Abstract: Provided are: a method for producing an electrode material for a vacuum circuit breaker, whereby withstand voltage, high current interruption performance and capacitor switching performance can be improved; an electrode material for a vacuum circuit breaker; and an electrode for a vacuum circuit breaker. The electrode material for a vacuum circuit breaker is produced by a method comprising a mixing step, a press sintering step, and a Cu infiltration step. In the mixing step, an Mo powder having a particle diameter of 0.8 to 6 ?m is homogeneously mixed with a thermite Cr powder having a particle diameter of 40 to 300 gm in such a manner as giving a mixing ratio (Mo:Cr) of 1:1 to 9:1 and satisfying the weight relation Mo?Cr. In the press sintering step, the resultant mixture is pressure molded under a press pressure of 1 to 4 t/cm2 to give a molded article. Next, said molded article is sintered by maintaining the same at a temperature of 1100 to 1200° C.

Abstract: Atomized Cu—Cr alloy powder, 20 to 30 percent by weight of Thermite Cr powder and 5 percent by weight of electrolytic Cu powder are mixed together and undergo solid phase sintering treatment to form an electrode material for vacuum circuit breakers. The gross content of Cr of the electrode material is 30 to 50 percent by weight. In manufacturing the electrode material for vacuum circuit breakers, such powders are mixed together and then undergo compression molding to be formed into a compressed compact. The compressed compact is performed solid phase sintering at a temperature lower than the melting point of Cu in a non-oxidizing atmosphere to prepare a solid phase sintered body.

Abstract: Vacuum circuit breakers are to gain an extended lifetime by reducing contact face damage of moving and fixed electrodes with improved voltage withstand performance therebetween and enhanced interruption performance. Vacuum circuit breaker of the present invention has bulb 10 having: insulative vacuum tube 11; and fixed electrode 12 on end of current-carrying conductor 13 and moving electrode 15 on end of another current-carrying conductor 16 arranged in insulative vacuum tube 11 with their electrode contact faces opposed each other. Operation system for manipulating current-carrying conductor 16 of moving electrode 15 is equipped with compression-spring 20 and auxiliary compression-spring 21 that increases initial opening speed of moving electrode 15. Auxiliary compression-spring 21 ceases energizing in the middle of a circuit breaking movement of moving electrode 15 and begins storing spring energy in the middle of a circuit closing movement of the same.

Abstract: A driving mechanism (100) includes a first rotor (10) that rotates around a first shaft L1 and a second rotor (20) that rotates around a second shaft L2 that is provided in parallel with the first shaft L1. The first rotor (10) includes a guide (13) that extends in a circular arc around the first shaft L1 and a drive pin (14) that is provided outside the guide (13) relative to the first shaft L1. The second rotor (20) includes a first member (40) with a plurality of leads (41) that extend in the radial direction from the second shaft L2 and a second member (50) that is provided between the first rotor (10) and the first member (40), that moves together with the first member (40), and that includes a plurality of first surfaces (51) with substantially the same curvature as a circular arc-shaped outer surface (13b) of the guide (13).

Abstract: An apparatus including a recording switch for recording a temperature of an object; a judging unit that measures the temperature of the object using a sensor at intervals and judges whether a difference in temperatures measured at the intervals is within a range of a pre-set value; a first acquisition unit that records and/or outputs, when a switch-on of the recording switch is detected and the difference in temperatures is within the range of the pre-set value, information including a first temperature measured using the sensor and has become valid by the switch-on of the recording switch; and a second acquisition unit that records and/or outputs, when the switch-on is detected and the difference in temperatures is outside the range information including a second temperature measured using the sensor and becomes valid when the difference in temperatures falls within the range after the switch-on is detected.

Abstract: There is provided a multipurpose semiconductor integrated circuit device that can connect a variety of appliances to a network at low cost. The multipurpose semiconductor integrated circuit device includes: a plurality of types of input/output interfaces; a memory including a file storage region for storing a script file where processes relating to data inputted and/or outputted though the plurality of types of input/output interfaces are defined using a script language; an interpreter capable of executing the script files; and a file management system that admits accessing the file storage region of the memory thought at least one of the plurality of types of input/output interfaces. By defining user logic relating to input/output data using a script file, it is possible to clearly distinguish between firmware and user logic and user logic can be installed easily.

Abstract: A driving mechanism (100) includes a first rotor (10) that rotates around a first shaft L1 and a second rotor (20) that rotates around a second shaft L2 that is provided in parallel with the first shaft L1. The first rotor (10) includes a guide (13) that extends in a circular arc around the first shaft L1 and a drive pin (14) that is provided outside the guide (13) relative to the first shaft L1. The second rotor (20) includes a first member (40) with a plurality of leads (41) that extend in the radial direction from the second shaft L2 and a second member (50) that is provided between the first rotor (10) and the first member (40), that moves together with the first member (40), and that includes a plurality of first surfaces (51) with substantially the same curvature as a circular arc-shaped outer surface (13b) of the guide (13).

Abstract: An optical sensor configuration contains an optical current sensor and/or an optical voltage sensor. The sensor configuration further contains a first and a second hollow member, preferably ring shaped profiles, which are together disposed to form a hollow section. The sensor configuration further includes an optical fiber of the current sensor disposed in an annular groove, the groove being disposed at the boundary surface between the first hollow member and the second hollow member, and/or an optical fiber of the voltage sensor is disposed in a recess of the second hollow member. The first hollow member has an annular recess into which the second hollow member is disposed whereas the first hollow member is an L-shaped or U-shaped ring with two legs and the recess is formed between the two legs.

Abstract: Multi-phase, gas insulated electrical switchgear with optical voltage and/or current sensors are described. Compensation for contributions to sensor readings from non-associated conductors is provided. A processor is connected to voltage and/or current sensors which are placed near conductor whose voltages and/or currents are to be measured. The processor can receive outputs from those sensors and compensate the outputs for contributions which are attributable to sources other than the conductors which are intended to be measured.

Abstract: A sensor provides an analog sensor output signal that is first converted by a A/D converter, followed by a digital signal processor having a digital signal output that is converted to an analog signal by way of a D/A converter so as to provide an analog information output signal indicative of a parameter quantity intended to be sensed. An analog dither signal and/or a digital dither signal is provided for modulating the A/D converter input signal and/or D/A converter input signal, respectively, separately, or in combination, to enhance dynamic range accuracy of the resultant analog information output signal representative of the quantity of the parameter intended to be sensed.

Abstract: An optical sensor configuration contains an optical current sensor and/or an optical voltage sensor. The sensor configuration further contains a first and a second hollow member, preferably ring shaped profiles, which are together disposed to form a hollow section. The sensor configuration further includes an optical fiber of the current sensor disposed in an annular groove, the groove being disposed at the boundary surface between the first hollow member and the second hollow member, and/or an optical fiber of the voltage sensor is disposed in a recess of the second hollow member. The first hollow member has an annular recess into which the second hollow member is disposed whereas the first hollow member is an L-shaped or U-shaped ring with two legs and the recess is formed between the two legs.

Abstract: Multi-phase, gas insulated electrical switchgear with optical voltage and/or current sensors are described.

Abstract: A protection relay for a power line system that employs current transformers for detecting current on a bus is provided with a fault trip scheme that includes transformer current saturation detection so as to avoid false tripping due to temporary transformer current saturation.

Abstract: In accordance with the preset invention, an optical interferometer employed as a current sensor is provided with visibility compensation and scale factor compensation. In accordance with the present invention, the interferometer is constructed so as to propagate a pair of optical beams along a defined optical path, where the optical interferometer includes a pair of optical beams that travel along at least a portion of the defined optical path such that a phase shift is induced between the pair of optical beams in response to a measureand, for example electrical current. At least one photodetector is responsive to at least a portion of the sum of the pair of optical beams and provide a beam output signal indicate thereof. From the beam output signal, a first signal is derived that is indicative of the visibility of the interferometer.

Abstract: A time division multiplexed optical voltage measuring system includes an optical voltage sensing system module including, (i) a plurality of optical sensors where each sensor is responsive to an input interrogation light wave, and (ii) one or more optical outputs affected by sensed electric field thereat. The optical voltage sensing system module includes an optical circuit arrangement having (i) an input for receiving a module specific pulsed light wave derived from a primary pulsed light wave from a remote light source, and (ii) arranged such that each of the plurality of optical sensors receives an interrogation pulsed light wave. The optical circuit arrangement of the optical voltage sensing system module further includes at least one optical wave combiner for combining like-kind of outputs from all of the plurality of optical sensors. The optical circuit is arranged such that the pulsed light waves from the outputs of different optical sensors arrive at the optical wave combiner at differing times.

Abstract: A data collection method of the present invention uses measuring terminals, each of measuring terminals can obtain measurement data from a sensor and wirelessly transmit the measurement data, and a collection terminal for receiving the measurement data from the measuring terminals, each measuring terminal having a memory that stores, as its own identification information, one of a limited number of sets of identification information whose order can be defined.

Abstract: An electric field sensing system is characterized so that a signal processor may derive an output representative of an electric field intended to be measured, particularly established by high voltage on a power line, with enhanced accuracy. Characterizing parameters may be derived from signals representative of a pair of light waves derived from a light wave exiting an optical electric field sensing element in a electric field sensing head spatially positioned in the high voltage environment.

Abstract: A measurement device of the present invention includes a measurement portion for acquiring measured data from a sensor; a memory portion for storing the measured data; a radio portion for performing radio transmission/reception of the measured data; a PC interface portion for transmitting the measured data to a host computer via the universal interface; and a control portion for controlling the measurement portion, memory portion, radio portion, and PC interface portion, the control portion has a switching function for setting a mode by selecting between a remote mode and base mode; in the remote mode, the measured data acquired by the measurement portion are stored in the memory portion and transmitted by the radio portion, and in the base mode, the measured data acquired from the radio portion are stored in the memory portion and transmitted to the host computer by the PC interface portion.

Abstract: A measuring unit capable of measuring change in physical quantity, such as a temperature, and incorporating a measuring portion for sequentially recording plural measurement data measured at a predetermined interval in a memory, and a communication portion capable of transferring the recorded plural measurement data in the memory and the period elapsed from the last data measurement to communication. In the measuring unit, only measurement data can be recorded, requiring no recording of the time information. After transferring the measurement data and the elapsed period to a measuring data management apparatus, the measuring data management apparatus is able to obtain measurement time of each measurement data. Therefore, the structure of the measuring unit can be simplified and the capacity of the memory can effectively be used to record the measurement data. Moreover, time required to transfer measurement data can be shortened.