摘要:
The present disclosure provides controllers for power distribution network circuit interrupting devices and provides electronic control circuits for inclusion in such controllers. The electronic control circuit has a boost circuit, a capacitor storage unit and a pulse width modulator control circuit. The boost circuit boosts an input voltage to a value to supply sufficient energy to a protective relay solenoid to energize the solenoid. The capacitor storage unit stores the boosted voltage from the boost circuit. The pulse width modulator control circuit is responsive to a control and enable circuit to selectively enable energy from the capacitor to energize the one or more protective relays in power distribution system circuit interrupting device.
摘要:
The present invention discloses a contact module for circuit breaker. The contact module comprises: a base, a cover, an operation mechanism, three kinds of single-pole switches and a release mechanism. The cover is mounted on the base to form an accommodation space, the operation mechanism, the three kinds of single-pole switches and the release mechanism are disposed in the accommodation space. The operation mechanism is connected to one kind of the single-pole switch, the release mechanism is connected to the three kinds of the single-pole switches. All of the three kinds of single-pole switches are asymmetrical. Each kind of single-pole switch comprises a strong side and a weak side, for each kind of single-pole switch, a contact housing on the strong side is thick and is connected to a thick shaft, a contact housing on the weak side is thin and is connected to a thin shaft. A rotor component in each kind of single-pole switch only has a single contact spring and the single contact spring is mounted on the weak side. Rotation shafts of adjacent single-pole switches are connected by a linkage shaft so that the single-pole switches are connected, a strong side of one single-pole switch is connected to a weak side of another single-pole switch.
摘要:
A circuit breaker including an ejection device including an arc-extinction medium for improved extinction of an arc formed during a breaker operation and an exhaust-cooling medium for improved cooling of exhaust gases in the circuit breaker. Thereby, the arc-extinction liquid includes an organofluorine compound having a boiling point Tb at 1 bar higher than −60° C. and being selected from the group of: a fluoroether; a fluoroamine; a fluoroketone; and mixtures thereof.
摘要:
A gas-blast switch has a housing which encloses an arcing chamber, an accumulator space and an expansion space. Two relatively moveable contact members are arranged in the housing. One of the contact members moves through a nozzle. The nozzle is formed of and defined by two moveable nozzle parts, the relative position of which determines the size of a discharge cross-section in the nozzle. During a switching-off operation, the moveable contact member moves out of the arcing chamber and quenching gas flows from the accumulator space into the expansion space, through the arcing chamber, i.e. the nozzle. The size of discharge cross-section of the nozzle varies through movement of the nozzle parts which respond to pressure created in the switch, without the assistance of elaborate compression springs. To this end, the nozzle parts are freely mounted to move in response to pressures generated in the switch and they are disposed in the gas path between the arcing chamber and the accumulator space.
摘要:
A rotating arc circuit breaker comprises a blow-out coil fitted at the rear face of an annular electrode and containing a ferromagnetic core. A gas outlet channel is contrived inside coil in order to prevent any formation of an ionized gas lock in the zone defined by the rotating arc.
摘要:
A disconnect switch and grounding apparatus therefor particularly adapted for use in gas insulated substations. The disconnect switch comprises a chamber having a pair of electrical conductors entering the chamber. Supporting the conductors and insulating them from contact with the chamber itself are insulators, which may be sealingly placed so as to prohibit the escape of the gas. A fixed contact member electrically attached to the first of the pair of conductors and a movable contact member is electrically attached to the second pair of conductors. A movement mechanism to move the movable contact members so as to make and break contact with the fixed contact member. A grounding strip electrically attached to the movable contact member, positioned so as to come in contact with the chamber wall immediately after the breaking of contact between the fixed and the movable contact members. The movement mechanism comprises a linkage having two links, the first link attached at one end to the movable contact member and the other end connected to the second link, the other end of the second link being connected to a shaft member. The shaft member sealingly extends through the wall of the chamber having attached to it on the outside of the chamber a handle for causing the shaft to rotate. The shaft upon rotation engages the linkage causing the movable contact member to make or break contact with the fixed contact member and respectively the ground strip to move away from or come in contact with the wall of the chamber.
摘要:
Rotary disconnect switch assembly, including a metal encapsulation insulated with SF.sub.6 gas, flanges integral with the encapsulation, support insulators disposed on the flanges, a drive shaft passing through the encapsulation and having a portion disposed outside and a portion disposed inside the encapsulation, a drive connected to the outside portion of the drive shaft, a profile formed on the inside portion of the drive shaft, three disconnect blades fastened side by side in axial direction of the inside portion of the drive shaft, intermediate pieces passing through the support insulators being connectible to phase conductors, and an opposite pair of first and second fixed contacts for each individual phase connected along the intermediate pieces in axial direction of the drive shaft, the blades being rotatable between an "on" position in which they connect the first and second contacts to each other and a "disconnect" position.
摘要:
A gastight dynamic seal sealing the pressurized enclosure of a compressed-gas circuit interrupter to a rotatable through control shaft. Radial partition walls of a sleeve surrounding the shaft define a plurality of liquid-filled gas-trap chambers separated by small throttle passageways causing the gas leaking through elastomer joints disposed in some of said chambers to be dissolved in the liquid in degressive concentration, going from the pressurized side of the seal towards the atmospheric side thereof.
摘要:
A structural component such as nozzle-forming member to be utilized in conjunction with the arc quenching chamber of an electrical circuit breaker operating with a pressurized gaseous fluid such as SF.sub.6 and made from a polytetrafluoroethylene composition that is gas-emissive under influence of heat generated by the arc in the vicinity of the nozzle is provided with a system of gas-conducting passageways to permit such gas to escape from sub-surface cavities formed by deterioration of the composition rather than accumulate therein which leads ultimately to undersirable chipping off of pieces of the surface. These passageways may be constituted by a system of blind holes or by a system of grooves.
摘要:
An improved method and apparatus for extinguishing the arc in a gas flow circuit breaker of the type in which one or more of the contacts is designed as a nozzle. The end surface of the nozzle and a portion of its inner surface are insulated so that the arc will be drawn inside the nozzle to a point from which current will flow in a direction so as to generate a magnetic field which will tend to force the arc into the center of the nozzle thereby resulting in quicker extinguishing action.