US2581822A - Gas blast circuit breaker having parallel connected impedance - Google Patents
Gas blast circuit breaker having parallel connected impedance Download PDFInfo
- Publication number
- US2581822A US2581822A US104916A US10491649A US2581822A US 2581822 A US2581822 A US 2581822A US 104916 A US104916 A US 104916A US 10491649 A US10491649 A US 10491649A US 2581822 A US2581822 A US 2581822A
- Authority
- US
- United States
- Prior art keywords
- contacts
- piston
- auxiliary
- circuit breaker
- column
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/16—Impedances connected with contacts
- H01H33/167—Impedances connected with contacts the impedance being inserted only while opening the switch
Definitions
- the present invention relates to circuit breakers and in particular to those of the type in which the load contacts are separated under the action of a blast of pressure gas such as compressed air.
- one of the contacts is made hollow and the other in the form of a piston that is normally spring loaded into contact with and closes the mouth of the hollow contact to keep the circuit through the contacts closed.
- the piston contact moves away from the stationary hollow contact thus opening the electrical load. The are created upon separation of the contacts is bathed on all sides by the gas flowing under pressure and hence the general arrangement is highly satisfactory for interrupting heavy loads.
- the object of the present invention is to provide an improved construction for switching in the parallel impedance that features auxiliary contacts for this purpose, these contacts being arranged to be closed in a positive manner by the pressure gas simultaneously with opening of the load contacts and thereafter opened automatlcally after a predetermined time delay so that the auxiliary impedance is connected in parallel with the load contacts only for a limited period.
- Fig. 1 is a vertical view of the improved circuit breaker with certain parts broken away to show structural details; and Fig. 2 is a fragmentary view in vertical section illustrating a modified construction for the auxiliary switch chamber that houses the impedance element and its associated control contacts.
- the circuit breaker includes a hollow insulator column I upstanding upon a tank II that contains air under pressure. At an intermediate point along the column, a ring like plate I! of conductive material is interposed.
- This plate includes a terminal I 3 for the connection of line conductor L; it supports a conductive cylinder I 4 arranged concentrically within the insulator colman that carries a conductive piston contact 55 loaded by spring IS in an upward direction; and also serves as a. support for a transversely extending conduit 11 also of conductive material.
- a cap member i8 also of conductive material and carried at the top of the insulator column l0 includes a terminal 1 9 for connection of the other line terminal L, a transversely extending conductive arm'2ll, and it also serves to support 2. depending hollow contact member 23.
- the latter is provided with a discharge outlet 26 leading to atmosphere and the outlet may if desired include a time delayed reclosing valve (not shown) as described and shown in the previously issued United States Patent No. 2,417,274 if the load contacts are to be maintained in a separated condition "by the pressure gas subse-- quent to their separation.
- a rod 29 carried by piston 2? extends upwardly through an opening 36 in the top end wall of cylinder 28 and terminates in a contact member 3i which is adapted to engage a stationary contact 32 supported in column 25.
- One end of the resistor element is connected to contact 32 and the other end to the outer portion 20a of arm 29 that is fashioned into a cap closing oil the upper end of the auxiliary column 25.
- Cylinder 26 includes a port 34 which upon upward motion of piston 21 places the lower portion of the cylinder in communication with the interior of column 25 thus to permit the compressed air to flow into the column from conduit ll. Due to the opening 34 the air pressure on opposite sides of the piston 21 then becomes equalized and the latter is then free to move to its lowermost position under the restoring force of the loading spring 28. Below the latter position, a check valve 35 is placed in the wall of cylinder 26. This valve opens inwardly upon a drop of the air pressure in conduit I! to facilitate removal of the compressed air from the interior of the column 25 as well as from the interior of cylinder 26 above piston 21.
- auxiliary column 25 is provided with a. transverse partition 36 dividing the interior into an upper chamber Si in which the resistor 33 is placed, and a lower chamber 38 that houses the auxiliary contacts 3!, 32 and the remainder of the control components associated therewith.
- Circuit breaker apparatus comprising a pair of normally closed load contacts separable upon an applicationof pressure gas thereto, an impedance, a'set of normally openauxiliary con- .tacts actuated by said pressure gas and'closed upon an application of said pressuregas to said load contacts disposed within an insulator shut oil! from the atmosphere, said auxiliary contacts being i'or connecting said impedance in parallel with said load contacts upon opening of the latter, and time delayed means restoring said auxiliary contacts to openposition upon termination of a predetermined closure period thereof.
- Circuit breaker apparatus as defined in claim 1 wherein the means restoring said auxiliary contacts to open position comprises a loading spring cooperative with one of said auxiliary contacts, the force applied by said spring being counter to that applied by said pressure gas.
- Circuit breaker apparatus comprising a pair of. normally closed load contacts separable in response vtoan application of pressure gas thereto, an impedance, and means for connecting said impedance in parallel with said load contacts, said connecting means including a pair of normally open auxiliary switch contacts disposed within an insulator shut off from the atmosphere and means controlled by said pressure gas for closing said auxiliary contacts for a predetermined period thereby to temporarily connect said impedance in parallel with said load contacts, the closure period of said auxiliary contacts be,- ing independent of the flow of pressure gas.
- Circuit breaker apparatus comprising a pair of normally closed load contacts separable upon an application of pressure gas thereto, a set of normally open auxiliary contacts disposed within an insulator shut off from the atmosphere, an impedance connected upon closure of said auxiliary contacts in parallel with said load contacts, means actuated by said pressure gas for affecting closure of said auxiliary contacts, and means applying a force counter to that applied by said pressure gas actuated auxiliary contact closure means and effective to reopen said auxiliary contacts upon expiration of a predetermined closure period.
- Circuit breaker apparatus comprising a pair of normally closed load contacts separable .upon an application of pressure gas thereto, an impedance, circuit means normally open at a set of auxiliary contacts for connecting said impedance in parallel with said load contacts, a piston connected to one of said auxiliary contacts, a cylinder within which said piston is slidable, a spring loading said piston to a position of rest wherein said auxiliary contacts are separated, means for introducing said pressure gas into said cylinder at one side of said piston to efiect movement of said piston against the action of said loading spring closing said auxiliary contacts and time delay means eiiecting equalization of gas pressure on both sides of said piston thereby to permit said loading. spring to return said piston to said rest position.
- Circuit comprising a mainhollow insulator column, upper and lower Spaced conductive plate members carried by said column,"a pair of normally closed load contacts supportedrespectively by said plates within said column and which contacts are separable upon an application ofpressure gas thereto admitted to said column, a pair of conductive membersextending laterally from said plate members, an auxiliaryhollow insulator column supported between said' conductive members, one of 'said conductive' members being tubular and in communication with the'interior of said main insulator column for'also admitting said pressure "gas; to said auxiliary column, an impedance within said auxiliary column, a pair of normally open contacts disposed within a chamber portion of-said 5 auxiliary column shut off from the atmosphere, one end of said impedance being electrically connected to one of said conductive members and the other endthereof to one of said auxiliary contacts, and the other of said auxiliary contacts being electrically connected to the other of said conductive members.
- a cylinder into which pres- -sure gas is admitted, a piston connected to one 01' said auxiliary contacts and adapted to slide in said cylinder, a spring loading said piston to a position of rest wherein said auxiliary contacts are separated, said piston being movable upon application of the said pressure gas to one side of said piston against the counteraction of said spring to effect closure of said auxiliary contacts and time delay means effecting a gradual reduction in the difl'erence in gas pressure at opposite sides of said piston thereby to permit said loading spring to return said piston to said rest position.
- circuit breaker apparatus as defined in claim 6 wherein said time delay means is constituted by a port through the side wall of said cylinder and which places both sides of said piston in communication with each other upon a predetermined displacement of said piston.
- circuit breaker apparatus as defined in claim 6 wherein said impedance and auxiliary contacts are contained within separate chambers in said auxiliary column established by partition means in the same.
Landscapes
- Circuit Breakers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3659948 | 1948-07-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2581822A true US2581822A (en) | 1952-01-08 |
Family
ID=4513340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US104916A Expired - Lifetime US2581822A (en) | 1948-07-23 | 1949-07-15 | Gas blast circuit breaker having parallel connected impedance |
Country Status (7)
Country | Link |
---|---|
US (1) | US2581822A (xx) |
BE (1) | BE490292A (xx) |
CH (1) | CH265318A (xx) |
DE (1) | DE806692C (xx) |
FR (1) | FR991047A (xx) |
GB (1) | GB660944A (xx) |
NL (1) | NL73206C (xx) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2794886A (en) * | 1954-03-02 | 1957-06-04 | British Thomson Houston Co Ltd | Electric circuit breakers of the air or gas-blast type |
US2833896A (en) * | 1954-11-24 | 1958-05-06 | British Thomson Houston Co Ltd | Electric circuit breakers of the air or gas-blast type |
US2892913A (en) * | 1955-04-14 | 1959-06-30 | Bbc Brown Boveri & Cie | Air blast switch with auxiliary point of interruption for shunt resistance |
US2977446A (en) * | 1956-10-22 | 1961-03-28 | Westinghouse Electric Corp | Compressed-gas circuit interrupter |
US3482069A (en) * | 1966-12-12 | 1969-12-02 | Gen Electric | Voltage controlling shunting resistor with operating cam contour modifying means |
US3629532A (en) * | 1970-02-20 | 1971-12-21 | Sun Electric Corp | Immediately responsive fluid flow operated switch with normally closed spring contact in flow channel |
CN109724794A (zh) * | 2019-02-19 | 2019-05-07 | 三门核电有限公司 | 一种爆破阀控制回路测试系统 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2665351A (en) * | 1951-02-09 | 1954-01-05 | Asea Ab | Arrangement in air blast circuit breaker provided with damping resistance |
CH331003A (de) * | 1955-02-16 | 1958-06-30 | Bbc Brown Boveri & Cie | Druckgasschalter mit Mehrfachunterbrechung |
CH344466A (de) * | 1955-05-14 | 1960-02-15 | Bbc Brown Boveri & Cie | Druckluftschalter |
GB884854A (en) * | 1957-07-01 | 1961-12-20 | Ass Elect Ind | Improvements in air or gas blast electric circuit-breakers |
CH355196A (de) * | 1957-11-18 | 1961-06-30 | Bbc Brown Boveri & Cie | Schalter mit Widerständen |
DE1207992B (de) * | 1958-08-01 | 1965-12-30 | Bbc Brown Boveri & Cie | Druckluftschalter mit Einfach- oder Mehrfachunterbrechung pro Pol |
FR2658949B1 (fr) * | 1990-02-27 | 1994-05-13 | Gec Alsthom Sa | Disjoncteur a coupure assistee par varistance. |
FR2662848B2 (fr) * | 1990-02-27 | 1994-07-01 | Alsthom Gec | Disjoncteur a coupure assistee par varistance. |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB538672A (en) * | 1939-03-30 | 1941-08-12 | Asea Ab | Compressed air circuit breaker having a resistance bridging the contacts |
GB546399A (en) * | 1940-06-07 | 1942-07-10 | Asea Ab | Improvements in electric compressed air blow-out switches |
US2453555A (en) * | 1943-09-11 | 1948-11-09 | Bbc Brown Boveri & Cie | Gas blast circuit breaker |
-
0
- NL NL73206D patent/NL73206C/xx active
- BE BE490292D patent/BE490292A/xx unknown
-
1948
- 1948-07-23 CH CH265318D patent/CH265318A/de unknown
-
1949
- 1949-06-02 DE DEP44554A patent/DE806692C/de not_active Expired
- 1949-06-23 GB GB16735/49A patent/GB660944A/en not_active Expired
- 1949-07-15 US US104916A patent/US2581822A/en not_active Expired - Lifetime
- 1949-07-21 FR FR991047D patent/FR991047A/fr not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB538672A (en) * | 1939-03-30 | 1941-08-12 | Asea Ab | Compressed air circuit breaker having a resistance bridging the contacts |
GB546399A (en) * | 1940-06-07 | 1942-07-10 | Asea Ab | Improvements in electric compressed air blow-out switches |
US2453555A (en) * | 1943-09-11 | 1948-11-09 | Bbc Brown Boveri & Cie | Gas blast circuit breaker |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2794886A (en) * | 1954-03-02 | 1957-06-04 | British Thomson Houston Co Ltd | Electric circuit breakers of the air or gas-blast type |
US2833896A (en) * | 1954-11-24 | 1958-05-06 | British Thomson Houston Co Ltd | Electric circuit breakers of the air or gas-blast type |
US2892913A (en) * | 1955-04-14 | 1959-06-30 | Bbc Brown Boveri & Cie | Air blast switch with auxiliary point of interruption for shunt resistance |
US2977446A (en) * | 1956-10-22 | 1961-03-28 | Westinghouse Electric Corp | Compressed-gas circuit interrupter |
US3482069A (en) * | 1966-12-12 | 1969-12-02 | Gen Electric | Voltage controlling shunting resistor with operating cam contour modifying means |
US3629532A (en) * | 1970-02-20 | 1971-12-21 | Sun Electric Corp | Immediately responsive fluid flow operated switch with normally closed spring contact in flow channel |
CN109724794A (zh) * | 2019-02-19 | 2019-05-07 | 三门核电有限公司 | 一种爆破阀控制回路测试系统 |
Also Published As
Publication number | Publication date |
---|---|
CH265318A (de) | 1949-11-30 |
NL73206C (xx) | |
BE490292A (xx) | |
FR991047A (fr) | 1951-09-28 |
DE806692C (de) | 1951-06-18 |
GB660944A (en) | 1951-11-14 |
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