RU111364U1 - AUTOMATIC TURNING BLOCK FOR POWER SUPPLY OF RAILWAY AUTOMATION AND TELEMECHANICAL DEVICES - Google Patents

Abstract

 1. The unit for automatically switching on the power reserve of railway automation and telemechanics devices, characterized by the presence of inputs of power supply feeders, each of which is connected to internal devices for protection against impulse and switching noise and overvoltage (SPD), which are associated with power quality control devices for each input of power supply and input switching device, said power quality control devices are connected to the input switching control logic circuit s of power supply, which, in turn, controls the operation of the switching device for power supply inputs, the output of which is connected to an internal circuit protection device from impulse and switching noise and overvoltage (SPD) and to the diagnostic and indication circuit of the unit, which is connected to the diagnostic information transmission device in dispatch and frequency dispatch control systems. ! 2. The unit for automatically turning on the power reserve of railway automation and telemechanics devices according to claim 1, characterized in that it is structurally made in a separate housing.

Description

The utility model relates to the field of electrical engineering and can be used to organize the power supply of railway automation and telemechanics (ZhAT) devices and other low-voltage consumers of electricity from two independent single-phase alternating current sources with insulated or grounded neutral.

A device for automatically turning on the reserve when used in the production of low-voltage electrical equipment. (Patent on PM No. 78989 dated 12/10/2008)

The device’s housing contains circuit breakers of the main and backup networks and the load network with control elements displayed on the front panel and an automation unit for switching the load from the main network to the backup network and vice versa.

Closest to the claimed utility model is a device for automatically turning on the backup power supply of ZhAT devices in case of turning off the main power source, made on two independent emergency relays of the АСШ2-220М type (V.I. Soroko, V.A. Milyukov "Railway automation and telemechanics equipment" 3rd edition, volume 1, p. 377). The prototype device includes two electromagnetic relays АСШ2-220М, which perform the functions of controlling undervoltage of inputs to 133 V, switching inputs and disconnecting inputs when lowering voltage to 133 V.

This device does not provide sufficient quality of the power supply to the loads due to the lack of continuous quality control of electricity at the power supply inputs, which leads to failures in operation and failure of the ZhAT devices. The lack of status indications and diagnostic devices does not allow for high-quality maintenance and remote monitoring, which also reduces the overall level of power supply to the loads.

The objective of the developed utility model is to create a block for automatically turning on the power reserve of railway automation and telemechanics devices from two independent single-phase alternating current sources with isolated or dead-grounded neutral (hereinafter referred to as ABP block).

The technical result from the use of the utility model is to improve the quality of the power supply to the loads due to the continuous monitoring of the quality of electric power at the power supply inputs and the connection of the input to the load that meets the established requirements for the quality of the power supply.

The task and achievement of the technical result is ensured by constructing the ATS unit, which includes inputs of power supply feeders, each of which is connected to internal circuit protection devices from impulse and switching interference and overvoltage (SPD), which are associated with power quality control devices for each power supply input and input switching device. The aforementioned power quality control devices are connected to a circuit for controlling the switching of power supply inputs, which in turn controls the operation of a switching device for power supply inputs, the output of which is connected to an internal device for protecting the circuit from impulse and switching noise and overvoltage, and to a circuit for indicating the status of the unit, which is connected to a device for transmitting diagnostic information to dispatch and frequency dispatch control systems.

The unit for automatically switching on the power reserve of railway automation and telemechanics devices can be structurally made in a separate building.

Figure 1 shows the structural diagram of the block ABP, consisting of the following elements:

- 1 and 2 - inputs of feeders of power supply;

- 3 and 4 - internal circuit protection devices from impulse and switching interference and overvoltage (SPD) for each input of power supply 1 and 2;

- 5 and 6 - power quality control devices for each power supply input;

- 7 is a diagram of the logic control switching input power supply;

- 8 - switching device for power supply inputs;

- 9 - internal SPD for block output;

- 10 - diagram of the diagnosis and indication of the state of the unit;

- 11 - device for transmitting diagnostic information to supervisory control systems;

- 12 - a device for transmitting diagnostic information to dispatch and frequency dispatch control systems.

In accordance with the structural diagram shown in FIG. 1, the ABP unit operates as follows.

Sources of single-phase alternating voltage are connected to the power supply inputs 1 and 2 of the ABP unit. SPD 3 and 4 of each of the inputs protect the elements of the unit from pulse and switching interference and overvoltage. Next, the filtered input voltages go to the input switching device 8. At the same time, the filtered input voltages go to the power quality control devices of each of channels 5 and 6. The power quality control devices continuously analyze the state of power supply inputs 1 and 2 and control the input 7 switching logic. power quality control 5 and 6 may have adjustments to the levels of controlled parameters of power quality, time delay testing for deviation of input parameters from established parameters of electric power quality; time delay for reconnecting input after restoration of its parameters. The control logic circuit of switching inputs 7 by the signals of electric power quality control devices 5 and 6 generates control signals of the switching device of inputs 8, which in turn switches the selected input to the output of the unit (to the load). The circuit of the control logic for switching 7 inputs can operate in two modes: - operation mode with the predominance of the first input; - operation mode with equivalent inputs. The SPD of the output of block 9 protects the elements of the block from impulse and switching interference and overvoltage from the load side. The voltage from the output of the input switching device 8 also goes to the diagnostic and status indication unit 10, which provides a visual display of diagnostic information and control devices for transmitting diagnostic information to the dispatch or frequency dispatch control systems 11.

The ATS unit must have contacts for connecting the power supply inputs 1, 2, contacts for connecting the load, may have contacts for setting the unit's operating modes, contacts for connecting to dispatch or frequency dispatch control devices. The ATS unit may be able to adjust the levels of allowable values of the parameters of the quality of electricity. The ATS unit can have two operating modes: - an operating mode with a predominance of the first input; - operation mode with equivalent inputs. The operation mode with the predominance of the first input provides power to the unit load from the first input, if the latter meets the specified indicators of the quality of electricity (disconnecting the first input and connecting the second input to the load is carried out only in the event of a failure of the first input; when the first input is restored, the second input is automatically disconnected and connected to the load of the first). The operation mode with equivalent inputs provides switching the load from a faulty input to a healthy one without returning to the previous input after its restoration.

The ABP block can be made in a separate housing, adapted for use in housing products for placement of blocks.

The developed unit is used in housing products for placement of blocks, it ensures the safety of power supply control of power supply inlets, continuous visual (at the place of operation) and remote (at supervisory control posts) state control of the unit and power supply inputs, continuous safe quality control of electrical power of power supply inlets and connection to the load of the input that meets the established requirements for the quality of power supply.

Thus, this ABP unit completely solves the tasks, providing high-quality power supply to the load from two independent single-phase alternating current sources with isolated or dead-grounded neutral.

The ATS unit can control the quality of electricity by lowering the voltage below the set level, by exceeding the voltage above the set level and by other indicators of the quality of electricity, it can have several thresholds for monitoring the quality indicators of electricity, it allows you to change the threshold levels of the controlled indicators of electric power quality, it can have time delays / connection of inputs to the load at the same thresholds of operation of the power quality control device and ensuring s instantaneous disconnection / connection to the load inputs at other threshold power quality monitoring devices.

Claims (2)

1. The unit for automatically switching on the power reserve of railway automation and telemechanics devices, characterized by the presence of inputs of power supply feeders, each of which is connected to internal devices for protection against impulse and switching noise and overvoltage (SPD), which are associated with power quality control devices for each input of power supply and input switching device, said power quality control devices are connected to the input switching control logic circuit s of power supply, which, in turn, controls the operation of the switching device for power supply inputs, the output of which is connected to an internal circuit protection device from impulse and switching noise and overvoltage (SPD) and to the diagnostic and indication circuit of the unit, which is connected to the diagnostic information transmission device in dispatch and frequency dispatch control systems. 2. The unit for automatically turning on the power reserve of railway automation and telemechanics devices according to claim 1, characterized in that it is structurally made in a separate housing.