SU560782A1 - Switching device for coded track circuit - Google Patents

Description

(54) COMMUNICATING DEVICE FOR CODE RAIL CHAIN

the power supply source 4 and the other are the power circuit of the triac 5. The power supply of the triac 5 includes the power supply 4, the receiver 6 and the closing contact of the switching contact 3 of the turn-off control, the disconnecting contact of which is also connected to the power supply 4. In the control circuit of the simisgore 5 is included the closing contact 1 of the control turnip. The closing contact of the switching contact 1 of the relay 1 is connected to the power circuit of the triac 5 on the side of the source 4 of the power supply and the closing contact of the switching contact .3 to turnip 3, and the opening contact of the relay shunts the secondary winding of the relay 3 control. Resistors 7, 8, 9. 10 are used for normal operation of the device.

In the initial state, when switching the switching device into the circuit of the feed end of the track circuit at the instant of the open state of contact 2, relays 1 and turnip 3 are not excited and triac 5 is closed. The power supply circuit of the receiver 6 is open by a triac 5 and pins 1 and 3. Repeat 3 Control receives power from the power source 4 through one of the windings through a resistor 8, pin 3 | and resistor 9, but not energized, since the amperages of this winding are insufficient for its

triggered. Another winding of this relay is shunted by the break contact 1 of control relay 1.

When the contact 2 is closed, the control relay 1 is activated, which by its contact Ij removes the shunt from the second winding of the relay 3 control. If the triac 5 is healthy, then the relay 3 control receives power from the first winding. As a result of the addition of the amp turns of both windings, the relay 3 attracts its measles and connects with the contact 3 receiver b and the load.

Contact 1 closes the control circuit of the triac 5, which opens and turns on the power to the load (receiver 6). The contact system of the relay 1 is adjusted so that the gaps between contacts l, j are larger than between contacts 1, therefore contact 1 is closed when the triac 5 turns on the power supply of the receiver 6. Eros of this contact when there is no closure. After the closure of contact 1 of relay 1, current is supplied to the load through this contact.

When the pulse is opened by a triac 5, the first winding of the relay 3 of the control switch is bypassed, which does not release its measles, as it continues to receive power through the second winding of the current, more than its ampere-turn release.

Opening contact 2 causes the relay 1 to turn off. As a result, initially contact 1- is opened, with a triac 5 open, and then a triac control circuit 3 with pin 1. Triac

5 closes and turns off the power to the receiver 6.

Thus, the circuit is switched by the triac 5 at the most unfavorable moments — the short and the short — and current is passed through the contact {. Electrical wear of this contact is completely eliminated.

During the code interval of the second winding of the control relay 3, it is shunted by pin 1, but it continues to receive power from the first winding, since the triac is closed. In the future, with a serviceable simistor 5. the transmission of any code signal is similar. In this case, the relay 3 holds the measles alternately on the first, then on the second windings, and the switching process is performed as described above.

If the triac is damaged (short circuit of the power circuit) in the first interval, both windings of the relay 3 are simultaneously shunted - the first faulty triac 5, and the second - by pin 1.

Relay 3 releases measles and contacts 3 turns off triac 5. Receiver circuit

6 continues to be switched only with contacts 1. Until the damage is eliminated, relay 3 cannot be excited, so

as the power turns, only the second winding is not sufficient to trigger it. Switching the circuit of the receiver 6 will automatically continue with contacts 1.2 of relay 1 if the triac's power circuit is broken. With

1 "relay 1" damage to the amplified contacts (for example, a break in the contact spring or not closing the contacts) switching circuit will be a triac.

The resistor 9 serves to automatically energize the relay 3 when the device is turned on in the circuit, and it excludes a short circuit of the power source in case of a triac damage. With the help of resistors 7 and 9, the operating mode of the relay 3 is regulated. The resistor 10 provides the necessary control current of the triac 5.

F

formula of the invention

A switching device for a coded track circuit containing a control relay, in the power supply circuit of which the closure contact of the code track trans is connected

Miter, turnip controp, one winding of which is connected to a power source, and the other - a symistor circuit, which includes a power source, a receiver and a switch, a disconnecting contact connected to the power source, and an interrupting switch is connected to the control circuit of the triac a control relay contact, characterized in that, in order to increase the reliability of its operation, the control relay closing contact

connected to the power circuit of the triac on the side of the power supply and the closing contact of the control relay, and the disconnecting one. schuntiruet control relay secondary winding.

Sources of information taken into account in the examination:

1.SSSR, Journal, Automation, Telemechanics and Communication, 1O, 1973

2. USSR, Journal, Automation, Remote Control and Communication 9, 1967