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JPH0545401A |
PURPOSE: To enable operation of a partial discharge monitoring device to be inspected without connecting an external circuit. CONSTITUTION: A discharge monitoring circuit consists of a partial discharge current pulse detection circuit 11...
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JPH0530642A |
PURPOSE: To interrupt DC power supply for a motor driving circuit quickly upon occurrence of abnormality. CONSTITUTION: A rotation detector 20 detects rotation of a brushless motor 1. When the rotation detector 20 does not detect a rotat...
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JPH058867B2 |
A monolithic integrated circuit (IC) chip in which is formed a multi-driver power circuit, with each driver circuit including one output power transistor, is partitioned such that the power transistor of each driver circuit, formed in th...
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JPH0520999A |
PURPOSE: To provide a breaker whose inner-circuit can be prevented from being burnt out due to the malfunction or the like of an operating mechanism and whose trouble can be discriminated without difficulty. CONSTITUTION: In the case whe...
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JPH0520914A |
PURPOSE: To prevent the abnormal temperature rise of a lamp body and enhance safety. CONSTITUTION: A spotlight in the title has a lamp body 2 to house a lamp 7 and so support the direction of a projection opening 5 as to be freely adjust...
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JPH0511008A |
PURPOSE: To obtain a device for monitoring gas-insulated transforming equipment which can automatically monitor gas-insulated transforming equipment so that the manpower can be saved and can protect a gas analyzer from a harmful gas to t...
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JPH052540U |
[Purpose] In a microwave circuit composed of a waveguide, it is an object of the present invention to obtain an easily configured circuit capable of reliably detecting a microwave arc generated in the circuit. [Constitution] A temperatur...
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JPH04137439U |
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JPH04355623A |
PURPOSE: To get an ultrasonic washer which never burns the coil of an oscillator even if heat is generated in the oscillator. CONSTITUTION: Though an ultrasonic washer 1 is of such constitution that it generates ultrasonic wave from the ...
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JPH04131901U |
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JPH04347529A |
PURPOSE: To protect a worker against electric shock in live area (access area). CONSTITUTION: When a worker stretches his hand into an access area 101 for the purpose of maintenance, optical path between a projector 3 and a light receive...
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JPH04347528A |
PURPOSE: To provide a protective unit for electronic appliance wherein conducting state between electronic circuits is released based on an abnormality detection signal, switching of the electronic circuit is made without depending on el...
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JPH04344120A |
PURPOSE: To provide a heat protecting device in which an operation for mounting a component such as a detector, etc., to protect against an overheat is simplified and an area for mounting an overheat protecting detector and an entire hei...
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JPH04340320A |
PURPOSE: To protect equipment by breaking a driving power supply circuit to a part at abnormal overheating of the same part. CONSTITUTION: A part 4 is supplied with driving power through the switching circuit by a transistor 2, and refer...
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JPH04331414A |
PURPOSE: To cut off a breaker installed at the power supply side automatically based on the proper diagnosis of a cable way by installing an optical fiber distributed-type temperature sensor along a trunk line. CONSTITUTION: An optical f...
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JPH04332880A |
PURPOSE: To enable an abnormality to be detected highly accurately with a compact receiver by allowing a center frequency of a band-pass frequency characteristic of a voltage-tuning filter to be changed continuously by changing an output...
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JPH04124835U |
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JPH04124834U |
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JPH0448108Y2 |
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JPH04322120A |
PURPOSE: To enhance safety at the time of earthquake by extracting feature amount data from the output waveform of a sensor for detecting vibration and performing fuzzy inference and then opening an overcurrent circuit breaker upon decis...
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JPH04123406U |
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JPH04308416A |
PURPOSE: To provide an overheat protective device which systematically performs overheat protective operations by using electric signals. CONSTITUTION: This overheat protective device is provided with an overheat detecting element 4 whic...
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JPH0467423B2 |
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JPH04301578A |
PURPOSE: To improve noise resistance and the like in regard to a surge and the like of a power apparatus by storing a generation output of a piezoelectric unit in a storage charge element, by detecting as a light signal a change in the s...
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JPH04118581U |
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JPH04118735U |
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JPH04285465A |
PURPOSE: To prevent an abnormal state of a power source due to runaway or damage of a rectifying diode and a switching transistor of a switching power source by heat. CONSTITUTION: A diode 9 of a temperature/voltage converter is disposed...
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JPH04114735U |
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JPH04267090A |
PURPOSE: To monitor a glass temperature with high reliability by measuring the temperature of a transformer, and shutting off connection between the transformer and a voltage source, when the temperature exceeds the adjustable limiting t...
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JPH04265869A |
PURPOSE: To device whether an accident point detecting device which detects a section where a failure has occurred out of a plurality of sections which are screened by an insulation spacer functions properly or not when a short- circuiti...
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JPH04265621A |
PURPOSE: To protect a switching power device from accidents such as fuming and firing due to overcurrent. CONSTITUTION: A protective element 9 which is made by connecting a resistor and a thermal fuse in series and combining them thermal...
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JPH04259002A |
PURPOSE: To instantaneously detect a fault by generating a pair of linear signals having amplitude which depends on a valve position and adapting them as fault signals when the sum of the linear signals gets out of a prescribed range. CO...
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JPH04255416A |
PURPOSE: To realize temperature drop processing or automatic power interruption through a maintenance crew by detecting abnormal temperature rise of a device in step. CONSTITUTION: Upon temperature rise of a device, a 50°C temperature s...
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JPH04505243A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPH04255417A |
PURPOSE: To provide an overcurrent protective element having circuit protective function and abnormal state detecting function. CONSTITUTION: The overcurrent protective element 11 comprises a first element 4 connected with a circuit to b...
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JPH04255414A |
PURPOSE: To protect a load from an overcurrent by a method, wherein current detection transformers are provided, and when the present temperature of the load which is calculated from a secondary detection voltage exceeds a reference leve...
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JPH04248318A |
PURPOSE: To prevent turn ON of power after removal of housing cover by interrupting power supply upon removal of the housing cover. CONSTITUTION: A first rectifying/smoothing circuit 2 is connected in parallel with the light emitting sec...
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JPH04102480U |
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JPH04248313A |
PURPOSE: To reduce the size and to enhance the reliability and safety of a printer by detecting the inner temperature of a power supply and controlling the power supply voltage of a driver circuit by means of a control transistor. CONSTI...
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JPH04101239U |
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JPH04244732A |
PURPOSE: To prevent not only abnormal heat generation of a surge absorbing element but also thermal damage, fire, etc., of an electronic part and in the case of infiltrating the continuous overvoltage or overcurrent further to automatica...
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JPH04244726A |
PURPOSE: To stabilize the initial performance of the title detector and, at the same time, to improve the long-term stability of the detector by preventing the mixture of copper ions in an electrolyte in a gas electrode-side electrolyte ...
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JPH0454442B2 |
A portable electric hair dryer includes an electric heater and blower forming a load circuit energized from a pair of power feeder lines connected to a source of AC power. A zero phase-sequence current transformer is electrically coupled...
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JPH0498839U |
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JPH04228622A |
PURPOSE: To enable early finding of an improper draft in a drafting mechanism of a spinning machine. CONSTITUTION: This method for monitoring a draft ratio is to monitor the temperature of at least one driving motor for avoiding an impro...
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JPH0493854U |
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JPH0433630Y2 |
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JPH0433631Y2 |
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JPH0447270B2 |
A resistor device comprises a first film of resistive material deposited on a dielectric substrate and having two terminal portions for connection to an electrical circuit, and a second film of resistive material deposited on the substra...
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JPH04204270A |
PURPOSE: To measure a signal corresponding to partial discharge highly accurately by observing the detected signal of a partial-discharge detecting means at a phase where, e.g. the partial discharge associated with cause to be found is m...
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