RU2693884C1 - Device for control and switching of circuits ira (measuring relay apparatus) - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: present invention relates to electrical engineering, in particular to methods of controlling electrical resistance between multiple electrical circuits. Technically, this solution has no similar counterparts. Device for control and switching of circuits “IRA” (measuring relay apparatus), then DCSC, is a sealed housing with internal thermal insulation, in which the following external electrical connections and sealed housing are provided. General schematic diagram of the device is presented in Fig. 1. In fig. 1 CU – control unit, WDTCM – wireless data transmission and control module, DS – decoder-switch, DM – decoder-meter, RU1…RU5 – relay units, ICU – indication and control unit, TCS – unit of thermal control system, VSU – voltage stabilization unit, AB – accumulator battery (self-contained power supply), SPC connector – plug connector for tested cable connection. Device may operate either from an external source or from AB. After the instrument is switched on, the TCS generates an internal atmosphere at the DCSC to the preset parameters. DCSC mode is selected via ICU: self-test, work with recorded program, operation with external control, connection with external control device, etc. In the process of checking, according to the specified program or by commands of the external control device, CU transmits the parallel binary code on the K bus to the DS. DS converts this code into commands for RU1…RU5. In RU the specified checked circuits are connected to buses I or II, at that each of RU switches its part to tested circuits. Thus, the tested electric circuits can be switched in various combinations in composition of 3 groups: combined and connected to the bus of the first measuring contact (I); combined and connected to second measuring contact (II) bus; disconnected and not connected to any bus. After completion of commutations CU gives instructions in DM for connection of buses I, II and/or housing contact with preset program to internal resistance measuring bridge, then relay in DM connect output of this bridge to ADC CU. Thus, the code from the ADC corresponds to the measured active resistance between the unknown circuits. CU disconnects DM and performs program processing and recording into internal memory of obtained data. In compliance with preset verification program, CU may re-overhaul DM or re-commutator DS. Upon completion of the test, the CU through the ICU signals its positive or negative passage, all the verification data are stored in the CU internal memory and can be transmitted to the external control device. Disclosed scheme of DCSC allows commutating the tested circuits in groups in various variations, has the ability to record, store and transmit inspection programs and obtained data, which enables automatic analysis of results of checks and self-monitoring, wherein modular circuit of device construction enables to timely detect and perform replacement of faulty units.

EFFECT: technical result when implementing the disclosed technical solution is possibility of inspecting integrity and insulation resistance of cables, automatic fault search in cable or cable network, connected circuits switching in accordance with the specified circuit, saving of this switching circuit in the switched off state, which reduces power consumption of the whole device.

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Description

The present invention relates to the field of electrical engineering, in particular to methods for ensuring control of electrical resistance between multiple electrical circuits. This problem is quite relevant due to the constant need to carry out operations using various instruments and measuring instruments to monitor the integrity of electrical circuits and the disconnection between them in cable products with different electrical circuitry of internal connections.

Background of the invention.

At present, instrumental control is used to monitor the state of a branched electrical cable network using various instruments and measuring instruments. To determine the health of an electrical cable or cable network, the following types of electrical measurements are carried out:

- checking circuits for disconnection between each other and (if available) with the case of connectors or cable screen, or the common contact of the cable network;

- checking the integrity of the electrical circuits of the cable or cable network.

Carrying out these checks is complicated by the large number of circuits in the cable or cable network, the complex topology of the circuits (the complex electrical circuitry of the internal connections), the location of possible places for the implementation of the cable or cable network.

Known devices and measuring instruments used to determine the health of an electrical cable or cable network can be characterized by several basic tactical and technical properties:

- the number of simultaneously tested circuits;

- method of switching circuits (manual or automatic with the help of relays, semiconductor ERI, packet switches, etc.);

- the ability to carry out switching of circuits with a given program or algorithm;

- the ability to conduct independent analysis of the health of an electric cable or cable network;

- autonomy of operation or dependence on external power supply;

- device mobility;

- climatic conditions of the device.

Known device set 11H172 (developer and manufacturer of the SNNP "Association Kommunar", Ukraine, Kharkov). Kit 11H172 provides verification of the integrity and resistance of the insulation of cables, and also performs automatic troubleshooting in the cable with an accuracy of a specific number of the faulty circuit and, if necessary, allows the measurement of active resistances. Kit 1N172 was developed and modified in the 90s and has several disadvantages:

- the kit simultaneously checks one electrical circuit;

- automatic circuit switching using packet switches controlled by stepper motors. This provides reliable galvanic isolation, but low speed of bringing to the required switching state;

- there is no possibility to carry out switching of circuits with a given program or algorithm;

- the possibility of independent analysis of the health of the electrical cable or cable network, depending on the connected test plugs or cables;

- work only from an electrical AC network with a voltage of 36 V and a frequency of 50 Hz;

- the average mobility of the device (the weight and size of the device, allowing its transfer by one person, but within the limits of the ability to connect the device to the electrical network).

Another known device is the C-13262 circuit control device (developer and manufacturer of AO N. Semikhatov Scientific and Production Association of Automatics, Yekaterinburg, Russia). The C-13262 device is designed to automatically monitor the integrity of the circuits and the insulation resistance of disconnected circuits. The choice of controlled circuits is carried out at the command of the top-level personal computer. The C-13262 device is designed using modern digital technologies, but has several disadvantages:

- the device simultaneously checks one electric circuit;

- automatic switching circuits using semiconductor ERE that does not provide reliable galvanic isolation;

- the ability to carry out switching circuits only under the control of a PC;

- there is no possibility to carry out an independent analysis of the health of the electric cable or cable network;

- work only from the electrical network through a network adapter;

- low mobility of the device, since its work requires additional equipment;

- Sparing climatic conditions of the device, not allowing work with the device outdoors, protected from the external environment.

The objective of the invention is to develop a device for monitoring and switching electrical circuits, which will have the following tactical and technical characteristics:

- carrying out with the help of a single meter simultaneous measurement of several measured electrical circuits due to a given switching;

- automatic switching of electrical circuits using polarized relays, which will ensure reliable galvanic isolation of circuits and preservation of a given circuit switching circuits inside the device in the absence of electrical power;

- the ability to work both with external control and independent switching of circuits with a given program;

- the ability to conduct independent analysis of the health of an electric cable or cable network;

- the ability to control and exchange data with the device by means of an electrical or wireless connection using a computer or mobile device;

- the ability to work from an external power supply or battery life;

- mobility of the device (weight and size of the device, allowing its transfer by one person);

- device operation in harsh climatic conditions (in large temperature and humidity ranges of the environment, dust or in aggressive environments);

- fire and explosion-proof execution.

The device for monitoring and switching circuits "IRA" (measuring relay apparatus), then UKKTS, is a sealed enclosure with internal thermal insulation, in which the following external electrical connections are provided:

- connector for connecting external power supply from an electrical network or an autonomous source of electricity;

- connector for connection of UKKTs to the checked electric chains;

- connector for connecting UKKTs to a computer or mobile device.

The sealed housing of the UCCT has the ability to quickly open it for access to the internal equipment. On the UCCT case there is a hermetic display and control panel. The general schematic diagram of the device is shown in FIG. one.

FIG. 1 BKU - control control unit, MBPDU - wireless data transmission and control module, DShK - decoder-switchboard, DSHI - decoder-meter, BR1 ... BR5 - relay blocks, BIU - indication and control unit, CTP - thermoregulation system block, BSN - voltage stabilization unit, battery - rechargeable battery (autonomous power source), SSR connector - plug connector for connecting a cable to be tested.

FIG. 1 marked power and information tires:

- П - Power bus that feeds all blocks with voltage of 5 V (for control of blocks) and 12 V (for switching);

- С - System bus for turning on and off the UHCC, status and operation indication, starting and stopping the mode;

- Д and Д - Data bus for loading sketches, reading results and remotely controlling the ECCS;

- K - Bus switching for direct control of operating modes and switching circuits;

- B - Switched circuit selection bus;

- And - Tire gauge for measurement control;

- I, II and R - the tire of the first measuring contact (I), the tire of the second measuring contact (II) and the tire of self-checking resistance (R).

In the BUD there is a processor module with internal memory for storing programs and data. The module has the necessary electronic equipment, digital and analog I / O to work with other UKKTS units, as well as to communicate with an external control device via MBPDU or USB. Also in the BUD there is an ADC for measuring voltage from DSHI. DShK is designed to control the work of the BR. In the BR, direct switching of the tested circuits to the tires of the first or second measuring contact occurs, as well as to the bus R. Each BR switches with 10 tested circuits. For example, in FIG. 1 and 2 KWCC has five BRs, but their number may be different, while the basic principles of the work of the KWCC remain unchanged. DSHI is designed for switching I, II, R buses and / or case contact of the UKCC center with each other in order to connect them via an internal resistance measuring bridge to the ADC in the BUD. BIU is intended for turning on / off the UCCC, for issuing manual commands in the BKU and displaying information about the UCCS using indicators. The CTP is designed to bring and maintain the internal atmosphere in the UCCC in the required condition for the operation of all elements of the UCCV. For example, in FIG. 1 UKCC has five BRs, but their number may be different, while the main principles of the UKCC center remain unchanged.

The device can work both from an external source of direct current with a voltage of 24 V, and from the battery. After turning on the device, the CTP causes the internal atmosphere in the FCC to the specified parameters. When the required temperature inside the device is reached, the BKU issues a signal on the readiness of the UCCC through the control unit. The control center selects the work center through self-control devices: self-check, work according to the recorded program, work with external control, connection with an external control device, etc. In the process of checking the connected cable, the control unit in accordance with a given program or at the command of an external control device transmits a fifteen-digit parallel binary code over the K bus to the SAD. DShK converts this code into commands for BR1 ... BR5. In the BR, the specified tested circuits are connected to the buses I or II, with each of the BR switching its part to the tested circuits, that is, the BR1 switches the circuits 1 to 10, the BR2 circuits from 11 to 20, etc. after completion of switching, the BKU gives commands to connect the I, II tires and / or the body contact with a given program to the internal resistance measuring bridge in the DSHI, then the relay in the DSHI connects the output of this bridge to the ADC of the BKU. Thus, the code from the ADC corresponds to the measured active resistance between the desired circuits. The BKU turns off the DSHI and performs software processing and recording of the received data into the internal memory. In accordance with a given testing program, the BSU can re-switch the DSHI (for example, measure the resistance of the circuits first, when connected to the bridge in one polarity, and then in the reverse polarity, to take into account the influence of the reactive component of the resistance in the cable being tested) or re-switching the ACS. At the end of the check, the BUD through the CMS signals its positive or negative passage; all the check data is stored in the BKU internal memory and can be transferred to an external control device.

FIG. 2 shows the general schematic diagram of the DShK. From the control unit to the DSBK, a fifteen-digit parallel code comes to the bus K, part of which (bits: C, 0, 1, 2) via the binary decoder DC determines the control commands for the BR, and bit 3 determines the choice of the bus of the first or second measurement contact (PI or PII. Bits 4 ... 13 are intended for commands to select the tested circuits in the BR (Y0 ... Y9). Single-stable two-position relays are used in the ACS.DWH selects the operating mode of the BR by switching the operating voltage of 12 V into commands: Slave - working mode of operation or Pro - self test mode; Reset - reset sun x BR to its initial position;. UP1 UP5 ... - a command dial to select BR1 ... respectively BR5 Further bus receives all the control commands in the BR.

FIG. 3 shows a general schematic diagram of the BR. K0 ... K9 - tested circuit. They are connected to the PD - two-position, two-stable remote switch with multiple switching contacts, which selects the mode of operation of the BR unit (working or self-testing). Further, the tested circuits connected through DP in CK0 ... CK9 through relays B0 ... B9, which are two-position, two-stable relays with two switching contacts, will be switched to the circuit BK0 ... BK9 according to the selection commands of the corresponding circuits U0 ... U9. The RP relay is a two-position, two-stable relay with two switching contacts, is a BR selection relay, that is, if a UE command arrives at the RP, then selection commands Y0 ... U9 will be executed by relay B0 ... 9. In addition, VO ... B9 relays can be reset to their original state by a RESET command. The relay PO ... P9 is a two-position, two-stable relay with two switching contacts, which are responsible for connecting the appropriate circuits VK0 ... VK9 to the bus of the first or second measuring contact (commands PI or PII).

Thus, according to the commands of the DShK, the electrical circuits of the connected cable to be checked can be switched in various combinations as part of 3 groups:

- Electrical circuits connected and connected to the tire of the first measuring contact (I);

- Electrical circuits connected and connected to the bus of the second measuring contact (II);

- Electrical circuits disconnected and not connected to any bus.

Under the control of the BUD, both through the recorded program and through the external control of the UMCC, there are many options for “filling” these contact groups, which will give incomparable advantages over other devices that use only one electric circuit for switching and testing. Application in the BR as a switching two-position, two-relay relays with two switching contacts will allow not only to carry out reliable galvanic isolation of the circuits, but also in the intervals between switching not to expend power to maintain the switched circuit in the required state, which will also allow using the CCCH in the off state as circuit switching devices. In addition, the BR provides a self-check mode through the connection of the operating circuits of the BR to the self-testing resistance (R), which increases its reliability.

USED BOOKS

1. SHYUGI.468214.003TO. The device control circuits C-13262. Technical description.

2. IE2.703.897TO. Kit 11N172. Technical description.

3. Shishmarev V.Yu. Automation: a textbook for SPO. Ed. 2nd, rev. and add. - M .: Yurait Publishing House, 2017. - 284 p.

Claims (1)

The device for monitoring and switching IRA circuits (measuring relay apparatus) is a portable automated software device designed to check the integrity and insulation resistance of electrical circuits, automatically troubleshoot a cable or cable network, and switch connected circuits into groups in different variations according to a given scheme ( program), consisting of a control control unit, a wireless data transfer and control module, a decoder-switch, a decoder-meter, a block relay, display and control unit, thermoregulation unit, voltage stabilization unit, rechargeable battery (self-contained power source), plug connector for connecting a cable to be tested, and it is possible to simultaneously measure several electrical circuits, automatically switching electrical circuits using two-position, two-stable relay, which ensures reliable galvanic isolation of the circuits and preservation of the specified circuit switching circuit inside the device in the absence of and electric power.

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