CN203911257U - Switchgear circuit structure with fuse protection function - Google Patents
Switchgear circuit structure with fuse protection function Download PDFInfo
- Publication number
- CN203911257U CN203911257U CN201420313504.4U CN201420313504U CN203911257U CN 203911257 U CN203911257 U CN 203911257U CN 201420313504 U CN201420313504 U CN 201420313504U CN 203911257 U CN203911257 U CN 203911257U
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- Prior art keywords
- fuse
- circuit structure
- switch
- ground connection
- voltage switch
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Abstract
The utility model discloses a switchgear circuit structure with a fuse protection function. Compared with the prior art, the structure overcomes the defect that the fuse in the switchgear is quite likely to be damaged. The switchgear circuit structure comprises a high voltage switch (2) that is connected to a high voltage bus (1). The cut-off point of the high voltage switch (2) is connected to the ground. The closed point of the high voltage switch (2) is separately connected to a fuse A (3), a fuse B (4), an overvoltage protector (8) and an electric indication lamp (6). The fuse A (3) is connected to a voltage transformer (5) and then grounded. The fuse B (5) is connected to a zero sequence current transformer (7) and then grounded. The overvoltage protector (8) is directly grounded. The electric indication lamp (6) is directly grounded. The switchgear circuit structure with the fuse protection function achieves a goal of allowing the fuse to protect the switch under the condition of a large current, and achieves the effect of allowing the switch to protect the fuse in turn under other conditions.
Description
Technical field
The utility model relates to switch cubicle circuit structure technical field, is a kind of switch cubicle circuit structure with fuse defencive function specifically.
Background technology
Fuse is the most frequently used protective device equipment of present stage, is used for protecting electric equipment to avoid the infringement of overload and short circuit current.Press mounting condition and purposes, can select dissimilar high-tension fuse, as drop type outside room, formula etc. within doors, for the high-tension fuse of some special equipments, select the series special being equipped with mutually.Switch cubicle is current common electric equipment, and its effect is in electric power system, to generate electricity, in the process of transmission of electricity, distribution and electric energy conversion, carry out folding, control and protection power consumption equipment.As shown in Figure 2, at present in all switch cubicles, the collocation mode of fuse and switch is all fuse at front, high-voltage switch gear rear, and the effect that its fuse plays is current limliting, thus protection switch.And switch is through improvement and technological innovation for a long time, although still need the protection of fuse, but its reliability, fail safe and intelligent having obtained are improved greatly.Current a lot of electrical networks unstable and polluting, although can not damage switch, very large to the probability of damage of fuse, cause occurring in a lot of situations that switch is normal and fuse damage causes switch cubicle global failure.And in high-voltage switch gear cutoff high source, can produce arcing, the energy that arcing produces is born jointly by switch and fuse, because fuse is more fragile comparatively speaking, further causes so again the reduction of the life and reliability of fuse.
Although there is part technology to propose kinds of protect mode for fuse, these protection schemes are all from the supplementary protection of external equipment.For the particularity of power industry standard, these equipment 1, without assessment and the authentication of crossing employer's organization, do not have operability in actual use; 2, use a large amount of supplementary technologies, cost price is higher, cannot apply in the modal switch cubicle of real life comprehensively.How developing a kind of low-cost circuit structure that can play defencive function for the fuse in switch cubicle has become and has been badly in need of the technical problem that solves.
Utility model content
The purpose of this utility model is in order to solve the extremely flimsy defect of the fuse in switch cubicle in prior art, provides a kind of switch cubicle circuit structure with fuse defencive function to solve the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of switch cubicle circuit structure with fuse defencive function; comprise high voltage bus; also comprise high-voltage switch gear; described high-voltage switch gear is connected on high voltage bus; the cut-off point ground connection of described high-voltage switch gear; the closing point of described high-voltage switch gear picks out respectively fuse A, fuse B, overvoltage protection device and charged indicator light; ground connection after described fuse A is connected with voltage transformer; ground connection after described fuse B is connected with zero sequence current mutual inductor; the direct ground connection of described overvoltage protection device, the described direct ground connection of charged indicator light.
Described overvoltage protection device adopts znr.
beneficial effect
A kind of switch cubicle circuit structure with fuse defencive function of the present utility model; the rear end of fuse in switch compared with prior art; electric current must pass through switch before overcurrent fuse; can not only reach the object of fuse protection switch in the situation that of large electric current; also reach switch in other cases and can protect conversely the effect of fuse, improved the reliability of fuse.And the protection of fuse and the raising of reliability, all, from original inside switch cabinet part, the increase that does not bring other equipment, greatly reduces production cost.Particularly, for power industry, owing to only having changed circuit structure, do not increase the design of new power equipment, not only reduced cost, and greatly improved operability.There is simple in structure, with low cost, workable feature.
accompanying drawing explanation
Fig. 1 is circuit connection structure schematic diagram of the present utility model
Fig. 2 is the electrical block diagram of switch cubicle in prior art
Wherein, 1-high voltage bus, 2-high-voltage switch gear, 3-fuse A, 4-fuse B, 5-voltage transformer, the charged indicator light of 6-, 7-zero sequence current mutual inductor, 8-overvoltage protection device.
Embodiment
For making that architectural feature of the present utility model and the effect reached are had a better understanding and awareness, in order to preferred embodiment and accompanying drawing, coordinate detailed explanation, be described as follows:
As shown in Figure 1, a kind of switch cubicle circuit structure with fuse defencive function described in the utility model, comprises high voltage bus 1 and high-voltage switch gear 2.High-voltage switch gear 2 is connected on high voltage bus 1, and the electric current on high voltage bus 1, before process fuse A3 and fuse B4, must pass through high-voltage switch gear 2 like this.The cut-off point ground connection of high-voltage switch gear 2, high-voltage switch gear 2 is direct ground connection when disconnecting, and has guaranteed circuit safety.The closing point of high-voltage switch gear 2 picks out respectively fuse A3, fuse B4, overvoltage protection device 8 and charged indicator light 6, and overvoltage protection device 8 plays overvoltage protection effect, can adopt znr; Charged indicator light 6 plays charged indicative function; Fuse A3 and fuse B4 are for circuit protection.Ground connection after fuse A3 is connected with voltage transformer 5, ground connection after fuse B4 is connected with zero sequence current mutual inductor 7, fuse A3 and fuse B4 protect respectively the use safety of voltage transformer 5 and zero sequence current mutual inductor 7.The direct ground connection of overvoltage protection device 8, the direct ground connection of charged indicator light 6, overvoltage protection device 8, charged indicator light 6, voltage transformer 5 and zero sequence current mutual inductor 7 form and are connected in parallel on the whole.
When reality is used, when high-voltage switch gear 2 disconnects, integral ground, has guaranteed circuit safety.When high-voltage switch gear 2 is closed, fuse A3, fuse B4 be the rear end in high-voltage switch gear 2 respectively.When running under large current conditions, fuse A3 and fuse B4 protection high-voltage switch gear 2.In the process in switch folding; fuse A3, fuse B4 are easily damaged by arc current; but now fuse A3 and fuse B4 are in high-voltage switch gear 2 rear ends; after switch cuts off, on fuse, impact is reduced to minimum in the injury of arcing; thereby guaranteeing under the prerequisite of fuse A3 and fuse B4 protection high-voltage switch gear 2; the reliability that has improved fuse A3 and fuse B4, has formed giving mutual protection of fuse and switch.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what in above-described embodiment and specification, describe is principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall in claimed scope of the present utility model.The protection range that the utility model requires is defined by appending claims and equivalent thereof.
Claims (2)
1. a switch cubicle circuit structure with fuse defencive function, comprise high voltage bus (1), it is characterized in that: also comprise high-voltage switch gear (2), described high-voltage switch gear (2) is connected on high voltage bus (1), the cut-off point ground connection of described high-voltage switch gear (2), the closing point of described high-voltage switch gear (2) picks out respectively fuse A(3), fuse B(4), overvoltage protection device (8) and charged indicator light (6), described fuse A(3) be connected with voltage transformer (5) after ground connection, described fuse B(4) be connected with zero sequence current mutual inductor (7) after ground connection, described overvoltage protection device (8) is ground connection directly, described charged indicator light (6) is ground connection directly.
2. a kind of switch cubicle circuit structure with fuse defencive function according to claim 1, is characterized in that: described overvoltage protection device (8) adopts znr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313504.4U CN203911257U (en) | 2014-06-13 | 2014-06-13 | Switchgear circuit structure with fuse protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420313504.4U CN203911257U (en) | 2014-06-13 | 2014-06-13 | Switchgear circuit structure with fuse protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203911257U true CN203911257U (en) | 2014-10-29 |
Family
ID=51785503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420313504.4U Expired - Fee Related CN203911257U (en) | 2014-06-13 | 2014-06-13 | Switchgear circuit structure with fuse protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203911257U (en) |
-
2014
- 2014-06-13 CN CN201420313504.4U patent/CN203911257U/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 | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Switchgear circuit structure with fuse protection function Effective date of registration: 20160629 Granted publication date: 20141029 Pledgee: Hefei high tech Company limited by guarantee Pledgor: Anhui Huidian Technology Co., Ltd. Registration number: 2016340000032 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20170619 Granted publication date: 20141029 Pledgee: Hefei high tech Company limited by guarantee Pledgor: Anhui Huidian Technology Co., Ltd. Registration number: 2016340000032 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20210613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |