SU402957A1 - TIME RELAY - Google Patents

Description

one

The invention relates to the field of automation and is intended for the sequential switching on for a certain time of ferroresonance relays, which, in turn, are controlled by various actuating devices of the automation (relays, valves, lighting equipment, etc.) using pulse switching devices, such as smoldering thyratrons bit

A time relay is known that contains ferroresonance relays made on double-wired throttle and capacitors and nodes connected to an AC source through a common capacitor, thyratrons, and an RC clock circuit.

However, the known device does not ensure the inclusion of ferroresonant relays for a certain time in a certain sequence, i.e., it does not allow the creation of a program of time delays.

In order to improve the reliability and accuracy of the proposed time relay, the secondary windings of double-winding chokes, ferroresonant relays are connected to cathodes of thyratrons, the anodes of which are connected via diodes to an AC source, the grids of thyratrons are connected to capacitors of the time setting RC circuits, and parallel to the secondary windings of double-windings chokes through other diodes connected smoothing capacitors. In the drawing given the proposed device.

The proposed relay includes ferroresonance relays, consisting of two-winding chokes 1, 2 and 3, connected in series with the primary windings of these chokes, capacitors 4, 5 and 6, a common capacitor 7 through which the ferroresonant relays are connected to AC mains, and tiratrons 8 -11, semiconductor codes 12-17 and time specifying RC-depi, consisting of a resistor 18, a capacitor 19, a resistor

20, a capacitor 21, a resistor 22, and a capacitor 23.

In the proposed device, three ferroresonant relays are powered from one source through a common capacitor 7, the value of which is chosen so that the voltage at the terminals of the resonant circuits is less than the voltage at which the relay spontaneously enters into resonance, and when two ferroresonant relays are activated, the voltage

becomes less off voltage. Thus, all relays are always in the off state or one relay is on. The state in which two relays are simultaneously in the on position is excluded.