SU578023A3 - Device for arc-safe switching of low-power ac circuits - Google Patents

Description

loads; fig. 2. electrical circuit of the preparable device.

The device contains the following elements: 1.2 - input terminals of the device; 3,4 output terminals of the device; 5 - load resistor; 6.7 - load resistor circuit switches | 8.9 - Bistab {t} Bh1e turnips with windings 10.11 and 12.13, respectively (of which 10, 12 - starting) | 14, 15 - Stop buttons; 16.17 - Zener diodes 13.19 - uncoupling diodes; 20 - ven. Tip; 21 - limiting resistor | 22,

23- contacts turnips complies with TB |

24- Start button; 25.26 conclusions.

At the same time, stable relays 8.9 with windings 10.11 and 12, 13 Stop 14, 15 buttons, 16.17 Zener diodes, isolating diodes 18, 19, terrestrial resistor 21 and Start button 24 form a control unit;

If a terminal voltage is applied to the input terminals 1.2 and the diode 18 is open, then with the button 24 turned on, the electrical circuit is closed; input terminal 2, terminal 26, Start button 24, winding 10, turnips 8, button 14 Stop (not activated), Zener diode 16, diode 18, resistor 21, pin 23 input terminal 1,

This circuit is kyets only on a certain, fuzzy section of a voltage that is limited by the ras {kicking and closing of a Vyp1uni in the form of a Zener diode of a voltage discriminator. It is there that when delaying: the starting impulse comes out of the fact that Hot start winding turnip B is excited by -elae at a positive half-wave, but mech of the head of the relay by means of the relay intersection of the load circuit, I am looking for the first line of the world, I am looking for a simple way to look for a simple connection to the turn of the wedge, Ipu a security zone during which Bozbu ki vyshonoy uiog nutym impute repom 8 returns to Sfcxoaaoe after dinner. In reaushtya pereksho chagega 7 ikE load resistor 3.zamikaye with :; only when included, c. The chain of this reistor is Vengipo 2O. It is in the locked state. If there is a delay in the start-up element, then due to the turn-on delay of turnip 8, the switching-on element of the switching device does not include: because of the open contact 22. Start occurs only at the next half-wave of the same poprnostv, and then excitation of ne 8 begins , So; that the relay switches on time. With turnips in 8, the switch 7 of the load resistor circuit 5 closes. This happens without

of torus 5, since to terminal 2 you have applied a positive signal and a valve 2 O is locked

 .After closing} {and switch 7, the pull-up resistor circuit is prepared for the next reverse-polarity half-wave. During the duration of this half-wave, applied with a positive voltage to the input terminal 1, the valve 20 is open, and since the load resistor circuit through the converter 7 of the resistor circuit is already closed, it is possible to close the switch 6 of the circuit.

This closure of the load resistor circuit switch 6 occurs due to the excitation of the starting winding 12 of the relay 9. This forms an electrical circuit: input terminal 1, pin 25, boundary resistor 21, diode 19, Zenar diode 17, button 15 Stop (not activated) winding 12 relay 9, closed contact 22, button 24 Start, output 26, input terminal 2. Thus, the load resistor circuit 5 closes the resistor 5.

If depicted in FIG. 1 the load resistor circuit must be open, first of all during the corresponding half-wave of the supply voltage, the load resistor circuit switch 6 opens, and the resistor circuit switch 7 opens after the action of the reverse polarity half-wave. that the Stop buttons are actuated by several or more spring-loaded sets. Since GOSONACT 23 is open, only the winding 13 of the relay 9 is temporarily triggered (during the wavelength for which the diode 19 is open with the open).

The current direction is as follows: pin 1, pin 25, resistor 21, diode 19, diode 17, x step 15 Stop, winding 13 turnips 9 - button 24 Start, sign 26, terminal 2 “One-time interrupt with load resistor circuit switch 23 and also returns to the quiescent state and prepares the relay 8. At the next half-wave, the voltage of the opposite polarity; relay; 8 also returns to its outgoing position.

; : .HanpaBTieiffle current becomes as follows: pin 2, pin 26, button 24 Start, pin 23, winding 11, relay 8, button 14 Start, diode 16 Zener, diode 18, resistor 21, pin 25, terminal 1. This also opens controlled relay 8 switch 7 of the load resistor circuit. This happens without a resistor 5, as the valve 2O is locked. Pin 22 also returns to the quiescent state, and the switching device again takes the starting position.

Claims (1)

Invention Formula An apparatus for bezdugovoy switching malomosch} first alternating current circuits comprising pospeiovatelno vkgaocheknye first perekgaochatep and uncontrolled eAShy valve, shunt second perekshochatepem, and a control unit with two bistable relay having a coil, one of which pusKOBaHj decoupling diodes and buttons, characterized in that with a chain of increased reliability by ensuring the functioning of both pereshogagley under different conditions of ventilation, control unit; additionally equipped with Zener, with each dna 38: a hera oshm electrode is connected to the corresponding decoupling diode, and the druptm via the Stop button is connected to the start winding of the active bistable pens. Sources of information taken into account during the examination :, 1, Low voltage apparatus. MaloamnepHbie vykgaachatepi and rekatachegga Svods 1st catalog of the department VNIIEM on scientific and technological information1№ 6, 2, Patent of France No. 1208626, cl. H Oi H, 1965. 3, US Patent No. ZZVEU kp. ZO7-134, 1970. f @ W. g