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JP03151610 |
PURPOSE: To prevent gas leak and obtain a highly reliable on-load tap changer by placing a motor for driving the on-load tap changer and a transmission shaft for transferring the driving force, in insulating gas in a tank. CONSTITUTION: ...
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JP03120708 |
PURPOSE: To obtain a magnetic pulse compressor for strengthening insulation of a small gap and having a saturable reactor with high withstand pressure by coating in iron core of the saturable reactor and an outer periphery of an insulati...
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JP03116913 |
PURPOSE: To make it possible to detect the abnormal state of auxiliary machines before developing into a major trouble by a method wherein the signal of a voltage and current detecting sensor is connected to a microcapacitor and the like...
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JP03112112 |
PURPOSE: To prevent partial temperature rise so as to elevate cooling efficiency and arrange it inside a transformer tank by bringing a current limiting resistor into contact with a liquid cooling medium. CONSTITUTION: Current limiting r...
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JP03094408 |
PURPOSE: To eliminate, waste of an overrating without making a high-voltage generation apparatus and capacity of a power supply large by a method wherein a turn-ratio changeover terminal is installed on the primary side or the secondary ...
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JP03091212 |
PURPOSE: To obtain a space for disposing high voltage tap leads and to reduce in size by dividing a main leg into right and left legs, and altering differently the laminated thicknesses of the right and left main legs, side leg and upper...
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JP03083310 |
PURPOSE: To provide an on-load tap changer provided with a cam by which smooth rotating motion is obtained both in a two-phase device and in a single- phase device by arranging a wave motion suppressing and controlling device at the zero...
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JP03077302 |
PURPOSE: To drastically reduce story-height dimension of a building in an installation space. to reduce construction cost and to enhance earthquake-resistance strength by a method wherein an inspection space of internal elements of an on...
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JP03072608 |
PURPOSE: To make the title power supply device miniaturized and slim types by a method wherein, as for the inductance of a DC output power supply device which is boosting, lowering DC input or converting polarity, coil wirings on the sam...
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JP03070105 |
PURPOSE: To achieve compact, low cost, and mechanically and electrically suitable construction by providing a mounting flange for mounting a metal mirror plate or an insulator mirror plate to a partition cylinder and causing the potentia...
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JP03057137 |
PURPOSE: To prevent the breakdown of an energy accumulating spring by an excessive stress by providing two rotatable cylindrical members between an output shaft or input shaft forming a guide bar and a coil spring. CONSTITUTION: Between ...
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JP03053510 |
PURPOSE: To make it possible to continue operation without stopping a transformer when an inspection is conducted or a trouble occurs by a method wherein a commonly used programmable controller is provided on each bank, and also a spare ...
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JP03050707 |
PURPOSE: To make not only the balance of ampere turns favariable but also the configuration of this transformer compact and manufacture it easily by allowing tap windings of principal connection and T-connection transformers to be wound ...
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JP03032215 |
PURPOSE: To improve the reliability at high repetitive operation by adopting the constitution such that a pulse voltage or a pulse current setting a gate starting point is fed to a main saturable reactor via a 2nd saturable reactor provi...
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JP03016205 |
PURPOSE: To reduce control power by a method wherein a pair of second sym metric closed magnetic circuits having slits are provided on both sides of a pair of first symmetric closed magnetic circuits sharing a center leg while coils for ...
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JP03006805 |
PURPOSE: To improve a winding utility rate and to improve efficiency by forming two low voltage tap winding which are to be connected in series for connection with a low-voltage coil for the highest voltage and to be connected in paralle...
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JP03006806 |
PURPOSE: To discharge stored energy of a compression spring and to adjust a switching time by providing a weight at a shaft provided on a driving shaft, and variably providing a weight mounting position. CONSTITUTION: A weight 21 having ...
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JP02303104 |
PURPOSE: To prevent an abnormal drop of load voltage generated by inrush current generation and generation of waveform strain by suppressing an inrush current generated in a moment of changeover from a circuit supplying power supply volt...
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JP02283007 |
PURPOSE: To obtain a tap switching transformer of an equivalent tap switching system which can control the potential rise of a tap winding caused by an abnormal voltage, etc., by constituting the tap winding in such a way that the windin...
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JP02281718 |
PURPOSE: To interrupt switching operation when any abnormality is predicted or when it is produced, by deciding whether or not the switching operation is correct by estimating switching time interval between taps on the basis of a signal...
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JP02273978 |
PURPOSE: To generate magnetic flux efficiently in a core and improve magnetic switch performance characteristics of a saturable reactor by forming the 1st and 2nd conducting members into each cylindrical shape and putting current supply ...
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JP02272710 |
PURPOSE: To be small-sized and to get good balance of ampere-turn by a method wherein a tap winding is an independent separate winding, the tap winding is made multiple winding, especially a primary U-phase tap winding and a primary W-ph...
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JP02267906 |
PURPOSE: To prevent the generation of local excessive heating of an iron core and an iron core clamping fittings by making the total current of lead wires be cancelled as a whole. CONSTITUTION: A tap winding is divided into an inner laye...
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JP02260618 |
PURPOSE: To obtain constant voltage safely and reliably by a method wherein a plurality of shapes of plugs are provided, a power source cord, having a plug of the shape corresponding to power source voltage, is selected. CONSTITUTION: Co...
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JP02249214 |
PURPOSE: To efficiently cool a current limiting resistor, to remove metal powder generated from an accumulator and to control a switching speed by attaching a plurality of impellers on a driving shaft coupled at one end to a switching cr...
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JP02232910 |
PURPOSE: To boost the gas pressure of the main body of a transformer without changing the differential pressure of the sealed part of a rotating shaft by a method wherein insulating gas of about intermediate pressure of the main body gas...
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JP02231703 |
PURPOSE: To secure sufficient DC superimposing characteristic for the inductance of a winding under control by forming a part whose magnetic resistance is large only on a magnetic path with respect to the winding under control on a core ...
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JP02229412 |
PURPOSE: To surely detect an abnormality at an early stage and and to prevent an accident by a method wherein actual oil levels at each part are grasped by using oil-level detectors installed individually at a changeover switchgear room,...
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JP02220424 |
PURPOSE: To prevent overvoltage and increase capacitance by preparing separately a cylindrical secondary winding which, as an installation different from a primary winding, allows a conductive sheet to be wound around a core leg and draw...
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JP02216805 |
PURPOSE: To achieve operation continuation even if a vacuum switch produces a vacuum leakage by placing a fixed auxiliary contactor of auxiliary contactor at a tap selector side, placing a movable auxiliary contactor at a first vacuum sw...
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JP02213105 |
PURPOSE: To provide a system which makes it possible to monitor the overall operation of an on-load tap changer by providing a detecting means having at least one of a pressure detecting part which detects the change in pressure in a swi...
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JP02207511 |
PURPOSE: To enable automatic winding which continues from the main winding to the tap winding by providing a spacer between each winding at the outermost layer and an insulator, and forming space between each winding and winding each win...
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JP02203509 |
PURPOSE: To provide a changeover switch which can prevent scattering of metal powder and can be constructed in a small size by providing a power storing device for causing switching operation, a cylindrical impeller for feeding cooling g...
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JP02201908 |
PURPOSE: To acquire an inductance element of a simple structure which can vary inductance at a fast speed by varying an effective permeability of a magnetic circuit by an electromechanical coupling element. CONSTITUTION: A magnetic circu...
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JP02194508 |
PURPOSE: To easily adjust an inductance and to change it continuously by a method wherein two core bodies whose peripheral edge parts of cylinder end faces having concentric recessed parts toward the inside are turned relatively and are ...
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JP02178906 |
PURPOSE: To surely prevent burning and service interruption accident, etc., by providing a hooking cam which force-shifts additionally a driving frame to a specified position coacting with a driving shaft so as to make it surely perform ...
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JP02172209 |
PURPOSE: To control DC superposing characteristics freely by a method wherein the magnetic characteristics of a core is controlled by magnet fitted to the center opening of the core. CONSTITUTION: A magnet 12 is fitted to the center open...
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JP02163916 |
PURPOSE: To prevent an iron core from being enlarged due to the change in magnetic flux density during tap-change as well as enhancing the reliability by a method wherein a tap winding is connected between a series winding and a shunt wi...
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JP02154407 |
PURPOSE: To provide a sufficient strength against an electromagnetic force applied to a tap winding and improve the reliability by a method wherein one end of the tap winding is connected to the terminal of a series winding so as to have...
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JP02147867 |
PURPOSE: To prevent destruction and damage of electric and electronic apparatuses by selecting one of plural voltage terminals of a transformer by means of a jumper line block and connecting the selected voltage terminal with a single po...
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JP02132811 |
PURPOSE: To make it possible to easily conduct a test from outside by a method wherein the junction point of an excitation winding and an on-load tap changer is led out outside using two bushings, and they are earthed by connecting them ...
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JP02123715 |
PURPOSE: To prevent the shortening of the life of a vaccum valve and to provide a transformer having a highly reliable rotary sealing part by housing a switch into a switch chamber which is separated from a transformer main body includ i...
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JP02103912 |
PURPOSE: To enable efficient change-over work on site and equipment operation with low loss by separating winding for voltage adjustment from winding for phase and winding for phase adjustment from an external cable, and connecting them ...
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JP02102512 |
PURPOSE: To standardize the electromagnetic coil structure for every core type and to contrive accomplishment of highly efficient production by a method wherein metal pieces with a projection, to be used for mounting of a printed wiring ...
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JP02094610 |
PURPOSE: To widen freedom of control of the number of windings to an electromagnetic coil in a printed board by making metal pieces fixed to a plastic-made case wrapping a toroidal type iron core into small pieces up to a pitch realizabl...
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JP02086107 |
PURPOSE: To simplify the laying down of line lead wires simultaneously cutting down the whole length thereof by a method wherein a high voltage winding wound around either one out of both sides of respective phase iron core feet and prov...
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JP02083911 |
PURPOSE: To hold a gap between a distance and a movable contact maker contact by providing two pieces each of springs with three kinds of spring constant respectively while making a mounting hole of a distance elliptic in an on-load tap ...
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JP02083909 |
PURPOSE: To pursue the cause of trouble and to take proper action by detecting the operating condition of each part of the tap changing controller of a transformer, and comparing it with the control conditions at normality so as to judge...
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JP02083910 |
PURPOSE: To surely find the abnormality of the whole device by comparing, for operation, the total change-over time of the change-over switch of a transformer and the total change-over time of the whole device with set values. CONSTITUTI...
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JP02080978 |
PURPOSE: To reduce the cost of construction to a large extent by interposing resistors for detecting a tap position between the tap terminals operated in parallel and detecting the difference between the voltage values by the respective ...
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