CN203261020U - Combined type overvoltage protector - Google Patents
Combined type overvoltage protector Download PDFInfo
- Publication number
- CN203261020U CN203261020U CN 201320168021 CN201320168021U CN203261020U CN 203261020 U CN203261020 U CN 203261020U CN 201320168021 CN201320168021 CN 201320168021 CN 201320168021 U CN201320168021 U CN 201320168021U CN 203261020 U CN203261020 U CN 203261020U
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- protected
- overvoltage protector
- combined type
- metal oxide
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Abstract
The utility model relates to the technical field of electrical engineering, and specifically a combined type overvoltage protector. The combined type overvoltage protector comprises six groups of protection units, each group of protection unit comprises a metal oxide resistor and a fault disconnecting device, wherein the metal oxide resistor and the fault disconnecting device are connected in series; three groups of the protection units are connected in pairs to form a triangle; and the other three groups of the protection units are connected in a star-shaped mode, the three top points of the triangle are respectively connected with the three end points of the star to form a regular tetrahedron, and the four top points of the regular tetrahedron are respectively connected with three-phase power wires and a grounding wire of a protected device. The regular tetrahedron connection method is adopted by the combined type overvoltage protector, so that overvoltage protection levels and performances between any two wires of the three-phase power wires and the grounding wire of the protected device are totally the same; and the metal oxide resistors and the fault disconnecting devices, which are connected in series, are adopted as the protection units, thereby ensuring that the protection units are mutually independent and have no influence on one another.
Description
Technical field
The utility model relates to the electrical engineering technical field, definite says a kind of combination overvoltage protector.
Background technology
Because various high voltage electric equipments (such as transformer, switch, motor etc.) dielectric strength has certain limit, for fear of the harm of various overvoltage to these equipment, people are usually at its other overvoltage protection device that connects.Desirable overvoltage protection device should be able to limit various overvoltage and overvoltage protection level is consistent with performance; when breaking down, overvoltage protection device should not affect simultaneously the normal operation of protected equipment and protected equipment place system; each defencive function unit of overvoltage protection device should be separate; behind the defencive function element failure, can not affect the performance of other defencive function unit.
For for alternate superpotential protection, people are commonly used at present to be combined protector, and this combined protector is comprised of four zinc oxide valve plate unit, is connected into so-called " four stars shape " connection.Four unit are combined into six complete zinc oxide arresters in twos, finish alternate superpotential protection, and we are referred to as three-phase and four-pole formula overvoltage protection device.But this " four stars shape " principle, makes the operating condition of zinc oxide valve plate unit that variation occur fully, and brings the difficulty on the insulation coordination for having produced a neutral point to the protector people, can't satisfy above-mentioned requirements.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of combination overvoltage protector of perfect in shape and function; realized being mutually independent between protected location and be independent of each other; behind the defencive function element failure, can not affect the performance of other defencive function unit.
The technical solution of the utility model is: combination overvoltage protector, comprise six groups of protected locations, and every group of protected location forms by fault release unit of a metal oxide resistor serial connection; Wherein three groups of described protected locations connect and compose triangle in twos; Other three groups of described protected locations are by adopting star fashion to connect, and a described Atria summit is connected with three end points of described star respectively, forms positive tetrahedron, and four summits of this positive tetrahedron connect respectively three-phase power line and the ground wire of protected equipment.Because each bar rib of positive tetrahedron all is provided with one group of protected location; every group of protected location electric parameter is identical; overvoltage protection level and performance between four of positive tetrahedron summits is in full accord like this, and namely overvoltage protection level and the performance of line-to-line are in full accord arbitrarily in four lines of the three-phase power line of protected equipment and ground wire.
As the further improvement of such scheme, described fault release unit is fuse.
The effect of fault release unit is: when the metal oxide resistor of connecting with the fault release unit occurs agingly to move when being short circuit characteristic; be off state; the protected location overvoltage protection performance at its place lost efficacy; but do not affect the protective value of other protected locations; do not affect the normal operation of protected equipment and protected equipment place system yet, such six groups of protected locations guarantee overvoltage protection level and the on all four prerequisite of performance lower realized being mutually independent be independent of each other.
The utility model has the advantage of: owing to adopt the positive tetrahedron connection method; guaranteed that overvoltage protection level and the performance of line-to-line are in full accord arbitrarily in four lines of the three-phase power line of protected equipment and ground wire; adopt simultaneously metal oxide resistor series connection fault release unit as protected location, making is mutually independent between protected location is independent of each other.
Description of drawings
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Embodiment
Referring to Fig. 1; combination overvoltage protector comprises six groups of protected locations, and every group of protected location is by metal oxide resistor An(n=1～6); be connected in series fault release unit Bn(n=1～6) form, fault release unit Bn can adopt any one fuse.
Three groups of protected locations connect and compose triangle in twos according to " triangulation method "; Other three groups of protected locations are by adopting star fashion to connect; an Atria summit is connected with three end points of star respectively; form positive tetrahedron; binding post is equipped with respectively on four summits of this positive tetrahedron; four binding posts connect respectively A phase line, B phase line, C phase line and the ground wire of protected equipment; have and only have one group of protected location between any two binding posts, the electric property of every group of protected location is basically identical.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that in the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (2)
1. combination overvoltage protector comprises six groups of protected locations, it is characterized in that: every group of protected location forms by fault release unit of a metal oxide resistor serial connection; Wherein three groups of described protected locations connect and compose triangle in twos; Other three groups of described protected locations are by adopting star fashion to connect, and a described Atria summit is connected with three end points of described star respectively, forms positive tetrahedron, and four summits of this positive tetrahedron connect respectively three-phase power line and the ground wire of protected equipment.
2. described combination overvoltage protector according to claim 1, it is characterized in that: described fault release unit is fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320168021 CN203261020U (en) | 2013-04-07 | 2013-04-07 | Combined type overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320168021 CN203261020U (en) | 2013-04-07 | 2013-04-07 | Combined type overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203261020U true CN203261020U (en) | 2013-10-30 |
Family
ID=49473558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320168021 Expired - Fee Related CN203261020U (en) | 2013-04-07 | 2013-04-07 | Combined type overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203261020U (en) |
-
2013
- 2013-04-07 CN CN 201320168021 patent/CN203261020U/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 |
Granted publication date: 20131030 Termination date: 20170407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |