CN204103455U - A kind of 330kV transformer neutral point earth protection device - Google Patents
A kind of 330kV transformer neutral point earth protection device Download PDFInfo
- Publication number
- CN204103455U CN204103455U CN201420492733.7U CN201420492733U CN204103455U CN 204103455 U CN204103455 U CN 204103455U CN 201420492733 U CN201420492733 U CN 201420492733U CN 204103455 U CN204103455 U CN 204103455U
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- Prior art keywords
- current transformer
- isolating switch
- neutral point
- protection device
- transformer
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Abstract
The utility model relates to a kind of 330kV transformer neutral point earth protection device, it comprises isolating switch, zinc oxide arrester, discharging gap, current transformer, stainless steel casing, motor drive mechanism, many pillars and underframe, described isolating switch, zinc oxide arrester, discharging gap, current transformer and stainless steel casing are all arranged on underframe, motor drive mechanism is arranged on one of them pillar, discharging gap is sphere gap, current transformer is the dry-type current transformer of employing poured with epoxy resin and current transformer is arranged in stainless steel casing, motor drive mechanism is connected with isolating switch to control opening and closing of isolating switch, isolating switch is connected with one end of discharging gap with zinc oxide arrester, the other end of discharging gap is connected with current transformer.This 330kV transformer neutral point earth protection device have volume little, be convenient to Installation and Debugging, feature that reliability is high.
Description
Technical field
The utility model belongs to technical field of electricity, relates to a kind of transformer neutral point earth protection device, particularly relate to a kind of volume little, be convenient to Installation and Debugging and the high 330kV transformer neutral point earth protection device of reliability.
Background technology
Transformer neutral point earth protection device is widely used in the power transformer neutral points such as 110kV, 220kV, 330kV, 500kV; to realize the operational mode that transformer neutral point ground connection is run or earth-free operation two kinds is different; thus avoid due to the system failure; cause transformer neutral point overtension or electric current excessive, cause the infringement to transformer.
But; existing transformer neutral point earth protection device; especially the various electric equipments of 330kV transformer neutral point earth protection device are generally dispersion, thus cause that the volume of transformer neutral point earth protection device is large, Installation and Debugging are inconvenient, and reliability is low.Simultaneously, the discharging gap of existing 330kV transformer neutral point earth protection device is nod gap, the gap discharge voltage accuracy rate of this nod gap is low, dispersed greatly, characteristic is unstable, and with the characteristic of lightning arrester and the insulation coordination of transformer bad, thus make fail safe and protectiveness poor, simultaneously field adjustable difficulty is large; And the current transformer in existing 330kV transformer neutral point earth protection device is subject to amblent air temperature impact, and useful life is short, easily occurs malfunction or tripping, poor reliability.
Therefore, high in the urgent need to little, the easy Installation and Debugging of a kind of volume, the reliability at present and 330kV transformer neutral point earth protection device that long service life, protective value are good.
Summary of the invention
The utility model is intended to the defect overcoming existing 330kV transformer neutral point earth protection device, provides little, the easy Installation and Debugging of a kind of volume, reliability high and the 330kV transformer neutral point earth protection device that long service life, protective value are good.
For this reason, the utility model provides following technical scheme: a kind of 330kV transformer neutral point earth protection device, it comprises isolating switch, zinc oxide arrester, discharging gap, current transformer, stainless steel casing, motor drive mechanism, many pillars and underframe, described underframe is placed on described many pillars, described isolating switch, zinc oxide arrester, discharging gap, current transformer and stainless steel casing are all arranged on described underframe, described motor drive mechanism is arranged on pillar described in one of them, described discharging gap is sphere gap, described current transformer is the dry-type current transformer of employing poured with epoxy resin and described current transformer is arranged in described stainless steel casing, wherein, described motor drive mechanism is connected with described isolating switch to control opening and closing of described isolating switch, described isolating switch is connected with described zinc oxide arrester, described zinc oxide arrester is connected with one end of described discharging gap, the other end of described discharging gap is connected with described current transformer.
Further, wherein, two described pillars are had.
Further, wherein, described motor drive mechanism is connected with described isolating switch by kinematic link.
Compared with existing 330kV transformer neutral point earth protection device, the advantage of 330kV transformer neutral point earth protection device of the present utility model is:
1. the electric equipments such as isolating switch, zinc oxide arrester, discharging gap summation current transformer are combined into one by this 330kV transformer neutral point protective device, therefore volume little, be convenient to Installation and Debugging and reliability is high.
2. the dry-type current transformer adopting poured with epoxy resin selected by the current transformer in this 330kV transformer neutral point earth protection device; and described current transformer is contained in stainless steel casing; therefore described current transformer does not affect by amblent air temperature; long service life; protection is made to there will not be malfunction or tripping, and reliable and stable.
3. the sphere gap in this 330kV transformer neutral point earth protection device is uniform electric field electric discharge; voltage stabilization, dispersiveness is little, protective value good; and field adjustable ratio is easier to, user can according to oneself regional situation field adjustable; simultaneously with the insulation coordination of the characteristic of lightning arrester and transformer precisely, fully effectively, thermal capacity is large, improves protection safety and protected effect.
4. in this 330kV transformer neutral point earth protection device, opening of isolating switch mustn't manually participate in closed, but automatically carries out, and therefore automaticity is high, efficiency is high, reliability is high.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of 330kV transformer neutral point earth protection device of the present utility model.
Wherein, 1, isolating switch; 2, zinc oxide arrester; 3, discharging gap; 4, current transformer; 5, stainless steel casing; 6, motor drive mechanism; 7, pillar; 8, underframe; 9, kinematic link.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing, the content of embodiment is not as the restriction to protection content of the present utility model.
The utility model relates to a kind of 330kV transformer neutral point earth protection device, this 330kV transformer neutral point earth protection device have volume little, be convenient to Installation and Debugging, feature that reliability is high.
Fig. 1 shows the schematic diagram of 330kV transformer neutral point earth protection device of the present utility model.As shown in Figure 1, this 330kV transformer neutral point earth protection device comprises isolating switch 1, zinc oxide arrester 2, discharging gap 3, current transformer 4, stainless steel casing 5, motor drive mechanism 6, many pillars 7 and underframe 8.Described many pillars 7 and described underframe 8 form the supporting construction of this earth protective device jointly, to support the various electric equipments of this earth protective device.Wherein, described underframe 8 is placed on described many pillars 7, and described many pillars 7 are placed on supporting surface, such as, on ground.Described column 7 can be 3-5 root, is preferably 4.Described isolating switch 1, zinc oxide arrester 2, discharging gap 3, current transformer 4 and stainless steel casing 5 are all arranged on described underframe 8, and described isolating switch 1 is connected with described zinc oxide arrester 2, described zinc oxide arrester 2 is connected with one end of described discharging gap 3, and the other end of described discharging gap 3 is connected with described current transformer 4.Described motor drive mechanism 6 is arranged on pillar 7 described in one of them.
Wherein, adopt nod gap different from existing 330kV transformer neutral point earth protection device, in the utility model, described discharging gap 3 is sphere gap.This sphere gap is uniform electric field electric discharge, voltage stabilization, and dispersed little, protective value is good; Meanwhile, this sphere gap field adjustable ratio is easier to, and user can carry out field adjustable according to oneself regional situation; Further, the characteristic of this sphere gap and lightning arrester and the insulation coordination of transformer are precisely, fully effective, thermal capacity is large, therefore can significantly improve protection safety and the protected effect of this earth protective device.
Different from the current transformer of existing 330kV transformer neutral point earth protection device, in the utility model, described current transformer 4 is adopt the dry-type current transformer of poured with epoxy resin and described current transformer 4 is arranged in described stainless steel casing 5.Like this, described current transformer 4 is not affected, long service life by amblent air temperature; Make protection there will not be malfunction or tripping simultaneously, and reliable and stable.
In addition, adopt Artificial Control isolating switch different from existing 330kV transformer neutral point earth protection device, in the utility model, adopt motor drive mechanism 6 to control opening with closed of described isolating switch 1.Wherein, described motor drive mechanism 6 is connected with described isolating switch 1, is preferably described motor drive mechanism 6 and is connected by kinematic link 9 with described isolating switch 1, thus can control opening with closed of described isolating switch 1 by described motor drive mechanism 6.By described motor drive mechanism 6, make the automation of the control realization of described isolating switch 1, it opens with closed more stable, reliable, not by the impact of human factor.
The content of embodiment is understood for the ease of those skilled in the art and uses the utility model and describe, and does not form the restriction to the utility model protection content.Those skilled in the art, after having read content of the present utility model, can carry out suitable amendment to the utility model.Protection content of the present utility model is as the criterion with the content of claim.When not departing from flesh and blood and the protection range of claim, the various amendments carried out the utility model, change and replacement etc. are all within protection range of the present utility model.
Claims (3)
1. a 330kV transformer neutral point earth protection device, it comprises isolating switch (1), zinc oxide arrester (2), discharging gap (3), current transformer (4), stainless steel casing (5), motor drive mechanism (6), many pillars (7) and underframe (8), described underframe (8) is placed on described many pillars (7), described isolating switch (1), zinc oxide arrester (2), discharging gap (3), current transformer (4) and stainless steel casing (5) are all arranged on described underframe (8), described motor drive mechanism (6) is arranged on pillar described in one of them (7), described discharging gap (3) is sphere gap, described current transformer (4) is the dry-type current transformer of employing poured with epoxy resin and described current transformer (4) is arranged in described stainless steel casing (5), wherein, described motor drive mechanism (6) is connected with described isolating switch (1) to control opening and closing of described isolating switch (1), described isolating switch (1) is connected with described zinc oxide arrester (2), described zinc oxide arrester (2) is connected with one end of described discharging gap (3), the other end of described discharging gap (3) is connected with described current transformer (4).
2. 330kV transformer neutral point earth protection device as claimed in claim 1, wherein, has two described pillars (7).
3. 330kV transformer neutral point earth protection device as claimed in claim 2, wherein, described motor drive mechanism (6) is connected with described isolating switch (1) by kinematic link (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492733.7U CN204103455U (en) | 2014-08-29 | 2014-08-29 | A kind of 330kV transformer neutral point earth protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420492733.7U CN204103455U (en) | 2014-08-29 | 2014-08-29 | A kind of 330kV transformer neutral point earth protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204103455U true CN204103455U (en) | 2015-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420492733.7U Expired - Fee Related CN204103455U (en) | 2014-08-29 | 2014-08-29 | A kind of 330kV transformer neutral point earth protection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204103455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752536A (en) * | 2019-09-18 | 2020-02-04 | 国网浙江省电力有限公司经济技术研究院 | Gas insulated metal enclosed neutral point complete equipment |
-
2014
- 2014-08-29 CN CN201420492733.7U patent/CN204103455U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752536A (en) * | 2019-09-18 | 2020-02-04 | 国网浙江省电力有限公司经济技术研究院 | Gas insulated metal enclosed neutral point complete equipment |
| CN110752536B (en) * | 2019-09-18 | 2023-11-03 | 国网浙江省电力有限公司经济技术研究院 | Gas-insulated metal-enclosed neutral point complete equipment |
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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: 20150114 Termination date: 20210829 |