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JP3272350B2 |
PURPOSE:To make it possible to confirm the sequence of three phases and a single phase and the connection between the different phases by providing high-voltage detecting parts at the ground reference on the power-supply side and the loa...
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JP2002098726A |
To provide an earthing detection device capable of drawing user's attention, preventing an electric shock accident or the like, and improving safety, by monitoring the connection state between the armoring part of an object instrument an...
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JP2002095159A |
To provide a protective circuit for protecting electronic equipment from a state in which the poles of a battery are reverse connected.Between the ground terminal TG of the electronic equipment 3 to which the negative pole of the battery...
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JP2002089419A |
To provide a start control device for an internal combustion engine starter having functionality such as smooth advance engagement using an electronic starter control circuit and avoiding the use of an expensive smart power MOSFET to a h...
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JP3084420U |
[Task] Provided is a structure of an automobile battery emergency starter that can be used safely and conveniently. The positive and negative voltage detection circuits 55 and 56 investigate the correctness of the polarity of the automob...
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JP2002064933A |
To provide a protective circuit for an electronic equipment which prevents a bad influence from being exerted on the inside of a body by a reverse current which flows when reverse connection is made, with simple construction without bein...
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JP3259611B2 |
To simplify a connecting means and prevent a short-circuiting fault when connecting a DC power unit to a load equipment. This system supplies the DC output of a DC power unit 1 to a load equipment consisting of a storage battery 8 and a ...
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JP2002034167A |
To increase efficiency and reliability of a power circuit.A bridge construction using two sets of relay contacts for supplying a DC power voltage of a specified polarity to a load is formed in the power circuit. In a transition duration ...
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JP3250169B2 |
PURPOSE: To provide a switch which has a simple structure and a high dielectric strength by driving the switch so that the switch may be conducted when a second switching element, namely, a bipolar transistor is operated in the opposite ...
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JP3251803B2 |
PURPOSE: To prevent the deterioration of a circuit by preventing the repetition of turning on/off of switches on a power supply under an overcurrent state. CONSTITUTION: This is an overcurrent protection circuit which can interrupt an ou...
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JP2002010485A |
To solve the problem that conventionally in a power supply, having an auxiliary power supply to supply power to the load and a connection error preventing device, error preventing device has to be replaced each time to avoid connection e...
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JP2001349853A |
To provide a portable X-ray fluorescence analyzer which is driven by a DC power source, for which the power source is readily supplied.A power source input part of this portable X-ray fluorescence analyzer, driven by the DC power source,...
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JP2001352670A |
To provide a connection apparatus which can be manufactured at low cost and by which a loss is not generated in a power supply, so that the apparatus itself or a connected apparatus will not break down, even if power supply is supplied a...
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JP2001344024A |
To prevent any over-voltage from being applied to equipment such as audio equipment by mistake.This power source device is provided with an input voltage detecting means 23 for detecting an AC input voltage, and for outputting a detectio...
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JP2001525158A |
The invention relates to a circuit for protecting consumers from damage caused by polarity reversal in an electrical system, comprising a limiter and a tripping device, wherein the system voltage supply is limited when polarity is revers...
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JP3226002B2 |
PURPOSE: To provide a reverse-current blocking circuit which is less in voltage drop and power loss when the circuit operates normally. CONSTITUTION: A pair of power terminals 2 and 3 is provided to connect a DC power source 1 composed o...
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JP3222886B2 |
A process control instrument receives a DC current from a two wire loop and has overcurrent protection and reverse current protection circuits which pass a portion of the DC current as a device current to a process controlling device. Th...
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JP3220427B2 |
To constitute a circuit performing reverse battery protection, current detection and temperature detection for a power supply circuit inexpensively by connecting a power semiconductor device in series with the forward current path in a p...
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JP3219965B2 |
PURPOSE: To protect a machine against breakdown due to short circuit of a line connecting the machine body and an auxiliary machine. CONSTITUTION: A short circuit detection Zener diode Zd has a Zener voltage lower than that of a short ci...
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JP2001268784A |
To provide an inverse connection preventing circuit of a power source wherein it is not necessary to increase the size, the cost is not increased and efficiency is not decreased when consumption current in a load is increased.This protec...
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JP2001245476A |
To provide a power source device capable of outputting voltage proper to an electronic apparatus without temporarily supplying improper voltage to the electronic apparatus.The power source device is provided with a power source circuit 3...
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JP2001224135A |
To surely cut off an inverse current, even on the upstream-side control system with reference to a load.The load 360, one end of which is grounded, is connected to a power-supply terminal 300 via a terminal 302 in series with a power MOS...
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JP2001217696A |
To detect an overcurrent-flowing to a circuit, at a low cost wing simple circuit constitution.A differential amplifying circuit 76 for an overcurrent detecting circuit 7 operates by being supplied with a current from a power source VCC, ...
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JP3191750B2 |
To prevent a power protective breaker from actuating and shutting off a power line by preventing an operation from resuming simultaneously upon resetting a power supply and an excessive current from flowing to the power supply line when ...
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JP2001190024A |
To provide a rectifying circuit device for one or a plurality of AC voltages which can surely protect the connection under the erroneous polarity. A controllable rectifier element is at least one thyristor. The gate terminal of the thyri...
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JP2001508639A |
A protecting device has a disconnecting contact (13) connected to the load current line (2) and actuated by an electromagnetic system (9). A shunt circuit leads from the side of the disconnecting contact (13) opposite to the battery to a...
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JP2001157356A |
To provide a control circuit detecting a short circuit or an overcurrent condition and, in response to it, cutting off output current from a system power supply and a method thereof.This control circuit 10, with an output transistor Q1 c...
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JP3165381B2 |
To prevent a magnet from being burnt or being broken down by interrupting the current to the magnet when energization command controlling signals for driving the magnet are outputted exceeding a fixed time. A magnet protective device is ...
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JP2001506117A |
An electromechanical switching device (10) ensures automatic selected polarity interconnection between terminals of two power sources (14, 12). A double pole double throw (DPDT) switch (34) has three pairs of contacts. A first pair of le...
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JP2001112167A |
To provide a polarity exchange system which keeps the stability of the circuit by deciding whether the load is connected. When a power source and load are in parallel and they are of the same polarity, a straight polarity switch MSF elec...
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JP2001083453A |
To provide a driving circuit provided with a protecting function for preventing a semiconductor optical scanning device from being broken caused by the abnormality of a driving signal waveform. A sampling pulse (b) is generated from a sa...
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JP2001069674A |
To work a negative-polarity input-voltage preventive circuit, so as to obstruct the application of inverse voltage to the input to a power circuit by detecting inverse voltage, when negative-polarity voltage is applied, and to supply pow...
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JP3141807B2 |
To disconnect a ground fault section of a distribution line and to recover the sound section quickly by making a decision that its own section is faulty when the absolute value of phase difference of overcurrent generating phase between ...
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JP3141806B2 |
To disconnect the faulty section of a grounded loop system distribution line automatically by making a decision that its own section is faulty when the absolute value of phase difference of overcurrent generating phase between its own se...
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JP2001045658A |
To prevent a system from being broken by including a pull-up control circuit pulling up a female contact, a printed circuit board insertion detecting circuit generating a control signal, a power supply control circuit cutting off connect...
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JP3134169B2 |
PURPOSE: To improve the accuracy in detection of the abnormal condition of a pulse by making out the same condition as leak in a circuit, and breaking the power supply to equipment in the case that the power supplied to the load operated...
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JP3117604B2 |
PURPOSE: To obtain an electric apparatus for driving a control mechanism according to a control system power supply and an actuator mechanism according to a driver system power supply in which ah appropriate countermeasure can be taken a...
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JP2606604Y2 |
A protective circuit unit includes an analog switch connected to a DC power line which is connected to the power source circuit of said electronic device and a main constant voltage diode connected in parallel to the DC power line, where...
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JP2000308254A |
To obtain a small-size grounding detection circuit that can stably detect grounding conditions. A transformer 5, where a primary winding is connected between a voltage dividing point formed of a couple of voltage dividers 2a, 2b connecte...
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JP3098983B2 |
To provide a safety ground detector which automatically detect the electric conduction state of safety ground of a part of equipment. A test relay circuit 11 judging whether grounding connection is in the open state is installed. When gr...
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JP2000277213A |
To enable electric power to be supplied only when a power source adapter is properly connected to a device. This power source adapter connecting detecting system for detecting a suitable connection of a power source adapter to a device c...
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JP2000270470A |
To increase safety by connecting a conductor plate for making connection to a pin for grounding to a grounding wire extension conductor, and by providing a detection part for detecting whether a detection wire is connected to the groundi...
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JP3092474B2 |
Re-powering an electrical equipment after recovery of service interruption is prevented if the power switch of the electrical equipment stays in ON position. During a transit period of time just after recovery of service interruption, th...
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JP2000259259A |
To obtain a switching system that abnormal heat of a heater is prevented especially at an early stage of impression with high reliability and it is used at both power supply voltage of 100 V and 200 V by connecting first and second heate...
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JP3087705B2 |
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JP3076157B2 |
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JP2000201433A |
To prevent the occurrence of input current surge and the large transition of current and voltage. Current is controlled by a relay 48, a switching assembly 67 is connected to a power distributing device 40 to control the relay 48, and a ...
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JP2000184598A |
To provide an electric apparatus assuring higher safety operation which can automatically turn OFF the power supply circuit when the power failure recovers, so that the operation can be started again after the safety is assured even when...
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JP2000152493A |
To prevent the malfunction of a DC load by suppressing the difference in the voltage supplying time to the load by providing an AC voltage monitoring circuit which sends turning-on signals to all switching elements, after confirming that...
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JP2000111599A |
To provide a ground monitor of electrostatic ground system.A detection circuit is provided, which is provided with a polarity test circuit 10, a step-down rectifying circuit 20, a ground test circuit 30 and an alarm device 40. Commercial...
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