CN201016997Y - Sensor type high-voltage electrical energy meter - Google Patents
Sensor type high-voltage electrical energy meter Download PDFInfo
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- CN201016997Y CN201016997Y CNU2007200198836U CN200720019883U CN201016997Y CN 201016997 Y CN201016997 Y CN 201016997Y CN U2007200198836 U CNU2007200198836 U CN U2007200198836U CN 200720019883 U CN200720019883 U CN 200720019883U CN 201016997 Y CN201016997 Y CN 201016997Y
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Abstract
A sensor-type high-voltage watt-hour meter belongs to the electric metering field. The watt-hour meter is characterized in that a high-voltage load wire is equipped with an I/i electric current sampling loop, the output end of which is connected with the input end of a watt-hour metering unit, and is equipped with a power device, which consists of An I/P source loop, a rectifier circuit, an energy storage unit and a voltage-stabilizing unit; the output end of the IP source loop is connected with the input end of the rectifier circuit, while the output end of the rectifier circuit is connected with elements of the energy storage unit and an input end of the voltage-stabilizing unit; the output end of the voltage-stabilizing unit is connected with the power end of the watt-hour metering unit. With the metering method of the utility model, the metering result is accurate, the loss is reduced, the cost is saved, and electricity theft is prevented. The watt-hour meter is safe and reliable. Moreover, as the working current is got directly from the loading current, the equipment is simplified and is applicable for electricity metering at the high-voltage side.
Description
Technical field
The utility model relates to and utilizes sensor to carry out the micro-signal sensor type high tension electricity energy gauging table of normalized current, voltage transitions, belongs to the power measurement field.
Background technology
The high-voltage electric energy measurement table is the measurement instrument that is applied in confession, usefulness, power generation process, relates to confession, electricity consumption both sides' economic interests, its justice, just very important, and its application surface is wide in a large number, is indispensable measuring apparatus.At present, the high-voltage electric energy measurement table is generally connected row, low pressure connection lead etc. and is formed by many high-tension current sensors, many high voltage potential transformers, electric energy meter, connection terminal box, high-pressure sides.High voltage potential transformer is transformed into high tension voltage 100V, the 4.64V low voltage voltage of standard; The high-tension current sensor is transformed into low pressure 5A or 1A normalized current to high-voltage great-current; Connect lead access electric energy meter by many and carry out electric energy metrical; The electric current input circuit of existing electric energy meter has been equipped with the copper-manganese shunt resistance, and the 5A input current is split into the current signal of milliampere level or microampere order, just can be input to the electric energy metrical unit; Voltage input signal also will pass through the secondary step-down, just can be input to the electric energy metrical unit and measure.This measuring-signal is through the traditional approach of multistage conversion, have many drawbacks: 1, the error of current sensor, voltage transformer (VT), electric energy meter is measured respectively in the high-voltage electric-energy meter, error after many high-tension current sensors, high voltage potential transformer and electric energy meters make up, and the error that connects lead, contact resistance can not directly measure, and the high-voltage electric energy measurement table composition error after the combination is the composition error of each related elements.Because it is bad that each related elements matches each other, the error characteristics that demonstrate are bad, are prone to leakage quantity calculation during underload.And the error of the artificial generation that subsequent installation produces can not be measured, and electric energy metrical is inaccurate, loses just.2, the mutual inductor output capacity is had relatively high expectations, generally at tens volt-amperes, the normalized current of existing mutual inductor output, when the normal voltage signal is used for electric energy metrical or when measuring, also need further 5A or 1A normalized current be converted to milliampere or the current signal of microampere order, the 100V of standard,
Voltage signal is converted to voltage or little current signal of millivolt level, the process complexity, and power consumption is high; Power consumption is huge during every mutual inductor operation; High-voltage electric-energy meter manufactures and acquires a certain degree of difficulty, and volume is big, deal is heavy, high many mutual inductors of cost promptly will leave safe distance each other, connects with copper bar again, and volume, weight, waste of material are big, and expense height, cost of investment are big.3, because the existence of electromagnetic potential transformer, the interference of factors such as electromagnetic resonance, higher hamonic wave, switching overvoltage can appear in the interference that is subject to various factors in the electrical network, influence the safe operation of voltage transformer (VT), play insurance in the electrical network, burn the PT phenomenon and happen occasionally, influence the power system security economical operation, the accident rate height influences grid supply quality.
Raising along with the distribution automation degree; for improving the requirement of the quality of power supply; microcomputer type protection, measure, conversion equipment high-tension current sensor that metering provides current signal, provide the service condition of high voltage potential transformer of the voltage conversion apparatus of voltage signal that variation has taken place; it does not need tens volt-amperes output capacity; the electric current that does not also need 1A or 5A, 100V,
The output of voltage signal, but if several volt-amperes and mA level or the little current signal of μ A grade standard, the current signal output of millivolt or milliampere level can directly be connected with electric energy computation chip or protection control module, reduce the ampere turns of current transformation process, reduce second open circuit voltage; This with regard to the manufacturing that makes the high-voltage electric-energy meter mutual inductor become simply, material-saving, energy-conservation, can reduce the transfer process of electric current, voltage, reduce probability of failure.Can improve measuring accuracy, more pay attention to metering, measurement, protective value, this creates good development opportunity with regard to the technical progress of giving this kind equipment, and transformation and raising current conversion equipment are imperative.
The utility model content
The technical problems to be solved in the utility model provides a kind of sensor type high tension electricity energy gauging table of measuring accurately, reducing the wastage saving cost, safety and stability.
The technical scheme that its technical matters that solves the utility model adopts is: the sensor type high tension electricity energy gauging table, be included in the V/I/v voltage sampling loop that the high-voltage load lead is provided with, the output terminal in V/I/v voltage sampling loop connects the input end of electric energy metrical unit, the output terminal of electric energy metrical unit connects display, it is characterized in that: I/i current sampling loop is set at the high-voltage load lead, the output terminal in I/i current sampling loop connects the input end of electric energy metrical unit, get resource loop in the setting of high-voltage load lead by I/P, rectification circuit, the supply unit that energy-storage units and voltage regulation unit are formed, I/P gets the input end of the output terminal connection rectification circuit of resource loop, the output terminal of rectification circuit connects the input end of energy-storage travelling wave tube and voltage regulation unit, and the output terminal of voltage regulation unit connects the power end of electric energy metrical unit.
Principle of work is: voltage signal is obtained from the high-voltage load lead in V/I/v voltage sampling loop, input electric energy metrical unit.Current signal is obtained from the high-voltage load lead in I/i current sampling loop, input electric energy metrical unit.I/P gets resource loop and obtains voltage signal from the high-voltage load lead, through supply of electrical energy metering module after rectification circuit arrangement and the voltage regulation unit voltage stabilizing, provides operating voltage Vcc.Need to carry out the high-low pressure isolation processing between high-voltage load lead and the current sensor secondary side, the electric current of collection, voltage signal need electromagnetic screen and electrostatic prevention to handle.The effect of energy-storage travelling wave tube is that the power supply that guarantees whole high-voltage electric energy measurement table keeps normally.
One or two or many miniature current sensors of penetration type are adopted in I/i current sampling loop, and a winding is single turn or punching, and Secondary Winding connects the electric energy metrical unit.
Three-phase and four-line Y-y connection is adopted in I/i current sampling loop, comprises miniature current sensor T1-T3, and the single-turn winding of the primary side of miniature current sensor T1-T3 is the high-voltage load lead, and secondary side connects the input end of electric energy metrical unit.The secondary side of miniature current sensor T1-T3 forms geometric ratio in the secondary current i of load current I, and this secondary current i is input to the electric energy metrical unit.B is identical with the connected mode of C phase mutually.
V/I/v voltage sampling loop is included between the input end of high-voltage load lead and electric energy metrical unit, setting is by comprising an impedance with standard/blocked impedance at least, secondary impedance and the high pressure sensor that miniature current sensor constitutes with standard/blocked impedance, an impedance is with after the primary side input end of miniature current sensor is connected, be connected with the two ends of high-voltage load lead, the secondary side output terminal of miniature current sensor is in parallel with secondary impedance, and the secondary side output terminal of miniature current sensor is connected with the input end of electric energy metrical unit.
Three-phase and four-line Y-y connection is adopted in V/I/v voltage sampling loop, comprise miniature current sensor T4-T6, resistance R 1-R6 and potentiometer RP1-RP3, the A of high-voltage load lead and N are in series with the primary side input end of resistance R 1 and miniature current sensor T4 between mutually, connect resistance R 4 between the secondary side output terminal two ends of miniature current sensor T4, an end of resistance R 4 connects the input end of electric energy metrical unit by potentiometer RP1.
I/P gets resource loop and comprises at least one miniature current sensor, preferably adopts 3 miniature current sensors.The secondary side winding output terminal of miniature current sensor connects the input end of rectification circuit, between voltage regulation unit and the electric energy metrical unit electric battery is set.Get the source mutually at 3 of high-voltage load lead, also can single-phasely get the source.
I/P gets resource loop and comprises miniature current sensor T7-T9, rectification circuit comprises diode D1-D6, the secondary side of miniature current sensor T7-T9 is provided with public ground, and output terminal is series diode D1-D6 respectively, and the common port of diode D1-D6 connects energy-storage units and voltage regulation unit.Rectification circuit also can be bridge rectifier, voltage multiplying rectifier, half-wave rectification etc.Load current plays store electrical energy in normal range; Can afterflow when load current is too small, provide working power Vcc unaffected, prevent that electric energy meter from quitting work.
I/i current sampling loop and V/I/v voltage sampling loop, or adopt phase three-wire three V-v connection, angle-angle or single-phase connection.
Electric energy metrical unit and display adopt original metering module.The unified design of electric energy metrical unit and miniature current sensor, changed traditional mode of connection of electric energy meter, the normalized current signal of miniature current sensor, the normal voltage signal, according to metering module input requirement, directly being processed into can direct-connected signal, has reduced the secondary conversion of normal voltage signal, has cancelled the copper-manganese shunt resistance of normalized current signaling interface.The electric energy metrical unit that has a PORT COM can realize far copying or far infrared is copied.
The beneficial effect of the utility model sensor type high tension electricity energy gauging table is:
1, adopt current method to measure high tension voltage, no ferroresonance, strong shock resistance, security performance height.Solve the electromagnetic resonance that electromagnetic transformer exists, higher hamonic wave, switching overvoltage to problems such as safe operation threaten, satisfied the requirement of metering, measurement, monitoring and protection fully;
2, avoided adopting the common voltage sensor of partial pressure type measuring method to be subjected to the influence of distributed capacitance over the ground bigger, the measuring error deviation differs in the electric system of different topology structure, can not adapt to the problem of the electric system with multiple connection plan form well;
3, the high tension voltage that can realize the relative phase of three-phase three-wire system or three-phase four-wire system is easily measured;
4, both can adopt the conventional mode of connection to satisfy the sample of signal requirement of zero sequence protection device, can form the open delta mode of connection again, satisfy the sample of signal requirement of differential protection;
The needs that 5, can adapt to grid automation can provide and satisfy the multiple required voltage signal of metering, measurement, monitoring or protection system simultaneously, it is measured oversimplify;
6, its sampling mode not only energy-conservation, save installing space, save manufacturing materials, but also can reduce measuring cost significantly; good environmental protection; no electricity is made an uproar, corona sound, is convenient to measure, the mounting, commissioning and maintenance of measurement or protective device, has played key effect to improving power supply quality.
7, safe operation coefficient height: single turn overcurrent is saturated not to be burnt, and can not occur the over-current phenomenon avoidance voltage transformer (VT) during superpotential does not have the magnetic saturation phenomenon.
8, the input block of electric energy meter does not have the copper-manganese shunt resistance, has thoroughly solved the problem of burning table tail.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the three-phase and four-line Y-y connection circuit theory diagrams in the I/i current sampling loop of embodiment 1 of the present utility model;
Fig. 3 is the three-phase and four-line Y-y connection circuit theory diagrams in the V/I/v voltage sampling loop of embodiment 1 of the present utility model;
Fig. 4 is the supply unit circuit theory diagrams of embodiment 1 of the present utility model;
Fig. 5 is the phase three-wire three V-v connection circuit theory diagrams in the I/i current sampling loop of embodiment 2 of the present utility model;
Fig. 6 is the phase three-wire three V-v connection circuit theory diagrams in the V/I/v voltage sampling loop of embodiment 2 of the present utility model;
Fig. 1-the 4th, the most preferred embodiment of the utility model sensor type high tension electricity energy gauging table, at Fig. 1-6 wherein: the miniature current sensor U1 of T1-T13 electric energy metrical unit U2 voltage regulation unit U3 energy-storage travelling wave tube R1-R10 resistance R P1-RP6 potentiometer D1-D6 diode E1 electric battery
Embodiment
Be described further below in conjunction with Fig. 1-6 pair of the utility model sensor type high tension electricity energy gauging table.
Embodiment 1:
As shown in Figure 1, the output terminal in V/I/v voltage sampling loop connects the input end of electric energy metrical unit, and the output terminal of electric energy metrical unit connects display.The output terminal in I/i current sampling loop connects the input end of electric energy metrical unit.I/P gets the supply unit that resource loop, rectification circuit, energy-storage units and voltage regulation unit are formed, I/P gets the input end of the output terminal connection rectification circuit of resource loop, the output terminal of rectification circuit connects the input end of energy-storage travelling wave tube and voltage regulation unit, and the output terminal of voltage regulation unit connects the power end of electric energy metrical unit.
Voltage signal is obtained from the high-voltage load lead in V/I/v voltage sampling loop, input electric energy metrical unit.Current signal is obtained from the high-voltage load lead in I/i current sampling loop, input electric energy metrical unit.I/P gets resource loop and obtains voltage signal from the high-voltage load lead, through supply of electrical energy metering module after rectification circuit arrangement and the voltage regulation unit voltage stabilizing, provides operating voltage Vcc.Electric energy metrical unit and display adopt original metering module.The electric energy metrical unit is detected normalized current signal, the normal voltage signal, and according to metering module input requirement, directly being processed into can direct-connected signal, measures.And structure crossed display shows and output.Need to carry out the high-low pressure isolation processing between high-voltage load lead and the miniature current sensor secondary side, the electric current of collection, voltage signal need electromagnetic screen and electrostatic prevention to handle.The electric energy metrical unit that has a PORT COM can realize far copying or far infrared is copied.
As shown in Figure 2, I/i current sampling loop: the primary side of miniature current sensor T1-T3 is a single-turn winding, and secondary side connects electric energy metrical unit U1.
The current sampling in I/i current sampling loop adopts the principle of work of penetration type electric energy meter, according to needs with one or many miniature current sensors of penetration type (T1-T3), it is the winding that single turn or punching (when needing can with multiple circle) can be born tested electric current and corresponding requirements that one or many hollow miniature current sensors are made into winding, the iron core good by the wide load characteristic of high sensitivity provides the adaptation microcomputer type at the output secondary, measure, mA level or the little current signal of μ A grade standard that metering needs, the magnetic core of miniature current sensor follows the material of selecting adaptation for use according to the characteristic of measured signal highly sensitive when guaranteeing little electric current, exceed and have saturation characteristic when measuring range of current, fault enlarges when avoiding excess current, the secondary of miniature current sensor (T1-T3) forms geometric ratio in the secondary current i of measured current I, this electric current is after the measuring accuracy requirement is satisfied in compensation, be input to electric energy metrical unit U1 and carry out electric energy metrical, the ratio of I/i is on duty goes into electric energy metrical unit U1.
Miniature current sensor T1-T3 is connected to three-phase and four-line Y-y connection.I/i current sampling loop can be followed according to purposes and be selected, also can fixed resistance in parallel, output current is transformed into voltage signal, and this just can reduce the ampere turns of conversion equipment greatly.Should carry out the high-low pressure isolation processing with the electric pressure of usefulness factually between primary side and the secondary side, make its operating voltage that can bear the relevant voltage grade, withstand voltage and lightning impulse voltage.For making the influence that is not subjected to electromagnetic interference (EMI) under its high voltage, satisfy the needs of electromagnetic compatibility, should carry out electromagnetic screen and electrostatic prevention and handle.This method is common prior art, does not do auspicious stating.
As shown in Figure 3, V/I/v voltage sampling loop: A phase: resistance R 1 is connected with the two ends of tested voltage with after the input end of miniature current sensor T4 is connected.The secondary side output terminal parallel resistance R4 of miniature current sensor T4, an end of resistance R 4 connects electric energy metrical unit U1 by potentiometer Rp1.B is identical with the connected mode of C phase mutually.
Isolate through high/low pressure between the output terminal of miniature current sensor T4-T6 and the input end.High/low pressure isolated location can be photo-electric, optical fiber type, electromagnetic type, gas-insulating type, oil-insulation formula or solid insulation formula spacer assembly.Resistance R 4-R6 is a resistive load, also can be capacity load, inductive load or its combination.Miniature current sensor T4-T6 can also be the miniature current sensor of photo-electric, the miniature current sensor of optical fiber, the miniature current sensor of electromagnetic type, the miniature current sensor of penetration type.By Compensation Regulation make tested voltage V in 80%, 100%, 120% scope with secondary voltage v error less than desired value, the linearity also will satisfy accuracy requirement.This voltage input electric energy metrical unit U1, as the normal voltage signal of high-voltage electric energy measurement, the no-load voltage ratio of V/v is taken advantage of into electric energy metrical unit U1.
Three-phase and four-line Y-y connection is adopted in sampling between A phase, B phase and the C phase.
As shown in Figure 4, supply unit: the secondary side of miniature current sensor T7 is provided with public ground, and output terminal is series diode D1, D2 respectively, and the common port of diode D1, D2 connects voltage regulation unit U2 and energy-storage travelling wave tube U3 respectively by potentiometer RP4.The output terminal of voltage regulation unit U2 connects electric battery E1, and output terminal is the Vcc end.The connection of miniature current sensor T8, T9 is identical with miniature current sensor T7.
By load current being flow through the voltage that miniature current sensor T7-T9 produces, carry out the electric energy that steps such as full-wave rectification, filtering are taken out to be needed, electric energy metrical unit U1 is provided required power Vcc.
Can be designed as, when load current I at 5% when following of running current, the voltage that miniature current sensor T7-T9 produces is during less than normal Vcc required voltage, and energy-storage travelling wave tube U3 and electric battery E1 play the afterflow compensating action, by energy-storage travelling wave tube U3 and electric battery E1 power supply Vcc; When load current I reached the running current of 5%-50%, miniature current sensor T7-T9 took out voltage, and to energy-storage travelling wave tube U3 charging, the not loss of electric energy that keeps energy-storage travelling wave tube U3; When load current I greater than 50% running current, and the electric energy of energy-storage travelling wave tube U3 is when being in the full state of storage, micro mutual inductor T7-T9 is in time saturated, stops overcharging to energy-storage travelling wave tube U3.Carrying out high-low pressure isolation processing and electromagnetic screen and electrostatic prevention with the electric pressure of usefulness factually between the winding of miniature current sensor T7-T9 and the Secondary Winding handles, make its operating voltage that can bear the relevant voltage grade, withstand voltage and lightning impulse voltage, and make the influence that is not subjected to electromagnetic interference (EMI) under its high voltage, satisfy the needs of electromagnetic compatibility, implementation method is an ordinary skill.
Phase failure indicating circuit can also be set at the secondary side of miniature current sensor T7-T9.Phase failure indicating circuit is common prior art, adopts circuit of LED to get final product.
The primary side of miniature current sensor T7-T9 can be the single turn lead, also can be punching, also can use multiturn as required.
The diode D1-D6 that rectifier is used can also select different rectification circuits according to working environment and load current characteristic, for example: bridge rectifier, voltage multiplying rectifier, half-wave rectification etc.
Embodiment 2:
As shown in Figure 5, the phase three-wire three V-v connection in I/i current sampling loop: the primary side of miniature current sensor T10 and T11 be high-voltage load lead A mutually with C single-turn winding mutually, secondary side connects electric energy metrical unit U1.
With the three-phase high-voltage load wire, insert two-phase and take a sample.The method principle is identical with three-phase and four-line Y-y connection.
As shown in Figure 6, the phase three-wire three V-v connection in V/I/v voltage sampling loop, any two-phase of three-phase alternating current high-tension electricity is taken a sample.The primary side of miniature current sensor T12, the T13 of A phase and C phase is provided with common port and is connected the B phase, and the secondary side connected mode is identical with three-phase and four-line Y-y connection.
Claims (8)
1. sensor type high tension electricity energy gauging table, be included in the V/I/v voltage sampling loop that the high-voltage load lead is provided with, the output terminal in V/I/v voltage sampling loop connects the input end of electric energy metrical unit, the output terminal of electric energy metrical unit connects display, it is characterized in that: I/i current sampling loop is set at the high-voltage load lead, the output terminal in I/i current sampling loop connects the input end of electric energy metrical unit, get resource loop in the setting of high-voltage load lead by I/P, rectification circuit, the supply unit that energy-storage units and voltage regulation unit are formed, I/P gets the input end of the output terminal connection rectification circuit of resource loop, the output terminal of rectification circuit connects the input end of energy-storage travelling wave tube and voltage regulation unit, and the output terminal of voltage regulation unit connects the power end of electric energy metrical unit.
2. sensor type high tension electricity energy gauging table according to claim 1, it is characterized in that: one or two or many miniature current sensors of penetration type are adopted in I/i current sampling loop, a winding is single turn or punching, and Secondary Winding connects the electric energy metrical unit.
3. sensor type high tension electricity energy gauging table according to claim 2, it is characterized in that: three-phase and four-line Y-y connection is adopted in I/i current sampling loop, comprise miniature current sensor T1-T3, the single-turn winding of the primary side of miniature current sensor T1-T3 is the high-voltage load lead, and secondary side connects the input end of electric energy metrical unit.
4. sensor type high tension electricity energy gauging table according to claim 1, it is characterized in that: V/I/v voltage sampling loop is included between the input end of high-voltage load lead and electric energy metrical unit, setting is by comprising an impedance with standard/blocked impedance at least, secondary impedance and the high pressure sensor that miniature current sensor constitutes with standard/blocked impedance, an impedance is with after the primary side input end of miniature current sensor is connected, be connected with the two ends of high-voltage load lead, the secondary side output terminal of miniature current sensor is in parallel with secondary impedance, and the secondary side output terminal of miniature current sensor is connected with the input end of electric energy metrical unit.
5. sensor type high tension electricity energy gauging table according to claim 4, it is characterized in that: three-phase and four-line Y-y connection is adopted in V/I/v voltage sampling loop, comprise miniature current sensor T4-T6, resistance R 1-R6 and potentiometer RP1-RP3, the A of high-voltage load lead and N are in series with the primary side input end of resistance R 1 and miniature current sensor T4 between mutually, connect resistance R 4 between the secondary side output terminal two ends of miniature current sensor T4, an end of resistance R 4 connects the input end of electric energy metrical unit by potentiometer RP1.
6. sensor type high tension electricity energy gauging table according to claim 1, it is characterized in that: I/P gets resource loop and comprises at least one miniature current sensor, the secondary side winding output terminal of miniature current sensor connects the input end of rectification circuit, between voltage regulation unit and the electric energy metrical unit electric battery is set.
7. sensor type high tension electricity energy gauging table according to claim 6, it is characterized in that: I/P gets resource loop and comprises miniature current sensor T7-T9, rectification circuit comprises diode D1-D6, the secondary side of miniature current sensor T7-T9 is provided with public ground, output terminal is series diode D1-D6 respectively, and the common port of diode D1-D6 connects energy-storage units and voltage regulation unit.
8. sensor type high tension electricity energy gauging table according to claim 1 is characterized in that: I/i current sampling loop and V/I/v voltage sampling loop, or adopt phase three-wire three V-v connection, angle-angle or single-phase connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200198836U CN201016997Y (en) | 2007-03-22 | 2007-03-22 | Sensor type high-voltage electrical energy meter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007200198836U CN201016997Y (en) | 2007-03-22 | 2007-03-22 | Sensor type high-voltage electrical energy meter |
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| CN201016997Y true CN201016997Y (en) | 2008-02-06 |
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| CNU2007200198836U Expired - Lifetime CN201016997Y (en) | 2007-03-22 | 2007-03-22 | Sensor type high-voltage electrical energy meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271129B (en) * | 2007-03-22 | 2010-12-01 | 淄博计保互感器研究所 | Sensor type high tension electricity energy gauging method |
| CN102608414A (en) * | 2012-03-28 | 2012-07-25 | 山东计保电气有限公司 | Embedded electric energy measuring method and application extension method of high voltage electrical switchgear |
-
2007
- 2007-03-22 CN CNU2007200198836U patent/CN201016997Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271129B (en) * | 2007-03-22 | 2010-12-01 | 淄博计保互感器研究所 | Sensor type high tension electricity energy gauging method |
| CN102608414A (en) * | 2012-03-28 | 2012-07-25 | 山东计保电气有限公司 | Embedded electric energy measuring method and application extension method of high voltage electrical switchgear |
| CN102608414B (en) * | 2012-03-28 | 2014-05-07 | 山东计保电气有限公司 | Embedded electric energy measuring method and application extension method of high voltage electrical switchgear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zibo Electric Co., Ltd. Paul electric Assignor: Zibo Jibao Mutual Inductor Inst. Contract fulfillment period: 2009.7.17 to 2014.7.16 Contract record no.: 2009370000259 Denomination of utility model: Sensor type high-voltage electrical energy meter Granted publication date: 20080206 License type: Exclusive license Record date: 20090903 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.7.17 TO 2014.7.16; CHANGE OF CONTRACT Name of requester: ZIBO JIBAO ELECTRIC APPLICANCE CO., LTD. Effective date: 20090903 |
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| CX01 | Expiry of patent term |
Granted publication date: 20080206 |
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| CX01 | Expiry of patent term |