SU570934A1 - Device for monitoring fuse bliw-out - Google Patents

Description

one

This invention relates to devices for controlling fuse blown.

The widespread use in modern switching systems of various semiconductor elements (integrated circuits, MOS transistors, opto-electronic and storage devices) required an expansion of the range of supply voltages. At the same time, timely monitoring of the power supply to the most important functional units of switching systems (subscriber sets, channel amplifiers, etc.) is important.

With a large number of fuses, grouped according to their functional purpose, the problem arises of constructing simple, technologically advanced and highly reliable devices for controlling fuse blown. In addition, it is required to quickly and clearly identify the blown fuse in order to replace it and to determine the cause of the burnout.

Arrangements are known for monitoring fuse failure in which the control of fuse failure is provided by an individual state sensor made on two ferrite elements (e.g., ferrod) with four windings on each 1. This requires a common oscillator of clock exciters

pulses and individual receivers signal burnout.

Known devices have low manufacturability due to the need to wind on

each ferrite element of the four windings; in addition, the design of the device requires a clock generator and separate receivers of signals for the blown individual fuses. In this device

There is no information about the blown fuse, which makes it difficult to find and replace it.

The closest technical solution to the invention is a device for monitoring fuse blowouts, containing a fixing unit and sensors of fuses 2 connected to it. However, this device does not provide possible. to get visual control of which

exactly fuse blown.

Claims (2)

The aim of the invention is to provide a visual control of the fuse of each fuse. To achieve this goal, each sensor of the state of the fuse is made in the form of a diode connected to the cathode fuse, to the anode of which the display element and resistor are connected, and a capacitor to the other plate of which is connected to the anode of the isolating diode and another resistor, the ends of said resistors being grounded, and the cathodes of the dissociating diodes are combined and connected to the block of fixation of the burnout and irradiators. The drawing shows a schematic diagram of the proposed device. The proposed device consists of a fuse 1, connected between the power supply and the load, a state sensor containing an indication element, for example, an LED 2, a shunt diode 3, a mode resistor 4, a differentiating chain from a capacitor 5 and a resistor 6, and a decoupling diode 7, and block 8 fixing fuse blown. A shunt diode 3, connected by a cathode to a fuse, and an anode to a divider consisting of an indication element (LED) and a resistor 4, is used to bypass the indication element in the normal state when the fuse is in good condition. The display element provides a light signaling the blown fuse. Resistor 4 is usually high-resistance and provides the required amount of current through the display element. The capacitor 5, connected by one plate to the fuse 1, and the resistor 6 are the elements of the differentiating chain, forming a signal-pulse when the fuse blows. A capacitor diode 7 is connected to the other plate of the capacitor 5 and the resistor 6, which transmits a positive pulse generated by the differentiating chain at the time of the fuse blown. Since each fuse has an individual fuse state sensor, the outputs of the entire group of fuse state sensors are combined using decoupling diodes 7 and connected to the input of fuse blocking unit 8. One of the requirements for the proposed device is to provide an alarm when one, two or several fuses blow both simultaneously and sequentially. The proposed device works as follows. In the state when the fuse 1 is operational, the capacitor 5 is charged to the value of the supply voltage 7p, and a current flows through the diode 3, creating a voltage drop across the diode 3. Thus, to the display element, on the one hand, a supply voltage is applied, and on the other, the same voltage minus the voltage drop across diode 3, which is almost 0.5-0.7 V. Therefore, the display element turns out to be a detective diode 3 ( equal potentials), almost no current flows through it and it does not work. In the case when the fuse 1 blows, the bypass "minus" is removed from the display element (the anode of the LED 2), and through it the resistor 4 also flows the display element actuation, i.e., a light signaling the individual blown fuse occurs. At the same time, the capacitor 5 is discharged, as a result of which a positive impulse goes through diode 7 to the common group block 8 for fuse blown fixation. If, after one fuse blows, another fuse blows, a common positive control impulse is sent to the common fixing unit 8, and the specific blown fuse is determined using the display element. In the case of simultaneous blown-off of several fuses at the input of the block 8 of the fuse blow-out fixation, a common summed positive pulse appears, ensuring a reliable start-up of the specified block. Claims device for monitoring fuse blowout, containing a fixing unit and fuse condition sensors connected to it, characterized in that, in order to provide a visible fuse, the fuse condition is ideally connected to the fuse with a cathode diode, To the anode of which an indication element and a resistor are connected, and a capacitor, to the ankle lining of which are connected an anode of an exciter diode and another resistor, the ends of the mentioned resis The tori are grounded, and the cathodes of the spreading diodes are integrated and connected to the fuse holder fixing unit. Sources of information taken into account during the examination 1. USSR author's certificate No. 431575, l. NOS 85/30, 1972. 2. The patent of France No. 2128425, cl. H 01 H 5/00, 1972.