SU1575269A1 - Device for controlling magnetic starter - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to devices for providing remote control of switching facilities. The purpose of the invention is the expansion of operational capabilities. In the initial state, the winding 1 of the magnetic starter (MP), the windings 4, 9, 13 intermediate relays (PR) and the winding 17 of the time relay (PB) are de-energized. When one of the control buttons (CC) 19 is pressed, the first PR and MP alternately operate and the 17 RV winding is powered. If the control unit 19 is held down, then the control unit activates, breaks, by contact 18, the self-locking circuit of the control unit, as a result, the control unit is turned on while the control actuator is pressed. The "Push" command is executed. If UK 19 is released before the RT exposure expires, the second PR will work and the MP will remain on. When the control knob 19 is pressed again, the third PR will operate, the MP will be disconnected, and when the control cam 19 is released, the second and third PR actuators are turned off, the device is reset. The device allows you to quickly and arbitrarily set the duration of the "Push" function. 1 il.

Description

The invention relates to electrical engineering, in particular, to devices for providing remote control of switching facilities, and can be used, for example, in electric drives of various industrial mechanisms.

The aim of the invention is to expand the operational capabilities of the device by performing the push function arbitrarily without time delay,.

The drawing shows a circuit diagram of the device.

The device for controlling the magnetic starter contains a magnetic starter with a winding 1 and two closing block contacts 2, 3, a first intermediate relay with a winding 4, three closing 5, 6, 7 and one closing 8 contacts, a second intermediate relay with a winding 9, two closing 10, 11 and one open 12 contacts, the third interim relay with winding 13, one closing 14 and two disconnecting 15S 16 contacts, time relay with winding 17 and one disconnecting contact 18, having a time delay when opening5 control buttons 19 sec. abutting contacts and terminals 20, 21 for connecting the power source. One of the findings of the winding 1 magnetic starter, winding approx 4, 9,

13 three intermediate relays and windings 17 of the time relays are combined and connected to one of the terminals 20 for connecting a power source, the other winding 4 terminal of the first intermediate relay is connected via parallel connected control buttons 19

with another terminal 21 for disconnecting the power source, another terminal of the winding 13 of the third intermediate relay through the series-connected first make contacts. ten,

14, respectively, the second and third intermediate relays are connected to another terminal 21 for connecting a power source, another terminal of the winding 17 of the time relay is connected to one of the terminals of the opening contact 12 of the second intermediate relay, one of the terminals of the first closing block contact 2 of the magnetic starter and one of the terminals closing contact 5 of the first intermediate relay are combined and connected to another output 21 to connect a power source, another output of the first closing contact 5 of the first intermediate relay soy It is connected with one of the findings of the opening contact 8 of the first intermediate relay and the first opening contact 15 of the third intermediate relay. The other end of the winding 1 of the magnetic starter is connected to the other end of the first break contact

15 of the third intermediate relay, another winding terminal 9 of the second intermediate relay through the second parallel contact 6 of the first intermediate relay connected in parallel and the second disconnecting contact 16 of the third intermediate relay connected

With another output of the disconnecting contact 8 of the first intermediate relay and with one of the terminals of the second closing contact 11 of the second intermediate relay, the other output of which is connected to another output 21

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to connect the power source, another output of the disconnecting contact 12 of the second intermediate relay is connected to one of the terminals of the second closing contact of the magnetic actuator 3, the other terminal of which is connected to another output of 21 for connecting the power supply, another output of the first closing contact of the magnetic contact 2 the actuator is connected via a disconnecting contact 18 of the time relay to a common point of the first closing 5 and disconnecting 8 contacts of the first intermediate relay and the first disconnecting contact 15 of the third interval full-time relay, and the third closing contact 7 of the first intermediate relay is connected in parallel with the first closing contact 14 of the third intermediate relay.

The device works as follows.

The initial state of the winding 1 of the magnetic starter, the windings 4, 9, 13 intermediate relays and the winding 17 of the time relay are de-energized.

When one of the control buttons 19 is pressed, the winding 4 of the first intermediate relay is energized by the circuit: pin 21 - button 19 - winding 4 - pin 20. The first relay operates, opens contact 8 and closes contacts 5, 6, 7. The winding receives power 1 magnetic starter circuit: pin 21 - pins 5, 15 - winding 1 - pin 20, The starter operates and closes the block contacts 2, 3, At the same time, the starter self-locks through pins 2, 18, 15 and winding 17 time relay receives power Circuit: pin 21 - pins 3, 12 - winding 17 - pin 20, and the dwell count in Yemeni,

If the control button 19 is held down, after the time delay has elapsed, the time relay will operate and open contact 18, which will break the self-locking circuit of the magnetic starter. In this case, the magnetic starter will be turned on as long as control button 19 is pressed.

When releasing the control button 19, it loses the power of the winding 4 of the first intermediate relay, which, having turned off, opens contacts 5, 6, 7 and closes contact 8,

In this case, the winding 1 of the magnetic starter loses power, the starter turns off and opens the block contacts 2, 3. The time relay winding 17 loses power, which, having turned off, closes contact 18 and the device returns to its original state.

If, after the supply of power to the winding 17 of the time relay, release control button 19 before the time delay expires, then power up the winding 4 of the first intermediate relay, which, having turned off, will open contacts 5, 6, 7 and close contact 8. The second winding 9 will receive power intermediate relay circuit: pin 21 - contacts 2, 18, 8 ,. 16 — winding 9 — terminal 20. The second relay will operate, open contact 12 and close contacts 10, 11, self-blocking via contacts 11, 16. In this case, winding 17 of the time relay, which does not operate, loses power and the magnetic starter will remain on, because its winding will receive power through the circuit: pin 21 - pins 2, 18, 15 - winding 1 - pin 20.

The magnetic starter is disconnected by pressing again on any of the control buttons 19, moreover, since the triggering of the magnetic starter does not depend on the time delay, the Stop and Emergency Stop commands are the same. When the control button-19 is pressed, the first intermediate relay is triggered, and winding 13 of the third intermediate relay is energized in the circuit: pin 21 - contacts 7, 10 - winding 13 - pin 20, The third relay is activated, opens contacts 15, 16 and closes the contact 14, self-locking through the contacts 14, 10. The coil 1 of the magnetic starter loses power, and the second intermediate relay remains on, because the opened contact 16 of the third intermediate relay is shunted by the closed contact 6 of the first intermediate relay. When the control button 19 is released, the first intermediate relay is disconnected, and the coil 9 of the second intermediate relay loses power, which, having switched off, opens contacts 10, 11 and closes the contact 12. Loses the power winding 13 of the third

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an intermediate relay, after disconnecting which the device returns to its original state.

The time relay setting is selected from the condition that it must be slightly longer than the total time added from (the average time is indicated);

time to press the control Yu button (s);

the response time of the first intermediate relay (0.035 s);

the response time of the magnetic actuator (0.065 s); -) 5 times the operator responds to the signal of the magnetic actuator tripping (l s);

release time of the control button (0.23 sec.);

20 release time of the control button (to 0.23 s);

the return time of the first intermediate relay (g 0.04 s);

the response time of the second pro 25 inter relay (a 0.035 s).

Therefore, the time relay setting should be Ј- 1.5 s,

Thus, this device allows prompt and arbitrary 30 (depending on the needs of the technology process) to set the duration of the push function, which is determined by the time the control button is held down.

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Claims (1)

Invention Formula A device for controlling a magnetic starter that contains leads for connecting a magnetic starter winding, leads for connecting two magnetic actuator contacts, three intermediate relays with closing and opening contacts each, a time relay, closing contacts control buttons, and leads for connecting a power source, one of the terminals for connecting the winding of the magnetic actuator and one of the terminals of the windings of all intermediate relays and a time relay are combined and connected to one of the terminals for connecting neither the power source, the other terminal of the winding of the first intermediate relay through parallel-connected control buttons connected to another terminal for connecting the power source; another terminal of the winding of the third intermediate relay through the series-connected first closing contacts of the second and third interval exact relays connected to another terminal for connection the source of the power source, another winding terminal of the time relay is connected to one of the opener terminals of the second intermediate relay, one of the terminals for The first closing contact of the magnetic starter and one of the terminals of the first closing contact of the first intermediate relay are combined and connected to another terminal for connecting a power source; the other terminal of the first closing contact of the first intermediate relay is connected to the combined one of the break contact terminals of the first intermediate relay and the first disconnecting contact of the third intermediate relay, the third contact of the first intermediate relay is connected in parallel with the first closing terminal the third intermediate relay cycle, characterized in that, in order to expand the operational capabilities, the time relay is provided with a break contact having a time delay when opening, another terminal for connecting a winding the magnetic starter is connected to another output of the first disconnecting contact of the third intermediate relay, another winding output of the second intermediate relay is connected in parallel with the second closing contact of the first intermediate relay and the second disconnecting contact of the third intermediate relay is connected to another output of the first contact of the intermediate intermediate relay and one of the terminals of the second closing contact of the second intermediate relay, the other terminal of which is connected to another terminal for connecting the source pi This second output contact of the second intermediate relay is connected to one of the terminals for connecting the second closing contact of the magnetic starter, the other terminal for connecting of which is connected to another output for connecting the power source, another connecting for the first closing contact of the magnetic starter via the open time relay contact is connected to the combined terminals of the first closing and opening contacts of the first intermediate relay, and the third contact of the first weft relay is made closing.