SU1198462A1 - Multichannel device for checking transducers of relay commands - Google Patents

Abstract

MULTI-CHANNEL EQUIPMENT FOR THE CONTOUR OF SENSORS OF RELAY COMMANDS, containing a self-test relay, a switching contact connected to the positive power supply bus, the first indicator, and in each channel the first element I, the first and second days, the BAN element, the second and third indicators and control relays , the first leads of the windings are connected to the corresponding inputs of the device, and the second leads to the zero busbar of the power source, the first lead. The first indicator and the second winding terminal of the self-test relay, the first output connected to the first input of the device, characterized in that, in order to expand the functional capabilities of the device by providing operational control of the contact status of the relay command sensors, control system 19 is introduced into it. GETG-Ei-3 tMMHflTf key, time delay block, and in each channel - memory element, input and output connected respectively to the output of the BAN and the first output of the second indicator, the second output connected to the zero needle power supply and the first successors of the first and The third indicator, in each channel, the inverse input of the BANCH element is connected to the first input of the first element AND and the first output of the normally open contact of the controlling relay of its channel, the second output connected to the cathodes of the first and second diodes, anodes of the first diodes of a composer with a normally closed contact of the self-checking relay and the second input of the first element I connected to the output delays, output connected to the control input of the controllable key, output connected to the direct inputs of the CD elements of the PROHIBITION of all kshals, inverse cx inputs connected to the corresponding 4ik inputs common to all channels of the second element And, the output connected to the first output of the first indicator output device.

Description

It is incompatible with automatics and can be used to monitor the state of relay command sensor circuits. The purpose of the invention is to expand the functionality of the device by providing on-line monitoring of the contact status of the relay command sensors. The drawing shows a functional diagram of the device for monitoring four sensors of the relay. . . The device contains control relays 1-4 with contacts 1.1-4.1, connected to sensors 5 relay commands, and relays; self test 6 with contact, first diodes 7--10, first elements 11-14, second diodes 15-18 second element 19, prohibitory elements 20-23, time delay unit, made on differentiating circuit 24, consisting of a capacitor 25 and a resistor 26, a one-shot 27 and a delay element 28, a controllable key 29, memory elements 30-33, an indication unit 34 consisting of a first indicator 35, a second 36-39, and a third 40-43 indicator. The inputs of the device are connected to the corresponding outputs of the object of control - sensor 5 relay commands. The device works as follows. After supplying the supply voltage in the absence of signals from the outputs of the monitored relays of the relay commands, the device operates in a self-test mode, which reveals possible sticking of each of pins 1.1-4.1 of control relays 1-4, plus a power source through normally closed contacts 6-1 relay 6 self-test, enters through the first diodes 7-10 to the second terminals of the closing contacts 1.1-4.1 of the control relay 1-4.

If any contacts of the monitored circuit stick, then the plus goes to the first inputs of the first elements 11 - 14 corresponding to these contacts, on the second inputs of which there is a plus of the power source through the normally closed 6-1 contacts of the 6 self-test relay. In this case, those first elements And, on both inputs of which there is a plus, are triggered, and their output signal turns on the corresponding third indicator 40-43, signaling that there is a fault in the channel like sticking of contacts.

For example, when sticking contact 1-1, the first element 11 is triggered and the third indicator 40 turns on. Similarly, when sticking contacts 2.1-4.1, the third indicators 41-43 respectively turn on.

In addition, when a normally open contact 6-1 is closed, a self-test relay 6 plus a power source is fed to the information input of the key 29 and the input of the time delay unit consisting of a series-connected differentiating circuit 24, one oscillator 27 and a delay element 28. By;: an overvoltage voltage drop from the output of the differentiating circuit 24 is fed to the input of the one-shot 27 to it from the area of negative limitation to the area of positive

restrictions, i.e., a single pulse of positive polarity is generated at the output of the one-shot 27. On the leading edge of this pulse, delay element 28 is triggered. At the same time through time sufficient dp srabatgeani

contacts 1.1-t4.1 of the control turnips 1-4 from the output of the time delay unit (from the output of the delay element 28) a signal is sent to the upstream input of the key 29, via which the key The second diodes 15-18 do not pass plus the power supply to the normally open contact 6.1 Relay 6 self-resetting, providing protection against the false triggering of the control key 29 in the self-test mode in the absence of relay commands. With the arrival of signals from the sensors of the 5 relay commands, the control relays 1-4 and the self-test relay 6 are triggered. When triggered-. The SRI of the self-test relay 6 plus the power supply through the normally open contacts 6.1 and the second diodes 15-18 goes to the second terminals of the normally open contacts 1.1-4.1 of the control relays. At the same time, the first diodes 7-10 do not pass, plus the power supply to the second inputs of the first elements 11-14, eliminating the false triggering of the control of sticking of contacts during the control of relay commands. If all the commands come from sensors 5, then through the closed contacts 1.1-4.1 plus, it goes to the corresponding inputs of the second element I 19, which operates and outputs a single signal to the device output and to the input of the display unit 34, including the first indicator 35, corresponding to normal sensor operation 5 relay commands. The output signal of the device can be used as a control signal, for example, for blocks, the operation mode of which is determined by the technical state of the monitored sensors 5 relay commands. With the closure of the contacts 1.1-4.1 plus the power source, it also arrives respectively at the inverse inputs of the elements of BANGE 2023, blocking the inclusion of the second indicators 36-39.

 29 closes. When the control key 29 is closed, plus a power source from the output

 the control key 29 is fed to the direct inputs of the elements of BANKS 20-23, on the inverted inputs of which there is a signal prohibiting them from the contacts 1.1-4.1 of the control relays 1-4. In doing so, the elements BOOK 20-23 do not work, and therefore the elements 30-33 of memory do not work and the second indicators 36-39 do not turn on.

If at least one command from the sensors 5 is missing, then the second element AND 19 does not work, the signal at the device output from cjrrcTByeT and the first indicator 35 does not turn on, and there is no signal on the inverse inputs of elements 20–23 BAN, preventing their activation from those contacts 1.1 4.1 control relays 1-4, which are not closed. In this case, those elements of BANKS 20-23, on the inverted inputs of which there is no signal prohibiting their activation, will activate and turn on their channel indicators 36-39 indicating the failure of monitored relays through the corresponding memory elements 30-33, which ensures phytoscope and memory Fault or failure of relay contacts during control of relay commands.

So, for example, if the contact sensors 5 of the first channel fail, the control relay 1, normally open contacts 1.1, will not work. not closed and the inverse input of the element BANGE 20 will be a zero signal.

1b due to the zero signal at one of the inputs of the second element I 19, its output signal is zero, with the result that the first trigger 35 is in the off state. At the same time, after the closure of the controlled key 29, a signal appears at the direct input of the element BAN, 20 and, therefore, one. . a significant signal at its output, which causes the memory element 30 to remember the faults and the second indicator 36 to turn on. Similarly, in the absence of triggering of the contact sensors, 5 relay commands of other channels of the fault are fixed by the element; memory 31-33 with corresponding failure signaling by turning on the second indicators 37-39.

After completing the monitoring of the sensors of the 5 relay commands, the device again switches to the self-test mode. ..

Thus, as a result of ensuring control, not only each relay controlled contact trips, but because of the contact state of each of the controlling relays, which allows detecting the contact contacts of the relay and having an operational information about the operation of each contact. monitored sensors during the operating cycle of control, and also reduces the time and complexity of finding failed monitored relays, extending the fuction

capabilities of the device for monitoring sensors of relay commands. At the same time, the proposed device allows you to simultaneously fix ft faults (where P is the number of contacts of the control relays) by simultaneous parallel scanning of the state of all monitored contacts during the self-test and during the operation cycle of the circuit.

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Claims (1)

MULTI-CHANNEL DEVICE FOR 'MONITORING RELAY COMMAND SENSORS, containing a self-test relay, a switching contact connected to the positive bus of the power supply, a first indicator, and in each channel, the first element I, the first and second diodes, the element BAN, the second and third indicators and control relays , the first leads of the windings connected to the corresponding inputs of the device, and the second leads to the zero bus of the power source, the first output. to the first indicator and the second output of the self-test relay winding, the first output connected to the first input of the device, characterized in that, in order to expand the functionality of the device by providing operational monitoring of the state of the contacts of the relay command sensors, a controlled key, a time delay block are introduced into it, and in each channel - a memory element connected by an input and an output to the output of the PROHIBIT element and the first output of the second indicator, the second output of the source connected to the zero bus, respectively and the power supply and the first outputs of the first and third indicators, in each channel, the inverse input of the FORBID element is connected to the first input of the first element AND and the first output of the normally open contact of the control relay of its channel, the second output connected to the cathodes of the first and second diodes, the anodes of the first diodes are connected to a normally closed contact of the self-test relay and a second input of the first AND element connected to the second output of the third indicator, the anodes of the second diodes are connected to a normally open contact barely self-checking, the information input of the managed key and the input of the time delay unit, the output connected to the control input of the managed key, the output connected to the direct inputs of the elements BAN all channels, inverse inputs connected to the corresponding inputs of the second element And common to all channels, the output connected to the second the output of the first indicator and the output of the device. ,, _m SU ,,,, 1198462