CN202182910U - High voltage electric energy metering device - Google Patents
High voltage electric energy metering device Download PDFInfo
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- CN202182910U CN202182910U CN2011202899786U CN201120289978U CN202182910U CN 202182910 U CN202182910 U CN 202182910U CN 2011202899786 U CN2011202899786 U CN 2011202899786U CN 201120289978 U CN201120289978 U CN 201120289978U CN 202182910 U CN202182910 U CN 202182910U
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Abstract
The utility model relates to a high voltage electric energy metering device, which is characterized in that: a resistor type high voltage attenuator comprises two mutually parallelly arranged flat electrodes; a sheet-type high voltage arm resistor is slantwise arranged between the two electrodes; the included angle between the high voltage arm resistor and the electrodes is less than 30 degrees; a capacitance voltage reduction type power supply circuit is serially connected with a high-voltage ceramic capacitor, a high voltage fuse, and a high voltage damping resistor; the high voltage attenuator is arranged at the side surface of the high voltage fuse while a high voltage capacitor is arranged at the end portion of the high voltage fuse; and the components mentioned above are enclosed in a cylindrical housing via silicone rubber. The high voltage electric energy metering device of the utility model features high precision, high temperature stability, low energy consumption, small size, and usage security and is applicable to the electric energy metering for high voltage power lines of 6kv-35kv single phase, three-phase three-wire, and three-phase four-wire system.
Description
Technical field
The utility model relates to a kind of high-voltage electric-energy meter, also claims high-voltage electric energy meter, is mainly used in more than the 6kV, and the following high-voltage electric power circuit of 35kV is specially adapted to the 10kV high-voltage electric power circuit.
Background technology
In order to adapt to electric system high voltage, jumbo developing direction; And in order to satisfy energy-saving and cost-reducing requirement, it is particularly important that the problem of electric energy accurate measurement seems, has only through accurate electric energy metrical as foundation; Could strengthen the management of consumer, reach energy saving purposes.Electric energy metrical divides high-voltage electric energy measurement mode and low-voltage electric energy metering mode.Wherein the low-temperature measurement mode is that low-pressure side (generally being 220V/380V) at terminal transformer is carried out electric energy metrical, and the high-voltage electric energy measurement mode is that electric energy metrical is carried out in the high-pressure side (generally more than 6kV) at terminal transformer.Because the high-voltage electric energy measurement mode can be with the also metering in the lump of electric energy loss of terminal transformer; And because electric pressure is high; Increased the improper difficulty that influences the device metering accuracy; Therefore the high-voltage electric energy measurement mode has metering more accurate, and safer advantage is the electric energy metrical mode that present electric system is promoted mainly.
At present, the employed metering method in electric energy metrical aspect for 35kV and following high voltage supply circuit and consumer mainly is the mode that electromagnetic type high voltage potential transformer, high-tension current inductor add electric energy meter.Wherein high voltage potential transformer converts the primary side high pressure normal voltage of 100V grade into, and high-tension current inductor is the normalized current of 5A grade with the big current conversion of primary side, inserts electric energy meter, and electric energy meter measures energy value.Wherein the electromagnetic type high voltage potential transformer is except that provide metering with the voltage signal for electric energy meter; Also,, realize step-down through transformer because the electromagnetic type high voltage potential transformer comprises transformer for electric energy meter and other consumers provide low-voltage supply; And volume of transformer is big; So caused the entire equipment volume big, equipment is heavy, and there is the ferroresonance problem in the electromagnetic type high voltage potential transformer.According to theory of errors, the maximum system error of electric energy metrical equals the error sum of voltage transformer (VT), current transformer and electric energy meter, so systematic measurement error is bigger, is difficult to improve the system accuracy of electric energy metrical simultaneously.And, caused the uncertainty of error in dipping owing to uncertain factors such as three interelement cooperations and connection status.
Along with the development of measurement technology, the high-voltage electric-energy meter of high voltage supply circuit has appearred being directly connected to, also claim high-voltage electric energy meter.This is a kind of integrated apparatus, and its device error in dipping is system's error in dipping, and the maximum error of electric energy metrical has possessed determinacy, has improved measuring accuracy simultaneously.This type novel high-pressure electric power meter; Convert low voltage signal and the power electronics mode that electronic circuit can receive to from the primary side high-voltage signal and can be divided into following two kinds of technology paths: 1, with traditional electromagnetic type high voltage potential transformer summation current transformer miniaturization; The low power consumption of secondary side electronic circuit; And with three's composition high-voltage electric-energy meter that is packaged together, the technical difficult points of this scheme is still need solve the High-Voltage Insulation problem and eliminate the ferroresonance problem.2, adopt condenser divider or resistance divider to replace the electromagnetic type high voltage potential transformer, adopt the capacitor step-down power supply, adopt equipotential principle and optical fiber communication to avoid the Insulation Problems of current transformer to power electronics.Wherein technology path 2 is main directions of present technical development.
The technical difficult points of technology path 2 is following:
The first, as adopting condenser divider, capacitor receives the influence of stray electric field bigger, needs to solve to reduce volume and minimizing
Contradiction between the interference; Capacitor volume receives Influence of Temperature also bigger, is used for the power equipment scene, and precision receives the interference of temperature variation easily.
The second, adopt resistance divider, when resistance value hour, with producing bigger active loss, need to increase volume and solve heat dissipation problem; When resistance value is big, the space stray electric field will produce interference to output accuracy through stray capacitance.And during variation of ambient temperature, the capacity of resistance value and stray capacitance is all exerted an influence, and then influence output accuracy.
Three, adopt the capacitance decompression power supply technique, decompression capacitor is bearing extremely tens of kilovolts high voltage of thousands of volts for a long time, and the long-term work security of high-voltage capacitor is very important.High-voltage paper dielectric container has the advantage that punctures back " self-healing "; Relative safety is higher; Thereby widespread use in electric system, but that high-voltage paper dielectric container has single-stage is withstand voltage low, needs plural serial stage to use; And bulky shortcoming has certain restriction to the high-voltage electric-energy meter that is applied to miniaturization; High voltage ceramic capacitor has the withstand voltage height of single-stage, advantage that volume is little, in some high-voltage electric-energy meter, uses.But high voltage ceramic capacitor can form short circuit after high-voltage breakdown, directly applies to high-tension line and has the risk that fault is further enlarged.
The utility model content
The utility model technical matters to be solved is that a kind of high precision, high-temperature stability, low-power consumption, volume high-voltage electric-energy meter little, safe in utilization are provided.
The technical scheme of the utility model is:
A kind of high-voltage electric-energy meter comprises the housing that has first terminals and second terminals, in housing, is provided with meter
Amount is handled and power circuit, and metering is handled and power circuit comprises ic for energy metering and power circuit, it is characterized in that:
In housing, also be provided with high-voltage bleeder; Described high-voltage bleeder comprises high-voltage bleeder first electrode and high-voltage bleeder second electrode of setting parallel to each other; The high-voltage arm resistor of chip tilts to be positioned between high-voltage bleeder first electrode and high-voltage bleeder second electrode; High-voltage arm resistor one end is near high-voltage bleeder first electrode; The other end is near high-voltage bleeder second electrode; And the angle between first, second electrode of high-voltage arm resistor and high-voltage bleeder is less than 30 degree; The high-voltage arm resistor connects high-voltage bleeder first electrode near the lead-in wire of high-voltage bleeder first electrode one end; Lead-in wire near high-voltage bleeder second electrode one side is connected to described ic for energy metering from drawing near high-voltage bleeder second electrode, the high-voltage arm resistor film of high-voltage arm resistor on high-voltage bleeder first electrode and high-voltage bleeder second electrode with high-voltage bleeder first electrode and the high-voltage bleeder second electrode vertical direction on the electrode plane scope that is projected in institute's projection within; Fill insulating medium between high-voltage bleeder first electrode and high-voltage bleeder second electrode and around the high-voltage arm resistor; First terminals are connected with high-voltage bleeder second electrode.
Be provided with high-tension fuse in the high-voltage bleeder side; Be provided with high-voltage capacitor on the high-tension fuse top; High-tension fuse first electrode of high-tension fuse is connected with described second terminals; High-tension fuse second electrode is connected with high-voltage capacitor first electrode and high-voltage bleeder first electrode of high-voltage capacitor respectively, and high-voltage capacitor second electrode of high-voltage capacitor is connected with described power circuit;
Also comprise the current transformer that is installed on the housing upper end, the secondary output terminal of current transformer is connected with described ic for energy metering;
Metering is handled and power circuit also is connected with the optical fiber communication transceiver.
Metering is handled and power circuit is provided with the metallic shield body on every side, and this metallic shield body is connected with first terminals.
Be filled with insulating material in the space between high-voltage bleeder, high-voltage capacitor, metering processing and power circuit and inner walls.Described insulating material is preferably silicon rubber.
Also be connected with the high pressure damped resistor between described high-tension fuse second electrode and described high-voltage capacitor first electrode with series system.
High-voltage capacitor is that high voltage ceramic capacitor is used in the electric system that rated operational voltage is not less than 10kV, and high-tension fuse is that rated voltage is not less than 10kV, and rated current is not more than the electric system of 1A and uses high-tension fuse.
A winding of current transformer has terminals that are connected with first terminals.
Housing comprises the epoxy glass fibre insulating pipe that has the silicon rubber full skirt, is separately installed with first metal flange and second metal flange at the two ends up and down of epoxy glass fibre insulating pipe; Wherein also be provided with the metal shielding board that has through hole on first metal flange, and metal shielding board is connected with first terminals with first metal flange respectively.
The good effect of the utility model is:
The first, through the high-tension fuse of in capacitance decompression loop and high-voltage bleeder loop, connecting, avoided because of high-voltage capacitor
Puncture short causes the possibility that causes the Power System Shortcuts accident between internal breakdown and high-voltage bleeder pole plate, has improved the security of device.
The second, through sealing in the high pressure damped resistor in the capacitance decompression loop, when having reduced high pressure and having applied suddenly to high-voltage capacitor
With the dash current of capacitor voltage-dropping power supply circuit, improved the reliability of capacitor step-down power circuit.
Three, through the special space structure of high-voltage bleeder, improve the input impedance of high-voltage bleeder, the precision and the temperature stability of voltage sample, reduced power consumption, dwindled volume.For example the high-voltage bleeder input impedance of 10kV high-voltage electric-energy meter can be designed into 50M Ω, and volume can be accomplished 120mm * 70 mm * 20mm.
Four, through the relative tertiary location arrangement between high-tension fuse and high-voltage bleeder and the high-voltage capacitor, dwindled the volume of device, help the miniaturization of device.
Description of drawings
Fig. 1 is the utility model single-phase high voltage electric power meter structural representation.
Fig. 2 is that the utility model metering is handled and the power circuit block diagram.
Fig. 3 is the electric field potential-location diagram of the utility model high-voltage bleeder.
Fig. 4 is the utility model high-voltage bleeder structural representation.
Fig. 5 is the utility model three-phase three-wire system high-voltage electric-energy meter structural representation.
Fig. 6 is the utility model three-phase four-wire high voltage energy WT-MSR structural representation.
Embodiment
Embodiment one
As shown in Figure 1; Present embodiment is a kind of single-phase high voltage electric power meter of the 10kV of being used for electric pressure; Comprise current transformer 10, high-voltage bleeder 20, high-voltage capacitor 30, high-tension fuse 40, metering handles and power circuit 50, optical fiber communication transceiver 60, first terminals 1, second terminals 2 and housing 80, wherein:
A. high-tension fuse first electrode 41 of high-tension fuse 40 is connected high-tension fuse second electrode with second terminals 2
42 are connected with high-voltage capacitor first electrode 31 of high-voltage capacitor 30 and high-voltage bleeder first electrode 21 of high-voltage bleeder 20 respectively.
B. metering processing and power circuit 50 comprise ic for energy metering 51, data processing circuit 52, memory circuit 53, power circuit 54, communication interface circuit 55 5 portions of electronics circuit, and be as shown in Figure 2.Wherein ic for energy metering serves as main the composition with special-purpose electric energy computation chip (present embodiment is used CS5463); Also can use analog/digital converter (ADC) is main the composition, and function is to accomplish voltage, current analog signal to the conversion of digital signal and the metering of electric energy.Data processing circuit serves as main the composition with microprocessor (present embodiment is used MSP430F5438); Function is that the relevant information of electric energy that ic for energy metering collects is carried out further processed; And add up, be sent to storer simultaneously or pass through communication interface and extraneous swap data.Memory circuit is used for storage of electrical energy cumulative data and necessary parameter data.The function of power circuit is that step-down, voltage stabilizing are further carried out in the input after 10kV high pressure process high-voltage capacitor (30) the step-down current limliting, and converts the needed working power voltage of metering each module of processing to.Condenser type voltage dropping power supply late-class circuit has various ways, like the simplest shunt regulating circuit.Present embodiment has adopted a kind of power circuit that can dynamically adjust the high-voltage capacitor intrinsic standoff ratio according to the circuit load situation; Power supply capacity when both having guaranteed heavy duty; Have less quiescent dissipation when having guaranteed underload again, detailed technology information see the publication application documents (application number: 201010532364.6, title: a kind of method of obtaining low-tension supply from high-voltage electric power circuit; Applicant country: China, open day: 2011.4.13).The function of communication interface is to get in touch through serial communication port and fiber optical transceiver or other communication medias, accomplishes mutual data communication through the communication protocol of agreement, so that energy information is passed.Disposed a pair of optical fiber communication interface in the present embodiment, be used for communicating by letter between a plurality of single-phase high voltage electric power meters, also be provided with in addition between Generalized Communication Interface and electric energy remote transmitting system and communicate by letter.
C. high-voltage capacitor second electrode 32 of high-voltage capacitor 30 handle with metering and power circuit 50 in power circuit 54 be connected.
D. the secondary output terminal 13 of current transformer handle with metering and power circuit 50 in ic for energy metering 51 be connected.
E. metering processing and power circuit 50 also are connected with optical fiber communication transceiver 60 with first terminals 1.
F. high-voltage bleeder 20 is positioned at high-tension fuse 40 sides, and high-voltage bleeder first electrode 21 of high-voltage bleeder is near high-tension fuse 40; High-voltage capacitor is positioned at the top of high-tension fuse 40.
G. be provided with metallic shield body 56 around metering processing and the power circuit 50; This metallic shield body 56 is near high-voltage bleeder second electrode 22 of high-voltage bleeder 20, and is connected with high-voltage bleeder second electrode 22 of first terminals 1 and high-voltage bleeder 20 respectively.This metallic shield body has a plurality of through holes, has other parts to pass through with the cable that metering is handled and power circuit 50 is connected in the through hole.
H. as shown in Figure 4, high-voltage bleeder first electrode 21 of high-voltage bleeder 20 respectively is of a size of 120mm * 70mm copper plate with one with high-voltage bleeder second electrode 22, and spacing 15mm is parallel to each other.High-voltage arm resistor 23 is of a size of the chip resistor of 100mm * 25mm for length and width, and resistance value is 50M Ω, and its substrate all is to be processed by the stupalith of identical physical dimension and material with cover plate.High-voltage arm resistor film is coated on the ceramic substrate by serpentine pattern equably; In the middle of substrate and cover plate are sealed in resistive film; High-voltage arm resistor 23 tilts to be positioned between high-voltage bleeder first electrode 21 and high-voltage bleeder second electrode 22; One side is near high-voltage bleeder first electrode 21; Opposite side is near high-voltage bleeder second electrode 22, and the geometric center of high-voltage arm resistor 23 overlaps with the geometric center of the rectangular parallelepiped of two electrodes formations.The projection of high-voltage arm resistor 23 on the electrode vertical direction is about electrode outer edge symmetry; Specifically; The projection of high-voltage arm resistor on the electrode vertical direction is a rectangle; Electrode also is a rectangle, and the rectangle of projection is in the rectangular centre position of electrode, and these two rectangle central points overlap.High-voltage arm resistor 23 links to each other with high-voltage bleeder first electrode 21 near the lead-in wire of high-voltage bleeder first electrode 21 1 sides nearby; Near the lead-in wire of high-voltage bleeder second electrode 22 1 sides from drawing near the second electrode perforate, be connected to that metering is handled and power circuit 50 in ic for energy metering 51.Be connected to a lead end of low-voltage arm resistance device simultaneously; Another lead end of low-voltage arm resistance device is connected to high-voltage bleeder second electrode 22.Present embodiment mesolow arm resistor is arranged on metering processing and the power supply circuit board, and resistance value is 6.8 k Ω.
High-voltage capacitor 30 need be selected different withstand voltage other capacitors of level for use according to different high-tension line electric pressures, and present embodiment selects for use the 10kV electric system to use the higfh-tension ceramics columnar capacitor, and capacity is 2500pF.
High-tension fuse 40 is that fuse is used in the 10kV electric system, rated voltage 10kV, rated current 0.2A.
Also be connected with high pressure damped resistor 70 between high-tension fuse second electrode 42 in the high-tension fuse 40 and high-voltage capacitor first electrode 31 of high-voltage capacitor 30 with series system.
A winding of current transformer 10 has terminals 12 to be connected with first terminals 1.Current transformer is a winding single turn punching mutual inductor in the present embodiment; Brass bar passes current transformer as a winding; First end of brass bar is terminals 12; These terminals 12 and 1 welding of first terminals are as the electric current leading-out terminal, and second end of brass bar is as electric current end of incoming cables 11.The Secondary Winding lead-in wire 13 of current transformer 10 is connected to the ic for energy metering 51 in metering processing and the power circuit 50.
The fiber optical transceiver that is arranged on first metal flange, 83 internal cavities connects two optical fiber (receives), and optical fiber is guided to the second metal flange place along the inwall of epoxy glass fibre insulating pipe 81 and guided to the device outside again through the through hole of metal shielding board 85.
Form filled silicon rubber insulating material 90 in the inner spaces in that first metal flange 83, metal shielding board 85, epoxy glass fibre insulating pipe 81, second metal flange 84 are inner.Silicon rubber insulation material 90 is sealed in high-voltage bleeder 20, high-voltage capacitor 30, metering processing and power circuit 50 and metallic shield body 56 thereof wherein.
High-voltage electric-energy meter recited above can be accomplished the single-phase high voltage electric energy metrical, also be called the single-phase high voltage electric power meter.
Embodiment two
As shown in Figure 5; In the present embodiment; Two as the described single-phase high voltage electric power meter of first embodiment are arranged, its second terminals 2 and second metal flange 84 are connected to lean against privately couple together, draw the B phase that second terminals 2 connect electric system respectively; The A that the electric current end of incoming cables 11 of two single-phase high voltage electric power meters connects electric system respectively mutually with C end of incoming cables mutually, two first terminals 1 are respectively as A phase and C outlet termination consumer mutually.The fiber optical transceiver of two single-phase high voltage electric power meters interconnects through two optical fiber, and data processing circuit 52 carries out two single-phase high voltage electric power meters through optical fiber communication and gathers always adding of electric flux.
Be provided with three supporting insulators in addition, fixing respectively two first metal flanges 83 of an end and back-to-back second metal flange 84, an other end is fixed on the base.
The described high-voltage electric-energy meter of present embodiment carries out three-phase electric energy metering with the two elements method, is applicable to the three-phase three-wire system high-tension line, belongs to the three-phase three-wire system high-voltage electric-energy meter.
Embodiment three
As shown in Figure 6, in the present embodiment, three as the described single-phase high voltage electric power meter of first embodiment are arranged, its three device second terminals 2 are connected with each other and draw the N phase that the 3rd terminals 3 connect electric system.Current transformer 10 adopts the penetration type current transformers, and the intermediate throughholes that the A of electric system, B, C threephase cable pass three current transformers 10 at first respectively is connected with separately first terminals 1, and then is connected to consumer.
Base is set in addition, on second metal flange, the 84 difference firm bankings of three single-phase high voltage electric power meters.
The fiber optical transceiver 60 of three single-phase high voltage electric power meters adopts ring topology to interconnect through two optical fiber respectively, and data processing circuit 52 carries out three single-phase high voltage electric power meters through optical fiber communication and gathers always adding of electric flux.Connection optical fiber cabling in base between three single-phase high voltage electric power meters.
The described high-voltage electric-energy meter of present embodiment carries out three-phase electric energy metering with the element method, is applicable to the three-phase four-wire system high-tension line, belongs to the three-phase four-wire high voltage energy WT-MSR.
Like Fig. 3, the high-voltage bleeder of the utility model adopts between a pair of flat metal body electrode that is parallel to each other and is full of the uniform insulation medium, between two electrodes, applies voltage U
0, then the electric field between two electrodes is that a potential gradient is by the uniform electric field E of high-field electrode to the linear reduction of low-field electrode
0, the electromotive force E of certain point in its electric field
1By this o'clock to the distributed capacitance two electrodes and insulating medium electric resistance partial pressure than decision; And the resistance value of the capacity of distributed capacitance and insulating medium resistance is all linearly proportional with distance under the identical prerequisite of dielectric material electric property, and promptly the electromotive force of each point is E in the electric field
1=d
1/ d
0* E
0If the resistor that resistance value is evenly distributed on the resistive element length direction is positioned in this electric field obliquely; And (low-voltage arm resistance device dividing potential drop is minimum for two ends and two electrode equipotentials; Ignore), put locational dividing potential drop U according to provable this resistor of geometrical principle
1=l
1/ l
0* U
0=d
1/ d
0* E
0=E
1Therefore resistor at that point with on every side between the electric field electromotive force equate; The capacitance current of distributed capacitance on every side and the leakage current of insulator do not produce shunting to resistance; The electric current that then need not increase resistor reduces the influence of the capacitance current and the leakage current of distributed capacitance, so the impedance of high-voltage arm resistor can design very highly.
Temperature is all influential to the specific inductive capacity and the resistivity of insulating medium.If certain o'clock is identical to the temperature of uniform insulation medium between two electrodes in the electric field, then E
1=d
1/ d
0* E
0Relation is set up, and the influence of temperature factor is cancelled, and can obtain lower temperature coefficient.If but temperature is different, then E
1=d
1/ d
0* E
0No longer set up, with producing bigger temperature effect.Therefore the temperature difference that reduces between each point point and two electrodes will reduce temperature effect effectively.In the utility model because the high-voltage arm resistor is to tilt to be positioned between two electrodes with less angle, each point and two parallel pole close together on the resistance, the temperature difference between the two is less, so can obtain higher temperature stability.And the cylindrical structural in the existing technology, electrode is the two ends at resistor, and distance is far away, and the temperature difference between the two is difficult to reduce, and therefore is difficult to obtain higher temperature stability.
Resistor tilts to be positioned in the electric field; Chip resistor is because the snakelike arrangement of resistive film; And the cross-section center line is parallel with electrode; Voltage gradient on the resistor becomes dull trend in the longitudinal direction, can improve the consistance of each point voltage and electric field potential on the resistive film, thereby can reduce capacitance current and leakage current; And cylindrical resistor is because resistive film is circumferential arrangement; Voltage gradient can not form dull trend on axis direction, each point voltage and each point electric field potential are inconsistent on the resistive film, has big electric potential difference; Cause big capacitance current and leakage current, reduced temperature stability.
Carrier as resistive film; The resistor substrate is indispensable; But because the specific inductive capacity of the insulating medium of filling between its specific inductive capacity and electrode is difficult to be consistent, it makes that relative two the interelectrode insulating mediums of resistor are inconsistent, to will having a negative impact of Electric Field Distribution.As above resistive film, installing a cover plate that material is identical with electric property symmetrically additional, make the insulating medium electric property on resistor two sides be consistent, will offset this adverse effect.
The scope of the high and low pressure uniform electric field that electrode produces that is parallel to each other should could guarantee that like this high-voltage arm resistor works in the uniform electric field greater than the fitting limit of high-voltage arm resistor, and above-mentioned relation is just set up.Therefore the outer edge of high-voltage arm resistor film projection on the electrode plane vertical direction is good more apart from the big more effect of distance of electrode plane outer edge, is not less than the half the of distance between two electrodes in principle.
Can fill multiple insulating medium between electrode, advantage such as wherein the silicon rubber insulation material is high pressure resistant because of having, climate adaptability is good is one and selects preferably.
Claims (8)
1. high-voltage electric-energy meter; Comprise the housing (80) that has first terminals (1) and second terminals (2); In housing (80), being provided with metering handles and power circuit (50); Metering is handled and power circuit (50) comprises ic for energy metering (51) and power circuit (54), it is characterized in that:
In housing (80), also be provided with high-voltage bleeder (20); Described high-voltage bleeder (20) comprises high-voltage bleeder first electrode (21) and high-voltage bleeder second electrode (22) of setting parallel to each other; The high-voltage arm resistor (23) of chip tilts to be positioned between high-voltage bleeder first electrode (21) and high-voltage bleeder second electrode (22); High-voltage arm resistor (23) one ends are near high-voltage bleeder first electrode (21); The other end is near high-voltage bleeder second electrode (22); And the angle between high-voltage arm resistor (23) and first, second electrode of high-voltage bleeder is less than 30 degree; High-voltage arm resistor (23) connects high-voltage bleeder first electrode (21) near the lead-in wire of high-voltage bleeder first electrode (21) one ends; Lead-in wire near high-voltage bleeder second electrode (22) one sides is connected to described ic for energy metering (51) from drawing near high-voltage bleeder second electrode (22), and the high-voltage arm resistor film of high-voltage arm resistor (23) is on high-voltage bleeder first electrode (21) and high-voltage bleeder second electrode (22) and within the electrode plane scope that is projected in institute's projection on high-voltage bleeder first electrode (21) and high-voltage bleeder second electrode (22) vertical direction; Reach high-voltage arm resistor (23) between high-voltage bleeder first electrode (21) and high-voltage bleeder second electrode (22) and fill insulating medium (90) on every side; First terminals (1) are connected with high-voltage bleeder second electrode (22);
Be provided with high-tension fuse (40) in high-voltage bleeder (20) side; Be provided with high-voltage capacitor (30) on high-tension fuse (40) top; High-tension fuse first electrode (41) of high-tension fuse (40) is connected with described second terminals (2); High-tension fuse second electrode (42) is connected with high-voltage capacitor first electrode (31) and high-voltage bleeder first electrode (21) of high-voltage capacitor (30) respectively, and high-voltage capacitor second electrode (32) of high-voltage capacitor (30) is connected with described power circuit (54);
Also comprise the current transformer (10) that is installed on housing (80) upper end, the secondary output terminal (13) of current transformer (10) is connected with described ic for energy metering (51);
Metering is handled and power circuit (50) also is connected with optical fiber communication transceiver (60).
2. high-voltage electric-energy meter as claimed in claim 1 is characterized in that: metering is handled and power circuit (50) is provided with metallic shield body (56) on every side, and this metallic shield body (56) is connected with first terminals (1).
3. high-voltage electric-energy meter as claimed in claim 1 is characterized in that: be filled with insulating material (90) in the space between high-voltage bleeder (20), high-voltage capacitor (30), metering processing and power circuit (50) and housing (80) inwall.
4. high-voltage electric-energy meter as claimed in claim 3 is characterized in that: described insulating material (90) is a silicon rubber.
5. high-voltage electric-energy meter as claimed in claim 1 is characterized in that: also be connected with high pressure damped resistor (70) with series system between described high-tension fuse second electrode (42) and described high-voltage capacitor first electrode (31).
6. high-voltage electric-energy meter as claimed in claim 1; It is characterized in that: high-voltage capacitor (30) is that high voltage ceramic capacitor is used in the electric system that rated operational voltage is not less than 10kV; High-tension fuse (40) is that rated voltage is not less than 10kV, and rated current is not more than the electric system of 1A and uses high-tension fuse.
7. high-voltage electric-energy meter as claimed in claim 1 is characterized in that: a winding of current transformer (10) has terminals (12) that are connected with first terminals (1).
8. like claim 1 or 2 or 3 or 4 or 5 or 6 or 7 described high-voltage electric-energy meters; It is characterized in that: housing (80) comprises the epoxy glass fibre insulating pipe (81) that has silicon rubber full skirt (82), is separately installed with first metal flange (83) and second metal flange (84) at the two ends up and down of epoxy glass fibre insulating pipe (81); Wherein also be provided with the metal shielding board (85) that has through hole on first metal flange (83), and metal shielding board (85) is connected with first terminals (1) with first metal flange (83) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202899786U CN202182910U (en) | 2011-08-11 | 2011-08-11 | High voltage electric energy metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202899786U CN202182910U (en) | 2011-08-11 | 2011-08-11 | High voltage electric energy metering device |
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| Publication Number | Publication Date |
|---|---|
| CN202182910U true CN202182910U (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202899786U Expired - Lifetime CN202182910U (en) | 2011-08-11 | 2011-08-11 | High voltage electric energy metering device |
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| CN (1) | CN202182910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305883A (en) * | 2011-08-11 | 2012-01-04 | 烟台东方威思顿电气有限公司 | High-voltage electric energy metering device |
-
2011
- 2011-08-11 CN CN2011202899786U patent/CN202182910U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305883A (en) * | 2011-08-11 | 2012-01-04 | 烟台东方威思顿电气有限公司 | High-voltage electric energy metering device |
| CN102305883B (en) * | 2011-08-11 | 2013-01-23 | 烟台东方威思顿电气有限公司 | High-voltage electric energy metering device |
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