Gas breakers

Claim 2

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. resistance inserting means consisting of a resistor and cooperating resistance contactor means, d. means for operating said resistance contactor means so as to insert said resistor into the power transmission line incident to the gas pressure variation in said compressing means and prior to closing of said main contactor means, and e. means for biasing said main contactor means and compressing means in a closing or breaking direction.

Claim 3

A gas breaker according to claim 1, in which said main contactor means and resistance contactor means respectively have common shield rings for mitigating the interpole field and a movable contactor of said resistance contactor means is retracted inwardly of the associated shield ring when said main contactor means are in a breaking state.

Claim 4

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. a hermetically sealed container containing a highly insulative, highly arc-suppressing gas, b. main contactors for forming a main electric circuit arranged opposite to each other within said container so as to form an arc therebetween, c. means for compressing said arc-suppressing gas incident to the breaking operation of said main contactor means, d. resistance inserting means consisting of a resistor and cooperating resistance contactor means, e. means for operating a resistance movable contactor of said resistance contactor means in a closing direction by virtue of a gas pressure difference between the gas pressure in said compressing means and the arc-suppressing gas pressure in said container only at the time of closing operation in which the gas pressure in said compressing means becomes lower than the arc-suppressing gas pressure in said container, and thereby for inserting said resistor into the power transmission line prior to closing of said main contactor means, f. means for biasing said main contactor means and compressing means in a closing or breaking direction, and g. means for directing the pressurized gas in said compressing means toward said arc.

Claim 5

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. a hermetically sealed container containing a highly insulative, highly arc-suppressing gas, b. main contactors for forming a main electric circuit arranged opposite to each other within said container so as to form an arc therebetween, c. means for compressing said arc-suppressing gas incident to the breaking operation of said main contactor means, d. resistance inserting means consisting of a resistor and cooperating resistance contactor means, e. means for operating a resistance movable contactor of said resistance contactor means in a closing direction by virtue of a gas pressure difference between the gas pressure in said compressing means and the arc-suppressing gas pressure in said container only at the time of closing operation in which the gas pressure in said compressing means becomes lower than the arc-suppressing gas pressure in said container, and thereby for inserting said resistor into the power transmission line prior to closing of said main contactor means, f. means for biasing said main contactor means and compressing means in a closing or breaking direction, and g. means for directing the pressurized gas in said compressing means toward said arc.

Claim 6

A gas breaker according to claim 3, in which said means (e) for operating the resistance movable contactor comprises an auxiliary cylinder provided along the outer wall of a puffer cylinder which constitutes the coMpressing means, a drive piston slidably disposed in said auxiliary cylinder and carrying said resistance movable contactor, and a spring disposed between said auxiliary cylinder and drive piston and constantly biasing said resistance movable contactor in a closing direction other than when the gas pressure in the compressing means is lower than the gas pressure in the container.

Claim 7

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of a resistor and cooperating resistance contactor means, e. means for operating said resistance contactor means so as to insert said resistor into the power transmission line by virtue of a progressively increasing gas pressure difference between the varying gas pressure in said compressing means and the varying gas pressure in said counter-compressing means prior to closing of said main contactor means, and f. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 8

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of a resistor and cooperating resistance contactor means, e. means for operating said resistance contactor means so as to insert said resistor into the power transmission line by virtue of a progressively increasing gas pressure difference between the varying gas pressure in said compressing means and the varying gas pressure in said counter-compressing means prior to closing of said main contactor means, and f. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 9

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. a hermetically sealed container containing a highly insulative, highly arc-suppressing gas, b. main contactor means for forming a main electric circuit arranged opposite to each other within said container so as to form an arc therebetween, c. means for compressing said arc-suppressing gas incident to the breaking operation of said main contactor means, d. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, e. resistance inserting means consisting of a resistor and cooperating resistance contactor means, f. means for operating a movable contactor of said resistance contactor means so as to insert said resistor into the power transmission line by virtue of a gas pressure difference between the gas pressure in said compressing means and the gas pressure in said counter-compressing means prior to closing of said main contactor means only at the time of closing operation in which the gas pressure in said compressing means becomes lower than the gas pressure in said container, g. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction, and h. means for directing the pressurized gas in said compressing means toward said arc.

Claim 10

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. a hermetically sealed container containing a highly insulative, highly arc-suppressing gas, b. main contactor means for forming a main electric circuit arranged opposite to each other within said container so as to form an arc therebetween, c. means for compressing said arc-suppressing gas incident to the breaking operation of said main contactor means, d. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, e. resistance inserting means consisting of a resistor and cooperating resistance contactor means, f. means for operating a movable contactor of said resistance contactor means so as to insert said resistor into the power transmission line by virtue of a gas pressure difference between the gas pressure in said compressing means and the gas pressure in said counter-compressing means prior to closing of said main contactor means only at the time of closing operation in which the gas pressure in said compressing means becomes lower than the gas pressure in said container, g. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction, and h. means for directing the pressurized gas in said compressing means toward said arc.

Claim 11

A gas breaker according to claim 6, in which said compressing means and counter-compressing means are composed integrally of a cylinder and a piston slidably disposed in said cylinder to divide the interior of said cylinder into two chambers and one of said two chambers in which the arc-suppressing gas is compressed incident to the breaking operation of said main contactor means is utilized as the compressing means and the other one of them is utilized as the counter-compressing means.

Claim 12

A gas breaker according to claim 6, in which said means for operating the resistance movable contactor comprises an auxiliary cylinder provided along the outer wall of a puffer cylinder which constitutes the compressing means and counter-compressing means, a drive piston slidably disposed in said auxiliary cylinder and carrying said resistance movable contactor, and a spring disposed between said aUxiliary cylinder and drive piston and constantly biasing said resistance movable contactor in a breaking direction other than when the gas pressure in the compressing means is lower than the gas pressure in the container, and further one of the two chambers in said auxiliary cylinder divided by said piston in which said spring is disposed is communicated with said compressing means, while the other one of them is communicated with said counter-compressing means.

Claim 13

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. resistance inserting means consisting of two or more resistors of different resistance values and cooperating resistance contactor means, d. means for operating said resistance contactor means incident to the gas pressure variation in said compressing means and prior to closing of said main contactor means so as to insert said resistors sequentially from one of the higher resistance value, and e. means for biasing said main contactor means and compressing means in a closing or breaking direction.

Claim 14

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. resistance inserting means consisting of two or more resistors of different resistance values and cooperating resistance contactor means, d. means for operating said resistance contactor means incident to the gas pressure variation in said compressing means and prior to closing of said main contactor means so as to insert said resistors sequentially from one of the higher resistance value, and e. means for biasing said main contactor means and compressing means in a closing or breaking direction.

Claim 15

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. resistance inserting means consisting of a first resistor group consisting of two or more resistors arranged radially with respect to a stationary contactor of said main contactor means, stationary contactors of resistance contactor means arranged in substantially the same plane as the free ends of the stationary contactors of said main contactor means on said first resistor group, a second resistor group connecting said stationary contactors annularly on said plane and movable contactors arranged opposite to said respective stationary contactors, d. interpole field mitigating means consisting of said annularly arranged second resistor group and a shield ring arranged in substantially the same plane as the free ends of movable contactors of said main contactor means opposite to said second resistor group, said shield ring being adapted to receive said resistance movable contactors inwardly thereof, e. means for inserting said first and second resistor groups into the power transmission line by sequentially bringing said respective resistance movable contactors into their closing positions incident to the gas pressure variation in said compressing means and prior to closing of said main contactor means, and d. means for biasing said main contactor means and compressing means in a closing or breaking direction.

Claim 16

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. resistance inserting means consisting of a first resistor group consisting of two or more resistors arranged radially with respect to a stationary contactor of said main contactor means, stationary contactors of resistance contactor means arranged in substantially the same plane as the free ends of the stationary contactors of said main contactor means on said first resistor group, a second resistor group connecting said stationary contactors annularly on said plane and movable contactors arranged opposite to said respective stationary contactors, d. interpole field mitigating means consisting of said annularly arranged second resistor group and a shield ring arranged in substantially the same plane as the free ends of movable contactors of said main contactor means opposite to said second resistor group, said shield ring being adapted to receive said resistance movable contactors inwardly thereof, e. means for inserting said first and second resistor groups into the power transmission line by sequentially bringing said respective resistance movable contactors into their closing positions incident to the gas pressure variation in said compressing means and prior to closing of said main contactor means, and d. means for biasing said main contactor means and compressing means in a closing or breaking direction.

Claim 17

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of two or more resistors of different resistance values and cooperating resistance contactor means, e. means for operating the resistance contactor means so as to insert said resistors into the power trAnsmission line sequentially from one of the higher resistance value by virtue of a progressively increasing gas pressure difference between the varying gas pressure in said compressing means and the varying gas pressure in said counter-compressing means prior to closing of said main contactor means, and f. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 18

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of two or more resistors of different resistance values and cooperating resistance contactor means, e. means for operating the resistance contactor means so as to insert said resistors into the power trAnsmission line sequentially from one of the higher resistance value by virtue of a progressively increasing gas pressure difference between the varying gas pressure in said compressing means and the varying gas pressure in said counter-compressing means prior to closing of said main contactor means, and f. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 19

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of a first resistor group consisting of two or more resistors arranged radially with respect to a stationary contactor of said main contactor means, stationary contactors of resistance contactor means arranged in substantially the same plane as the free ends of the stationary contactors of said main contactor means on said first resistor group, a second resistor group connecting said stationary contactors annularly on said plane and movable contactors arranged opposite to said respective stationary contactors, e. interpole field mitigating means consisting of said annularly arranged second resistor group and a shield ring arranged in substantially the same plane as the free ends of movable contactors of said main contactor means opposite to said second resistor group, said shield ring being adapted to receive said resistance movable contactors inwardly thereof, f. means for inserting said first and second resistor groups into the power transmission line by sequentially bringing said respective resistance movable contactors into their closing positions prior to closing of said main contactor means by virtue of a progressively increasing gas pressure difference between the varying gas pressures in said compressing means and counter-compressing means, and g. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 20

A gas breaker of the type in which an arc-suppressing gas is compressed immediately before the current is broken and the resultant pressurized gas is blown against the arc formed between contactors thereby to extinguish said arc, comprising a. main contactor means for forming a main electric circuit arranged opposite to each other so as to form an arc therebetween, b. means for compressing said arc-suppressing gas, c. counter-compressing means for providing a gas pressure variation exactly contrary to the gas pressure variation in said compressing means, d. resistance inserting means consisting of a first resistor group consisting of two or more resistors arranged radially with respect to a stationary contactor of said main contactor means, stationary contactors of resistance contactor means arranged in substantially the same plane as the free ends of the stationary contactors of said main contactor means on said first resistor group, a second resistor group connecting said stationary contactors annularly on said plane and movable contactors arranged opposite to said respective stationary contactors, e. interpole field mitigating means consisting of said annularly arranged second resistor group and a shield ring arranged in substantially the same plane as the free ends of movable contactors of said main contactor means opposite to said second resistor group, said shield ring being adapted to receive said resistance movable contactors inwardly thereof, f. means for inserting said first and second resistor groups into the power transmission line by sequentially bringing said respective resistance movable contactors into their closing positions prior to closing of said main contactor means by virtue of a progressively increasing gas pressure difference between the varying gas pressures in said compressing means and counter-compressing means, and g. means for biasing said main contactor means, compressing means and counter-compressing means in a closing or breaking direction.

Claim 21

A gas breaker according to claim 12, in which said compressing means and counter-compressing means are composed integrally of a cylinder and a piston slidably disposed in said cylinder to divide the interior of said cylinder into two chambers and one of said two chambers in which the arc-suppressing gas is compressed incident to the breaking operation of said main contactor means is utilized as the compressing means and the other one of them is utilized as the counter-compressing means.

Claim 22

A gas breaker according to claim 12, in which said means for operating the resistance movable contactors each comprises an auxiliary cylinder provided along the outer wall of a puffer cylinder which constitutes the compressing means and counter-compressing means, a drive piston slidably disposed in said ausiliary cylinder and carrying said resistance movable contactor, and a spring disposed between said auxiliary cylinder and drive piston and constantly biasing said resistance movable contactor in a breaking direction other than when the gas pressure in the compressing means is lower than the gas pressure in the container, and further one of the two chambers in said auxiliary cylinder divided by said piston in which said spring is disposed is communicated with said compressing means, while the other one of them is communicated with said counter-compressing means.