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Vacuum switching lamp. RU patent 2510094.

IPC classes for russian patent Vacuum switching lamp. RU patent 2510094. (RU 2510094):

H01H33/662 -

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FIELD: electricity.

SUBSTANCE: invention relates to a vacuum switching lamp (1) with a body, which has two sections (16, 17) of the body from insulating material that are placed and made symmetrically relative to the middle plane (S). Each of both sections (16, 17) of the body from insulating material includes several parts (9, 10, 11, 12, 13, 14) of the body from insulating material. A part (9, 12) of the body from insulating material of each section of the body from insulating material placed most distantly from the middle plane (S), has length (L1), which is more than the length (L2, L3) of other parts (10, 11, 13, 14) of the body from insulating material.

EFFECT: provision of high dielectric strength of a switching lamp having compact design.

5 cl, 1 dwg

The invention relates to the vacuum switching lamp with housing, which has two placed and executed symmetrically with respect to the mid-plane part of the building of an insulating material, and each of the two areas of the body of an insulating material includes several parts of the body of an insulating material.

Such vacuum switching lamp known of DE W. Described there vacuum diagram provides a case that has two placed and executed symmetrically with respect to the mid-plane part of the building of an insulating material. Each of the two sites, housing made of insulating material includes several parts of the body from insulating material, in the case of DE V the casing of an insulating material is provided in the form of ceramic cylinders for each of the two sites, housing made of insulating material. The length of individual parts of the body of an insulating material is determined by the maximum dielectric load vacuum switching lamp respectively estimated voltage, which is calculated vacuum switching lamp, and depending on the internal geometry of vacuum switching lamps and capacitive relations with foreign elements, for example, housing grounded power switch, which is used vacuum switching lamp. The length of individual parts of the body of an insulating material at the same time is calculated so that the vacuum switching lamp has the required electric strength.

The present invention is to further improvements in vacuum switching lamp above type, which at high dielectric strength is compact.

In accordance with the invention, this is solved in a vacuum switch the lamp above type the that part of the body of an insulating material every part of the building of an insulating material, placed in the most remote from the mid-plane, has a length that is greater than the length of the other parts of the body of an insulating material.

The length of the case of an insulating material, published in the most remote from the mid-plane, every part of the building of an insulating material vacuum switching lamp is preferred, because the potential distribution is installed by vacuum switch the lamp in the axial direction, in accordance with the invention of, distributed in vacuum switching lamp, not linear part of the body of an insulating material, placed in the most remote from the mid-plane, experience a higher voltage. This is because the potential difference attributable to the part of the body of an insulating material, gradually increase from one end of the vacuum switch of the lamp to the other end of the vacuum switch of the lamp, so the last part of the body of an insulating material in greatest load. In AC systems, in addition, the polarity of the applied to the lamp potentials changed so that both parts of the hull of an insulating material, placed in the most remote from the Central plane of vacuum switching lamp alternately experience heavy loads. Therefore, the length of these housing components of an insulating material, placed in the most remote from the mid-plane is determined from the required dielectric strength or electric strength, which must comply with vacuum switch the lamp. The other part of the body of an insulating material, which have a lesser distance from the Central plane of vacuum switching lamp, have a lower dielectric load and can therefore have a smaller length, so that in this way is made of vacuum switching lamp allows compact design with simultaneous high dielectric strength of vacuum switching lamp. The average plane in the sense of the claimed invention is a plane perpendicular to the longitudinal axis of vacuum switching lamp, against which case the vacuum switching lamp made essentially symmetrical, and housing, along with the case of an insulating material that contains metal parts of the cover, in the form known for vacuum switching lamp, through which contact conclusions for fixed contact and rolling contact vacuum switch the lamp on the inside of the vacuum switch of the lamp. Part of the body of an insulating material, the preferred way is made in the form of ceramic cylinders.

In the preferred form of the invention, the additional part of the body of an insulating material with decreasing distance from the mid-plane are of decreasing length. Such decrease of length of additional parts of the body of an insulating material leads a simple way to advanced compact design of vacuum switching lamps at high dielectric strength, because the dielectric load with decreasing distance to the mid-plane of vacuum switching lights are becoming smaller, so that the requirements for the length of the parts of the body of an insulating material is also reduced.

In particularly preferred form of the invention, the length of additional parts of the body of an insulating material is calculated from the length of the most remote parts of the hull of an insulating material according to the relation:

L ( x ) & GE; p ( x ) x L N when p ( x ) ≅ ( 2 x - 1 ) 2 N - 1 )

where N is the total number of housing parts of insulating material vacuum switching lamp,

and x = N , N - 1... N 2 + 1

Such a definition length additional housing parts of insulating material by calculating the length of the most remote parts of the hull of an insulating material obtained from a variety of experiments and tests as the best definition of the length of additional parts of the body of an insulating material in depending on the length of the most remote parts of the hull of an insulating material, from which the best are the requirements for dielectric strength and compactness of vacuum switching lamp.

In another implementation of the invention between the case of an insulating material fixed screens from steam and/or controls field. Through these screens from the steam and controls field, which is fixed between the case of insulating material and are inside vacuum switching lamp, simple way guaranteed screening the case of an insulating material from spraying pairs of metal resulting from the switchover process.

In another preferred execution of the invention between the parts of the body of an insulating material provided by a metal part of the chassis. Similar to a metal part of the case is also desirable to enhance the electric strength of vacuum switching lamp.

The invention further explained in more detail on the basis of the example running with reference to the drawing, which shows a schematic cross-section corresponding to the invention of the vacuum switch of the lamp.

Presented in the example running the vacuum switching lamp in the AC system is experiencing the establishment of capacity in the axial direction, and the distribution of potential increases from one end of the lamp to the other end, so the last ceramics loaded most strongly. Depending on the polarity in the case of vacuum switching lamp 1, this part 9 or 12 of the body of an insulating material, which have consequently, the maximum length L 1 , as they are located in the most remote from the mid-plane the case of insulating material every part of the building of an insulating material. Therefore, the length L 1 defines the requirements for dielectric strength of vacuum switching lamps, and the calculated voltage and external conditions, e.g. capacitive ties with housing grounded capacity of the circuit breaker. Length L 2 and L 3 parts 10 and 13 or 11 and 14 of the body of insulating material is determined from the length L 1 parts 9 and 12 of the body of an insulating material according to the formula:

L(x) & GE; p(x)·L N

and N is the number of the ceramic elements, in the case of the example running 6, and p(x) is the scale factor, which is determined from the condition:

p(x)≅(2x-1)/(2N-1), where x can take values of N, N-1,..., N/2+1

so in the example running presented on the drawing for N=6, for reasons of symmetry, x takes values 6, 5 and 4, and the length of parts 9 and 12, and 10 and 13, or 11 and 14 of the body of an insulating material, also for reasons of symmetry regarding the middle of the plane's equal, and the scale factor is

R(6)=1=p(1) and p(5)=p(2)=9/11 and p(4)=p(3)=5/11

On the basis of the above formula is obtained, thus, for the length L 2 =0,81*L 1 and length L 2 =0,45*L 1 .

The list of reference position

1 vacuum switching lamp

2 stationary contact

3 screw terminals fixed contact

4 the sliding contact

5 screw terminals sliding contact

6 the first metal of the cover

7 second metal of the cover

8 bellows

9-14 part of the body of an insulating material/ceramic cylinders

15 metal area corps

16 the first section of the hull of an insulating material

17 the second section of the hull of an insulating material

18-25 screens from steam or controls field

L 1 length of parts 9 and 12 of the body of an insulating material

L 2 length parts 10 and 13 of the body of an insulating material

L 3 length parts 11 and 14 of the body of an insulating material

's average plane/axis of symmetry

1. Vacuum switching lamp (1) with the case that has two placed and executed symmetrically with respect to the mid-plane (S) of section (16, 17) the body of an insulating material, each of both areas (16, 17) the body of an insulating material includes several parts(9, 10, 11, 12, 13, 14) housing made of an insulating material, wherein part (9, 12) the body of an insulating material, placed in the most remote from the mid-plane (S), each section (16, 17) housing made of insulating material has a length (L 1 ), which is greater than length (L 2 , L 3 ) other parts (10, 11, 13, 14) the body of an insulating material.

2. Vacuum switching lamp (1) according to claim 1, characterized in that other part (10, 11, 13, 14) the body of an insulating material with decreasing distance from the mid-plane (S) have diminishing length (L 2 , L 3 ).

3. Vacuum switching lamp (1) according to claim 1 or 2, wherein the length other parts (10, 11, 13, 14) the body of an insulating material is calculated from the length of the most remotely placed parts (9, 12) the body of an insulating material according to the equation: L(x) & GE; p(x)·L N

when p ( x ) ≅ ( 2 x - 1 ) 2 N - 1 ) ,

where N is the total number case parts of insulating material vacuum switching lamps, and

x = N , N - 1 ... N 2 + 1.

4. Vacuum switching lamp (1) according to claim 3, wherein between parts(9, 10, 11, 12, 13, 14) housing made of insulating material fixed screens(18, 19, 20, 21, 22, 23, 24, 25) from steam and/or members(18, 19, 20, 21, 22, 23, 24, 25) management field.

5. Vacuum switching lamp (1) according to claim 3, wherein between the sites (16, 17) the body of an insulating material provided by the metal portion (15) of the housing.