SU500550A1 - Time relay - Google Patents

Description

The invention relates to a pulse technique and can be used in automation, telemechanics and communication devices.

A time relay is known, which contains the meteor poles of the power source, the time of the air flow P C, the null organ connected by the input to the output, the first and second output thyristors with loads, the transistor whose emitter is connected to the negative pole of the power source, and the collector is fed ignition of the NIN to the control electrode of the second output thyristor, connected in parallel; 1b ". yo the first output thyristor is a series circuit of a capacitor and a diode.

 However, the well-known BpeMefm relay has insufficient time accuracy due to the onset of time, since when the first output is on. the thyristor occurs a short-term incomplete unlocking of the second output clock.

The purpose of the invention is to improve the accuracy of time delay.

For this, the diode anode is connected to the anode of the first output shooting gallery. Ztora, and the cathode directly with a capacitor and through a resistor with the base of the transistor; In addition, between the I point, the connection of the cathode of the diode with the capacitor and the resistor included in the base circuit of the transistor is connected to a stabilitron, as well as between the control electrode of the second output thyristor and the negative pole of the power source; a chain of two series-connected resistors, to the point of connection of which is a connected collector of said transistor.

At the “timeline” the circuit diagram of the relay is given.

Claims (3)

The time relay contains an RC circuit consisting of series-connected resistor 1 and ion-capacitor 2, which are generally connected to the input of the null organ 3, the first and second output T1 interfaces 4 and 5, between the anodes and the positive pole 6 of the power supply are connected respectively to load 7 and 8, between the cathodes and the input of the ul-organ capacitor 2, between the cathode and the negative pole 9 of the power supply is a diode 1O, and between the control of the electrodes and the negative capacitance 9-consistent series of resistor 11 with diode 12 and resistors 13 , 14 with a diode 15, the negative full voltage: 9 is connected to the anodes of diodes 12 and 15 and the cathode of the diode 10, the anode of which is connected to the emitter of the transistor 16. The collector of the latter is connected to the common point of resistors 13 and 14, and the base is connected through a series-connected resistor 17 and the Zener diode 18 - with a common point of the successive circuit from the capacitor 19 connected to the negative pole 9, and the diode 20 of which is connected to the anode of the Fistoror 4. The time relay works as follows, When the power supply voltage is applied d time asking its KOH-i capacitor; 2, and through the load 7chi the diode 20 is a capacitor 19. A part of the current of the diode 20 is fed through the zener diode 18 and the slab. ffop 17 into the base of the transistor 16, which is disconnected, the control circuit of the thyristor is shunt and thus prevents the unlocking of the latter when the first triac turns on; output thyristor 4. When the voltage on the capacitor 2 triggers a zero-organ tripping 3, it is decomposed through one of the transitions of the latter and the control circuit of the thyristor 4, causing the latter to turn on. When the atom capacitor 19 is discharged through the base-emitter transition of the transistor 16, holding it open for the entire time of the discharge of capacitor 2. When the discharge / capacitor 2 is again discharged, the thyristor 5 is turned on, since the discharge current is now flowing through the control transitions of both thyristors 4 and 5. The effect on pulse load 8 corresponds to the end of the time delay. In this case, the voltage on the RC circuit drops and the charge of the capacitor 2 stops, i.e. Relay is prepared for reclosing. Claim 1. A time relay containing an RC circuit connected between power supply policies, an RC circuit, a null organ connected to the output of the RC circuit, the first and second output thyristors with loads, the transistor, the emitter of which connected to the negative pole of the power source, and from the collector is supplied: the ignition voltage to the control electrode of the second output thyristor connected in series with the capacitor and parallel to the first output thyristor and: diode t. In order to improve the accuracy of the time delay, the anode of the diode is connected to the anode of the first output thyristor, and the cathode is directly connected to the capacitor via a resistor with the base of the transistor. 2. Relay according to claim 1, in accordance with the fact that between the connection point of the Kai diode and the capacitor and the resistor included in the base circuit of the transistor is -. chen strbshtron. 3. The relay according to claim 1, characterized in that between the control electrical. The house of the second output thyristor and the negative terminal of the power supply is inserted, a circuit of two series-connected systems at the junction point of which is located under the switch of the transistor of the transistor. D d u