Enclosed high voltage circuit breaker
AssigneeASEA Aktiebolag
InventorsSten Berneryd, Per-Olof Grune
Life of this patent
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Abstract
An enclosed high voltage circuit breaker with a sulphur hexafluoride insulating and arc-extinguishing medium includes breaking gaps arranged in a high-pressure chamber which, during breaking is put into communication with a low-pressure chamber through blast valves. A closing resistor is connected in series at each end with a contact device which, upon closing, connects the resistor in parallel with the main breaking gaps before they are closed. The resistor contact device is arranged in the high-pressure chamber while the closing resistor is arranged in a separate tank substantially entirely separated from the low-pressure chamber.
Claims5
An enclosed high voltage circuit breaker of the two-pressure type having means for controlling breaking and closing operations, comprising:
- a high pressure chamber and a low pressure chamber;
- said high pressure chamber containing a gaseous insulating and arc-extinguishing medium comprising a fluorine containing compound, and including main breaking gaps mounted therein;
- at least one blast valve for interconnecting said high pressure chamber with said low pressure chamber during breaking operation;
- a tank isolated from said low pressure chamber and said high pressure chamber, and including a closing resistor mounted therein;
- and
- said high pressure chamber further including contact means for connecting said closing resistor in parallel with said main breaking gaps during closing operation.
Dependencies are inferred from the claim text.