CN210489351U - Outdoor combined mutual inductor - Google Patents
Outdoor combined mutual inductor Download PDFInfo
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- CN210489351U CN210489351U CN201921783419.3U CN201921783419U CN210489351U CN 210489351 U CN210489351 U CN 210489351U CN 201921783419 U CN201921783419 U CN 201921783419U CN 210489351 U CN210489351 U CN 210489351U
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Abstract
The utility model relates to an electric power system high pressure measuring device, in particular to outdoor combined transformer. The transformer comprises a casting body main body and a current transformer body I, a voltage transformer body I, a current transformer body II and a voltage transformer body II which are sealed in the casting body main body, wherein the voltage transformer body I and the voltage transformer body II are arranged between the current transformer body I and the current transformer body II, the upper end of the casting body main body is provided with a plurality of primary binding posts which are respectively used for connecting a primary binding post of an A phase, a primary binding post of a B phase and a primary binding post of a C phase, the primary binding post of the A phase and the primary binding post of the C phase are respectively connected with the current transformer body I and the current transformer body II, the primary binding post of the B phase is connected with the voltage transformer body I and the voltage transformer body II, and the outer side of the. The utility model discloses small, resistant dirty sudden strain of a muscle, dynamic and thermal stabilization electric current are high, secondary capacity is big, ultraviolet ray resistant wind loses, maintenance cycle length, longe-lived, can extensively be arranged in the outdoor newly-increased circuit of electric power system or the transformation circuit to go.
Description
Technical Field
The utility model relates to an electric power system high pressure measuring device, in particular to outdoor combined transformer.
Background
The outdoor combined transformer is a device for measuring current, voltage or electric energy in a power system. At present, the current situation of outdoor combined transformers used in power systems is as follows: one is a combined mutual inductor adopting oil paper insulation and magnetic bottle insulation, has the defects of large volume, oil leakage, easy pollution flashover, low dynamic-thermal stable current, low secondary capacity and the like, further requires regular special maintenance and overhaul, has short service life, and is facing to the situation of being gradually eliminated at present; the other is an outdoor epoxy resin insulated combined transformer, which solves the problems of no oil, low dynamic and thermal stability current and low secondary capacity, but does not solve the problems of ultraviolet resistance, wind erosion resistance, maintenance free and long service life; the problems are always the difficult problems which disturb the maintainers of the electric power system, and are also the problems which are urgently solved in the transformation and development of the outdoor combined transformer of the electric power system.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide an outdoor combined transformer, so as to solve the disadvantages of large volume, oil leakage, pollution flashover, low dynamic-thermal stability current, low secondary capacity, no ultraviolet wind erosion resistance, tedious maintenance and repair, and short service life of the existing outdoor combined transformer for an electric power system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an outdoor combined transformer, includes the pouring body main part and seals and arrange in I of the current ware body, I of the voltage ware body, II of the current ware body and II of the voltage ware body in the pouring body main part, wherein I of the voltage ware body and II of the voltage ware body set up between I of the current ware body and II of the current ware body, the upper end of pouring body main part is equipped with a plurality of primary terminals that are used for connecting A looks primary terminal, B looks primary terminal and C looks primary terminal respectively, A looks primary terminal and C looks primary terminal are connected with I of the current ware body and II of the current ware body respectively, B looks primary terminal with I of the voltage ware body and II of the voltage ware body are connected, the outside of pouring body main part is equipped with metal casing.
The current transformer body I and the current transformer body II are identical in structure and respectively comprise a current primary coil, a current secondary coil and a current iron core, the current iron core is of an annular structure, the current secondary coil is wound on the current iron core, and the current primary coil penetrates through the current iron core;
the head end and the tail end of a current primary coil of the current transformer body I are respectively connected with two A-phase primary connecting terminals; and the head end and the tail end of a current primary coil of the current transformer body II are respectively connected with the two C-phase primary wiring terminals.
The voltage transformer body I and the voltage transformer body II are identical in structure and respectively comprise a voltage primary coil, a voltage secondary coil and a voltage iron core, the voltage iron core is of an annular structure, the voltage secondary coil is wound on the voltage iron core, and the voltage primary coil penetrates through the voltage iron core;
the head ends of the voltage primary coils of the voltage transformer body I and the voltage transformer body II are connected together and are connected with the B-phase primary connecting terminal; the tail end of a voltage primary coil of the voltage transformer body I is connected with a current primary coil of the current transformer body I; the tail end of a voltage primary coil of the voltage transformer body II is connected with a current primary coil of the current transformer body II.
The current iron core is made of an ultracrystalline alloy material, and the voltage iron core is a rolled iron core.
The primary wiring terminal is of a cylindrical structure and comprises a pouring layer and a silicon rubber layer coated on the outer side of the pouring layer, the pouring layer and the pouring body main body are of an integral pouring structure, and umbrella skirts arranged at intervals are axially arranged on the outer side of the silicon rubber layer.
And the root part of the lower end of the primary binding post is provided with a voltage-sharing shielding ring accommodated in the pouring layer.
And the joint between the lower end of the silicone rubber layer and the metal shell is in seamless butt joint through rubber sliding.
And a secondary junction box is arranged at the bottom of the front end of the pouring body main body, secondary wiring terminals of the current transformer body I, the voltage transformer body I, the current transformer body II and the voltage transformer body II are all contained in the secondary junction box, and the secondary junction box is sealed through a secondary junction box cover.
The pouring body main body is arranged on the groove-shaped base.
The metal shell is made of white steel and comprises a square shell body and an upper cover connected to the upper end of the square shell body.
The utility model has the advantages of as follows and beneficial effect:
1. small, be convenient for install: the utility model discloses an epoxy wholly pours into a mould, and a terminal forms with silicon rubber compound insulation to do seamless butt joint with ware body main part metal casing, the product is small, light in weight, can install in a flexible way and go in power line, use as electric current, voltage measurement and electric energy measurement.
2. Insulation stability, resistant pollution flashover: the utility model discloses a reasonable structural design guarantees that the product has very big surface insulation, and silicon rubber insulating material has good resistant tracking and resistant electric erosion performance in addition, has improved the pollution flashover voltage widely, can prevent the emergence of pollution flashover trouble effectively.
3. The maintenance period is long: the utility model discloses a terminal and silicon rubber composite insulation form, and silicon rubber material has good hydrophobicity and hydrophobic migration life-span, has good ultraviolet resistance performance, has decided the product deterioration phenomenon that can not appear declining, so the product does not need the periodic maintenance.
4. The secondary capacity is large: the utility model discloses the secondary is capacious, can effectively guarantee secondary metering device's accurate measurement or protection device's reliable action.
5. Good sealing performance and electricity larceny prevention: the secondary wiring box of the utility model is positioned in the whole fully sealed secondary wiring box, thereby ensuring that the product can not be short-circuited and rusted due to the wetting of rainwater; in addition, the secondary cover plate has a lead sealing function, so that the phenomenon of electricity stealing caused by switching the secondary wires is avoided.
6. The utility model discloses a metal casing that pouring body main part outside parcel was made with white steel has rain-proof snow, ultraviolet protection, shields the electromagnetic external radiation.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a front view of the present invention;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a top view of fig. 2.
In the figure: the transformer comprises a current transformer body I1, a voltage transformer body I2, an A-phase primary wiring terminal 3, a B-phase primary wiring terminal 4, a secondary wiring box 5, a groove-shaped base 6, an umbrella skirt 7, a primary wiring terminal 8, a metal shell 9, a current primary coil 10, a current secondary coil 11, a voltage primary coil 12, a voltage secondary coil 13, a voltage iron core 14, a secondary wiring terminal 15, a voltage-sharing shielding ring 16, a casting body main body 17, a secondary wiring box cover 18, a current transformer body II 19, a voltage transformer body II 20 and a C-phase primary wiring terminal 21.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-4, the utility model provides a pair of outdoor combination mutual-inductor, including pouring body main part 17 and seal the electric current ware body I1, the voltage ware body I2, electric current ware body II 19 and the voltage ware body II 20 of arranging in pouring body main part 17, wherein voltage ware body I2 and voltage ware body II 20 set up between electric current ware body I1 and current ware body II 19, the upper end of pouring body main part 17 is equipped with a plurality of primary terminals 8 that are used for connecting binding post 3, binding post 4 and the binding post 21 of C looks primary terminal of A looks respectively, binding post 3 is once connected with electric current ware body I1 and current ware body II 19 respectively to A looks and binding post 21 of C looks, binding post 4 is once connected with voltage ware body I2 and voltage ware body II 20 to B looks, the outside of pouring body main part 17 is equipped with metal casing 9.
Further, the metal case 9 includes a square case body and an upper cover connected to an upper end of the square case body, and the material of the metal case 9 is preferably white steel.
As shown in fig. 1, the current transformer body i 1 and the current transformer body ii 19 have the same structure, and both include a current primary coil 10, a current secondary coil 11, and a current iron core, the current iron core has an annular structure, the current secondary coil 11 is wound on the current iron core, and the current primary coil 10 penetrates through the current iron core; the head end and the tail end of a current primary coil 10 of the current transformer body I1 are respectively connected with two A-phase primary connecting terminals 3; the head end and the tail end of the current primary coil 10 of the current transformer body II 19 are respectively connected with two C-phase primary connecting terminals 21. The casting body 17 is mounted on a trough-shaped base 6.
The voltage transformer body I2 and the voltage transformer body II 20 are identical in structure and respectively comprise a voltage primary coil 12, a voltage secondary coil 13 and a voltage iron core 14, the voltage iron core 14 is of an annular structure, the voltage secondary coil 13 is wound on the voltage iron core 14, and the voltage primary coil 12 penetrates through the voltage iron core 14; the head ends of the voltage primary coils 12 of the voltage transformer body I2 and the voltage transformer body II 20 are connected together and are connected with the B-phase primary connecting terminal 4; the tail end of a voltage primary coil 12 of the voltage transformer body I2 is connected with a current primary coil 10 of the current transformer body I1; the end of the primary voltage coil 12 of the voltage body ii 20 is connected to the primary current coil 10 of the current body ii 19.
The primary binding post 8 is of a cylindrical structure and comprises a pouring layer and a silicon rubber layer coated on the outer side of the pouring layer, the pouring layer and the pouring body main body 17 are of an integral pouring structure, and umbrella skirts 7 arranged at intervals are axially arranged on the outer side of the silicon rubber layer. The joint between the lower end of the silicone rubber layer and the metal shell 9 is in seamless butt joint through glue slipping.
Further, the root of the lower end of the primary binding post 8 is provided with a grading and shielding ring 16 accommodated in the casting layer, and the grading and shielding ring 16 ensures uniform transition of an electric field.
As shown in fig. 2-4, a secondary junction box 5 is provided at the bottom of the front end of the casting body main body 17, the secondary junction box 5 is formed by welding the metal casing 9 in a seamless manner, the secondary connection terminals of the current transformer body i 1, the voltage transformer body i 2, the current transformer body ii 19 and the voltage transformer body ii 20 are all accommodated in the secondary junction box 5, and the secondary junction box 5 is sealed by a secondary junction box cover 18. A sealing silicone rubber pad is arranged between the secondary junction box 5 and the secondary junction box cover 18, so that the sealing of the secondary junction box can be effectively ensured, and short circuit and corrosion caused by wetting of rainwater can be avoided. The secondary junction box 5 is formed by seamless welding of metal plates, the shell is grounded, and the operation is safe and reliable;
the utility model discloses a manufacture process is:
finishing the winding of the current secondary coil 10 and the current primary coil 11 to form an A, C-phase primary connecting terminal, and binding the terminals through insulation and buffering to form a current transformer body I1 and a current transformer body II 19; the voltage secondary coil 13 and the voltage primary coil 12 are sleeved on the voltage iron core 14 column after being wound to form a B-phase primary connecting terminal 4, and the B-phase primary connecting terminal form a voltage transformer body I2 and a voltage transformer body II 20 after being insulated, buffered and bound; fixing a current transformer body I1, a current transformer body II 19, a voltage transformer body I2 and a voltage transformer body II 20 in a casting mould through a primary wiring terminal and a fixing piece of a secondary coil, sequentially connecting the current transformer body I1, the current transformer body II 19 and a secondary wiring terminal 15 of the voltage transformer body I2 and the voltage transformer body II 20, adjusting the distance, then carrying out vacuum casting and curing by using epoxy resin to form a casting body main body 17 with five primary wiring terminals 8, hanging a rubber composite insulating layer with an umbrella skirt 7 on the primary wiring terminals 8, and arranging a metal shell 9 made of white steel on the outer side of the casting body main body 17. Then, an integrated structure consisting of the A-phase primary connecting terminal 3, the B-phase primary connecting terminal 4, the C-phase primary connecting terminal 21, the pouring body main body 17 and the metal shell 9 is formed, and finally, the integrated structure is integrally installed on the groove-shaped base 6.
Two current ware bodies are located the both sides of two voltage ware bodies, not only increase product surface creepage distance, guarantee moreover that the inside electric field of product is more even. The metal shell 9 made of white steel is wrapped outside the casting body main body 17, and the casting body has the functions of rain and snow prevention, ultraviolet ray prevention and electromagnetic outward radiation shielding. And a grading and shielding ring 16 is embedded in the resin column at the joint of the primary binding post 8 and the white steel shell 9, so that the uniform transition of an electric field is ensured. The primary binding post 8 is a vertical cylinder, and is provided with umbrella skirts 7 at intervals, so that the inter-phase distance of the product and the creepage distance on the surface of the product are increased, the insulation level is increased, and pollution flashover voltage is prevented.
The utility model discloses a three-phase two-element V-arrangement combined mutual inductor with a white steel shell, which is a new product designed completely according to the national standard, the iron core of the current device part adopts ultra-microcrystalline alloy material, the remanence of the ultra-microcrystalline mutual inductor can be ignored, the error influence on the mutual inductor is very small, thus the direct check can be carried out without demagnetization, the check time is saved, and the working efficiency is improved; the error curve is smooth, the error from 1% to 120% is almost a straight line, and the problems of poor error characteristic, unsmooth error curve and overlarge negative error interval of the conventional current transformer are solved. The iron core of the voltage device part adopts a rolled iron core, and the change conditions of the primary current and the primary voltage can be accurately reflected and measured by utilizing the electromagnetic conversion principle, and then the secondary current and the secondary voltage are transmitted to a secondary metering and controlling device; the product is directly installed in a power line and used for current and voltage measurement and electric energy measurement.
The utility model discloses a terminal covers silicon rubber composite insulation outward, ware body main part wraps the seamless butt joint of white steel casing outward and becomes integral type totally enclosed construction, and small, resistant dirty sudden strain of a muscle, dynamic and thermal stability electric current are high, secondary capacity is big, ultraviolet resistant weathering, maintenance cycle length, longe-lived, can extensively be arranged in the outdoor newly-increased circuit of electric power system or reform transform the circuit and go.
The above description is only for the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (10)
1. An outdoor combined transformer is characterized by comprising a casting body main body (17), a current transformer body I (1), a voltage transformer body I (2), a current transformer body II (19) and a voltage transformer body II (20) which are sealed in the casting body main body (17), wherein the voltage transformer body I (2) and the voltage transformer body II (20) are arranged between the current transformer body I (1) and the current transformer body II (19), the upper end of the casting body main body (17) is provided with a plurality of primary wiring terminals (8) which are respectively used for connecting an A-phase primary wiring terminal (3), a B-phase primary wiring terminal (4) and a C-phase primary wiring terminal (21), the A-phase primary wiring terminal (3) and the C-phase primary wiring terminal (21) are respectively connected with the current transformer body I (1) and the current transformer body II (19), the B-phase primary wiring terminal (4) is connected with the voltage transformer body I (2) and the voltage transformer body II (20), and a metal shell (9) is arranged on the outer side of the casting body main body (17).
2. The outdoor combined transformer according to claim 1, characterized in that the current transformer body I (1) and the current transformer body II (19) are identical in structure and each comprise a current primary coil (10), a current secondary coil (11) and a current iron core, the current iron core is of an annular structure, the current secondary coil (11) is wound on the current iron core, and the current primary coil (10) penetrates through the current iron core;
the head end and the tail end of a current primary coil (10) of the current transformer body I (1) are respectively connected with two A-phase primary connecting terminals (3); the head end and the tail end of a current primary coil (10) of the current transformer body II (19) are respectively connected with two C-phase primary connecting terminals (21).
3. An outdoor combined transformer according to claim 2, characterized in that the transformer body I (2) and the transformer body II (20) are identical in structure and each comprise a voltage primary coil (12), a voltage secondary coil (13) and a voltage iron core (14), the voltage iron core (14) is of an annular structure, the voltage secondary coil (13) is wound on the voltage iron core (14), and the voltage primary coil (12) penetrates through the voltage iron core (14);
the head ends of the voltage primary coils (12) of the voltage transformer body I (2) and the voltage transformer body II (20) are connected together and are connected with the B-phase primary connecting terminal (4); the tail end of a voltage primary coil (12) of the voltage transformer body I (2) is connected with a current primary coil (10) of the current transformer body I (1); the tail end of a voltage primary coil (12) of the voltage transformer body II (20) is connected with a current primary coil (10) of the current transformer body II (19).
4. An outdoor combined transformer according to claim 3, characterized in that the current core is made of ultra-microcrystalline alloy material, and the voltage core (14) is made of rolled iron core.
5. An outdoor combined transformer according to claim 1, characterized in that the primary binding post (8) is of a cylindrical structure and comprises a casting layer and a silicone rubber layer coated on the outer side of the casting layer, the casting layer and the casting body main body (17) are of an integral casting structure, and umbrella skirts (7) arranged at intervals are axially arranged on the outer side of the silicone rubber layer.
6. An outdoor combined transformer according to claim 5, characterized in that the root of the lower end of the primary binding post (8) is provided with a voltage-sharing shielding ring (16) accommodated in the casting layer.
7. An outdoor combined transformer according to claim 5, characterized in that the joint between the lower end of the silicone rubber layer and the metal shell (9) is seamlessly butted by a glue slip.
8. An outdoor combined transformer according to claim 1, characterized in that the bottom of the front end of the casting body main body (17) is provided with a secondary junction box (5), the secondary connection terminals of the current transformer body I (1), the voltage transformer body I (2), the current transformer body II (19) and the voltage transformer body II (20) are all accommodated in the secondary junction box (5), and the secondary junction box (5) is sealed by a secondary junction box cover (18).
9. An outdoor combined transformer according to claim 1, characterised in that the casting body (17) is mounted on a trough-shaped base (6).
10. An outdoor combined transformer according to claim 1, characterized in that the metal shell (9) is made of white steel, and the metal shell (9) comprises a square shell main body and an upper cover connected to the upper end of the square shell main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921783419.3U CN210489351U (en) | 2019-10-23 | 2019-10-23 | Outdoor combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921783419.3U CN210489351U (en) | 2019-10-23 | 2019-10-23 | Outdoor combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210489351U true CN210489351U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921783419.3U Active CN210489351U (en) | 2019-10-23 | 2019-10-23 | Outdoor combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210489351U (en) |
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2019
- 2019-10-23 CN CN201921783419.3U patent/CN210489351U/en active Active
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Denomination of utility model: An outdoor combination transformer Effective date of registration: 20230426 Granted publication date: 20200508 Pledgee: China Construction Bank Corporation Dalian Pulandian Branch Pledgor: DALIAN NORTH INSTRUMENT TRANSFORMER GROUP Co.,Ltd. Registration number: Y2023980039443 |