CN207248956U - A kind of high-voltage arm and high-voltage electric energy meter of more resistance series connection decompressions - Google Patents

Abstract

A kind of high-voltage arm and high-voltage electric energy meter of more resistance series connection decompressions are the utility model is related to, belongs to electric-power metering technical field.The high-voltage arm, applied in high-voltage electric energy meter, high-voltage arm includes：Resitstance voltage divider.Resitstance voltage divider includes：First circuit board and the multiple resistance being installed on first circuit board.Multiple resistance are sequentially connected in series to form resistance string, and first resistor scribbles the low resistance of insulating materials for surface.The high-voltage arm samples voltage by the way of the series connection of multiple first resistors, small, low in energy consumption, has evaded the risk using ferromagnetic resonance caused by voltage transformer sampled voltage.The heat dissipation contact surface that sampling adds first resistor is carried out to voltage by the way of the series connection of multiple first resistors, easy to radiate, temperature drift is reduced, improves sampling precision, so as to reduce the trueness error of electric energy meter.The utility model possesses：The plurality of advantages such as good reliability, safety coefficient are high, insulation effect is good, small, low in energy consumption, cost is low.

Description

A kind of high-voltage arm and high-voltage electric energy meter of more resistance series connection decompressions

Technical field

The utility model belongs to electric-power metering technical field, and in particular to a kind of high-voltage arm and height of more resistance series connection decompressions Press electric energy meter.

Background technology

At present in the power distribution network of China 6-35kV, most traditional way of energy measuring is to use electromagnetic type high tension voltage Mutual inductor, current transformer and low -voltage Watt -hour meter are composed, and three units separate independently of each other.When voltage, Current Mutual Inductance When device carries out separately installed with low -voltage Watt -hour meter, since low -voltage Watt -hour meter is installed on low-pressure side, easily by stealing.Develop into later Three units are combined, make traditional high-voltage electric energy meter.The high-voltage electric energy meter is by voltage, current transformer and low pressure Electric energy meter is integrally formed installed in high-pressure side, although can be to avoid stolen electricity, since primary side and secondary side need height Pressure-resistant insulation, therefore volume is big, heavy without easy to install, and ferromagnetic resonance is easily produced using this high-voltage mutual inductor.Its Secondary, during inspection, these three elements need separately that verification, the accuracy of measuring grade of whole high-voltage electric energy meter are difficult to demarcate.

For traditional high-voltage electric energy meter, there is the electric energy meter that voltage sampling is carried out using high-tension resistive, relatively In conventional high-tension electric energy meter, novel high-pressure electric energy meter solves its related defects, but new high-voltage electric energy meter remains Many deficiencies.Since the temperature drift of high-tension resistive is big, resistance value changes after fever, measurement accuracy can will be caused to be not allowed.Together When, due to high-tension resistive, there are distribution capacity and distributed inductance so that the angular difference value measurement of voltage is affected, and in perception and holds Accuracy is not high under property loading condition.In addition, the metal link position of high-tension resistive is few, and general both ends connection, is unfavorable for electricity Resistance increase heat dissipation contact surface, resistance heat after fever dissipate not open, form temperature drift, sampling precision is influenced, so as to influence electric energy The trueness error of table.In addition, high pressure axial direction resistance is directly across between two-phase high pressure, easily on edge after fill insulant Face forms air gap, in overvoltage or in the case of being impacted, because creepage distance not enough exists along face and climbs electrical breakdown or electric leakage Stream increase causes the risk that measurement error changes.Therefore, there is an urgent need for a kind of new voltage sample mode to deposit to solve high-voltage electric energy meter These defects.

Utility model content

In consideration of it, the purpose of this utility model is to provide a kind of high-voltage arm and high voltage electric energy of more resistance series connection decompressions Table, effectively to improve the above problem.

What the embodiment of the utility model was realized in：

The utility model embodiment provides a kind of high-voltage arm, and applied in high-voltage electric energy meter, the high-voltage arm includes：Electricity Hinder divider.The resitstance voltage divider includes：First circuit board and the multiple first resistors being installed on the first circuit board. The multiple first resistor is sequentially connected in series to form resistance string, and the first resistor scribbles the low resistance of insulating materials for surface.

In the utility model preferred embodiment, the region of the first resistor is not installed with the first circuit board It is provided with multiple first hollow-out slot bores.

It is logical per two adjacent first resistors in the multiple first resistor in the utility model preferred embodiment Copper foil connection is crossed, multiple copper foils are arranged on the first circuit board.

In the utility model preferred embodiment, multiple S-type rows of first resistor in the resistance string are formed Cloth is on the first circuit board.

In the utility model preferred embodiment, one end of the first circuit board is provided with the first locating part, described The other end of first circuit board is provided with the second locating part.

In the utility model preferred embodiment, the high-voltage arm further includes：Insulating sleeve, the resitstance voltage divider are set It is placed in the insulating sleeve, is used in the insulating sleeve filled with the filler being made of insulating materials, the filler Insulating wall is formed at multiple first hollow-out slot bores on the first circuit board.

In the utility model preferred embodiment, the insulating sleeve is externally provided with multiple full skirts, and the full skirt is by exhausted The annular relief that edge material is formed.

The utility model embodiment additionally provides a kind of high-voltage electric energy meter, including：For being coupled the first wiring of A phase current potentials Terminal, the second wire connection terminal for being coupled B phase current potentials, the 3rd wire connection terminal for being coupled C phase current potentials and two are such as above-mentioned More resistance series connection decompression high-voltage arm.Two high-voltage arms are the first high-voltage arm and the second high-voltage arm.First wiring Terminal is connected with second wire connection terminal by the resistance string of first high-voltage arm, and first high-voltage arm is used for AB phases Between voltage carry out partial pressure.The resistance string that 3rd wire connection terminal passes through second high-voltage arm with second wire connection terminal Connection, second high-voltage arm are used for the voltage alternate to CB and carry out partial pressure.

In the utility model preferred embodiment, the high-voltage electric energy meter further includes：First gold utensil, the second gold utensil, Three gold utensils, the first supporting insulator and the second supporting insulator, are provided with first wire connection terminal, institute on first gold utensil State and second wire connection terminal is provided with the second gold utensil, the 3rd wire connection terminal is provided with the 3rd gold utensil, it is described First supporting insulator is connected with first gold utensil, and second supporting insulator is connected with the 3rd gold utensil.

In the utility model preferred embodiment, the high-voltage electric energy meter further includes：First housing, second shielding cover With the 3rd housing, first housing is connected with first gold utensil, and the second shielding cover connects with second gold utensil Connect, the 3rd housing is connected with the 3rd gold utensil.

The beneficial effects of the utility model are：

The high-voltage arm and high-voltage electric energy meter for more resistance series connection decompression that the utility model embodiment provides, with prior art phase Than the high-voltage arm samples voltage by the way of the series connection of multiple first resistors, small, low in energy consumption, has evaded use The risk of ferromagnetic resonance caused by voltage transformer sampled voltage.In addition, to electricity by the way of the series connection of multiple first resistors Pressure is sampled, and is added the heat dissipation contact surface of first resistor, easy to radiate, is improved sampling precision, so as to reduce electric energy The trueness error of table.Further, since the temperature drift of low resistance is small, it is affected by temperature small, further increases measurement accuracy.The reality Possess with new：It is many that good reliability, safety coefficient are high, insulation effect is good, stability is high, small, low in energy consumption, cost is low etc. Advantage.

Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification In become apparent, or understood by implementing the utility model embodiment.The purpose of this utility model and other advantages It can realize and obtain by specifically noted structure in the specification, claims and attached drawing write.

Brief description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, drawings in the following description are only the utility model Some embodiments, for those of ordinary skill in the art, without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.By the way that shown in attached drawing, the above and other purpose, feature and advantage of the utility model will more Clearly.Identical reference numeral indicates identical part in whole attached drawings.Do not painted by actual size equal proportion scaling deliberately Attached drawing processed, it is preferred that emphasis is show the purport of the utility model.

Fig. 1 shows a kind of structure diagram for high-voltage arm that the utility model embodiment provides.

Fig. 2 shows the structure diagram of the resitstance voltage divider in Fig. 1 that the utility model embodiment provides.

Fig. 3 shows a kind of structure diagram for high-voltage electric energy meter that the utility model embodiment provides.

Icon：10- high-voltage arms；11- resitstance voltage dividers；111- first circuit boards；112- first resistors；113- One locating part；The second locating parts of 114-；115- copper foils；The first hollow-out slot bores of 116-；15- insulating sleeves；151- full skirts； 152- fillers；30- high-voltage electric energy meters；The first gold utensils of 31-；The second gold utensils of 32-；The 3rd gold utensils of 33-；34- first Support insulator；The second supporting insulators of 35-；The first housings of 36-；The first current transformers of 361-；362- first line Plate；37- second shielding covers；The second wiring boards of 371-；The 3rd housings of 38-；381- tertiary circuit plates；The electricity of 382- second Current transformer；39- optical fiber；40- metal sleeves；41- high-voltage power transmission devices.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and The component of the utility model embodiment shown can be arranged and designed with a variety of configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all Belong to the scope of the utility model protection.

It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.

, it is necessary to explanation in the description of the utility model, term " centre ", " on ", " under ", "left", "right", The orientation or position relationship of the instructions such as " interior ", " outer " be based on orientation shown in the drawings or position relationship, or practicality newly Type product using when the orientation usually put or position relationship, be for only for ease of description the utility model and simplify and describe, and It is not instruction or implies signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore It is not intended that the limitation to the utility model.In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and It is not intended that instruction or hint relative importance.

In the description of the utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, Or it is integrally connected；Can mechanically connect or be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can is the connection inside two elements.For the ordinary skill in the art, can be managed with concrete condition Solve concrete meaning of the above-mentioned term in the utility model.

Existing novel high-pressure electric energy meter generally use high-tension resistive carries out voltage sampling, since high-tension resistive is typically all Axial, volume is larger, body is longer, after the axial direction device embedding of this length, filler and device top layer used in embedding It is not easy to bond, easily forms air gap.This air gap can cause the creepage distance between two-phase high pressure small, be subject to overvoltage or high pressure The creeping discharge in face vertically and the bubble-discharge formed by the device surface, and shelf depreciation are produced when impact, The leakage current between two-phase will be increased, there will be severe punch-through, greatly have impact on the insulation performance of product and reliable Property.Therefore, to solve the above-mentioned problems, the utility model embodiment provides a kind of high-voltage arm 10 of more resistance series connection decompressions, As shown in Figure 1.The high-voltage arm 10 includes：Resitstance voltage divider 11 and insulating sleeve 15.

The resitstance voltage divider 11 is installed in the insulating sleeve 15, for partial pressure.Preferably, as shown in Fig. 2, the electricity Resistance divider 11 includes：First circuit board 111 and the multiple first resistors 112 being installed on first circuit board 111.

The first circuit board 111 is used to install first resistor 112, during installation, according to the design of S types by the first all electricity 112 uniform distributing installations are hindered on the first circuit board 111.In order to increase creepage distance, security performance during operation is improved Deng, it is preferable that the region that the first resistor 112 is not installed with the first circuit board 111 is provided with multiple first hollow outs Slot 116, it is further preferred that the centre of the first circuit board 111 and front/rear both sides are fitted without the area of first resistor 112 Domain is both provided with multiple first hollow-out slot bores 116.In addition, for the ease of fixing the first circuit board 111, it is preferable that this first One end of circuit board 111 is provided with the first locating part 113, and the other end of the first circuit board 111 is provided with the second locating part 114.Wherein it is preferred to first locating part 113 can be a raised spacing catwalk, second locating part 114 It can be a raised spacing catwalk.

Multiple first resistors 112 are sequentially connected in series to form resistance string, form multiple first resistors in the resistance string 112 S-type are arranged on the first circuit board 111.In order to increase the heat dissipation area of first resistor 112, reduce first resistor 112 temperature drift, improves the measurement accuracy of electric energy meter, it is preferable that adjacent two first resistor on first circuit board 111 The region of 112 connections is covered with copper foil 115.In other words, each two adjacent first resistors in the multiple first resistor 112 112 are connected by copper foil 115, and multiple copper foils 115 are arranged on the first circuit board 111.The copper foil 115 and first Resistance 112 is connected directly, and adds the heat dissipation area of first resistor 112, reduces the temperature drift of first resistor 112, so as to reduce The measurement error of electric energy meter.Wherein, the black portions in Fig. 2 be it is above-mentioned in copper foil 115.

It is arranged in wherein it is preferred to which multiple first resistors 112 in above-mentioned are S-type on the first circuit board 111, It can be made of multiple small S types, specifically, first circuit board 111 is divided into lower regions, the resistance of lower regions is mutual Staggeredly, multiple small S types curves are formed, it is in cosine or sine or square-wave-shaped that it is overall, as shown in the arrangement mode in Fig. 2.

In order to cost-effective, it is preferable that all first resistors 112 are the low resistance that surface scribbles insulating materials, Due to the simple production process of single small resistor, so cost is low.In addition, the temperature drift of low resistance is small, and every degree Celsius of change is drawn The temperature drift risen can accomplish below 10ppm, and the temperature drift of high-tension resistive can only be controlled in below 25ppm, therefore, further increased The measurement accuracy of electric energy meter.It is further preferred that the first resistor 112 is the low resistance being made of metal oxide film, relatively For line geometric pattern resistance, distribution-free capacitance and inductance, can further improve the measurement accuracy of electric energy meter.

Wherein, the quantity of the first resistor 112 can according to the relevant parameters such as the pressure-resistant of the first resistor 112, power with And the voltage of accessed power grid determines.

Wherein it is preferred to one end of first first resistor 112 in the resistance string is connected with the first terminals, One end of last first resistor 112 is connected with the second terminals.For example, as shown in Figure 2, positioned at first circuit The upper left first resistor 112 of plate 111 is first resistance in resistance string, below 111 upper right of first circuit board First resistor 112 is the last resistor in resistance string.

Preferably, the resistance parameter which is connected is identical, and therefore, electric field is evenly distributed, i.e. the resistance The resistance that divider 11 is connected is first resistor 112, and therefore, the resistance parameter connected is identical.In addition, the electric resistance partial pressure Device 11 samples voltage by the way of the series connection of multiple small resistors, small, low in energy consumption, has evaded and has used voltage transformer The risk of ferromagnetic resonance caused by sampled voltage.

Resitstance voltage divider 11 is installed in the insulating sleeve 15, which is applied in high-voltage electric energy meter.For Improve the insulation performance between wire connection terminal, it is preferable that filled with the filling being made of insulating materials in the insulating sleeve 15 Thing 152, the filler 152 at multiple first hollow-out slot bores 116 on the first circuit board 111 for forming absolutely Edge wall.In other words, a stifled insulating wall can be formed after insulating materials embedding between the first resistor 112 of first circuit board 111, The creepage distance between two first resistors 112 is added, so as to add two alternate creepage distances, solves axial high pressure The problems such as creeping discharge that resistance is formed because surface does not bond and bubble-discharge, improve two alternate insulation performances.

In addition, in order to further increase the creepage distance outside two alternate insulating sleeves 15, it is preferable that the insulating sleeve 15 Multiple full skirts 151 are externally provided with, the full skirt 151 is the annular relief being made of insulating materials.It is it is further preferred that the plurality of Annular relief is arranged at outside the insulating sleeve 15 at equal intervals, safe for operation to ensure for increasing the creepage distance of external insulation. Wherein, the distance between adjacent annular lug boss requires design, its security performance higher according to the standard of insulator.Wherein, it is excellent Selection of land, the plurality of annular relief are an integral molding structure with insulating sleeve 15.

Wherein, the material of the insulating sleeve 15 can be plastic material or rubber material or glass fibers Dimension；And the species of plastic material can have it is a variety of, for example, polyethylene terephthalate (Polyethylene Terephthalate, PET), polyethylene (polyethylene, PE), polypropylene (Polypropylene, PP) etc..Rubber material The species of matter can also have it is a variety of, for example, silica gel, neoprene, fluorine glue, acrylic adhesive etc..In this present embodiment, it is preferable that The insulating sleeve 15 is glass fibre sleeve.

Wherein, the material for the filler 152 being filled in insulating sleeve 15, the i.e. insulating materials can be plastic materials Or rubber material；And the species of plastic material can have it is a variety of, for example, polyethylene terephthalate (Polyethylene terephthalate, PET), polyethylene (polyethylene, PE), polypropylene (Polypropylene, PP) etc..The species of rubber material can also have it is a variety of, for example, silica gel, neoprene, fluorine glue, acrylic acid Ester gum etc..In this present embodiment, it is preferable that the material of insulating materials can be silica gel.

The utility model embodiment additionally provides a kind of high-voltage electric energy meter 30, as shown in figure 3, the high-voltage electric energy meter 30 wraps Include：Two above-mentioned 10, two high-voltage power transmission devices 41 of high-voltage arm, the first gold utensil 31, the second gold utensil 32, the 3rd gold utensil 33, One supporting insulator 34, the second supporting insulator 35, the first housing 36, second shielding cover 37, the 3rd housing 38, be installed on The first current transformer 361 and first line plate 362 in first housing 36, the second line being installed in second shielding cover 37 Road plate 371,381 and second current transformer 382 of tertiary circuit plate being installed in the 3rd housing 38.

Wherein, two above-mentioned high-voltage arms 10 are respectively the first high-voltage arm and the second high-voltage arm.

Wherein, two high-voltage power transmission devices 41 are respectively the first high-voltage power transmission device and the second high-voltage power transmission device.Wherein, Preferably, the first high-voltage power transmission device is installed in the first high-voltage arm, the second high-voltage power transmission device is installed on the second high pressure In arm.Wherein, the high-voltage power transmission device 41 is installed in the insulating sleeve 15, for partial pressure to first line plate 362, second Wiring board 371, tertiary circuit plate 381 are powered.

Wherein, two high-voltage power transmission devices 41 being installed in high-voltage arm 10, can be single high-voltage capacitance or Single high-tension resistive, can also be multiple capacitances, also or multiple resistance.In this present embodiment, it is preferable that high-voltage power transmission device 41 using the identical low-voltage line of multiple parameters around the second resistance low pressure CBB electric capacity identical with multiple parameters successively interleaved series into Row partial pressure takes electricity.

The high-voltage power transmission device 41 by second resistance with the first CBB electric capacity is interlaced connect after to high-voltage electric energy meter 30 Power supply, while the second resistance connected can play the role of good shock resistance.Connected by the high-voltage power transmission device 41 Second resistance resistance value is equal equal with capacitor's capacity, and therefore, the partial pressure of individual unit is uniform, and electric field is evenly distributed.In addition, the height Electricity getting device 41 is pressed to use second resistance and the first CBB electric capacity series connection partial pressure, it is small, low in energy consumption, solve voltage transformer Ferromagnetic resonance problem.

First gold utensil 31 is connected by the high-voltage arm 10 with second gold utensil 32, and second gold utensil 32 passes through The high-voltage arm 10 is connected with the 3rd gold utensil 33.Wherein, will be located at first gold utensil 31 and second gold utensil 32 it Between the high-voltage arm 10 be named as the first high-voltage arm, described between second gold utensil 32 and the 3rd gold utensil 33 High-voltage arm 10 is named as the second high-voltage arm.

Wherein, first wire connection terminal is connected with second wire connection terminal by the first high-voltage power transmission device, and Also connected by the resistance string of first high-voltage arm, first high-voltage arm is used for the voltage alternate to AB and carries out partial pressure.Institute The first terminals of the resistance string in the first high-voltage arm are stated by being electrically connected after low pressure divider resistance of connecting with the first wire connection terminal, The second terminals in first high-voltage arm are connected with the second wire connection terminal.3rd wiring of first high-voltage power transmission device End is electrically connected by the derided capacitors connected with the first wire connection terminal, and the 4th terminals of first high-voltage power transmission device pass through It is connected after the derided capacitors of series connection with the second wire connection terminal.

Wherein, second wire connection terminal is connected with the 3rd wire connection terminal by the second high-voltage power transmission device, and Also connected by the resistance string of second high-voltage arm, second high-voltage arm is used for the voltage alternate to CB and carries out partial pressure.Institute The second terminals of the resistance string in the second high-voltage arm are stated by being electrically connected after low pressure divider resistance of connecting with the 3rd wire connection terminal, First terminals of the resistance string in second high-voltage arm are electrically connected with second wire connection terminal for being used to be coupled B phase current potentials Connect.It is used to be coupled B phase current potentials with described after the derided capacitors that 3rd terminals of second high-voltage power transmission device pass through series connection The second wire connection terminal be electrically connected, with the after the derided capacitors that the 4th terminals of second high-voltage power transmission device pass through series connection Three wire connection terminals connect.

Wherein, the first wire connection terminal for being coupled A phase current potentials is provided with the first gold utensil 31, is set on the second gold utensil 32 The second wire connection terminal for being coupled B phase current potentials is useful for, the 3rd gold utensil 33 is provided with the 3rd terminals for being coupled C phase current potentials Son.

First supporting insulator 34 interacts with second supporting insulator 35, is used to support the high-voltage arm 10.Preferably, first supporting insulator 34 is connected with first gold utensil 31.Wherein, the first supporting insulator 34 and institute Stating the connection of the first gold utensil 31 can have a variety of, for example, it may be being connected by screw rod with middlewares such as nut, screws, also may be used To be by connecting in a manner of bonding, weld etc., can also be and be connected by groove with the combination of convex block etc..In this implementation In example, it is preferable that the first supporting insulator 34 is connected by screw bolts with the first gold utensil 31.Wherein it is preferred to first support is exhausted The bottom of acies is additionally provided with metal sleeve 40, during installation, easy to fixed and support high-voltage electric energy meter 30.

Second supporting insulator 35 interacts with first supporting insulator 34, is used to support the high-voltage arm 10.Preferably, second supporting insulator 35 is connected with the 3rd gold utensil 33.Wherein, the second supporting insulator 35 and institute Stating the connection of the 3rd gold utensil 33 can have a variety of, for example, it may be being connected by screw rod with middlewares such as nut, screws, also may be used To be by connecting in a manner of bonding, weld etc., can also be and be connected by groove with the combination of convex block etc..In this implementation In example, it is preferable that the second supporting insulator 35 is connected by screw bolts with the 3rd gold utensil 33.Wherein it is preferred to second support is exhausted The bottom of acies is additionally provided with metal sleeve 40, easy to fixed and support high-voltage electric energy meter 30 during installation.

First housing 36 is connected with first gold utensil 31, for protection setting in first housing 36 Component and the first current transformer 361 on first line plate 362, avoid being subject to electromagnetic interference, to improve the steady of its work Qualitative and measurement accuracy etc..Wherein, the connection mode of the first housing 36 and the first gold utensil 31 can have a variety of, in this implementation In example, it is preferable that the end of the first housing 36 and the first gold utensil 31 is bolted.

Wherein it is preferred to first switch power supply, the first metering converting unit and light are integrated with the first line plate 362 Electric transducer.

Wherein, operationally, voltage alternate AB is via being sent to after 11 partial pressure of resitstance voltage divider for the high-voltage electric energy meter 30 One metering converting unit, for measuring the voltage of A phases.The electric current of A phases is changed into one small after the sampling of the first current transformer 361 Current signal is sent to the first metering converting unit, for measuring the electric current of A phases.Voltage alternate AB is via high-voltage power transmission device 41 First switch power supply is sent to after partial pressure, a working power is provided for the first metering converting unit, ensures the need of its normal work Will.

Wherein, after voltage between AB is alternate is via 11 partial pressure of resitstance voltage divider, the voltage after its partial pressure may diminish to not To 1V.

Wherein, which is connected with the first metering converting unit, the first switch power supply and the first meter Converting unit connection is measured, high-voltage power transmission device 41 is connected with first switch power supply, and the metering conversion of resitstance voltage divider 11 and first is single Member connection.Wherein, the first metering converting unit is used to measure the parameters such as the voltage, electric current, power of A phases, and will obtain Continuous data be converted into optical signal through photoelectric converter, the second wiring board 371 is delivered to by optical fiber 39, calculates and closes first energy Consumption.

The second shielding cover 37 is connected with second gold utensil 32, for protection setting in the second shielding cover 37 Component on second wiring board 371, avoids being subject to electromagnetic interference, to improve the stability of its work and measurement accuracy etc.. Wherein, second shielding cover 37 and the connection mode of the second gold utensil 32 can have a variety of, in this present embodiment, it is preferable that the second screen Cover set 37 and the end of the second gold utensil 32 is bolted.

Wherein it is preferred to be integrated with second wiring board 371 second switch power supply, processing unit, photoelectric converter and Communication unit.

Wherein, the photoelectric converter be used for by first metering converting unit conveying optical signal be converted into electric signal transmission to Processing unit, meanwhile, which is used to the optical signal of the second metering converting unit conveying being converted into electric signal transmission To processing unit, so that processing unit handles the continuous data of A phases and the continuous data of C phases, calculate it and close first energy consumption, And it is transferred to terminal by communication unit (mode such as wired or wireless).

Wherein, voltage alternate AB is electric via second switch is sent to after 41 partial pressure of high-voltage power transmission device in the first high-voltage arm Source, in addition, voltage alternate CB is via second switch power supply is sent to after 41 partial pressure of high-voltage power transmission device in the second high-voltage arm Processing unit provides a working power, ensures the needs of its normal work.Wherein, second switch power supply connects with processing unit Connect, processing unit is connected with photovoltaic converter and communication unit.

3rd housing 38 is connected with the 3rd gold utensil 33, for protection setting in the 3rd housing 38 Component and the second current transformer 382 on tertiary circuit plate 381, avoid being subject to electromagnetic interference, to improve the steady of its work Qualitative and measurement accuracy etc..Wherein, the connection mode of the 3rd housing 38 and the 3rd gold utensil 33 can have a variety of, in this implementation In example, it is preferable that the end of the 3rd housing 38 and the 3rd gold utensil 33 is bolted.

Wherein it is preferred to the 3rd Switching Power Supply, the second metering converting unit and light are integrated with the tertiary circuit plate 381 Electric transducer.

Wherein, operationally, voltage alternate CB is via being sent to after 11 partial pressure of resitstance voltage divider for the high-voltage electric energy meter 30 Two metering converting units, for measuring the voltage of A phases.The electric current of C phases is changed into one small after the sampling of the second current transformer 382 Current signal is sent to the second metering converting unit, for measuring the electric current of C phases.Voltage alternate CB is via high-voltage power transmission device 41 The 3rd Switching Power Supply is sent to after partial pressure, a working power is provided for the second metering converting unit, ensures the need of its normal work Will.

Wherein, after voltage alternate CB is via 11 partial pressure of resitstance voltage divider, the voltage after its partial pressure may diminish to less than 1V.

Wherein, which is connected with the second metering converting unit, the 3rd Switching Power Supply and the second meter Converting unit connection is measured, high-voltage power transmission device 41 is connected with the 3rd Switching Power Supply, and the metering conversion of resitstance voltage divider 11 and second is single Member connection.Wherein, the second metering converting unit is used to measure the parameters such as the voltage, electric current, power of C phases, and will obtain Continuous data be converted into optical signal through photoelectric converter, the second wiring board 371 is delivered to by optical fiber 39, calculates and closes first energy Consumption.

In conclusion the utility model embodiment provides a kind of high-voltage arm and high voltage electric energy of more resistance series connection decompressions Table.The high-voltage arm includes：Resitstance voltage divider and insulating sleeve.Since the resistance that the resitstance voltage divider is connected is identical, because This, electric field is evenly distributed.In addition, the resitstance voltage divider samples voltage by the way of the series connection of multiple small resistors, volume It is small, it is low in energy consumption, evade the risk using ferromagnetic resonance caused by voltage transformer sampled voltage.In addition, it is filled in insulation Insulating wall is formed at multiple first hollow-out slot bores that filler in casing can be on first circuit board, it is alternate to add two Creepage distance, solve axial high-tension resistive because creeping discharge that filler surface not bonding and being formed and bubble-discharge are asked Topic, improves two alternate insulation performances.The utility model possesses：Measuring accuracy height, good reliability, safety coefficient are high, insulation Many advantages, such as effect is good, small, low in energy consumption, cost is low, easy to use, adaptable.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.

Claims (10)

1. A kind of 1. high-voltage arm of more resistance series connection decompression, it is characterised in that applied in high-voltage electric energy meter, the high-voltage arm bag Include：Resitstance voltage divider, the resitstance voltage divider include：First circuit board and be installed on the first circuit board multiple first Resistance, the multiple first resistor are sequentially connected in series to form resistance string, and the first resistor scribbles the low pressure of insulating materials for surface Resistance.
2. 2. high-voltage arm according to claim 1, it is characterised in that first electricity is not installed with the first circuit board The region of resistance is provided with multiple first hollow-out slot bores.
3. 3. high-voltage arm according to claim 1, it is characterised in that per adjacent two first in the multiple first resistor Resistance is connected by copper foil, and multiple copper foils are arranged on the first circuit board.
4. 4. high-voltage arm according to claim 1, it is characterised in that form multiple first resistors in the resistance string It is S-type to be arranged on the first circuit board.
5. 5. high-voltage arm according to claim 1, it is characterised in that it is spacing that one end of the first circuit board is provided with first Part, the other end of the first circuit board are provided with the second locating part.
6. 6. high-voltage arm according to claim 2, it is characterised in that the high-voltage arm further includes：Insulating sleeve, the resistance Divider is arranged in the insulating sleeve, described to fill out filled with the filler being made of insulating materials in the insulating sleeve Thing is filled to be used to form insulating wall at multiple first hollow-out slot bores on the first circuit board.
7. 7. high-voltage arm according to claim 6, it is characterised in that the insulating sleeve is externally provided with multiple full skirts, the umbrella Skirt is the annular relief being made of insulating materials.
8. A kind of 8. high-voltage electric energy meter, it is characterised in that including：For being coupled the first wire connection terminal of A phase current potentials, for being coupled B Such as claim 1-7 of second wire connection terminal of phase current potential, the 3rd wire connection terminal for being coupled C phase current potentials and two is any one The high-voltage arm of more resistance series connection decompression described in, two high-voltage arms are the first high-voltage arm and the second high-voltage arm；Described One wire connection terminal is connected with second wire connection terminal by the resistance string of first high-voltage arm, and first high-voltage arm is used for The voltage alternate to AB carries out partial pressure；3rd wire connection terminal passes through second high-voltage arm with second wire connection terminal Resistance string connects, and second high-voltage arm is used for the voltage alternate to CB and carries out partial pressure.
9. 9. high-voltage electric energy meter according to claim 8, it is characterised in that the high-voltage electric energy meter further includes：First gold utensil, Second gold utensil, the 3rd gold utensil, the first supporting insulator and the second supporting insulator, are provided with described first on first gold utensil Wire connection terminal, is provided with second wire connection terminal on second gold utensil, being provided with the described 3rd on the 3rd gold utensil connects Line terminals, first supporting insulator are connected with first gold utensil, second supporting insulator and the 3rd gold utensil Connection.
10. 10. high-voltage electric energy meter according to claim 9, it is characterised in that the high-voltage electric energy meter further includes：First shielding Set, second shielding cover and the 3rd housing, first housing are connected with first gold utensil, the second shielding cover and institute The connection of the second gold utensil is stated, the 3rd housing is connected with the 3rd gold utensil.