watt-hour meter (wha), B phase watt-hour meter (whb) and C watt-hour meter (whc) is mutually arranged; In casing, also be fixed with a terminal row and three current transformers; The A phase line of three-phase four-wire system, B phase line, C phase line and zero line N draw from the entrance hole of casing opposite side from the entrance hole entering casing of casing one side, and through different current transformers, it is characterized in that: described current transformer is the transformation ratio current transformer of three taps respectively for A phase line, B phase line and C phase line; Three taps of current transformer are respectively K1, K2 and K3; Wherein the K1 of the current transformer of A phase line, K2 and K3 tap difference connecting terminal are arranged an end of 1,2 and 3 terminals, and the K1 of the current transformer of B phase line, K2 and K3 tap be an end of connecting terminal row 6,7 and 8 terminals respectively, and the K1 of the current transformer of C phase line, K2 and K3 tap difference connecting terminal are arranged an end of 11,12 and 13 terminals; 5,9 and 14 terminal connecting to neutral line N of terminal row; 1,2,3 and 4 terminals of A phase watt-hour meter (wha) are the other end of connecting terminal row's 1,2,4 and 5 terminals respectively, and 1,2,3 and 4 terminals of B phase watt-hour meter (whb) are the other end of connecting terminal row's 6,7,9 and 10 terminals respectively, and 1,2,3 and 4 terminals of C phase watt-hour meter (whc) are the other end of connecting terminal row's 11,12,14 and 15 terminals respectively; In casing, also be provided with the low-voltage capacitance compensating device, three joints of low-voltage capacitance compensating device are connected with A phase line, B phase line and C phase line through the different contacts of capacitor switch respectively.
2. but the batch meter of a kind of charged for replacement watt-hour meter summation current transformer according to claim 1; It is characterized in that: in casing, also be fixed with A phase current table (Ia), B phase current table (Ib), C phase current table (Ic), A phase voltage table (Va), B phase voltage table (Vb) and C phase voltage table (Vc); 1 terminal that A phase current table (Ia) is connected on terminal row and A are mutually on the line of 1 terminal of watt-hour meter (wha); 6 terminals that B phase current table (Ib) is connected on terminal row and B are mutually on the line of 1 terminal of watt-hour meter (whb); 11 terminals that C phase current table (Ic) is connected on terminal row and C are mutually on the line of 1 terminal of watt-hour meter (whc); A phase voltage table (Va) is connected in parallel between 3 terminals and 4 terminals of A phase watt-hour meter (wha); B phase voltage table (Vb) is connected in parallel between 3 terminals and 4 terminals of B phase watt-hour meter (whb), and C phase voltage table (Vc) is connected in parallel between 3 terminals and 4 terminals of C phase watt-hour meter (whc).
3. but the batch meter of a kind of charged for replacement watt-hour meter according to claim 1 and 2; It is characterized in that: in casing, be provided with illuminating lamp; Illuminating lamp is connected between zero line N and A phase line, B phase line or the C phase line, and the line between A phase line, B phase line or C phase line and the illuminating lamp is provided with luminous lamp switch.
4. but the batch meter of a kind of charged for replacement watt-hour meter summation current transformer according to claim 3; It is characterized in that: described luminous lamp switch is for breaking the formula pushbutton switch; The formula pushbutton switch of breaking is arranged on the junction of casing and chamber door; Switch breaks off when chamber door is closed, switch closure when chamber door is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202975648U CN202210109U (en) | 2011-08-16 | 2011-08-16 | Metering box capable of electrically replacing electric meter and current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202975648U CN202210109U (en) | 2011-08-16 | 2011-08-16 | Metering box capable of electrically replacing electric meter and current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202210109U true CN202210109U (en) | 2012-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202975648U Expired - Fee Related CN202210109U (en) | 2011-08-16 | 2011-08-16 | Metering box capable of electrically replacing electric meter and current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202210109U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941083A (en) * | 2014-04-24 | 2014-07-23 | 张泽虎 | Dual-transformation-ratio access type electric energy meter |
| CN104122526A (en) * | 2014-06-24 | 2014-10-29 | 武汉国测恒通智能仪器有限公司 | High voltage electric energy meter with metering unit capable of being charged to replace |
| CN106556722A (en) * | 2016-11-18 | 2017-04-05 | 国网辽宁省电力有限公司锦州供电公司 | Do not have a power failure the method for changing Zhu Biantai areas metering device |
| CN108597825A (en) * | 2018-05-16 | 2018-09-28 | 广东电网有限责任公司 | A kind of metering no-load voltage ratio adjustable low-voltage current transformer device |
| CN109494713A (en) * | 2018-11-05 | 2019-03-19 | 山东钢铁股份有限公司 | The method for replacing electric energy meter |
| CN110726859A (en) * | 2019-10-31 | 2020-01-24 | 国网山东省电力公司济宁供电公司 | Switching device for continuously metering during live replacement of electric energy meter and electric energy meter replacement method |
| CN115800138A (en) * | 2022-11-20 | 2023-03-14 | 贵州电网有限责任公司 | Junction box capable of rapidly replacing electric energy meter and voltage loop on-off method thereof |
-
2011
- 2011-08-16 CN CN2011202975648U patent/CN202210109U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941083A (en) * | 2014-04-24 | 2014-07-23 | 张泽虎 | Dual-transformation-ratio access type electric energy meter |
| CN104122526A (en) * | 2014-06-24 | 2014-10-29 | 武汉国测恒通智能仪器有限公司 | High voltage electric energy meter with metering unit capable of being charged to replace |
| CN106556722A (en) * | 2016-11-18 | 2017-04-05 | 国网辽宁省电力有限公司锦州供电公司 | Do not have a power failure the method for changing Zhu Biantai areas metering device |
| CN106556722B (en) * | 2016-11-18 | 2019-05-07 | 国网辽宁省电力有限公司锦州供电公司 | Do not have a power failure the method for replacing the area Zhu Biantai metering device |
| CN108597825A (en) * | 2018-05-16 | 2018-09-28 | 广东电网有限责任公司 | A kind of metering no-load voltage ratio adjustable low-voltage current transformer device |
| CN109494713A (en) * | 2018-11-05 | 2019-03-19 | 山东钢铁股份有限公司 | The method for replacing electric energy meter |
| CN110726859A (en) * | 2019-10-31 | 2020-01-24 | 国网山东省电力公司济宁供电公司 | Switching device for continuously metering during live replacement of electric energy meter and electric energy meter replacement method |
| CN110726859B (en) * | 2019-10-31 | 2022-01-21 | 国网山东省电力公司济宁供电公司 | Switching device for continuously metering during live replacement of electric energy meter and electric energy meter replacement method |
| CN115800138A (en) * | 2022-11-20 | 2023-03-14 | 贵州电网有限责任公司 | Junction box capable of rapidly replacing electric energy meter and voltage loop on-off method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120502 Termination date: 20120816 |