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JP2001157357A |
To prevent the occurrence of a fire due to an electrical accident by cutting off internal electricity if a house is tilted to such a degree that it is in a dangerous condition by an earthquake or the like.The length of a signal from a ti...
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JP2001145252A |
To reduce costs by abbreviating the electrical wiring between a gas detection part including a gas sensor and a power supply circuit breaker. A gas detection part 3 including a gas sensor 1 or the like while being installed in a gas pipi...
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JP3167734B2 |
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JP2001119853A |
To provide a current limiter circuit 30, which can limit the current of an output driver transistor M11 relatively flatly extending over a wide temperature range, by using it together with a low-accuracy current limiter circuit 10. A cur...
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JP3157374B2 |
PURPOSE: To obtain a device for diagnosing remaining service life of oil-immersed transformers which can relatively easily diagnose the remaining service life of an oil-immersed transformer without performing gas analysis on the insulati...
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JP3157820B2 |
A method and system is provided for electronically simulating, indicating and controlling the temperature of liquid cooled multi-phase electric power transformers. The temperatures of transformer windings are electronically computed from...
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JP3157717B2 |
To make it possible to keep power in a cable way until a power company stops the power even when an earthquake is sensed, and prevent a fire caused at the re-transmission after power stoppage. A energization preventive device includes an...
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JP2001101960A |
To provide a PTC starter having a safety function with excellent safety which can prevent the starter from sparking, burning, or generating smoke or flame when the PTC device is broken and spring contacts do not contact with each other a...
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JP2001093398A |
To provide a safety switch mechanism for a seismoscopic short circuit device, capable of preventing unexpected operation of a short circuit by providing a safety switch allowing the short circuit in the device to remain open until it is ...
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JP2001069787A |
To maintain the energizing level of a motor as high as possible by lowering the current value supplied to an electric coil through energization instructing means when the difference between the upper limit temperature value and the detec...
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JP3143205B2 |
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JP2001057763A |
To provide a motor controller which is capable of shutting down a motor driving circuit positively when a PTC element is heated abnormally, is highly safety, and is capable of being manufactured at a low cost, without the need for formin...
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JP2001052584A |
To provide a circuit breaker combining a break part and control part, capable of certainly breaking a circuit in a short time to protect an electrical component when an abnormal signal of a vehicle is inputted. In this circuit breaker, a...
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JP2606901Y2 |
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JP2001045650A |
To surely protect three terminal switching element and a load, even if the three terminal switching element is driven by means of a drive pulse whose duty is fine. When a temperature sensor detects the temperature of not less than a pres...
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JP3132378B2 |
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JP3131501B2 |
PURPOSE: To provide a gas insulated switchgear with an excellent profitability that is provided with a simple and highly reliable preventive maintenance system. CONSTITUTION: A number of apparatus 2-5 and 8 including a circuit breaker 1 ...
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JP3131129B2 |
To realize a temperature detector, which is capable of generating signals detecting that the temperature of an integrated circuit exceeds a threshold temperature by a method, wherein the temperature detector is equipped with two MOS tran...
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JP3127767B2 |
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JP3128973B2 |
PURPOSE: To measure an abruptly varying temperature positively and to prolong the service life of relay by normally switching relays at temperature measuring points with long period whereas switching the relays with short period when the...
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JP3127768B2 |
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JP3129182B2 |
To make a decision with no delay by setting a current interruption rate based on an initial decision of load limitation depending on a temperature estimated from weather conditions and performing the second and subsequent interruption of...
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JP3129181B2 |
To control the conduction current on a line just to a maximum level within thermal limit while taking account of weather conditions by delivering a feeder interruption command when a predicted temperature of the line after a predetermine...
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JP2001025155A |
To distinguish occurrence of internal short circuit from other external short circuits by detecting the pressure value of an insulation medium, integrat ing its pressure values for each prescribed section for computation of a plurality o...
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JP3126392B2 |
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JP3126391B2 |
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JP2001014991A |
To prevent operational errors for water leak and to adopt measures at a low cost, by providing an exciting coil in a case having liquid tightness, connecting an electrode portion to each of both coil terminals of this exciting coil, and ...
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JP2001008358A |
To accelerate the speed of sensing temperature, prevent overheating and discharge accidents or the like by bringing a pair of terminals for detecting a thermoelectromotive force into contact with different type metals for constituting a ...
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JP3121570B2 |
PURPOSE:To increase safety by allowing a sensitivity current frequency characteristic of a rapid and highly sensitive leakage circuit breaker to fall below the threshold value stipulated by IEC479-2. CONSTITUTION:When a leakage current h...
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JP2000357540A |
To provide a protective circuit capable of preventing thermal influence on a casing caused by fusion of a temperature fuse without impairing miniaturization of the casing for storing the protective circuit and a secondary battery in the ...
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JP2000358323A |
To interrupt power supply after occurrence of an earthquake and when power supply is restored, by providing a sensor detecting means, a timer, a control unit, a storing means for storing signals in memory, and a deleting means for, when ...
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JP2000358324A |
To obtain an emergency electric cut-off refuse apparatus in an earthquake, capable of connecting to a ground leakage breaker existed in a stipulated height of 1.8 to 2.2 m, installing a remote control switch at a position to be operated ...
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JP3121336B2 |
An apparatus for supervising objects, such as hot plates and electrical stoves, with regard to overheating comprises at least one detector (9) for detecting conditions of overheating and a device (11) controlled by the detector for deliv...
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JP3120359B2 |
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JP2000517066A |
A method and device for managing the functioning under irradiation of an electronic component having a nominal supply voltage. During a test phase there is applied to the component an initial supply voltage less than the nominal voltage ...
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JP2000517150A |
A hybrid alternator comprising a stator (702) and a rotor (710) mounted for rotation within the stator and separated therefrom by an air gap. The rotor has a rotor core defining a plurality of magnetic poles (716) wherein adjacent ones o...
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JP2000348825A |
To shut off power supply to an electric apparatus when abnormality such as earthquake or overheat arises by installing a plug blade, an insertion opening for inserting the plug blade of the electric apparatus, a receptacle fixture for su...
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JP2000516798A |
An overcurrent protection system giving rapid response to relatively small overcurrents has a sensor element and an interruption element in series between a power source and a load. The sensor element is functionally linked to the circui...
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JP3112310B2 |
PURPOSE:To increase safety by allowing a sensitivity current frequency characteristic of a rapid and highly sensitive leakage circuit breaker to fall below the threshold value stipulated by IEC479-2. CONSTITUTION:When a leakage current h...
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JP2000324841A |
To provide a power supply being used as an alternative to the battery pack of a commonly used tool, or the like, in which the need of charging operation is eliminated by eliminating discharge during operation of a power unit and the temp...
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JP3110824B2 |
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JP2000316288A |
To provide an economical and solid protector which protects the winding of an electric motor from failure caused by a temperature rise, electrical noise, etc. A protector has power supplies with an input voltage of 120 VAC and an input v...
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JP3107831B2 |
A protecting method and apparatus for a regenerative resistor in which a regenerative resistor is satisfactorily protected from a thermal breakage caused by an over-regeneration by combining a protection of the regenerative resistor by a...
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JP2000312435A |
To prevent explosion of a rechargeable battery under a state through comparatively simple constitution, in which an electrolyte is not ejected, at a low cost. This rechargeable battery using the pressure breaking protective device has an...
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JP2000301812A |
To provide a control apparatus forming images such as a facsimile apparatus, a copying machine, a printer or the like in which elements necessary for constituting a protecting circuit for protecting a plurality of electrical parts of var...
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JP2000299426A |
To miniaturize an electronic unit by improving mounting flexibility of a power supply control system. By mounting a switching device 110a with current vibration type interrupt function that is a hard complete type with one chip without r...
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JP2000299928A |
To make a shunt resistor unneeded and to respond at high speed to an abnormal current in the case of an imperfect layer short-circuit, by constituting a full-bridge a DC-DC converter with the second main electrodes of first and second se...
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JP2000299922A |
To improve reliability by omission of a charge pump, by supplying power from a power source to a first load, and by controlling power supply to a second load by control signals from an auxiliary power supply of a different power supply v...
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JP2000294114A |
To discriminate service interruption after an earthquake from usual service interruption, and prevent operation in usual service interruption by connecting a memory whose memory is not erased even if power is not supplied to a sensor to ...
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JP2000295760A |
To identify overheat of an insulating material from other possible causes by measuring the infrared absorption spectrum of components included in a cooling medium, in an abnormal overheat diagnosis for power apparatus inside having an in...
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