SU422050A1 - TIME RELAY - Google Patents

Description

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The invention relates to half-water time relays and can be HCHoribsoaaHtJ in electrical devices for various purposes.

A time relay is known that contains a bridge circuit, two adjacent elixes of which form a time given by 1, a U / C circuit. and the other two arms are a voltage divider, with a zero-organ in one diagonal and a capacitor / C-filter in another diagonal, an output thyristor and a thyristor shunting the bridge circuit after working off the time delay.

The low reliability of operation of such a time relay is due to the dependence of mon.1, the stability and duration of the emulsion on the output of the null organ on the variation of the parameters of the relay elements.

The purpose of the invention is to demonstrate the reliability of the time relay operation.

This is achieved by the fact that the cathode of the thyristor, which Ivuitiruyuschego bridge circuit during the working time delay, is connected to the control electrode of the output thyristor, n the anode through a resistor to the capacitor fi: 1ytra.

The drawing shows a schematic diagram of a time relay.

The time relay contains a bridge circuit, two adjacent elixes of which form a master / C-circuit time, consisting of a resistor / and a capacitor 2, two other arms - a divider on; 1p of the resistors, 3, 4. In one diagonal The transistors 5, 6 are assembled, in another diagonal there is a 7 / C-filter capacitor formed by a capacitor and resistors 8, 9. the thyristor 10, the resistor 11, the output thyristor 12 and the resistor 13 serving as a voltage. The thyristor kagod 10, shunting bridges to) the circuit after testing the Yeremo shutter speed;, is connected to the control electrode of the output thyristor 12, and the anode is connected through a resistor i to the 7 / C filter cond.

When the supply voltage is applied, the 2 H 7 capacitors are charged. The constant charge time / C-zein is incommensurately of the C-filler time, so the capacitor 7 is charged significantly faster than the capacitor 2 on the caMoii low exposure setting jipcMCHi. As long as the potential is:; ial at the connection point;: the resi and the capacitor RC-iiQ-.m; and the sweaty ala at the common point; the commonpain 1eistop; u5 o and the voltage divider, trans.: Constants 5, C and thyristors 10 , 12 are in locked state. When the potentials at the reference points are compared, the transistors 5. 6 are opened. The zero-organ and the capacitor 2 is discharged but the fines: open transistors 5, 6, resistor //. thyristor control elecrod-cathode transition 10 and successively with it

the control electrode-cathode transition of the thyristor 12. The energy of the capacitor 2 is enough to unlock the thyristor 10, o may not be enough to unlock the thyristor 12.

When the thyristor 10 is unlocked. The capacitor 7 is discharged along the circuit: a resistor 8, an anode-cathode of an open thyristor 10, and an usb transfer. the capacitor 7 is charged to a voltage greater than the voltage on the capacitor 2, and its capacitance is several times greater than the capacitance of the capacitor 2.

When the thyristor 12 is unlocked, the load (resistor 13) is connected to a power source. The thyristor 10 remains open due to the current flowing from the power source through the resistor 9, and continues to shunt the capacitor 7 until the power source is disconnected. This ensures zero potentials of the capacitors 7 and 2 and the high availability of the relay for re-action.

Subject invention

A time relay containing a bridge circuit, the two adjacent arms of which form

the time of the master / C-circuit, and the other two arms are a voltage divider, with a zero-organ in one diagonal and a capacitor of an RC filter in another, a single thyristor and a thyristor shunting the bridge circuit after working off the time delay, which are different: M, that, in order to increase the reliability of operation, the cathode of the thyristor shunting the bridge circuit after testing the time delay is connected to the control electrode of the output thyristor, and the anode through a resistor to the filter capacitor.

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