CN204809829U - Voltage transformer harmonic elimination device - Google Patents
Voltage transformer harmonic elimination device Download PDFInfo
- Publication number
- CN204809829U CN204809829U CN201520447976.3U CN201520447976U CN204809829U CN 204809829 U CN204809829 U CN 204809829U CN 201520447976 U CN201520447976 U CN 201520447976U CN 204809829 U CN204809829 U CN 204809829U
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- CN
- China
- Prior art keywords
- harmonic elimination
- voltage transformer
- cylindrical drum
- arc extinguishing
- compartment
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Abstract
The utility model relates to a voltage transformer harmonic elimination device, including a cylinder section of thick bamboo (1), a cylinder section of thick bamboo (1) is made by unsaturated glass fiber resin and its bottom is sealed by aluminium spiral cover (2), the top watering of aluminium spiral cover (2) has lower resin layer (3), it fills up arc extinguishing sand (5) around to be provided with waterproof box (4) and waterproof box (4) in a cylinder section of thick bamboo (1), the top watering of arc extinguishing sand (5) has last resin layer (8), upward be provided with epoxy lid (9) on resin layer (8), be provided with in the waterproof box (4) discharge resistance (6) and combined floodgate contactor (7), the wiring of discharge resistance (6) and combined floodgate contactor (7) is drawn and is finally drawn from last epoxy lid (9) from waterproof box (4) and forms the terminal that supplies the wiring to use. The reliability and the production qualification rate of this harmonic elimination device are high, and the easily production preparation, and simultaneously, its quality function is stable more, reliable.
Description
Technical field
The utility model belongs to technical field of electrical equipment, relates to the parts of high voltage power transmisson system power distribution cabinet, is specifically related to a kind of voltage transformer harmonic elimination apparatus.
Background technology
In the electric power system of isolated neutral, there is a kind of situation more dangerous, namely, when a phase ground connection, if earth current is comparatively large, interrupted arc will be there is, this can make circuit generation voltage resonance phenomenon, form the series resonant circuit of a R-L-C on the line, thus make circuit to occur dangerous overvoltage (2.5-3 of phase voltage can be reached doubly), the insulation breakdown in the weak place that causes circuit insulate.For when preventing a phase ground connection, interrupted arc appears in earth point, cause overvoltage, regulations stipulate, be greater than (in 3-10kV electrical network, earthing capacitance current is greater than 30A) in the electric power system of certain value at unbalanced earth fault capacitance current, mains neutral point must adopt the operational mode through grounding through arc.Compensated distribution network, temporarily allows operation 2 hours when there is a phase earth fault, when a phase ground connection, other two phase-to-ground voltage will be elevated to line voltage, namely raises the multiple for former voltage to earth.
Simultaneously, there is many energy-storage travelling wave tubes in electric power system, when system carries out operating or breaking down, transformer, instrument transformer etc. may cause ferro resonance containing capacitances in series in nonlinear inductance element and the system of iron-core element, form endanger safe operation of power system.In the non-direct ground system of isolated neutral, the ferro-resonance over-voltage that iron electromagnetic type voltage transformer causes is common, is the more a kind of internal overvoltage that causes the accident.This overvoltage gently then makes voltage transformer fuse failure, heavy then burn voltage transformer, even demolishs porcelain insulator and lightning arrester causes system shutdown.Series resonance phenomenon can be produced under certain power supply effect, cause in system, occurring serious resonance overvoltage.
But existing many harmonic elimination apparatus, to the process of resonance not in time, what also have even can accurately not judge the fault that current system occurs, and is failure to actuate.
In view of the above-mentioned technological deficiency of prior art, in the urgent need to developing a kind of novel voltage transformer harmonic elimination apparatus.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming existed in prior art, provides a kind of voltage transformer harmonic elimination apparatus, and reliability and the production qualification rate of this harmonic elimination apparatus are high, and are easy to manufacture, and meanwhile, its quality function is more stable, reliable.
To achieve these goals, the utility model provides following technical scheme: a kind of voltage transformer harmonic elimination apparatus, it comprises cylindrical drum, it is characterized in that, described cylindrical drum is made up of unsaturated glass fiber resin and is sealed by aluminium spiral cover bottom it, the top pouring of described aluminium spiral cover has lower resin bed, compartment is provided with and arc extinguishing sand fills up in the surrounding of described compartment in described cylindrical drum, the top pouring of described arc extinguishing sand has upper resin bed, described upper resin bed is provided with epoxy lid, discharge resistance and closing contactor is provided with in described compartment, the wiring of described discharge resistance and closing contactor is from described compartment extraction and final covering from described upper epoxy draws the binding post of formation for wiring.
Further, wherein, the top of described cylindrical drum is by described upper epoxy cap seal mouth.
Compared with existing harmonic elimination apparatus, voltage transformer harmonic elimination apparatus of the present utility model has following Advantageous Effects:
(1) it promptly and accurately can judge the ferro-resonance over-voltage of system and eliminate fault.
(2) cylindrical drum is made up of unsaturated glass fiber resin, makes it not only have very high mechanical strength, and quality is light, fire-proof and explosion-proof, insulate.
(3) arc extinguishing sand in the middle of and the resin of pouring can arc-removings timely and effectively, waterproof insulation, the operation that assurance device can be reliable, safe, stable.
(4) arc extinguishing sand in the middle of makes components and parts directly not contact the resin of pouring, make production efficiency and qualification rate high, and quality is more stable, reliable.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of voltage transformer harmonic elimination apparatus of the present utility model.
Embodiment
Further illustrate the utility model below in conjunction with drawings and Examples, the content of embodiment is not as the restriction to protection range of the present utility model.
The utility model relates to a kind of voltage transformer harmonic elimination apparatus, and it can be serially connected in voltage transformer neutral point, can eliminate the resonance that PT causes, and can limit again the overcurrent flowing through winding.
Fig. 1 shows the schematic diagram of voltage transformer harmonic elimination apparatus of the present utility model.As shown in Figure 1, described voltage transformer harmonic elimination apparatus comprises cylindrical drum 1.In the utility model, described cylindrical drum 1 is made up of unsaturated glass fiber resin.Unsaturated glass fiber resin has waterproof anti-explosion, class of insulation advantages of higher, makes the raising corresponding to the class of insulation of the waterproof anti-explosion of this harmonic elimination apparatus.Meanwhile, described cylindrical drum 1 makes this harmonic elimination apparatus structure simple, easy for installation, saves safe distance of on-the-spot installing space and high pressure etc.Be applicable to the with power system with neutral point nondirectly grounding of confession, electricity consumption enterprise, and defencive function is complete, to the workload alleviating operation maintenance personnel, ensures that the stable operation of network system is significant.
The bottom of described cylindrical drum 1 is sealed by aluminium spiral cover 2.The top pouring of described aluminium spiral cover 2 has lower resin bed 3.Compartment 4 is provided with and arc extinguishing sand 5 fills up in the surrounding of described compartment 4 in described cylindrical drum 1.The top pouring of described arc extinguishing sand 5 has upper resin bed 8.Owing to being provided with compartment 4 and arc extinguishing sand 5 fills up in the surrounding of described compartment 4, components and parts are made directly not contact pouring resin, thus components and parts welt, inefficacy can not be caused, and components and parts is fixing simple, not only increase the reliability of product and the qualification rate of production, and be easy to manufacture, quality function is more stable, reliable.
Described upper resin bed 8 is provided with epoxy lid 9.Preferably, described upper epoxy lid 9 is positioned at the top open part of described cylindrical drum 1, and the top of described cylindrical drum 1 is sealed by described upper epoxy lid 9.Discharge resistance 6 and closing contactor 7 is provided with in described compartment 4.Described discharge resistance 6 is identical with existing harmonic elimination apparatus with the structure of closing contactor 7, therefore, is not described in detail herein.The wiring of described discharge resistance 6 and closing contactor 7 is drawn from described compartment 4 and is finally drawn from described upper epoxy lid 9 binding post formed for wiring.
When manufacturing voltage transformer harmonic elimination apparatus of the present utility model, first, unsaturated glass fiber resin being processed thus makes cylindrical drum 1.Then, seal with the bottom opening of aluminium spiral cover 2 to described cylindrical drum 1.Then, described Lu's spiral cover 2 waters one deck resin bed 3.Afterwards, some arc extinguishing sands 5 of perfusion in described cylindrical drum 1, then, the compartment 4 inside being equipped with discharge resistance 6 and closing contactor 7 is put into described cylindrical drum 1 and surrounding's arc extinguishing sand of described compartment 4 is filled, and by wiring from cylindrical drum described in Base top contact 1.Finally, on described arc extinguishing sand 5 waters again, resin bed 8 is to guarantee sealing, and the top epoxy lid 9 of described upper resin bed 8 is sealed.
Above-described embodiment of the present utility model is only for the utility model example is clearly described, and is not the restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here cannot give exhaustive to all execution modes.Every belong to the technical solution of the utility model the apparent change of extending out or variation be still in the row of protection range of the present utility model.
Claims (2)
1. a voltage transformer harmonic elimination apparatus, it comprises cylindrical drum (1), it is characterized in that, described cylindrical drum (1) is made up of unsaturated glass fiber resin and is sealed by aluminium spiral cover (2) bottom it, the top pouring of described aluminium spiral cover (2) has lower resin bed (3), compartment (4) is provided with and arc extinguishing sand (5) fills up in the surrounding of described compartment (4) in described cylindrical drum (1), the top pouring of described arc extinguishing sand (5) has upper resin bed (8), described upper resin bed (8) is provided with epoxy lid (9), discharge resistance (6) and closing contactor (7) is provided with in described compartment (4), the wiring of described discharge resistance (6) and closing contactor (7) is drawn from described compartment (4) and is finally drawn the binding post of formation for wiring from described upper epoxy lid (9).
2. voltage transformer harmonic elimination apparatus according to claim 1, is characterized in that, the top of described cylindrical drum (1) is sealed by described upper epoxy lid (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520447976.3U CN204809829U (en) | 2015-06-29 | 2015-06-29 | Voltage transformer harmonic elimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520447976.3U CN204809829U (en) | 2015-06-29 | 2015-06-29 | Voltage transformer harmonic elimination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204809829U true CN204809829U (en) | 2015-11-25 |
Family
ID=54594593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520447976.3U Expired - Fee Related CN204809829U (en) | 2015-06-29 | 2015-06-29 | Voltage transformer harmonic elimination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204809829U (en) |
-
2015
- 2015-06-29 CN CN201520447976.3U patent/CN204809829U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 Termination date: 20170629 |