SU1628105A1 - Device for control of status of fuse - Google Patents

Abstract

The invention relates to electrical engineering and can be used to indicate the presence of a voltage and the state of a group of fuses connected to a common source of constant or alternating voltage. The aim of the invention is to expand the field of application of the device. The purpose of the invention is achieved by the introduction of the reference element 11 and the two-color light-emitting element of the display 12. When the fuse 3 is burned, junction 13 emits red pulses of light, indicating a defective fuse. In this case, the voltage drop on elements 13.1 and 6 turns out to be less than the voltage unlocked from elements 14 and 11, therefore the support element 11 is closed and the transition 14 is de-energized. 1 hp f-ly, 1 ill.

Description

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The invention relates to electrical engineering and can be used to indicate the presence of voltage and indicate the status of a group of fuses connected to a common source of constant or alternating voltage.

The purpose of the invention is to expand the field of application of the device by providing an indication of the state of the fuses and the presence of a source voltage of both constant and alternating current.

The drawing shows a diagram of a device for monitoring the status of fuses.

The device contains an IPI 1 element, each of three inputs of which is connected to the midpoint 2 of one of three circuits, consisting of fuses 3-5 and loads 6-8 and connected to a common source 9, and a resistor 10, the first output of which connected to the first terminals of the fuses 3-5. The first terminal of the support element 1 1 is connected to the common connection point of the source 9 and the loads 6-8. The two-color light-emitting element 12 of the indication is made of two light-emitting junctions 13 and 14, connected in opposite directions, the common point of which is connected to the second terminal of the resistor 1C. The free output of the first light-emitting junction 13 is connected to the output of the element OR 1 and the free output of the second light-emitting transition 14 is connected to the common connection point of the source 9 and loads 6-8 through the supporting element 11.

The device works as follows.

With operable fuses 3,4 and 5, under the influence of the voltage of source 9, currents pass through the indicated fuses and loads 6-8. If the source 9 is an alternating voltage, then a negative current passes through the resistor 10, the light-emitting transition 14 and the supporting element 11, due to which the light-emitting transition 14 emits green light pulses, perceived by the operator as a constant light, indicating the presence of voltage and serviceability of all fuses, in the positive half period

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the voltage of the source 9, the passage of current through the light-emitting junctions 13 and 14 is excluded due to the high reverse resistance of the element 11.

When any fuse blows, for example, 3, during the negative half-voltage period, the current passes through the circuit: resistor 1C, light-emitting junction 13; element LED OR 1; load 6, due to which the transition 13 emits red pulses of light, perceived by the operator as a constant luminescence, indicating a fault in the fuse. In this case, the voltage drop on elements 13.1 and 6 is less than the voltage from the shranded circuit of elements 14 and 11, therefore, the SUPPORT element 1 1 is closed and the transition 14 is de-energized. Thus, the two-color light-emitting than 12 indications with intact fuse protection and voltage presence is green CHPT, and with a faulty fuse is red.

If the source 9 forms a constant voltage, the device operates similarly to that considered, if the voltage is applied to the fuses 3,4, b in negative polarity, with a positive polarity, the polarity of switching on the diodes of the SLI 1 light emitting element transitions 1 3, 1- and support element 11 is reversed.

As the supporting element 11, resistors, diodes, a series circuit of a diode and a Zener diode can be used, and with a constant voltage source 9 - a resistor

A set of discrete cyodes can be used as the OR 1 element, and integrated circuits at low voltages x.

In those cases when, when any fuse is burned, it is necessary, besides the visual indication, to disconnect the voltage from all loads (instead of or in addition to the supporting element 11) switch on the transistor transistor or the base-emitter junction of the switching transistor.

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Thus, in comparison with the prototype, the proposed device provides control of the presence of voltage and the state of a group of fuses connected to a common source of alternating current or direct current.

Claims (2)

Invention Formula one . A device for monitoring the condition of the fuses, containing an OR element, each of the n inputs of which has a terminal for connecting the first terminals of the corresponding fuses and loads to the connection point, a resistor whose first terminal has a terminal for connecting the connection points of the second fuses and the first terminal output voltage source, characterized in that, in order to expand the field 0 - 0 056 application, an additional element and a two-color light-emitting display element are added to it, the first output of which is connected to the second output of the resistor, the second output is connected to the output of the OR element, and the third output is connected to the first output of the support element, the second output of which has a terminal connecting the second terminals of the loads and the second terminal of the voltage source. 2. The device according to claim 1, characterized in that the two-color light-emitting display element consists of two light-emitting junctions, connected in series with each other, the common junction point of which is the first terminal of the element, and the second terminals of the first and second transitions are respectively the second and third terminals of the element .