CN208433305U - A kind of full cast-type three-phase and four-line combination transformer - Google Patents
A kind of full cast-type three-phase and four-line combination transformer Download PDFInfo
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- CN208433305U CN208433305U CN201820923204.6U CN201820923204U CN208433305U CN 208433305 U CN208433305 U CN 208433305U CN 201820923204 U CN201820923204 U CN 201820923204U CN 208433305 U CN208433305 U CN 208433305U
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- 238000004804 winding Methods 0.000 claims abstract description 54
- 230000007935 neutral effect Effects 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 230000006698 induction Effects 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 57
- 229910052802 copper Inorganic materials 0.000 claims description 57
- 239000010949 copper Substances 0.000 claims description 57
- 238000009413 insulation Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 230000005350 ferromagnetic resonance Effects 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 5
- 238000009422 external insulation Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Transformers For Measuring Instruments (AREA)
Abstract
The utility model discloses a kind of full cast-type three-phase and four-line combination transformers, including voltage cell, Current Mutual Inductance unit, binding post unit and shell, mutual induction of voltage unit includes three voltage transformers arranged side by side, neutral point N of three voltage transformers is grounded and once resonance eliminator of connecting between ground, Current Mutual Inductance unit includes three current transformers arranged side by side, the current ferric core central axis of current transformer is arranged along the longitudinal direction, the voltage core center axis of voltage transformer is arranged along the longitudinal direction, voltage iron core is located at below current ferric core and corresponds with current ferric core；The utility model can effectively eliminate ferromagnetic resonance caused by voltage transformer, occur to avoid the occurrence of the safety accident of voltage transformer external insulation breakdown, simultaneously, the overcurrent that system voltage flows through mutual inductor winding in single-phase earthing can also be limited, burning for voltage transformer is avoided, the security reliability of combination mutual inductance is effectively improved.
Description
Technical field
The utility model relates to high-voltage electric energy measurement equipment technical field more particularly to a kind of full cast-type three-phase and four-line groups
Close mutual inductor.
Background technique
Combined instrument transformer, the combination of actually multiple voltage transformers and/or multiple current transformers, be in order to
Meet the product that high voltage supply user designs in the requirement that high-pressure side is measured, can be a voltage transformer and one
The combination of current transformer can be the combination of multiple voltage transformers and multiple current transformers for measuring single-phase power,
By the three phase power based on two watts in method measurement three-phase line.
Wherein, in existing three-phase and four-line combination transformer, a neutral point of voltage transformer is to be cast in cavity
Interior, mutual inductor neutral point can not be grounded, easily generation ferromagnetic resonance, the case where puncturing inside and outside voltage transformer and putting generation,
Meanwhile electric system is flowed through voltage transformer winding coil overcurrent, will easily be burnt in single-phase earthing or arc grounding
Voltage transformer, or even transformer explosion is caused, security risk is huge.
Utility model content
The purpose of the utility model is to provide a kind of full cast-type three-phase and four-line combination transformers, can effectively eliminate voltage
Ferromagnetic resonance caused by mutual inductor, so that the safety accident for avoiding the occurrence of the breakdown of voltage transformer external insulation occurs, meanwhile, also
The overcurrent that system voltage flows through mutual inductor winding in single-phase earthing can be limited, burning for voltage transformer is avoided, effectively mentions
The security reliability of height combination mutual inductance.
The technical solution adopted in the utility model are as follows:
A kind of full cast-type three-phase and four-line combination transformer, including mutual induction of voltage unit, Current Mutual Inductance unit, connecting terminal
Unit and shell, mutual induction of voltage unit and Current Mutual Inductance unit are cast for totally enclosed pour mass, pour mass by insulating materials
It is arranged in shell, binding post unit is arranged on shell；
Binding post unit includes voltage primary connection terminal, voltage secondary connection terminal, neutral conductor connecting terminal, electric current
Input terminal, outlet terminal of electric current, the secondary input terminal of electric current and electric current secondary outlet terminal；
Mutual induction of voltage unit includes three voltage transformers arranged side by side, the primary winding coils of three voltage transformers
Head end is separately connected voltage primary connection terminal, and the primary winding coils end of three voltage transformers, which is electrically connected to each other, to be followed by
Ground, the primary winding coils end electrical connection node of three voltage transformers are neutral point a N, a neutral point N and ground
Between connect once resonance eliminator；The secondary winding coil head end of three voltage transformers is separately connected voltage secondary connection end
Son, the secondary winding coil end of three voltage transformers access neutral conductor connecting terminal after being electrically connected to each other；
Current Mutual Inductance unit includes three current transformers arranged side by side, the primary winding coils of three current transformers
Head end is separately connected input terminal of electric current, and it is primary that the primary winding coils end of three current transformers is separately connected electric current
Outlet terminal, the secondary winding coil head end of three current transformers are separately connected the secondary input terminal of electric current, and three electric currents are mutual
The secondary winding coil end of sensor is separately connected electric current secondary outlet terminal.
The current transformer includes current ferric core, and the central axis of current ferric core is arranged along the longitudinal direction, electric current iron
Core is equipped with the electric current inner hole of front and back perforation, and the primary winding coils of current transformer pass through electric current inner hole and are wrapped in electric current iron
Core lower part, the secondary winding coil of current transformer pass through electric current inner hole and circumferentially wound along current ferric core；
The voltage transformer includes voltage iron core, and the central axis of voltage iron core is arranged along the longitudinal direction, voltage iron
Core is located at below current ferric core and corresponds with current ferric core, and voltage iron core is equipped with the voltage inner hole of front and back perforation, voltage
The primary winding coils of mutual inductor pass through voltage inner hole and wound on voltage iron core top, the secondary winding coils of voltage transformer
Across voltage inner hole and wound on the primary winding coils outer layer of voltage transformer.
Described input terminal of electric current is inlet wire copper bar, and outlet terminal of electric current is outlet copper bar, inlet wire copper bar
The front and rear sides of current ferric core are separately positioned on outlet copper bar.
Insulation Anti-theft cover is arranged with outside the inlet wire copper bar and outlet copper bar.
The insulation Anti-theft cover includes being equipped with lead sealing with inlet wire copper bar or the matched cover of outlet copper bar, the head end of cover
The end in hole, cover is equipped with outlet hole；Inlet wire copper bar and corresponding outlet copper bar, which are arranged between the lead seal hole of insulation Anti-theft cover, to be led to
Cross lead sealing line connection.
The cover end is the taper that diameter is gradually reduced.
The utility model has the following beneficial effects:
(1) by increasing neutral point N of voltage transformer, and a neutral point N is drawn into pour mass external ground, simultaneously
It installs a resonance eliminator additional between neutral point and ground, ferromagnetic resonance caused by voltage transformer is eliminated, so as to avoid voltage
The inside and outside insulation breakdown of mutual inductor, while the overcurrent that system voltage flows through mutual inductor winding in single-phase earthing is limited, avoid voltage
Mutual inductor is burnt, and improves the safe and reliable operation of combination transformer；
(2) by changing the arrangement mode of current transformer and voltage transformer, and change current transformer and voltage is mutual
The position of winding coil on sensor again carries out pour mass structure under the premise of not influencing properties of product, makes pour mass body
Product reduces 40%-50%, not only reduces small product size, compact-sized, reduces transhipment and installation burden, and reduces mould material and use
Amount reduces material cost；
(3) by inlet wire copper bar and occurring being arranged insulation Anti-theft cover on copper bar, it is capable of the generation of pre- preventing fraudulent use of electricity behavior,
And can prevent copper bar both ends from overlapping the security risk to form short circuit composition, improve the safety of combination transformer and reliable
Property, ensure the Electrical Safety of user.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic diagram of internal structure of pour mass；
Fig. 3 is the circuit diagram of the utility model.
Description of symbols:
1, shell；2, current ferric core；3, the secondary winding coil of current transformer；4, the first winding line of current transformer
Circle；5, voltage iron core；6, the primary winding coils of voltage transformer；7, the secondary winding coil of voltage transformer.
Specific embodiment
The utility model in order to better understand with reference to the accompanying drawing does furtherly the technical solution of the utility model
It is bright.
As depicted in figs. 1 and 2, a kind of full cast-type three-phase and four-line combination transformer disclosed by the utility model, including electricity
Mutual inductance unit, Current Mutual Inductance unit, binding post unit and shell 1 are pressed, mutual induction of voltage unit and Current Mutual Inductance unit pass through exhausted
Edge material is cast for totally enclosed pour mass, and pour mass is arranged in shell 1, and binding post unit is arranged on shell 1.
Binding post unit includes voltage primary connection terminal, voltage secondary connection terminal, neutral conductor connecting terminal, electric current
Input terminal, outlet terminal of electric current, the secondary input terminal of electric current and electric current secondary outlet terminal；
Input terminal of electric current includes three, respectively copper bar AP1, copper bar BP1 copper bar CP1, leading-out terminal of electric current
Attached bag includes three, respectively copper bar AP2, copper bar BP2 copper bar CP2, and the secondary input terminal of electric current includes three, respectively terminal
As1, terminal bs1 and terminal cs1, electric current secondary outlet terminal include three, respectively terminal as2, terminal bs2 and terminal cs2,
Neutral conductor connecting terminal is terminal n, and terminal of voltage includes three, and copper bar AP1, copper bar BP1 are respectively adopted in the present embodiment
Copper bar CP1 substitution, voltage secondary terminals include three, respectively terminal a, terminal b and terminal c.
Mutual induction of voltage unit includes three voltage transformers arranged side by side, and three voltage transformer structures are identical, and every
Voltage transformer includes voltage iron core 5, and the central axis of voltage iron core 5 is arranged along the longitudinal direction, and voltage iron core 5 is located at electric current iron
2 lower section of core is simultaneously corresponded with current ferric core 2, voltage inner hole of the voltage iron core 5 equipped with front and back perforation, and the one of voltage transformer
Secondary winding coil 6 passes through voltage inner hole and wound on 5 top of voltage iron core, and the secondary winding coil 7 of voltage transformer passes through electricity
Press inner hole and wound on 6 outer layer of the primary winding coils of voltage transformer.
Current Mutual Inductance unit includes three current transformers arranged side by side, and three current transformer structures are identical, and every
Current transformer includes current ferric core 2, and the central axis of current ferric core 2 is arranged along the longitudinal direction, before current ferric core 2 is equipped with
The primary winding coils 4 of the electric current inner hole penetrated through afterwards, current transformer pass through electric current inner hole and are wrapped in 2 lower part of current ferric core,
The secondary winding coil 3 of current transformer passes through electric current inner hole and circumferentially wound along current ferric core 2；
The front and rear sides of each current transformer are respectively equipped with an inlet wire copper bar and outlet copper bar, inlet wire copper bar and outlet
Insulation Anti-theft cover (attached drawing does not indicate) is arranged with outside copper bar, insulation Anti-theft cover includes matched with inlet wire copper bar or outlet copper bar
Cover, the front end of cover are equipped with lead seal hole, and the end of cover is the taper that diameter is gradually reduced, and cover end diameter minimum goes out to open
Equipped with outlet hole, it is arranged on two opposite inlet wire copper bars and outlet copper bar between the lead seal hole of insulation Anti-theft cover and passes through lead sealing
Line connection.
Antitheft insulating boot is capable of the generation of pre- preventing fraudulent use of electricity behavior, and can prevent copper bar both ends from overlapping to form short circuit composition
Security risk improves the safety and reliability of combination transformer, has ensured the Electrical Safety of user.
The utility model by change current transformer and voltage transformer arrangement mode, and change current transformer and
The position of winding coil on voltage transformer again carries out pour mass structure under the premise of not influencing properties of product, makes to pour
Injection body volume reduces 40%-50%, not only reduces small product size, compact-sized, reduces transhipment and installation burden, and reduces casting material
Expect usage amount, reduces material cost.By being arranged insulation Anti-theft cover, it is capable of the generation of pre- preventing fraudulent use of electricity behavior, and copper can be prevented
Row both ends overlap the security risk to form short circuit composition, improve the safety and reliability of combination transformer, have ensured user
Electrical Safety.
As shown in figure 3, copper bar AP1 copper bar AP2 is connected in the A circuitry phase of mains terminal, copper bar BP1 copper bar BP2 is connected on
In the B circuitry phase of mains terminal, copper bar CP1 copper bar CP2 is connected in the C circuitry phase of mains terminal.Three voltage transformers it is primary
6 head end of winding coil is separately connected copper bar AP1, copper bar AP2 and copper bar AP3,6 end of primary winding coils of three voltage transformers
End is grounded after being electrically connected to each other, and 6 end of the primary winding coils electrical connection node of three voltage transformers is neutral point N,
Neutral point N contacts pour mass external ground and once resonance eliminator of connecting between ground；The secondary winding line of three voltage transformers
It encloses 7 head ends and is separately connected terminal a, terminal b and terminal c, 7 end of secondary winding coil of three voltage transformers mutually electrically connects
Neutral conductor connecting terminal n is accessed after connecing.
By increasing neutral point N of voltage transformer, and by a neutral point N extraction pour mass external ground, while
It installs a resonance eliminator between neutral point and ground additional, ferromagnetic resonance caused by voltage transformer can be eliminated, so as to avoid voltage
The inside and outside insulation breakdown of mutual inductor, while the overcurrent that system voltage flows through mutual inductor winding in single-phase earthing is limited, avoid voltage
Mutual inductor is burnt, and improves the safe and reliable operation of combination transformer.
4 head end of primary winding coils of three current transformers is separately connected copper bar AP1, copper bar AP2 and copper bar AP3, and three
4 end of primary winding coils of platform current transformer is separately connected copper bar AP2, copper bar BP2 copper bar CP2, three current transformers
3 head end of secondary winding coil be separately connected terminal as1, terminal bs1 and terminal cs1, the secondary winding of three current transformers
3 end of coil is separately connected terminal as2, terminal bs2 and terminal cs2.
The utility model can effectively eliminate ferromagnetic resonance caused by voltage transformer, to avoid the occurrence of voltage transformer
The safety accident of external insulation breakdown occurs, simultaneously, additionally it is possible to limit system voltage in single-phase earthing and flow through mutual inductor winding
Overcurrent avoids burning for voltage transformer, effectively improves the security reliability of combination mutual inductance.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that,
It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features
It is equivalently replaced, and these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (6)
1. a kind of full cast-type three-phase and four-line combination transformer, it is characterised in that: including mutual induction of voltage unit, Current Mutual Inductance list
Member, binding post unit and shell, mutual induction of voltage unit and Current Mutual Inductance unit are cast for totally enclosed pour by insulating materials
Injection body, pour mass are arranged in shell, and binding post unit is arranged on shell；
Binding post unit includes that voltage primary connection terminal, voltage secondary connection terminal, neutral conductor connecting terminal, electric current are primary
Input terminal, outlet terminal of electric current, the secondary input terminal of electric current and electric current secondary outlet terminal；
Mutual induction of voltage unit includes three voltage transformers arranged side by side, the primary winding coils head end of three voltage transformers
It is separately connected voltage primary connection terminal, the primary winding coils end of three voltage transformers is grounded after being electrically connected to each other,
The primary winding coils end electrical connection node of three voltage transformers is a neutral point N, between a neutral point N and ground
Series connection once resonance eliminator；The secondary winding coil head end of three voltage transformers is separately connected voltage secondary connection terminal, and three
The secondary winding coil end of platform voltage transformer accesses neutral conductor connecting terminal after being electrically connected to each other；
Current Mutual Inductance unit includes three current transformers arranged side by side, the primary winding coils head end of three current transformers
It is separately connected input terminal of electric current, the primary winding coils end of three current transformers is separately connected outlet of electric current
Terminal, the secondary winding coil head end of three current transformers are separately connected the secondary input terminal of electric current, three current transformers
Secondary winding coil end be separately connected electric current secondary outlet terminal.
2. full cast-type three-phase and four-line combination transformer according to claim 1, it is characterised in that: the Current Mutual Inductance
Device includes current ferric core, and the central axis of current ferric core is arranged along the longitudinal direction, and current ferric core is equipped with the electric current of front and back perforation
The primary winding coils of inner hole, current transformer pass through electric current inner hole and are wrapped in current ferric core lower part, and the two of current transformer
Secondary winding coil passes through electric current inner hole and circumferentially wound along current ferric core；The voltage transformer includes voltage iron core, voltage
The central axis of iron core is arranged along the longitudinal direction, and voltage iron core is located at below current ferric core and corresponds with current ferric core, electricity
Weight core is equipped with the voltage inner hole of front and back perforation, and the primary winding coils of voltage transformer pass through voltage inner hole and wound on electricity
The secondary winding coil on weight core top, voltage transformer passes through voltage inner hole and the first winding line wound on voltage transformer
Enclose outer layer.
3. full cast-type three-phase and four-line combination transformer according to claim 1, it is characterised in that: the electric current is primary
Input terminal is inlet wire copper bar, and outlet terminal of electric current is outlet copper bar, and inlet wire copper bar and outlet copper bar are separately positioned on electricity
Flow the front and rear sides of iron core.
4. full cast-type three-phase and four-line combination transformer according to claim 3, it is characterised in that: the inlet wire copper bar
It is arranged with insulation Anti-theft cover outside with outlet copper bar.
5. full cast-type three-phase and four-line combination transformer according to claim 4, it is characterised in that: the insulation is antitheft
Cover includes being equipped with lead seal hole with inlet wire copper bar or the matched cover of outlet copper bar, the head end of cover, and the end of cover is equipped with outlet
Hole；Inlet wire copper bar and corresponding outlet copper bar are arranged between the lead seal hole of insulation Anti-theft cover to be connected by lead sealing line.
6. full cast-type three-phase and four-line combination transformer according to claim 5, it is characterised in that: the cover end is
The taper that diameter is gradually reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820923204.6U CN208433305U (en) | 2018-06-14 | 2018-06-14 | A kind of full cast-type three-phase and four-line combination transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820923204.6U CN208433305U (en) | 2018-06-14 | 2018-06-14 | A kind of full cast-type three-phase and four-line combination transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208433305U true CN208433305U (en) | 2019-01-25 |
Family
ID=65101968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820923204.6U Expired - Fee Related CN208433305U (en) | 2018-06-14 | 2018-06-14 | A kind of full cast-type three-phase and four-line combination transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208433305U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115360A1 (en) * | 2019-12-11 | 2021-06-17 | 济南铂晶电子科技有限公司 | Three-phase integrated current transformer |
-
2018
- 2018-06-14 CN CN201820923204.6U patent/CN208433305U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021115360A1 (en) * | 2019-12-11 | 2021-06-17 | 济南铂晶电子科技有限公司 | Three-phase integrated current transformer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190125 |