US3213251A - Circuit breaker having arc extinguishing medium of granulated insulating material which includes a lubricant to decrease friction between elements thereof - Google Patents
Circuit breaker having arc extinguishing medium of granulated insulating material which includes a lubricant to decrease friction between elements thereof Download PDFInfo
- Publication number
- US3213251A US3213251A US171098A US17109862A US3213251A US 3213251 A US3213251 A US 3213251A US 171098 A US171098 A US 171098A US 17109862 A US17109862 A US 17109862A US 3213251 A US3213251 A US 3213251A
- Authority
- US
- United States
- Prior art keywords
- insulating material
- circuit breaker
- granulated
- lubricant
- elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011810 insulating material Substances 0.000 title description 12
- 239000000314 lubricant Substances 0.000 title description 3
- 239000000945 filler Substances 0.000 description 9
- 239000007787 solid Substances 0.000 description 8
- 239000008188 pellet Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000011805 ball Substances 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000012211 strain insulator Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/62—Lubricating means structurally associated with the switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/32—Insulating body insertable between contacts
Definitions
- Numeral 1 designates the movable contact made of a longitudinally corrugated tube provided with point 2.
- the longitudinal grooves of the corrugation 20 are shown on the surface of tube 1.
- Movable contact 1 fits into the steady contact 3, made of a tube with holes 4 all along it.
- End of tube 3 has the form of a funnel 5.
- Finger contact 1 fits also into another contact 6, made of a tube with two funnel-shaped ends 7 and 8. All contacts are mounted within an insulating cylinder 9, which is partly filled With granulated or powderized insulating material 10.
- strain insulator 11 On the end of finger contact 1 is placed strain insulator 11, through which a mechanism (not shown) moves said finger contact 1 in and out of contact 3.
- the source of voltage 12 is connected by means of conductor 13 with steady contact 6, and by means of conductor 14 with useful resistance 15, which represents the energy consuming device, and is linked through conductor 16 with steady contact 3.
- Locknuts 1'7 and 18 and stud 19 serve for connection of conductor 16 to steady contact 3.
- silicon liquid can be used for lubrication, in order to decrease friction between the insulating balls, pellets, and particles of insulating sand and powder, and also the friction between these particles and the metallic contacts.
- the pellets or granules can contain cores of metallic powder or such of semiconductors, for example of graphite.
- the present circuit breaker does away with the danger of explosions, always present in oil filled circuit breakers.
- the circuit breaker with solid filler has a greater short circuit interrupting capacity than the corresponding air circuit breaker.
- the solid filler dissipates better heat from the contacts at their passage by rated current.
- the present solid fillers can be used to facilitate current interruption in such devices as starters, contactors, rotary switches, relay contacts, collectors of electrical machines, for eX- ample for a DC. machine with vertical collector immersed in a solid insulating medium of granulated consistency.
- the housing of knife switches with flicker blades can be filled with such medium.
- a circuit breaker comprising, in combination; an enclosure substantially filled with a granulated insulating material; a tubular steady contact means having a flared end, said tubular steady contact means being mounted in said enclosure and completely covered by said granulated insulating material; a movable finger contact means consisting of a pointed longitudinally corrugated tube mounted for cooperative engagement and disengagement with said tubular steady contact means through its flared end, to open and close a circuit; holes in the wall of said tubular steady contact means to allow displacement of the granulated insulating material during engagement of the movable finger contact means with the tubular steady contact means; and said granulated insulating material including a lubricant consisting of talcum powder to decrease friction between the granules of the granulated insulating material and between the granules and the movable and steady contact means.
Description
Oct. 19, 1965 H. GREBER 3,213,251 CIRCUIT BREAKER HAVING ARC EXTINGUISHING MEDIUM OF GRANULATED INSULATING MATERIAL WHICH INCLUDES A LUBRICANT TO DECREASE FRICTION BETWEEN ELEMENTS THEREOF Filed Feb. 5, 1962 INVENTOR.
United States Patent 3,213 251 CIRCUIT BREAKER HAV ING ARC EXTINGUISH- lNG MEDIUM 0F GRANULATED INSULATING MATERIAL WHICH INCLUDES A LUEEEEANT T0 DECREASE ERECTION BETWEEN ELEMENTS THEREOF Henry Greber, 225 W. 80th St., Apt. 8D, New York, N.Y. Filed Feb. 5, 1962, Ser. No. 171,098 1 Claim. (Cl. 200-149) The object of this is to provide a circuit breaker of considerable interrupting capacity whose container is filled with granulated, or pulverized, non-flamable insulating material. The use of small pellets, sand or powder of glass porcelain, steatite and similar solid materials as fillers of circuit breakers opens new possibilities for the latter, by making them explosion-proof, which is particularly important in their application in locations with fire and explosion hazards.
The single figure shows a schematic sectional view of the breaker with solid filler. Numeral 1 designates the movable contact made of a longitudinally corrugated tube provided with point 2. The longitudinal grooves of the corrugation 20 are shown on the surface of tube 1. Movable contact 1 fits into the steady contact 3, made of a tube with holes 4 all along it. End of tube 3 has the form of a funnel 5. Finger contact 1 fits also into another contact 6, made of a tube with two funnel-shaped ends 7 and 8. All contacts are mounted Within an insulating cylinder 9, which is partly filled With granulated or powderized insulating material 10. On the end of finger contact 1 is placed strain insulator 11, through which a mechanism (not shown) moves said finger contact 1 in and out of contact 3. The source of voltage 12 is connected by means of conductor 13 with steady contact 6, and by means of conductor 14 with useful resistance 15, which represents the energy consuming device, and is linked through conductor 16 with steady contact 3. Locknuts 1'7 and 18 and stud 19 serve for connection of conductor 16 to steady contact 3.
In operation of this circuit breaker, as soon as the mobile contact 1 is separated from the steady one 3, the space between them is instantaneously filled with the solid filler 10, and a possible are between the separated contacts is extinguished or prevented. The finer the solid filler, the smaller is the gap between the separated contacts which is immediately filled with the granulated or powderized insulating material. There exists an obvious possibility of using a combination of the above named fillers, pellets and powder, or balls and small granules. Thus the interstices between the pellets and balls are completely filled with sand-shaped or powderized insulating material. Talcum powder, silicon liquid can be used for lubrication, in order to decrease friction between the insulating balls, pellets, and particles of insulating sand and powder, and also the friction between these particles and the metallic contacts. To achieve a breaking up of the arc space into component ones, the pellets or granules can contain cores of metallic powder or such of semiconductors, for example of graphite.
As mentioned the present circuit breaker does away with the danger of explosions, always present in oil filled circuit breakers. At the same time the circuit breaker with solid filler has a greater short circuit interrupting capacity than the corresponding air circuit breaker. In addition to this the solid filler dissipates better heat from the contacts at their passage by rated current. The present solid fillers can be used to facilitate current interruption in such devices as starters, contactors, rotary switches, relay contacts, collectors of electrical machines, for eX- ample for a DC. machine with vertical collector immersed in a solid insulating medium of granulated consistency. The housing of knife switches with flicker blades can be filled with such medium. In the present circuit breaker the volume of its solid, granulated filler can be much smaller than that of a corresponding insulating liquid. Therefore smaller breakers of higher current interrupting capacity than the ones now available can be built according to the present invention. Many modifications and variations of this circuit breaker can be made in the spirit and within the scope of the following claim.
I claim:
A circuit breaker comprising, in combination; an enclosure substantially filled with a granulated insulating material; a tubular steady contact means having a flared end, said tubular steady contact means being mounted in said enclosure and completely covered by said granulated insulating material; a movable finger contact means consisting of a pointed longitudinally corrugated tube mounted for cooperative engagement and disengagement with said tubular steady contact means through its flared end, to open and close a circuit; holes in the wall of said tubular steady contact means to allow displacement of the granulated insulating material during engagement of the movable finger contact means with the tubular steady contact means; and said granulated insulating material including a lubricant consisting of talcum powder to decrease friction between the granules of the granulated insulating material and between the granules and the movable and steady contact means.
References Cited by the Examiner UNITED STATES PATENTS 766,187 8/04 Hellmund 200--151 813,546 2/06 Fellenberg 20012O 2,377,689 6/45 Hyde 200- FOREIGN PATENTS 446,121 6/27 Germany.
KATHLEEN H. CLAFFY, Primary Examiner.
ROBERT K. SCHAEFER, Exan'zl'ner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US171098A US3213251A (en) | 1962-02-05 | 1962-02-05 | Circuit breaker having arc extinguishing medium of granulated insulating material which includes a lubricant to decrease friction between elements thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US171098A US3213251A (en) | 1962-02-05 | 1962-02-05 | Circuit breaker having arc extinguishing medium of granulated insulating material which includes a lubricant to decrease friction between elements thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3213251A true US3213251A (en) | 1965-10-19 |
Family
ID=22622520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US171098A Expired - Lifetime US3213251A (en) | 1962-02-05 | 1962-02-05 | Circuit breaker having arc extinguishing medium of granulated insulating material which includes a lubricant to decrease friction between elements thereof |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3213251A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780243A (en) * | 1972-10-12 | 1973-12-18 | P Koomey | Apparatus for making and breaking an electrical underwater connection between releasable underwater members |
| US20090008229A1 (en) * | 2006-01-25 | 2009-01-08 | Abb Technology Ag | Contact system for a short-circuiting device in a medium-voltage or high-voltage switchboard plant |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US766187A (en) * | 1903-11-28 | 1904-08-02 | Rudolf E Hellmund | Means for extinguishing arcs. |
| US813546A (en) * | 1904-04-28 | 1906-02-27 | Wilhelm Fellenberg | Inclosed safety device for fuses for electrical installations. |
| DE446121C (en) * | 1926-03-20 | 1927-06-24 | Karl Locke | Switching contact in which the interruption and contact formation takes place within a chamber filled with a grainy or powdery insulating material |
| US2377689A (en) * | 1943-05-17 | 1945-06-05 | Corning Glass Works | Dielectric composition |
-
1962
- 1962-02-05 US US171098A patent/US3213251A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US766187A (en) * | 1903-11-28 | 1904-08-02 | Rudolf E Hellmund | Means for extinguishing arcs. |
| US813546A (en) * | 1904-04-28 | 1906-02-27 | Wilhelm Fellenberg | Inclosed safety device for fuses for electrical installations. |
| DE446121C (en) * | 1926-03-20 | 1927-06-24 | Karl Locke | Switching contact in which the interruption and contact formation takes place within a chamber filled with a grainy or powdery insulating material |
| US2377689A (en) * | 1943-05-17 | 1945-06-05 | Corning Glass Works | Dielectric composition |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3780243A (en) * | 1972-10-12 | 1973-12-18 | P Koomey | Apparatus for making and breaking an electrical underwater connection between releasable underwater members |
| US20090008229A1 (en) * | 2006-01-25 | 2009-01-08 | Abb Technology Ag | Contact system for a short-circuiting device in a medium-voltage or high-voltage switchboard plant |
| US7935907B2 (en) * | 2006-01-25 | 2011-05-03 | Abb Technology Ag | Contact system for a short-circuiting device in a medium-voltage or high-voltage switchboard plant |
| CN101375362B (en) * | 2006-01-25 | 2012-09-05 | Abb技术股份有限公司 | Contact system for a short-circuiting device in a medium-voltage or high-voltage switchboard plant |
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