SU703869A1 - Automatic switch - Google Patents

Description

(54) AUTOMATIC W SPINNER

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The invention relates to an automatic connection with an increased switching capacity, which is ideal for building electrical networks and electric power from overcurrent and short-circuit currents.

In connection with the tendency of increasing power consumption in electric circuits: short-circuit currents also grow. For reliable operation of networks from large currents to the main hall, you can use switches with T9Coograi c. by.,, - /, - ..; .. ;;.: ..; ./ -: Circuit breakers are known in which electrodynamic repulsion forces are used to limit the above currents when the short-circuit current flows through: parallel current-carrying plates , iSuitsch coytacts 11.

The disadvantage of the dynaps of the switches is the absence of fixation of the movable contact after it has been thrown off by the lectchadhi by amichesky forces. Because of this, the welding of the coitaxi is possible.

when they re-clogging due to a decrease in the load.

The prototype of the inventions is a circuit breaker, the preliminary contact of which occurs under the action of electrodynamic cells of repulsive forces arising from the passage of the eye of a short clamp over two

0 parallel contact holder, which is movable and non-flexible, with a spring support mounted on the support arm of the crawler 5.

five

However, such an automatic switch is required by the operator’s tea to remove the mobile contact holder from the seat and this, in turn, reduces reliability and complicates

0 design.

 The aim of the invention is to increase the reliability of the switch and the up-. His Krish Instructions.

For this, the latch is made of

Claims (2)

5 ferromagnetic material and ipacno laid in itpOdKOcT, ne | pOD. Flatness of the twelve contacts, so that nOBPjpoT it for fixing the movable koHTdKTpderder in the rejected position, appears under the action of the electromagnetic field, and the return to the initial position under the action of the spring. ...,. ,,, ..,. The protrusion of the latch may be made of an insulating material and is positioned so that the fixing of the movable contact holder in the rejected position is carried out by said protrusion. Figure 1 shows the proposed automatic drawer, section; figure 2 is a fixed contact holder with a fixed latch. The circuit breaker is assembled in housing 1, closed by cover 2, and consists of a fixed contact holder 3, movably 1 contact feeder 4, arc chamber 5, control mechanism 6, overcurrent release 7. The fixed and movable contact holders, bearing on pins 8 and 9, are parallel to each other at their greatest length and form a loop loop. The movable contact holder is articulated and can rotate without actuating the control mechanism b. The contact pressure is provided by the spring 10. The movable contactors of 4 different poles are interconnected by an isolated cross bar 11 And are connected via a control mechanism with the handle 12 of the switch. The current passes over the fixed 3 and the moving 4 contact holders in opposite directions, resulting in the appearance of electrodynamic forces, which tend to dislodge the moving contact holder. The automatic switch works as the next drive. When an overload or short-circuit current passes through the protected circuit, the releases 7 maximize the current on frame rail 13 and turn it counter-clockwise. At the same time, the release lever of the control mechanism 6 is released. Under the action of the spring 15, the levers 16 and 17 of the control mechanism break, providing a momentary opening of the contacts 8 and 9. When a short-circuit break occurs in the protected circuit that exceeds the electrodynamic switch setting, the movable contact holder 4, under the action of electrodynamic forces, is rejected before the control mechanism 6 is activated under the action of maximum current dispersers, thereby limiting the current, the passage of 1ii through the switch. To prevent re-closure of contacts when current decreases to. actuation of the control mechanism is a latch 18 of ferromagnetic material, mounted on a fixed contact holder at each pole of the switch. The latch has an arm of insulating material 19 and rotates on the axis 20 in the direction of the contacts under the action of an electromagnetic field, and returns to its initial position after the control mechanism of the switch and the current disappears in it - under the action of a return spring 21. Invention 1. The automatic switch, the preliminary opening of the contacts of which occurs under the action of electrodynamic repulsive forces arising during the flow of a short circuit current along two parallel contact-holders moving ohm and fixed, with a spring-loaded rotary latch fixed on the fixed contact holder with a protrusion fixing the rejected position of the movable contact holder, from l and h m and so that, in order to increase reliability and simplify the design, the rotary latch is made of ferromagnetic material and is located in a plane perpendicular to the plane of movement of the contacts, so that the rotation of the latch for the fictions of the movable contact holder in the thrown position occurs under the action of an electromagnetic field, but. return to the original position - by the action of the spring. 2. Automatic circuit breaker .P.P.1, characterized in that the protrusion of the latch is made of insulating material and is arranged so that the fixing of the movable contact-holder in the opened position is performed by said protrusion. Sources of information taken into account in the examination 1.Patent .. US No. 3764946, cl. H 01 H 77/10, 1967. 2. The copyright certificate number 116138, class H 01 H 77 / 10,1958. ten lit 13 J g / TH / 2.2