Abstract:
A gas circuit breaker includes a sealed container in which the arc-extinguishing gas is enclosed, a first fixed contactor portion and a second fixed contactor portion fixed to the sealed container, and a movable contactor portion which moves between the first fixed contactor portion and the second fixed contactor portion, to conduct and break current between them, in which an arc generated at a time of current breaking action is extinguished by spraying the arc-extinguishing gas, the gas circuit breaker includes a gas chamber configured to accumulate the unnecessary gas, the sealed container is formed by joining ends of the two hollow truncated cone portions, each having a large opening diameter, with the cylindrical portion therebetween, and the gas chamber is formed inside the cylindrical portion forming the sealed container.
Abstract:
A puffer circuit interrupter is taught. Arc extinguishing gas is vented through a hollow stationary arc contact into a gas condenser. The gas condenser is an elongated toroid having a well-defined open central region. The gas condensing portion of the toroid is formed from overlapping layers of wound copper mesh. The elongated central opening of the toroid is aligned with the hollow electrode for receiving the arc quenching gas. At one end of the condenser is an external conductor for the puffer circuit interrupter. At the other end of the condenser is a disc having a central opening therein through which the hollow electrode protrudes. The condenser is thus firmly maintained longitudinally between the disc and the external electrode. Surrounding the circumferential periphery of the condenser and bridging the space between the disc and the electrode are longitudinally disposed circumferentially spaced fingers. The spaced fingers form a support cage for the condenser. Furthermore, the fingers extend longitudinally beyond the disc for making electrical contact with a movable contact in the circuit breaker apparatus. These fingers thus act as the rated current carrying conductors when the circuit breaker apparatus is in the closed state.
Abstract:
The high pressure drier of a two pressure circuit breaker is placed at high pressure only during the time that the compressor is operating. The high pressure of the drier bleeds back to the low pressure system through a calibrated orifice in the oil return line to the compressor. The normal pressure of the high pressure drier is low enough that gas heaters are not needed to protect against liquefaction of sulfur hexafluoride gas.
Abstract:
A compressed gas circuit breaker is disclosed having a closed gas circuit, in which an electro-negative gas (preferably sulphur hexafluoride) serves as the quenching medium to quench any electrical arc formed between two electrical contacts upon the operation of the breaker. In the device the gas flows from a high-pressure tank where the gas is stored into a low-pressure space containing a quenching chamber where the electrical contacts are located. The flow occurs upon the opening of a blast valve connecting the high-pressure tank with the low pressure space and the quenching chamber. The high pressure is obtained by means of two pressure producing devices. The first is a compressor which, after the operation of the breaker, returns the gas from the low-pressure space to the high-pressure tank and raises the pressure of the gas to a pressure lower than the liquefaction pressure of the gas at low operating temperatures. The gas is thereupon stored in the high-pressure tank under these conditions until the breaker operates again. The high-pressure tank further contains a second gas compression means by which the gas pressure is further increased to a higher pressure at the time it is supplied to the quenching chamber or low-pressure space when the electrical arc is formed by the operation of the circuit breaker.
Abstract:
A system for use in electrical apparatus having contacts immersed in a body of insulating fluid and adapted to open and close causing arcing therebetween which produces contaminants in the fluid. The system includes a compartment for relatively closely confining said contacts, a fluid inlet in said compartment, a filter, and means, including a pump, for withdrawing fluid from the compartment through the inlet, pumping the withdrawn fluid through the filter, and returning the filtered fluid to said body of fluid. Contaminants produced in the fluid in the compartment by arcing of the contacts are thus filtered without being permitted to disperse throughout the body of fluid. As a method of preventing contaminant dispersal, the disclosure teaches withdrawing fluid of the body from a location closely adjacent the contacts, filtering the withdrawn fluid to remove the contaminants and subsequently returning the filtered fluid to the body of fluid.