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US 6,529,009 B2Granted
Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof
AssigneeHitachi, Ltd.
InventorsShuuichi Kikukawa, Katsunori Kojima, Tooru Tanimizu, Ayumu Morita, Masashige Tsuji
Life of this patent
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Abstract
A vacuum switch is composed by installing a vacuum circuit-breaker and a disconnector in different grounded vacuum vessels, respectively, and a vacuum-measurement device is attached to each grounded vacuum vessel. The above vacuum vessel communicates with one of the grounded vacuum vessels, and the degree of vacuum in the vacuum vessel can be directly measured and monitored.
Claims11
A vacuum switch comprising:
- grounded vacuum vessels in which a vacuum circuit-breaker portion and a disconnector portion are contained respectively;
- vacuum-measurement devices which are attached to said grounded vacuum vessels, respectively;
- and
- vacuum pumps which are attached to said grounded vacuum vessels, respectively.
1 more element
A vacuum switch comprising:
- a vacuum vessel containing a fixed electrode, and a movable electrode which is connected to or disconnected from said fixed electrode, of a circuit-breaker;
- a first grounded vacuum vessel, electrically insulated from said vacuum vessel, which contains said vacuum vessel;
- a second grounded vacuum vessel, electrically insulated from said first grounded vacuum vessel, which contains a disconnector and a grounding switch;
- an insulation bushing which is projected from said first grounded vacuum vessel;
- a load conductor which is led out of a bushing of said second grounded vacuum vessel;
- a grounding conductor which is led out a bushing of said second grounded vacuum vessel;
- first and second vacuum-measurement devices which are attached to said first and second grounded vacuum vessels respectively;
- a first operating rod for driving a movable blade of said movable electrode of said circuit-breaker;
- and
- a second operating rod, located substantially in the coaxial direction with said first operating rod, for driving a movable blade for said movable electrode of said disconnector.
7 more elements
A vacuum switch comprising:
- a vacuum vessel containing a fixed electrode, and a movable electrode which is connected to or disconnected from said fixed electrode, of a circuit-breaker;
- a first grounded vacuum vessel, electrically insulated from said vacuum vessel, which contains and communicates with said vacuum vessel;
- a second grounded vacuum vessel, electrically insulated from said first grounded vacuum vessel, which contains a disconnector and a grounding switch;
- an insulation bushing which is projected from said first grounded vacuum vessel;
- a load conductor which is led out of a bushing of said second grounded vacuum vessel;
- a grounding conductor which is led out of a bushing of said second grounded vacuum vessel;
- first and second vacuum-measurement devices which are attached to said first and second grounded vacuum vessels respectively;
- a first operating rod for driving a movable blade of said movable electrode of said circuit-breaker;
- and
- a second operating rod, located substantially in the coaxial direction with said first operating rod, for driving a movable blade for said movable electrode of said disconnector.
7 more elements
A vacuum switchgear comprising:
- a vacuum switch, in which a vacuum circuit-breaker and a disconnector are contained in different grounded vacuum vessels, respectively, including a vacuum-measurement device attached to each grounded vacuum vessel;
- and
- operation units for driving respective movable electrodes situated in said vacuum switch.
A vacuum switchgear comprising:
- a vacuum switch, in which a vacuum circuit-breaker and a disconnector are contained in different grounded vacuum vessels, respectively, including a vacuum-measurement device and a vacuum pump attached to each grounded vacuum vessel;
- and
- operation units for driving respective movable electrodes situated in said vacuum switch.
A vacuum switchgear comprising:
- a vacuum vessel containing a fixed electrode, and a movable electrode which is connected to or disconnected from said fixed electrode, of a circuit-breaker;
- a first grounded vacuum vessel, electrically insulated from said vacuum vessel, which contains said vacuum vessel;
- a second grounded vacuum vessel, electrically insulated from said first grounded vacuum vessel, which contains a disconnector and a grounding switch;
- an insulation bushing which is projected from said first grounded vacuum vessel;
- a load conductor which is led out of a bushing of said second grounded vacuum vessel;
- a grounding conductor which is led out of a bushing of said second grounded vacuum vessel;
- first and second vacuum-measurement devices which are attached to said first and second grounded vacuum vessels respectively;
- a first operating rod for driving a movable blade of said movable electrode of said circuit-breaker;
- a second operating rod, located substantially in the coaxial direction with said first operating rod, for driving a movable blade for said movable electrode of said disconnector;
- operation units, which are connected to said movable blade connected to said first operating rod, and said second operating rod, respectively;
- and
- a control unit for controlling said operation units.
9 more elements
A vacuum switch comprising:
- a vacuum vessel containing a fixed electrode, and a movable electrode which is connected to or disconnected from said fixed electrode, of a circuit-breaker;
- a first grounded vacuum vessel, electrically insulated from said vacuum vessel, which contains and communicates with said vacuum vessel;
- a second grounded vacuum vessel, electrically insulated from said first grounded vacuum vessel, which contains a disconnector and a grounding switch;
- an insulation bushing which is projected from said first grounded vacuum vessel;
- a load conductor which is led out of a bushing of said second grounded vacuum vessel;
- a grounding conductor which is led out of a bushing of said second grounded vacuum vessel;
- first and second vacuum-measurement devices which are attached to said first and second grounded vacuum vessels respectively;
- a first operating rod for driving a movable blade of said movable electrode of said circuit-breaker;
- a second operating rod, located substantially in the coaxial direction with said first operating rod, for driving a movable blade for said movable electrode of said disconnector;
- operation units, which connect to said movable blade connected to said first operating rod, and said second operating rod, respectively;
- and
- a control unit for controlling said operation units.
9 more elements
A method of operating a vacuum switch, which includes a vacuum circuit-breaker and a disconnector, contained in different grounded vacuum vessels, respectively, including a vacuum-measurement device and a vacuum pump being attached to each grounded vacuum vessel;
- wherein the degree of vacuum in a vacuum switchgear including said vacuum switch and operation units for driving respective movable electrodes of said vacuum switch, is continuously monitored, and when the degree of vacuum in at least one of said grounded vacuum vessels deteriorates to less than a predetermined degree, the degree of vacuum in a corresponding one of, said vacuum vessel containing said vacuum circuit-breaker and said grounded vacuum vessels, is increased by operating said vacuum pump of said corresponding vessel.
Dependencies are inferred from the claim text.