CN208873598U - A kind of outdoor three-phase electronic type voltage transformer - Google Patents
A kind of outdoor three-phase electronic type voltage transformer Download PDFInfo
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- CN208873598U CN208873598U CN201821732464.1U CN201821732464U CN208873598U CN 208873598 U CN208873598 U CN 208873598U CN 201821732464 U CN201821732464 U CN 201821732464U CN 208873598 U CN208873598 U CN 208873598U
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Abstract
The utility model relates to electric system high-tension measurement or relay protection device, specifically a kind of outdoor three-phase electronic type voltage transformer.Including three single-phase high voltage capacitor pillars on mounting base and setting mounting base, the outside of each single-phase high voltage capacitor pillar is arranged with electrically insulating silicone rubber set, and internal envelope is equipped with high-voltage capacitance C1, low-voltage capacitance C2, HV Terminal and a secondary low-voltage terminal, wherein high-voltage capacitance C1Both ends connect with a HV Terminal and secondary low-voltage terminal by conducting wire, the secondary low-voltage terminal in three single-phase high voltage capacitor pillars is sequentially connected by conducting wire, low-voltage capacitance C2The bottom and one end for being sealed and placed in a wherein single-phase high voltage capacitor pillar are connect with secondary low-voltage terminal, low-voltage capacitance C2Both ends lead drawn by mounting base.The utility model has the function of the characteristics of small in size, low in energy consumption, insulation stablizes, is safe and reliable, measurement range is wide, iron-free magnetic saturation, advanced, use flexibly.
Description
Technical field
The utility model relates to electric system high-tension measurement or relay protection device, specifically a kind of outdoor three-phase electricity
Minor voltage transformer.
Background technique
Electronic type voltage transformer is to meet modern power systems middle/high-voltage electrical appliance equipment to intelligence, modularization, small-sized
Change, is multi-functional, the needs of one of the key equipment that non-maintaining direction is developed and Automation of Electric Systems, digital development.It is existing
The microcomputer composite measurement protective device and instrument and meter of generationization no longer need mutual inductor offer energy to carry out work, only need mutual inductor will
Primary voltage information is complete, in time, accurately acquires and sends, it is only necessary to the voltage signal of several volts and minimum power
It is just able to satisfy its interface requirements, traditional electromagnetic potential transformer is difficult to be done directly computer technology to voltage complete information
Carry out the requirement of digitized processing, it is difficult to realize the on-line monitoring that power grid changes electrical parameter.It is automatic to hinder electric system
Change and develops to higher level.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of outdoor three-phase electronic type voltage transformer, with
Solve the requirement that conventional electromagnetic voltage transformer is not able to satisfy Automation of Electric Systems, digitized processing development.
To achieve the goals above, the technical solution adopted in the utility model is:
A kind of outdoor three-phase electronic type voltage transformer, including three lists on mounting base and the setting mounting base
Phase high-voltage capacitance pillar, the outside of each single-phase high voltage capacitor pillar are arranged with electrically insulating silicone rubber set, and internal envelope is equipped with
High-voltage capacitance C1, low-voltage capacitance C2, HV Terminal and a secondary low-voltage terminal, wherein high-voltage capacitance C1Both ends pass through conducting wire
It is connect with a HV Terminal and secondary low-voltage terminal, the secondary low-voltage terminal in three single-phase high voltage capacitor pillars passes through
Conducting wire is sequentially connected, the low-voltage capacitance C2It is sealed and placed in the wherein bottom and one end of a single-phase high voltage capacitor pillar and institute
State the connection of secondary low-voltage terminal, the low-voltage capacitance C2Both ends lead drawn by the mounting base.
HV Terminal and secondary low-voltage terminal are respectively arranged at the upper and lower of the single-phase high voltage capacitor pillar
End, the high-voltage capacitance C1Between a HV Terminal and secondary low-voltage terminal.
The high-voltage capacitance C1Both ends outlet bolt on the outside of be enclosed with semi-conductive screen rubber strip.
The mounting base is hollow structure and side or bottom are equipped with measurement cable, the low-voltage capacitance C2Both ends
Lead is drawn by measurement cable.
The measurement cable is double shielded twisted pair cable, and wherein inner shield line is anti-interference ground connection, and external shield line connects described
Protective grounding is led to after mounting base.
The conducting wire for connecting each secondary low-voltage terminal is placed in the cavity of the mounting base.
The high-voltage capacitance C1For high-pressure resistant ceramic material, the low-voltage capacitance C2For ceramic grain capacitor.
Three single-phase high voltage capacitor pillar "-" type arrangements, the low-voltage capacitance C2It is sealed and placed in positioned at the single-phase of outside
In high-voltage capacitance pillar.
Single-phase high voltage capacitor pillar cylindrical shape made of poured with epoxy resin, and with the insulating silicon rubber
Gum cover is combined into insulation system, and the outer surface of the electrically insulating silicone rubber set is equipped with the insulation that size interval is alternately laid from top to bottom
Full skirt.
The high-voltage capacitance C1, a HV Terminal and secondary low-voltage terminal the single-phase height is sealed and placed in by once-cast
In voltage capacitance pillar, the low-voltage capacitance C2The bottom of the single-phase high voltage capacitor pillar is sealed and placed in by second pouring.
The utility model have the following advantages that and the utility model has the advantages that
1. low in energy consumption small in size: the utility model integrally uses epoxy resin and the compound insulation system of silicon rubber, volume
It is small, light-weight, space can be effectively saved, micro power consumption, power savings are very significant, the feature with environment-friendly products.
2. insulation is stablized, safe and reliable: high-low pressure component periphery has uniform insulation distance inside the utility model, interior
External electrical field is visibly homogeneous, and outer surface creepage distance is big, and interiors of products does not have iron core, is not in saturated phenomenon.Even if
High current will not be generated when being second short circuit, the danger of no overcurrent breakdown will not generate ferromagnetic resonance, guarantee apparatus insulated
Stablize, runs safer.
3. measurement range is wide: the utility model uses principle of capacitive divider form, and capacitor is made of high-pressure resistant ceramic material,
It is big to adapt to operating ambient temperature range, the measurement range of linearity is wide, the linearity is good, and class of accuracy can reach 0.5 grade.
4. function is advanced, flexible in application: the utility model function is advanced, can quickly, completely, accurately pass primary information
Give computer carry out data processing or with digitizer meter apparatus, realize metering, measuring state monitoring.And output is small
Voltage signal easily protects equipment interface with digital instrument, microcomputer measuring and controlling, and without carrying out two times transfer, application is very clever
It is living.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the utility model；
Fig. 2 is the external structure structural schematic diagram of the utility model；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the top view of Fig. 2；
Fig. 5 is the electrical schematic diagram of the utility model.
In figure: 1 is high-voltage capacitance C1, 2 be low-voltage capacitance C2, 3 be a HV Terminal, and 4 be secondary low-voltage terminal, and 5 be peace
Bottom plate is filled, 6 be semi-conductive screen rubber strip, and 7 be parachute skirt, and 8 is measure cable, and 9 be single-phase high voltage capacitor pillar, and 10 be exhausted
Edge silicone rubber sleeve.
Specific embodiment
In order to keep the purpose of this utility model, technical solution and advantage clearer, with reference to the accompanying drawing and it is embodied
The utility model is described in detail in example.
As shown in Figs. 1-5, a kind of indoor three-phase electronic voltage mutual inductor provided by the utility model, including mounting base
5 and three single-phase high voltage capacitor pillars 9 being mounted on mounting base 5, the outside of each single-phase high voltage capacitor pillar 9 is arranged with
Electrically insulating silicone rubber set 10, internal envelope are equipped with high-voltage capacitance C11, low-voltage capacitance C22, a HV Terminal 3 and secondary low-voltage terminal
4, wherein high-voltage capacitance C11 both ends are connect with a HV Terminal 3 and secondary low-voltage terminal 4 respectively by conducting wire, three lists
Secondary low-voltage terminal 4 in phase high-voltage capacitance pillar 9 is sequentially connected by conducting wire, low-voltage capacitance C22 be sealed and placed in it is wherein one single-phase
The lower end of high-voltage capacitance pillar 9, and one end is connect with secondary low-voltage terminal 4, low-voltage capacitance C22 both ends lead is by mounting base
5 draw.
HV Terminal 3 and secondary low-voltage terminal 4 are respectively arranged at the upper and lower end of single-phase high voltage capacitor pillar 9, high pressure
Capacitor C11 between a HV Terminal 3 and secondary low-voltage terminal 4, high-voltage capacitance C1Package on the outside of 1 both ends outlet bolt
There is semi-conductive screen rubber strip 6.
Mounting base 5 is hollow structure, and the conducting wire for connecting each secondary low-voltage terminal 4 is placed in the cavity of mounting base 5.
The side or bottom of mounting base 5 are equipped with measurement cable 8, low-voltage capacitance C2The lead at 2 both ends is drawn by measurement cable 8.Measurement
Cable 8 is double shielded twisted pair cable, and wherein inner shield line is anti-interference ground connection, and external shield line leads to guarantor after connecing mounting base 5
Shield ground connection.
Three 9 "-" type of single-phase high voltage capacitor pillar arrangements, low-voltage capacitance C22 are sealed and placed in the single-phase high voltage electricity positioned at outside
Hold in pillar 9.High-voltage capacitance C11 is high-pressure resistant ceramic material, low-voltage capacitance C22 be ceramic grain capacitor, because resistance to using ceramic material
Press that grade is high, structure is simple, configuration is, it can be achieved that primary voltage is converted into proportional and phase is identical with primary voltage in proportion
Small voltage signal, micro power consumption, power savings are very significant.
9 cylindrical shape made of poured with epoxy resin of single-phase high voltage capacitor pillar, and 10 are covered with electrically insulating silicone rubber
It is combined into insulation system, the outer surface of electrically insulating silicone rubber set 10 is equipped with the parachute skirt 7 that size interval is alternately laid from top to bottom,
Guarantee that interiors of products component periphery has uniform insulation distance, small product size is smaller, and light-weight, inside and outside electric field is more equal
It is even, and surface creepage distance between high-pressure side and low-pressure side is effectively increased, improve the dielectric level of product.Electrically insulating silicone rubber set 10
With good hydrophobicity, greatly increase pollution flashover voltage, the generation of pollution flashover failure can be effectively prevented, have it is anti-aging and
Anti creepage trace performance.
High-voltage capacitance C11, a HV Terminal 3 and secondary low-voltage terminal 4 are sealed and placed in single-phase high voltage electricity by once-cast
Hold in pillar 9, low-voltage capacitance C22 are sealed and placed in the bottom of single-phase high voltage capacitor pillar 9 by second pouring.High-voltage capacitance C11 pressure resistance
The class of insulation is high, low-voltage capacitance C22 be after with second pouring structure, installation, debugging are flexible and convenient.Measure cable 8 and low tension
Hold C22 are connected with secondary low-voltage terminal 4 and mounting base 5, using being poured again by low-voltage capacitance C22 and secondary low-voltage terminal 4 it is solid
It is enclosed in pour mass bottom, and is drawn with the measurement cable 8 of band signal, guarantees small voltage signal being directly sent to acquisition unit,
It is converted into number in acquisition unit and determines signal, improves the stability and accuracy of equipment.
In the embodiments of the present invention, rated primary voltage is 10/ √ 3kV, and specified secondary output is zero sequence, analog quantity
For 6.5/3V.Zero sequence: (10kV/ √ 3)/(6.5V/3), class of accuracy are 3 grades (cable containing 15-meter line), shelf depreciation: 10pC,
14.4kV, -40 DEG C of environment temperature~70 DEG C.Implementation: capacitance partial pressure.Load impedance >=5 megaohm.New-style electronic voltage is mutual
Sensor requirement: secondary output is small voltage signal, is not necessarily to two times transfer, is set with digital instrument, microcomputer control with can be convenient
Standby interface realizes the function of metering, control and data transmission, eliminates conventional electromagnetic voltage transformer secondary short circuit to electric power
System equipment and personal safety bring potential faults.
The manufacturing process of the utility model is:
The utility model is made of three single-phase high voltage capacitor pillars 9.Firstly, casting single-phase high voltage capacitor pillar 9, by two
One end of root bare copper wire is welded in the bottom of a HV Terminal 3 and secondary low-voltage terminal 4 with scolding tin respectively, and the other end curvesCircle, product high-voltage capacitance C1Bare copper wire is welded under 1 one end and 3 embedded nut of HV TerminalCircle screw
It is fixed together, then again by high-voltage capacitance C1Bare copper wire is welded under 1 other end and 4 embedded nut of secondary low-voltage terminal
Circle is screwed together.Use semi-conductive screen rubber strip 6 by high-voltage capacitance C again1The package closing of 1 both ends outlet bolt.
Body assembling finishes clean with alcohol wipe, is transferred in mold, utilizes being embedded in for a HV Terminal 3 and secondary low-voltage terminal 4
Nut is fixed with mold, adjusts insulation distance, forms integral structure using epoxide resin vacuum casting solidification.Strict control is high
Voltage capacitance C11 capacitance keeps the capacitance of three single-phase high voltage capacitor pillars 9 as identical as possible, and difference does not surpass 0.2%, matches
At one group, for being assembled into a threephase potential transformer.Same group of three single-phase high voltage capacitor pillars 9 are fixed with bolt
With on mounting base 5.By the embedded nut set of three 9 secondary low-voltage terminals 4 of single-phase high voltage capacitor pillarSebific duct in high pressure
'sBare copper wire is together in series, and draws any and low-voltage capacitance C22 one end is welded together lead-out wire and is denoted as da, low tension
Hold C22 other end lead-out wire is denoted as dn and is connected with product mounting base 5.Measurement cable 8 is double shielded twisted pair cable, interior screen
It covers for anti-interference ground connection, external shield line connects bottom plate and leads to protective grounding.By adjusting low-voltage capacitance C22 capacitance can be realized
Primary voltage is converted into the identical small voltage signal of and phase proportional to primary voltage, micro power consumption power savings are very aobvious
It writes.Secondary lead-out wire guarantees small voltage signal being directly sent to acquisition unit with 1.5 meters of double shielded twisted pair cables, in acquisition unit
In be converted into digital signal, improve the stability and accuracy of equipment.After semi-finished product after assembling are qualified after tested.
9 pour mass structure of single-phase high voltage capacitor pillar is cylindrical shape, and outside is compounded with electrically insulating silicone rubber set 10, electrically insulating silicone rubber set
10 outer surface is equipped with the parachute skirt 7 that size interval is alternately laid from top to bottom, and it is equal to guarantee that interiors of products component periphery has
Even insulation distance, small product size is smaller, light-weight, and inside and outside electric field is more uniform, and effectively increases high-pressure side and low-pressure side
Between surface creepage distance, improve the dielectric level of product.Three single-phase high voltage capacitor pillars 9 are bolted to a band
On the mounting base 5 of mounting hole, the installation with high-tension apparatus is realized, product can be optionally mounted at different location.
The utility model is corbeling three-phase electronic voltage mutual inductor, is one designed fully according to national standard
Primary voltage is converted into and phase proportional to primary voltage using principle of capacitive divider using quality material by kind new product
Identical small voltage signal, send to computer carry out data processing or with the devices such as digital instrumentation, realize metering, measurement,
The functions such as protection.
The utility model has small in size, low in energy consumption, insulation surely using epoxy resin and silicon rubber composite insulation structure
The characteristics of fixed, safe and reliable, measurement range is wide, iron-free magnetic saturation, function are advanced, use flexibly, further improves power train
System equipment automatization, digitized level.
The foregoing is merely the embodiments of the present invention, are not intended to limit the protection scope of the utility model.It is all
Any modification, equivalent substitution and improvement made within spirit of the present utility model and principle, extension etc., are all contained in this reality
With in novel protection scope.
Claims (10)
1. a kind of outdoor three-phase electronic type voltage transformer, which is characterized in that including mounting base (5) and the setting installation bottom
The outside of three single-phase high voltage capacitor pillars (9) on plate (5), each single-phase high voltage capacitor pillar (9) is arranged with insulation
Silicone rubber sleeve (10), internal envelope are equipped with high-voltage capacitance C1(1), low-voltage capacitance C2(2), a HV Terminal (3) and secondary low-voltage
Terminal (4), wherein high-voltage capacitance C1(1) both ends are connected by conducting wire and a HV Terminal (3) and secondary low-voltage terminal (4)
It connects, the secondary low-voltage terminal (4) in three single-phase high voltage capacitor pillars (9) is sequentially connected by conducting wire, the low tension
Hold C2(2) the wherein bottom and one end of a single-phase high voltage capacitor pillar (9) and the secondary low-voltage terminal (4) are sealed and placed in
Connection, the low-voltage capacitance C2(2) both ends lead is drawn by the mounting base (5).
2. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that a HV Terminal
(3) and secondary low-voltage terminal (4) is respectively arranged at the upper and lower end of the single-phase high voltage capacitor pillar (9), the high-voltage capacitance C1
(1) between a HV Terminal (3) and secondary low-voltage terminal (4).
3. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that the high-voltage capacitance C1(1)
Both ends outlet bolt on the outside of be enclosed with semi-conductive screen rubber strip (6).
4. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that the mounting base (5)
For hollow structure and side or bottom are equipped with measurement cable (8), the low-voltage capacitance C2(2) lead at both ends is by measurement cable
(8) it draws.
5. outdoor three-phase electronic type voltage transformer according to claim 4, which is characterized in that the measurement cable (8)
For double shielded twisted pair cable, wherein inner shield line is anti-interference ground connection, and external shield line leads to guarantor after connecing the mounting base (5)
Shield ground connection.
6. outdoor three-phase electronic type voltage transformer according to claim 4, which is characterized in that connect each secondary low-voltage end
The conducting wire of sub (4) is placed in the cavity of the mounting base (5).
7. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that the high-voltage capacitance C1(1)
For high-pressure resistant ceramic material, the low-voltage capacitance C2It (2) is ceramic grain capacitor.
8. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that three single-phase high voltages
The arrangement of capacitor pillar (9) "-" type, the low-voltage capacitance C2(2) it is sealed and placed in the single-phase high voltage capacitor pillar (9) in outside.
9. outdoor three-phase electronic type voltage transformer according to claim 1, which is characterized in that the single-phase high voltage capacitor
Pillar (9) cylindrical shape made of poured with epoxy resin, and insulation knot is combined into the electrically insulating silicone rubber set (10)
Structure, the outer surface of the electrically insulating silicone rubber set (10) are equipped with the parachute skirt (7) that size interval is alternately laid from top to bottom.
10. outdoor three-phase electronic type voltage transformer according to claim 9, which is characterized in that the high-voltage capacitance C1
(1), a HV Terminal (3) and secondary low-voltage terminal (4) are sealed and placed in the single-phase high voltage capacitor pillar (9) by once-cast
It is interior, the low-voltage capacitance C2(2) bottom of the single-phase high voltage capacitor pillar (9) is sealed and placed in by second pouring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821732464.1U CN208873598U (en) | 2018-10-25 | 2018-10-25 | A kind of outdoor three-phase electronic type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821732464.1U CN208873598U (en) | 2018-10-25 | 2018-10-25 | A kind of outdoor three-phase electronic type voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208873598U true CN208873598U (en) | 2019-05-17 |
Family
ID=66470850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821732464.1U Active CN208873598U (en) | 2018-10-25 | 2018-10-25 | A kind of outdoor three-phase electronic type voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208873598U (en) |
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2018
- 2018-10-25 CN CN201821732464.1U patent/CN208873598U/en active Active
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