摘要:
Gas circuit breakers, gas insulated disconnecting switches, current transformers, gas insulated feeding bus bars and other main component devices making up a gas insulated power switch-gear apparatus used for the power electric substation or the power electric switching station are arranged in at least one straight line in a horizontal plane. Gas insulated main bus bars are arranged substantially at right angles to the straight lines including the component devices, in a different plane parallel to the above-mentioned plane containing the devices, thus reducing the height of the apparatus as a whole and at the same time improving the earthquake-proofness thereof.
摘要:
A gas insulated switch-gear wherein power circuit breakers, disconnecting switches, earthing switches and the like constituting a power electric sub-station are enclosed in earthed metallic vessels and insulation therein is effected by means of insulated arc-suppressing gas is housed in a switching house, a bushing forming a terminal at the electric power line side is provided separately outside of the switching house, and said bushing located outside and gas insulated switch-gear is electrically connected by means of gas insulated bus bar, to thereby eliminate a wall bushing.
摘要:
A gas insulated power switch gear apparatus of a reduced height comprising gas insulated circuit breakers arranged horizontally and disconnecting switches operated vertically is disclosed. Each of the disconnecting switches includes a first sheath portion inserted into an interrupted point of a main bus bar and mechanically connected with the sheath of the main bus bar through an insulating spacer for defining a gas section, and a second sheath portion communicating with the first sheath portion and crossing and extending in the direction perpendicular to the first sheath portion. A collector electrically connected with the conductor of a feeding bus bar is arranged within the second sheath portion, and a movable contactor normally electrically connected with the collector is movable vertically. A fixed contactor electrically connected with the main bus bar conductor and engageable with the movable contactor is arranged within the first sheath portion.
摘要:
A gas insulated switch-gear apparatus having first and second base planes is disclosed. Arranged on the first and second base planes are feeder switching apparatus comprising gas filled circuit breakers and first and second gas insulated disconnecting switches at opposite sides of each of the gas filled circuit breakers. Gas insulated busbar devices are arranged to be horizontally spaced from the feeder switching apparatus. On the first and second base planes, the first gas insulated disconnecting switches are connected to the gas insulated busbar devices while the second gas insulated disconnecting switches are connected to bushings. Axial lines of the feeder switching apparatus along which the first and second gas insulated disconnecting switches are arranged traverse axial lines of the gas insulated busbar devices. The axial lines of the gas insulated busbar devices arranged on the first and second base planes lie in a common vertical plane containing the axial lines and lie in the base planes. A gas insulated connecting busbar device for interconnecting the gas insulated busbar devices arranged on the first and second base planes is arranged in the common vertical plane such that an axial line thereof traverses the axial lines of the gas insulated busbar devices.
摘要:
Gas-insulated switchgear apparatus wherein a device providing a first disconnect gap and a second disconnect gap is located in a sheath filled with an insulating gas and kept at ground potential. The disconnect gaps providing device comprises a first movable contact and a second movable contact which are insulatedly supported by a support device with respect to the sheath. There is provided a device for individually actuating the movable contacts which device comprises a pair of insulated actuating rods disposed adjacent and extending parallel to the insulating support device.
摘要:
An insulating gas-filled disconnecting switch comprises a metallic container filled hermetically with an insulation gas, and a movable electrode and a stationary electrode disposed within the metallic container and electrically insulated from the latter. Means for guiding an arc possibly produced between both electrodes upon separation of the movable electrode from the stationary electrode positively toward a center portion of an opposite end of the stationary electrode, to thereby prevent the arc propagation toward the stationary electrode from reaching the metallic container from the stationary electrode.
摘要:
In an enclosed-type zinc-oxide surge arrester with a grounded tank filled with an insulating medium, and a non-linear resistor assemblage which is connected at one end to a high voltage conductor and at the other end to the ground potential portion within the grounded tank, two or more ring-like shield means such as shield rings are disposed on the high voltage conductor side of the non-linear resistor assemblage at given distances. The use of the ring-like shield means makes more uniform the voltages shared by the respective non-linear resistors. The ring-like shield means may be formed with the configuration and diameter, and the number of them used being properly selected.
摘要:
In a lightning protection system for a wind power generation installation, a conductor ring 16 is provided on a wind mill vane 1 and at a rotor casing 6 incorporating a wind power generator 3 a zinc oxide element 18 is provided so as to face the conductor ring 16 with a spark gap 17, thereby, if a lightning in winter season which causes to flow a large current for a long duration time hits the wind mill vane 1, the wind power generation installation is effectively protected.
摘要:
A transmission line protection system arranged such that a leakage current detector is provided at an end of an insulating device such as an insulator connected at one end to a corresponding one of arms of a steel tower and connected at the other end to a transmission line of each phase, thereby detecting an arrester leakage current flowing in the transmission line of each phase, an output signal of the leakage current detector being led to a repeater through an optical fiber cable, an output of the repeater being transferred to a control/supervisory board in a substation through an optical fiber cable. In the control/supervisory board, preferably, a received digital signal which was converted from an analog signal at said leakage current detector is displayed on a cathode ray tube. In such an arrangement, it is possible to smoothly perform supervision of the status of the transmission lines without causing maloperations due to influences from the transmission lines.
摘要:
In an enclosed-type switching device having at least a pair of electric contacts, a method for checking the contacts without visual inspection wherein with the contacts closed, the resistance value between outer terminals connected to the contacts is measured and compared with a reference resistance value, so that the result of comparison is used to determine the degree of damage of the contacts. Also disclosed is an auxiliary apparatus for use with an enclosed-type switching device to facilitate application of the above-mentioned method, especially when the switching device is equipped with a plurality of parallel-connected sequentially closed or opened contact pairs. The auxiliary apparatus is arranged to interrupt the sequential operation of the contact pairs so that the resistance is measured during the interruption of the operation.