SU1251199A1 - Device for arcless switching of electric network - Google Patents

Abstract

The invention relates to the field of electrical engineering and is intended for switching el. AC and DC circuits. The purpose of the invention is to reduce power consumption and increase reliability. When a control pulse is applied to the enable input 12, the charging current of the capacitor (K) 8 flows through the diodes 10, 14, the emitter junction of the transistor (T) 27 of the switch (P) 24 and the resistor 31. The T 27 opens. The charging current K 8 flows through the winding of the polarized relay (PR) 6. It turns on and its contact 4 closes. When the control pulse is removed from input 12, transistor switch 19 and T 25 open. The discharge current K 8 flows through the winding PR 5. It is turned on, its contact 3 is closed, and the key 7 is flown through the input circuit of the optocoupler 22. Since the speed of the key 7 is significantly higher than the speed of the PR, the contact 3 closes when the key 7 is turned on, which will provide an arc-free closure of the el. chains. The trip occurs similarly when a control pulse is applied to the trip 13 input. 1 il. sl yu sp (x o

Description

The invention relates to electrical engineering and is intended for switching the electrical value of both a 1H10 and an alternating current.

The purpose of the invention is to reduce foot-rebound power and increase device reliability.

The drawing is a schematic diagram of the device;

The device for without; 1-arc commutator electrical switchboard contains the first and second outputs 1 and 2 for connecting the switched value to which the terminals are connected in series | -; the first contacts 3 and 4 of the first 5 and the second 6 iolize single-winding relays, the first to:: 1, (.) blagody1 one stable state lii .eM, io; 1, connected parallel to contact 3 iiepijoro relay 5, the control unit, include ;;;; The 8 second is the second 9 capacitors, | 1о. The key is the nerve of the nerve cell; -.ii opoi OI 1 diodes, the cathodes of which are connected to each, correspond to the control inputs for the petunum and the second inputs 12 and 13 for 1H11J) and disconnect, respectively, and the second lining for the third cathode 16 and the anode niecToi ci respectively 1 / diodes, for the first time the outputs are even; - cr) of that 15 and HiecToi o 17 ana diodes,: i) 1 and we are the first input of the first 0 and BTopoi o 1 diodes, which are connected to the control unit of the third input 18 corresponding to The first 19 and second 20 transistors)), e. switches, control inputs of the co-Topbix nodkl1Oche1P: 1 respectively to the uravl luschm nspl “mu and the second inputs 12 and 3 of the C1. er,; (and O1 key 11i, two ogggropa 21 and 22, iicpBbiii n)) oh BXOji, bi OLH of many of which are interrupted between controlling second input 13 of disabling n controlling total tertiary) 1m INPUT11 8. the inputs of the other between the KaTOjioM quadrugs} diode 15 are equal to the unigm of the trilling input 18, and the outputs oirrpoHOB 21 n 22 are combined but paro, from the bottom of the circuit into the radio ehodia with the control Bxcj. i.oM first kyuchyu 7, another pair with BTopiiiM ing 2 code 2 for switching switchboard, connecting 1 m to the first to; 1 to 7, two toggle. Circuits 23 and 24, each 1) | nd pz which are made on TWO transistors of type 1 i, K (), 11, 1 vector outputs 1: transistors 25 and 2 () in the first 23 and collector pins Tpai 3iiCTopoB 27 and 28 in the second 24 switch. x connected and connected with perovgmi winding pins according to the first 5 n BTopoi o b relays, and the second pins () 1h to relays 5 and 6 are connected to the control P P.im oonuiM by the third input 18, to KOTOptniy i .c- rez1 reformers 29-32 are connected cooTiiCTCTBcniu) pervip-i, second, tre1Ch, quad: basic output | 1 transistors 25–28 of the first 23 and second 24 switches, while the emitter outputs of transistors 25–28 of the first 23 and second 24 transistors are connected respectively to the cathode of the fourth 15 and the anode of the fifth 16 and to the anode of the third 14 and the cathode of the plated 17 diodes.

The device for arc-free switching of electric peep works as follows.

When a control pulse is applied to the first turn-on input 12, the charge current of the capacitor 8 flows through the diodes 10 and 4, the emitter junction of the transistor 27 of the switch 24

and a resistor 31. G1 is a flow of current through an amptater, 1Y p. junction of transistor 27 leads to the opening of this transistor and, accordingly, to the flow of the charging local of the capacitor 8 also through the winding of a zero relay 6 in the direction at korg) m iipo

the relay turns on and; a

of contact 4. At the moment of removal of the lane vn- |) connection from the input of 12 wk, chucha and zary) PI) 1m capacitor 8, nerve opening 14) transient switch 19 and traslot (pa 25 switch 23, which leads to leakage This current of the capacitor through the polarity of the polarized relay 5 in the atmosphere, at which it is turned on and the closure of the co Γ -actact 3. and through the input circuit of an on-line 22, ti;

the first key 7 is turned on. At the same time, since the speed of the wrench key 7 is significantly higher than the speed of the relay, the closure of the copet 3 occurs. first key 7, which ensures the arcless closure of the electric.

When the imiudayer is delivered to the service unit (burned in. 13 outgoing / iochein iic) —in: n: acha; 11) BUT, uptoTeKaiine charge occurs on the bottom-Io of the capacitor current 9 ps) after diodes I 1 to 15, emitter junction transistor 26

switch 23: .i resistor 30. Leakage of the current through the emptart non-transition of transistor 26 leads to an all-open transistor 26 and. Of course, the flow of the current of the condenser 9 also through the threshing of the r-5 in the direction of

which iroiskO; IgG otk. point of i-; the expansion of the act 3. At the same time, vg) was inserted: d, the action of the pulse of disengagement, when the break of the cycle 3 occurred; i; epBbn i к, key 7 is in the enabled eosloke.

Sock to the control second disconnect 13, the input 01T1) 01sh 2 is connected. That resulted in the first key 7, which includes the fifth state. As a result, an arc-free disconnection of the copade 3 is ensured. In mmegp spi imglllsa it is leveled; and from the second)

Yes 13 P1K disconnections) NejJBoro key 7 is turned off and the opening is canceled

24, which leads to the flow of the capacitor discharge current through the winding of the polarized relay 6 in the direction in which it is disconnected and opening of the contact 4. Initially, due to the much faster speed of the controlled semiconductor key, the switch is switched off by the first key compared to the relay 7, and then the final electrical break

the first and second optocouplers, the first control pin, the first input of the optocoupler are connected to the third input of the device, the second control input of the first optocoupler is connected to the second input of the device, the first control pin of the second optocoupler is connected to the cathode of the fourth diode, and the second control input of the second optocoupler is connected to the third input of the device, the first outputs

Values of contact 4 and, thus, as well as 10 optocouplers connected to the control input of the electrical circuit, provides arc-free disconnection of the relay contacts.

Claims (1)

Invention Formula Device for arc-free switching of an electric circuit, containing series-connected contacts of the first and second relays, the free terminals of which are 15 the first key, the second outputs of the optocouplers are connected to the second output of the device, characterized in that, in order to reduce power consumption and increase reliability, the first and second switches, four resistors, switches are made of the first, second and third, fourth The transistors, the collectors of the first and second transistors connected to the first terminal are the first and second outputs of the first relay, the emitter of the first device transistor, the first switch connected in parallel The first and second capacitors, the first plates of which are connected respectively to the anodes of the first and second diodes, whose cathodes are connected to the first and second inputs of the device, the second plates of the third and anode of the fourth diode and cathode of the fifth and anode the torus is connected to the cathode of the fourth diode, the emitter of the second transistor is connected to the anode of the fifth diode, the base terminals of the first and second transistors are connected via the first and second resistors to the third input of the device, the collectors of the third and fourth transistors are connected to the first output winding of the second relay, the emitter of the third transistor The third diode is connected to the third diode, the fourth transistor is a diode of the diode, the second and third transistor are connected to the cathode of the three diode, and the keys whose emitter junction is connected Allelic respectively first and second diodes and the collectors are connected to the third input device, the control inputs of the second and the third transistor The first and second inputs of the device, the first and second optocouplers, the first control, the first input of the first optocoupler connected to the third input of the device, the second control input of the first optocoupler connected to the second input of the device, the first control The NOW of the second optocoupler is connected to the cathode of the fourth diode, and the second control input of the second optocoupler is connected to the third input of the device, the first outputs the first key, the second outputs of the optocouplers are connected to the second output of the device, characterized in that, in order to reduce power consumption and increase reliability, the first and second switches, four resistors, switches are made of the first, second and third, fourth transistors, the collectors of the first and second transistors are connected to the first terminal of the winding device connected to the cathode of the fourth diode, the emitter of the second transistor is connected to the anode of the fifth diode, the basic terminals of the first and second transistors through the first and second resistors are connected to the third input of the device, the collectors of the third and fourth transistors are connected to the first output winding of the second relay, the emitter of the third transistor is connected to the third diode canal, the emitter of the fourth transistor outputs of the third and fourth transistors through the third and fourth resistors are connected to the third the input of the device, the second terminals of the windings of the first and second relays are connected to the third input of the device