SU1699001A1 - Device for monitoring of remote power supply of unattended points of transmission systems - Google Patents

Abstract

This invention relates to multichannel telecommunications. The goal is to increase the length of the controlled line of remote power. The device contains four composite transistors 1-4, twelve resistors 5-16, six diodes 17-22, a reed switch 23 with a control winding 33, three capacitors 24, 25 and 31, two thyristors 26 and 27, a zener diode 28, a shunt element 29, a relay 30 with a break contact 34, dynistor 32. The device provides the inclusion of ballast resistance between the poles of the remote power supply circuit in the event of an open circuit. In this case, the damaged area is cut off with the replacement of its ballast resistance, all points to the place of the cliff receive normal power. The loop is established due to the fact that when the line is broken, the relay 30 is de-energized, the contact is closed, 34, so that transistors 1-4 are opened through the reed switch 23, connecting the loop. silt

Description

The invention relates to multichannel telecommunications and can be used + at maintenance-free amplification points of communication lines.

The purpose of the invention is to increase the length of the controlled line of remote power.

The drawing shows the principle. The electrical circuitry of the device for monitoring the remote power supply of maintenance-free points of transmission systems.

A device for monitoring the remote power supply of maintenance-free points of the transmission system contains the first 1, second 2, third 3 and fourth 4 composite transistors, the first 5, second 6, third 7, fourth 8, fifth 9, sixth 10, seventh 11, eighth 12. ninth 13 , tenth 14, eleventh 15 and twelfth 16 resistors, first 17, second 18, third 19, fourth 20. fifth 21 and sixth 22 diodes, opening reed switch 23. first 24 and second 25 capacitors, first 26 and second 27 thyristors, zener diode 28 Shunt element 29, relay coil 30, third capacitor 31, dynstor 32. winding 33 Control reed contact switch 34.

A device for controlling the remote power supply of maintenance-free points of the transmission system operates as follows.

In the absence of damage on the line and when the voltage is turned on through all voltage dividers formed by resistors 12 and 7-10. leakage current begins (microamperes). The charge of the capacitors 31 begins. At the same time, the circuit of the shunt elements 29 of all series-connected devices sets the operating value of the currents (for example, 120 mA). Since these currents significantly exceed the charging currents of the capacitors 31, the capacitors 24 are first charged to the breakdown voltage of the zener diodes 28. After that, the thyristors 26 are unlocked, and the capacitors 24 are discharged to the windings 30 of the intermediate reed relays, which, when triggered, break the contact line of the dinistors 32 and 32 windings 33. After a time due to the time constant of the RC circuit 6, 25, the thyristors 27 are unlocked, bypassing the windings 30 of the relay with resistance 5. In this case, the relay remains on, but the total equivalent resistance enu, the connected, hydrochloric shunt element 29 to substantially reduced, which reduces voltage losses in the remote power circuit. All reed switches 23 remain in the open position, all transistors 1-4 are locked.

If there is a break in the supply wire anywhere in the route, all the windings of the intermediate relays lose power, and their contacts 34 are closed. In this case, the pre-charged capacitors 31 are discharged to the windings 33, causing a short-circuit of the contacts of the reed switches 23 and the unlocking of the transistors 1-4. A current begins to flow through the windings 33, the value of which is determined by the value of the ballast resistance Re and the removal of this loop-forming device from the power source. Sufficient to hold the reed switch 23 is a current flowing only through the first device and through the second device. In the remaining devices, the reed switch 23 opens after the discharge of the capacitor, the transistors 1-4 are locked and the process of charging the capacitors 31 begins again.

The current flowing through the second ballast, simultaneously flows through the shunt element 27 of the first device, causing the same actions as when the voltage is applied to the line. Reed switch 23 opens, transistors 1-4 are locked, breaking the ballast circuit Re. When this increases the current in the circuit of the winding 33 of the second device and to hold the reed switch 23 is already the current in the circuit of the third device. In this case, its relay 30 of the second device is activated and the power circuit of the reed switch winding 33 opens, breaking the ballast circuit Re.

The process is repeated further, covering more and more remote devices from the power source. The last device before the breakage point is partially turned on: the reed switch 23 is closed, the transistors 1-4 are open, but the relay 30 is de-energized, since no current flows through the shunt element 29 (there is a breakage point behind it). Thus, the ballast resistance Re is turned on in front of the damage site, forming the equivalent of the rest of the system located behind the damage site, and ensuring the operability of the communication system part located before the damage furniture.

Claims (1)

Claim A device for monitoring the remote power supply of maintenance-free points of transmission systems, comprising a shunt element made in series with a wire of positive potential of the power circuit of the maintenance-free item, a chain of series-connected first diodes and a first capacitor connected in parallel with the shunt element, the cathode of the first diode connected to the anode of the first thyristor a zener diode cathode, the anode of which is connected to the control electrode 5 of the first thyristor, and the second output of the first capacitor is dinene with the cathode of the second thyristor and the first terminal of the second capacitor, the second terminal of which is connected to the control electrode 10 of the second thyristor and the first resistor, the second terminal of which is connected to the first. the output of the second resistor, the second output of which is connected to the anode of the second thyristor, as well as a chain of components of the first, second, third and fourth transistors, the third, fourth, fifth and sixth resistors connected between the collector and the emitter, respectively, of the first, second, third and the fourth 20 transistors, and the emitter of the fourth transistor is connected to the seventh resistor, the second terminal of which is connected to the anodes of the second, third, fourth and fifth diodes and the first output of the reed switch, as well as 25 a reed switch and an eighth resistor, which, in order to increase the length of the controlled remote supply line, a relay with an open contact, a third capacitor, a sixth diode and a dinistor are introduced, and the relay winding is connected between the connection point of the first and second resistors and the cathode the second thyristor, the second output of the reed switch is connected to the collector of the first transistor, as well as to the first conclusions of the control coil of the reed switch, the eighth resistor and the third capacitor connected in parallel to the chain consisting from the control winding of the reed switch, dinistor and relay contact, as well as a chain consisting of an eighth resistor and a sixth diode, and between the cathode of the second, third, fourth, fifth diodes and the base of the first, second, third, fourth transistors, respectively, the ninth, tenth, eleventh and twelfth resistors, and the anode of the first thyristor is connected to the first terminal of the second resistor, Editor L. Pcholinskaya Compiled by A. Mikutsky Tehred M. Morgenthal Corrector O. Tsiple Order 4402. Circulation Subscribed VNIIIPI of the State Committee for Inventions and Discoveries at the State Committee for Science and Technology 113035, Moscow. Zh-35, Raushskaya nab., 4/5 Production and Publishing Plant Patent, Uzhgorod, 101 Gagarina St.