SU838858A1 - Device for automatic reconnection - Google Patents

Description

(54) DEVICE FOR AUTOMATIC REPEATED

INCLUSIONS

one

The invention relates to electroautomatics and can be used in electrical installations with a constant operating current to control oil switches.

The closest to the proposed is an automatic reclosing device containing charge and discharge thyristors, an RC delay chain, pulse transformers and resistors 1.

However, the device has a complicated wiring diagram and an insufficiently reliable launch method. The device has no indication of the state and operation of the circuit, the use of pulse transformers reduces the reliability of the circuit.

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

The goal is achieved in that the device for automatic reclosing, containing an executive thyristor, a control capacitor with a discharge resistor, a time delay element, made on an RC circuit, decoupling diodes, resistors, and a signal element, made on cold cathode tiratrons. , a closing block-contact switch and a signal pick-up button are introduced, the control grid of the first thyratron is connected to the cathode of the executive thyristor through the first resistor and the cathode of the second thyratron of two decoupling diodes connected in series, to the junction of which is connected one of the control terminals of the capacitor, parallel to which is included the discharge resistor, a second terminal control capacitor through a diode and WTO. The resistor is connected to the thyristor control input, the signal pickup button is turned on parallel to the first thyratron, and an RC circuit is turned on parallel to the second thyratron, the connection point of the resistor

and the capacitor of which is connected to the grid of the second thyratron, and between the anode of the second thyratron and the anode of the executive thyristor the closing block contact of the switch is connected.

The drawing shows a diagram of the device.

Resistors 1 and 2, the first tiratron 3, the button 4 of the signal pickup form the alarm rectifier. The resistor 5, the second thyratron 6, the capacitor 7 form an element of time delay. The turn-on signal is removed from the resistor 8, the power supply diodes 9, 10 separate the charge and discharge circuits of the control capacitor 11, equipped with a discharge resistor 12, the executive thyristor 13, the diode 14 switch the output circuit. Resisors 15, 16, diode 17 form a thyristor control circuit. The power supply plus is supplied to terminals 18, minus to terminal 19, the output circuit is connected to terminals 20, 21. In the anode circuit of the second thyratron 6, the switching contact terminal 22 of the switch is on.

The voltage on the circuit of the device is supplied by the contact of the control key, closed in the "On" position. When the switch is turned off, the action of the relay protection of the anode circuit of the thyratron 6 is powered through pin 22, with a given time delay, a voltage pulse appears on the cathode resistor 8, which through the control capacitor 11 is fed to the input of the thyristor 13 protected from overvoltage by diode 14 When the thyristor 13 is turned on, the 11 level capacitor is pressed before the source voltage across gHepi plus the thyristor 13 — diode 10 — resistor 16. If the following tripping occurs after turning on the switch, the signal from the delay circuit is not It passes through the charged capacitance 11. This ensures that the circuit operates once. The initial state is restored in 20-25 seconds as the capacitance 11 is discharged through the resistor 12. Diodes 9, 10 dissipate the charge and control circuits. The thyratron 3 is turned on when the thyristor is triggered for the first time and remains on until the signal is released by button 4.

Using cold cathode thyratrons in a delay and signaling circuit

Strengthens the functionality of the device, increases its reliability and durability.

Claims (1)

Invention Formula An automatic reclosing device comprising an actuating thyristor, a control capacitor with a discharge resistor, a time delay element made on an RC circuit, decoupling diodes, resistors and a signal element made on cold cathode thyratrons, characterized by the purpose of enhancing the reliability of operation is that a closing block contact switch and a signal pickup button are inserted into it, and the control circuit of the first thyratron is connected to the cathode of the thyristor through the first resistor and The second thyratron diode is connected via two decoupling diodes connected in series to the connection point of which one of the control capacitor terminals is connected, in parallel with which the discharge resistor is connected, the second control capacitor terminal is connected via the diode and the second resistor is connected to the first thyratron terminal the pickup button is turned on, and an RC circuit is connected parallel to the second thyratron, the junction point of the resistor and capacitor of which is connected to the grid of the second thyratron, and between the anode torogo thyratron and the anode of the thyristor actuator included closing the auxiliary contact of the circuit breaker. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 365003, cl. And 02 H 3/06, 1977.