SU1399788A1 - Device for monitoring the condition of switching elements - Google Patents

Abstract

The invention relates to signaling and monitoring devices in control systems of a complex of technical means and technological processes, in particular, to switching devices of electrical circuits, and can be used to diagnose switching elements. The aim of the invention is to simplify and increase the reliability of the device. The goal is achieved in that the device containing the input terminal 1, the element NO 2, the switching element 3, the indicator 4, the element 5 of the comparison, the indicator 6, the output terminal 7, the generator 8 pulses, terminals 9 and 10 of the external circuits, the disconnected element 11 , a bridge terminal 12, a choke 13, a key 14 made of a np-transistor, and pulse transformers 15 and 16 are introduced. When a signal appears at the input terminal 1 and the switching element 3 triggers, the indicator 4 is on, and LED 6 is off. If, however, after the appearance of the input signal, the switching element 3 does not operate, then the indicator 6 is turned on. In the initial state. LEDs 4 and 6 are off. 1 il. "(L s: to 00: p from 00 00

Description

The invention relates to signaling and monitoring devices in systems for controlling a set of technical means and technological processes, in particular, to switching devices of electrical circuits, and can be used to diagnose switching elements.

The purpose of the invention is to increase reliability and simplify the device.

The drawing shows a diagram of the device with

The device contains an input terminal 1, a NOT element 2, a switching element 3, a status indicator 4 (on, on), a comparison element 5, an alarm status indicator 6, an output terminal 7, a generator 8

capable state of switching element 3).

The emergency condition of the device in the event of a short circuit or open circuit in the power terminals of the switching element 3 is detected by turning on the indicator 6, as well as by a positive electric potential at the output terminal 7.

Claims (1)

Invention Formula A device for monitoring the state of switching elements, containing an element NOT, the output of which is connected to the first indicator, a comparison element, a second indicator, a decoupling element, a pulse generator, and a switch output terminals and terminals of external circuits, the first of which is the input of the connection of the first power output of the controlled switching pulses, terminals 9, 10 external elec-tors of zero potential, input terminal, tricymes, dissociating element, capacitor 11, bridge bridge 12 , choke 13, switch 14, made of a pn-transistor, pulsed transformer element, distinguished 15 and 16. The device works as follows. The pulse generator 8 generates pulses that arrive at the pulse 30. The pulse transformer 15 and through the series-connected windings of the two pulse transformers 15 and 16 and the converter; The sensor 11 is connected to this in order to simplify and increase the reliability of the device; in it, two pulse transformers, a bridge rectifier, a choke and a switch made of an pnp transistor are inserted, the input terminal is connected to the first input of the comparison element and to the input of the HE element, the output of which is the input connect to the conclusions of the switching element, the controlling output of the controlled that 3. If these pins are in the open state, therefore, at the input of the bridge rectifier 12 there are no pulses from the generator 8 of the pulses, while the pn-transistor 14 is in the closed state, the indicator 6 is off, the choke 13 prevents the passage pulse generator 8 pulses into an external electrical circuit. In the active mode of the switching element 3 (the indicator 4 is turned on), the control signal transmits its power leads to a closed state, and the pulses from the generator B pulses go to the bridge expander 12. Transistor 14 opens at the input of the element 5, a signal is generated an adequate control signal applied to its other input, and the output signal of the comparison element 5 remains unchanged (i.e., indicator 6 is off, which confirms operation40 45 50 55 switching element, the first terminal connecting the external circuits through the developing element is connected. with the first output of the first winding of the first pulse transformer, the second output of which is connected via the first winding of the second pulse transformer to the first output of the choke, which is the input of the connection of the second power output of the controlled switching element, the second exit of the drose is connected to the second terminal of connection of external circuits, generator output the pulses are connected to the second winding of the second pulse transformer, the terminals of the second winding of the first pulse transformer are connected respectively O with the inputs of the bridge rectifier, the first output of which is connected to the base of the pn transistor key ,, the second output of the rectifier l is connected to the bus of zero potential and to the emitter of the pn transistor output terminal and external circuit terminals, the first of which is the input of the connection of the first power output of the controlled switching potential, input terminal, element, distinguished by e so that in order to simplify and increase the reliability of the device; in it, two pulse transformers, a bridge rectifier, a choke and a switch made of an pnp transistor are inserted, the input terminal is connected to the first input of the comparison element and to the input of the HE element, the output of which is the input connect 0 five 0 five switching element, the first terminal connecting the external circuits through the developing element is connected. with the first output of the first winding of the first pulse transformer, the second output of which through the first winding of the second pulse transformer is connected to the first output of the choke, which is the input of the connection of the second power output of the monitored switching element connected to the second winding of the second pulse transformer, the terminals of the second winding of the first pulse transformer are connected respectively A with the bridge rectifier inputs, the first output of which is connected to the base of the pn transistor key ,, the second output of the bridge rectifier is connected to the zero potential bus and to the emitter of the pn transistor 313997884 a key whose collector is connected to the output of which is connected to the second in- to the second input of the reference element, a dictator and an output terminal.