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JP2002237423 |
To provide a transformer which is equipped with separate windings that have a high inter-winding withstand voltage and a low inter-winding capacitance so as to have a very low and controlled inductance leakage and a high coupling coeffic...
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JP2002216596 |
To provide a vacuum valve changeover switch where the device as a whole can be greatly downsized by downsizing a resistor by shortening the difference in current flow time.In the vacuum valve changeover switch where a vacuum valve operat...
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JP2002209314 |
To provide a power-receiving and transforming device which enables a test of a transformer single body safely without removing an incoming cable in the case of a periodic test of a transformer or installing a grounding apparatus on the t...
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JP2002204575 |
To provide a voltage regulator which can maintain a voltage regulating function regardless of a system changeover on a distribution line and the installation state of a distributed power supply.This voltage regulator is a tap-changing vo...
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JP2002198230 |
To provide a changeover-confirming mechanism and a protective system, with which a small-sized safe on-load tap changer provided with an additional fault-preventing mechanism that can prevent the occurrence of serious faults, even if the...
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JP2002184629 |
To reduce installation space.A transformer tank 1 is divided into three chambers 12 to 14, and the first divided chamber 12 is provided with a space, including the bottom of the transformer tank to the inner wall surface of a transformer...
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JP2002175749 |
To provide a on-load tap switch having a small and simple constitution and enhanced reliability.The tap switch to work for a transformer having a plurality of taps from the windings is composed of a switching apparatus to change over one...
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JP2002158124 |
To provide an inductance component whose characteristics do not deteriorate by reducing the limitation in the shape of a permanent magnet to be installed, and inhibiting the generation of heat of the permanent magnet by magnetic flux due...
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JP3311391 |
PURPOSE: To control the spatial distribution of a leakage magnetic flux related to a high-frequency switching power converter, by providing a conductive medium near a magnetic medium and a coil, so that a border which confines such magne...
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JP2002134338 |
To provide a flexible power facility that can cope with diversification of loads, such as system voltage fluctuations, etc., by realizing electromagnetic equipment which changes reactance over a wide range, without using taps making chan...
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JP2002134337 |
To provide a small-sized inexpensive roller contact device for tap selector and a tap selector.This roller contact device for tap selector is constituted with set of an upper roller and a lower roller being held on a frame, and a ring-li...
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JP2002129230 |
To easily change connection between a common tap and an individual tap.The matched transformer interposed between an electric source (not shown in figure) and a high frequency heating coil (not shown in figure), supplied with power by th...
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JP2002124421 |
In an induction device, in which a cable is used for winding and which is advantageous in an insulating structure and excellent in environment, firstly, to realize the induction device having a small impedance fluctuation in adjusting vo...
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JP2002124422 |
To provide a loaded tap changer which has a small and simple constitution and an excellent breaking performance and high reliability.A cam 27 is disposed at the center of a driving shaft 126 and four driving flanges 8a to 8d are connecte...
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JP2002124420 |
To provide a tap selector that can be made compact while the selector maintains prescribed dielectric strength.Lead terminal attaching sections 22a respectively provided at the outer end sections of fixed contacts T1a-T10a are bent perpe...
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JP2002110436 |
To make a main change-over switch and an auxiliary change-over switch able to be driven by means of a common driving shaft.The driving mechanism of the auxiliary change-over switch 6 is constituted of a toggle mechanism which is provided...
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JP2002093641 |
To provide a highly reliable voltage adjustable voltage transformer, which does not need a reactor and a resistance element and in which noise will not appear, when voltage is switched.In the multiple winding wire transformer, at least t...
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JP3292430 |
PURPOSE: To exactly grasp the operation state of a high-voltage automatic voltage adjuster by collecting the data for grasping the operation state of the high-voltage automatic voltage adjuster installed on a high-voltage distribution li...
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JP2002093640 |
To make an inspection easily, even if the conditions of a work site is poor.In a transformer for changing a tap under load, in which a switchgear 12 such as a switchgear for switching a tap under load or a switchgear for selecting a tap,...
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JP2002083724 |
To provide a magnetic element which can exhibit magnetic bias effect over an entire drum-shaped core piece, minimize magnetic saturation, and be made inexpensive and small in size and weight.The magnetic element includes a magnetic core,...
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JP2002083722 |
To provide an inductor and a transformer where a permanent magnet for applying a magnetic bias is arranged in the air gap of a magnetic core, and which can reduce influences of the magnetic field of a excitation coil on the permanent mag...
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JP3289268 |
PURPOSE: To miniaturize a tap change-over switch of a neutral point grounded reactor having dual rated current specified reactor and a resistor to reduce the size of the neutral point grounded reactor. CONSTITUTION: The neutral point gro...
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JP2002075750 |
To provide a transformer, which can easily make leakage inductances variable and a power unit, which can effectively utilize the capacity of the transformer.The transformer 10 is provided with bobbins 12 and a core 14. The center shaft o...
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JP3287957 |
PURPOSE: To provide an AC arc welding machine capable of appropriately changing the gap according to the position of a movable core with a simple structure at a low cost. CONSTITUTION: A transformer having a fixed core 1, primary and sec...
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JP3285977 |
PURPOSE: To provide an energy storage apparatus of a on-load tap changer having an excellent transmission efficiency. CONSTITUTION: The loading points of an eccentric cam 2 and an energy storage spring 11a are matched, a winding case 5 i...
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JP3283783 |
To provide a magnetic flux control type variable transformer for controlling voltage at high speed without taps for voltage adjustment of a transformer. A variable transformer have a first magnetic circuit and a second magnetic circuit, ...
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JP2002050267 |
To provide the a vacuum valve switching mechanism which is reliable in operation by shortening the distance between the contact point of a switching boss and a driving boss and the central line in the axial direction of the movable conta...
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JP2002050524 |
To provide an electromagnetic device which is hardly influenced by a load current flowing in a main winding wire, a magnetic circuit structure and a winding structure of winding wires are simple, and higher harmonic can be reduced to var...
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JP3275332 |
PURPOSE: To monitor the voltage adjustment operation easily by a method wherein the detected data of current and the detected data of voltage are calculated backward with the ratio of current transformation and the ratio of voltage trans...
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JP2002034146 |
To estimate the allowable time in operating and the degree of deterioration of a transformer, for an on-load tap changer, and a bushing.The transformer load monitor controls the operating conditions for a cooler 2 connected with a system...
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JP2002023864 |
To provide an on-load tap changer(LTC) controller of a three coil transformer capable of automatically controlling the voltage of a bus to a set voltage when buses connected to the secondary side of a three-coil transformer are both oper...
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JP3268975 |
To provide a power saving apparatus having a transformer which is never be open and hence does not break a contactless switch even at a low load state with a current below the min. load current which will not perfectly turn on this switc...
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JP2002008838 |
To improve a temperature uniformity in the width direction of strip.The electromagnetic induction heating device for metal strip 4 moved in a specific direction has at least one electric coil disposed in opposed to at least one surface a...
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JP2001358024 |
To obtain a gas-insulated stationary induction apparatus which is simplified in structure and reduced in size as a whole and, accordingly, can significantly reduce the construction cost even when the apparatus is adopted to an undergroun...
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JP2001338816 |
To lead out a tap terminal for a stationary induction apparatus without depending upon brazing while improving the degree of freedom of the number of the turns of a tap led out.A winding 1 for the stationary induction apparatus is consti...
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JP2001326130 |
To provide a single-phase power detector which automatically detect the single-phase power of a three-phase motor for driving tap, which drives the on-load tap changer of an on-load tap changing device from a desired interphase, correspo...
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JP2001284146 |
To provide a gas-sealed oil-immersed transformer, which is provided with an on-load tap changer and can prevent violent explosion of the oil tank of the tap changer and the extreme drop in the surface level of insulating oil in the oil t...
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JP2001284145 |
To provide a tap changer, for which the attaching work and replacing work of a moving contact of an outer shaft can be performed easily, in a short working time. A moving contact (second moving contact 4) of an outer shaft 3 is attached ...
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JP2001267149 |
To provide a tap changing device which can shorten the assembling time of the device itself and a transformer and can stably obtain a driving force even when many or few errors occur in the attaching positions of an operating mechanism, ...
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JP2001267150 |
To prevent the occurrence of a deviation between the tap position of a control mechanism and the actual tap position of an on-load tape changer.In a motor-driven operating device 60, a separate automatic-reset torque limiter mechanism (t...
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JP3230647 |
PURPOSE: To provide a DC reactor with magnetic bias being employed in an inverter circuit in which the permanent magnet is not demagnetized and saturation of flux in the core is retarded. CONSTITUTION: The DC reactor comprises a core str...
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JP2001230132 |
To provide a stabilized voltage supply system for a game machine, which can respond easily at low cost to a the fluctuation of the voltage supplied to the game machines at a brace arranged with a plurality of the game machines.Game machi...
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JP2001223126 |
To provide a motor controller which is capable of improving a motor is performance by obtaining current detection characteristics optimal for motor drive conditions by a single current detector.A flux density inside a core 11 is proporti...
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JP2001217130 |
To make equipment smaller in size and reduction in cost of the equipment by stabilizing the contact surface pressure of a change-over contact with fixed electrodes and to provide an on-load tap changer having its increased reliability.A ...
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JP2001189220 |
To provide transformer equipment, where reactance of a reactor can be easily switched and economical performance and reliability can be improved, by inserting and connecting the reactor with a series exciting circuit of a transformer for...
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JP3206692 |
PURPOSE: To improve reliability of an apparatus by duplicating the tap runaway monitoring function. CONSTITUTION: A voltage monitor circuit outputs a voltage zero under the condition that a motor is driven when a normal rotation switch 3...
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JP2001167944 |
To provide a highly reliable series type voltage stabilizing device, which can continuously make voltage adjustment, regardless of the state, such as the current, power factor, etc., of a load and is small in loss and a voltage stabilizi...
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JP3202200 |
To provide a choke coil with no possibility of damages to or drop of a terminal, for simplifying a terminal mounting constitution, and for simplifying the whole assembly work. This chock coil is provided with a ring core 1, having a roun...
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JP2001145264 |
To provide the central control device of a voltage-adjusting device that can appropriately switch the tap of the voltage-adjusting device, stably control the voltage of a power distribution line, and extend the life of the voltage-adjust...
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JP3189542 |
PURPOSE: To provide a monitor for an on-load tap changing operation, processing of which is simplified and by which judgment having high accuracy is possible. CONSTITUTION: Each specific data corresponding to a specific data to be monito...
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