SU1018058A1 - Device for detecting short-time breaks in electrical circuits - Google Patents

Description

the third and fourth resistors, the switch and the second transistor connected by a collector through the second resistor to the second output of the block, directly. with the third exit

block, the base through the third resistor with the emitter and the first output of the block connected to the input through the switch and the fourth resistor with the base of the second transistor.

The invention relates to instrumentation technology and can be used to determine the location of electrical circuit damage. A device for monitoring the integrity of an electrical circuit from a series of series-connected contacts is known, containing two-position electromagnetic relays and signal elements Cll according to the number of control sections. However, this device has limited functionality, as it allows only single circuit breaks to be detected. If two or more discontinuities occur simultaneously, the device does not detect a discontinuity, since the operation voltage of each relay is more than half the supply voltage of the coil of the contactor. The closest in technical essence and the achieved result to the proposed is a device for detecting short-term breaks in the electric supply supply circuit, containing by the number of control units of 1 circuit sections identical blocks of voltage switches, recording blocks, reset block, made in the form of a disconnecting button, and block 2. The known device has limited functionality. In a controlled circuit, in the general case, single breaks, group breaks are possible, Suitable oiskhod simultaneously and group breaks, etc. outgoing sequentially in time. All of these gaps trigger the known device. However, the signal information of a known device is impersonal in relation to the type of the indicated breaks and their number (all breaks are perceived by the device as single). Therefore, using a known device, they operate sequentially: detecting one break, repair the damage, then turn on the device again to detect another alleged break and then repair the corresponding damage, and so on, until all group breaks are detected. This ultimately requires a lot of time for examining the state of the electrical circuit and finding the location of the damage. The purpose of the invention is to expand the functionality of the device. This goal is achieved by the fact that in a device for detecting short-term breaks of an electrical circuit containing, according to the number n, in series, con. monitored sections of the circuit; voltage switch blocks and registration units; a blocking block connected to the terminal for connecting the first output of the first section of the monitored circuit, a second output to the terminal for connecting the second output of the 5th section of the monitored circuit, and the input to the first outputs of the blocks registration connected by the first inputs to the outputs of the reset unit, the second inputs to the first outputs of the respective voltage switch blocks, each of which is connected by a first input to a terminal for the first output of the corresponding monitored section of the circuit, the second inputs with the second inputs of the remaining voltage switch blocks, the registration unit contains the display element, the second outputs of all the voltage switch blocks are connected to the first output of the first controlled circuit section and the second bypass of the first registration block, The first inputs of each I-th block of voltage switches, except for the n-th, are connected to the corresponding second output of the (It) -th registration block, the third outputs and inputs of each b the detection locations are connected respectively to the third inputs and inputs of the respective voltage switch blocks connected by second inputs to the third output of the blocking unit connected by the second output to the input of the reset unit, the voltage switch block comprising first, second and third resistors each of which is connected between the first input and the first output, the second input and the third output, the third input and the second output of the voltage switch block, respectively, the registration block contains connected a light beam, an LED and a photothyristor, a diode, a first transistor, a capacitor and a first resistor connected by the first output to the second output of the unit and the emitter of the first transistor connected by a base to the second output of the first resistor, and through a capacitor to the second input of the unit through the LED with the third input of the unit connected by the first input through the photothyristor to the first terminals of the diode and the display element connected by the second output pins 1 to the first and third outputs of the block, respectively, the blocking block soda It contains the second, third and fourth resistors, a switch and a second transistor connected by a collector through a second resistor to the second output of the block, directly to the third output of the block, to a base through the third resistor to the emitter and to the first output of the block to the fourth resistor to base of the second transistor. FIG. 1 shows a block diagram of the device; FIGS. 2, 3 and t are electric circuits of the blocking blocks, voltage switches and registrations, respectively. The device for the electric circuit; pi divided into areas containing a load 2 connected between the common bus 3 and the power supply bus k. contains blocks of voltage switches, registration blocks, reset block 7, block 8 block, first inputs, first outputs of voltage switch blocks, second, first, third registration blocks, first outputs of registration blocks, second inputs of switch blocks eg wiring connected by bus 1b, output 17 of reset unit 7, input 18, second 19 and first 20 outputs of block B, third inputs, second and third outputs of voltage switch blocks, third and second 25 1-25 And outputs of registration blocks , input block 27 reset, WTO s resistors 28, the second transistors 2E, the switch 30, the first 31, second 32 and third 33 variable resistors ZA elemen1y indication fototiristory Zb diodes 35, first transistors 37 capacitors 38, the LEDs 39 of the third resistors 4a, apparatus operates as follows. If it is necessary to find out which of the contacts of the controlled sections, ..., the electric circuit is broken first, switch 30 turns on blocking unit 8. At the moment of contact breaking, for example, a current pulse passes through the circuit:, 2 ,,,,, 1b2,,, .3, with the result that the current pulse amplified by the transistor 37 in the block passes through the photothyristor 35 along the circuit of the elements: k, 19 , 8, 26, 16,,,,,,,,. The transistors 37 in other registration units 6 are securely closed, since their emitter-base junctions are jumbled with closed contacts of the circuit sections. In this case, the photothyristor 35 is opened in the block along the circuit of the elements: k, 7,,,,,, which turns on the indication element 3 in the block, Simultaneously, the voltage applied to the element 3, through the circuit,, l8 turns on the transistor 29 in the blocking block 8, whereby the voltage from the power supply bus 16 is removed from all LEDs.

At the same time, the display element C of the block is turned on due to the fact that the photo thyristor 35 of this block stores its initial state.

The output of the transistor 29 from the blocking state can be accomplished only by breaking the power supply of the photo thyristors 35 by means of a reset unit 7, which brings the device to its initial state. When any other part of the electrical circuit is broken, the display element 3 of the corresponding registration unit b is turned on in the same way and the possibility of switching on all other signal elements from the corresponding breaks, which appeared later, is excluded by a similar blocking. It is characteristic that simultaneously two or more fractures occurring are also detected and recorded by the device in the described mode, which is not provided by the known devices.

With the simultaneous occurrence of several discontinuity of the chain, for example, in the sections and the input current pulse passes through the circuit of the elements: i, 2,,,, ,,. ,,,,, 6-1,, 3 and opens in blocks and transistors 37. In this case, the current pulses through the LEDs 39 in the blocks and

pass through the chains:, 19, 8, 26, 16 ,, 15-Ь,. , .3 and, 3. , 19, .8, 26, 16,,,,,,,,,,,,,, 3.

The parameters of the capacitor 38 are selected from the condition of the passage of the indicated current pulses, taking into account the parameters of the block 5i

In the following manner, the elements 3 in the blocks and the transistor 29 in the blocking block 8 are turned on. A characteristic feature of the proposed device is also the possibility of detecting and registering several chain breaks occurring sequentially in time. In this case, block 8 by means of a switch 30

disconnect. In this case, it is possible to turn on and fix (by using photo thyristors) each signal element 3 in any controlled area.

electrical circuit depending on its state at a given time interval. Thus, it is possible to recognize single and group breaks with additional information about the number of breaks in groups and the order in which they follow (simultaneously or sequentially), which expands the functional capabilities of the device.

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Claims (1)

DEVICE FOR DETECTING SHORT-TERM RELEASES OF THE ELECTRIC CIRCUIT, containing, according to the number η of series-connected controlled sections of the circuit, blocks of over-. voltage switches and registration blocks, a blocking block connected to the first output of the first terminal of the monitored circuit, the second output to the terminal for connecting the second terminal of the ηth section of the monitored circuit, the input to the first outputs of the registration blocks connected by the first inputs with outputs of the reset unit, second inputs - with the first outputs of the respective voltage switch blocks, each of which is connected by the first input to the terminal for connecting the first output corresponding of the monitored section of the circuit, the second inputs - with the second inputs of the remaining voltage switch blocks, and the registration block contains an indication element, which includes the fact that, with the Purpose of expanding the functionality of the device, the second outputs of all switch blocks voltages are connected to the first output of the first monitored section of the circuit and to the second output of the first registration unit, switch the first inputs of each 1st unit to the 1st voltage, except for the ηth, connected: to the corresponding second output (il) -ro block registration, the third outputs and inputs of each registration unit are connected respectively to the third inputs and outputs of the respective voltage switch blocks connected by the second inputs to the third output of the block lock connected by the second output to the input of the reset block, and the voltage switch block contains the first, second and third resistors , each of which is connected between the first input and the first output, the second input and the third output, the third input and the second output of the voltage switch block Namely, the registration unit contains a light-emitting diode and a photo-thyristor, a diode, a first transistor, a capacitor and a first resistor connected by a first output to a second output of the unit and an emitter of a first transistor connected directly to the second output of the first resistor and through a capacitor to a second input unit, collector via an LED - with the third input of the unit connected to the first input through a photoresistor with the first terminals of the diode and the indication element connected by second terminals to the first and third outputs block, respectively, the blocking block contains a second, SU _t , 1018058 third and fourth resistors, a switch and a second transistor connected by a collector through a second resistor to the second output of the block, directly to the third output of the block, a base through a third resistor with an emitter and with the first output of the block connected to the input through the switch and the fourth resistor with base of the second transistor.