DE1588650C - Electromagnetic release with time delay for a circuit breaker - Google Patents

Description

3 4

The tube of the trigger in the switch housing represents acted force. If the current continues for a longer period of time, the magnetic core 45 moves further in _FIG. 6 is a partial section showing the arrangement in the direction of the magnetic core 50 with the slow Geier coil of the trigger in the switch housing. speed, as the liquid in the tube 40 dampens the movement of the magnetic core 45 in one of two housing halves 5. If the existing self-switch housing housed magnetic core 45 and magnetic core 50 against each other. 1 and 2). Its coil 25 is touching one end with tig, they act as the only core and are: iner connection terminal 16 by a conductor 26 with increasing force round to the upper end of the frame. The other end of the spool 25 is pulled through a 60.

“Pus 27 with a fixed end of a spring 30 ver io To the sequence of the sequences under the action

round, which carries a movable contact piece 33, to show a prolonged overload, are

ias with a fixed contact piece 35 combine the two variable air gaps according to FIG

.effects. F i g. 3 labeled A and B and there are

In the interior of the coil 25, a tube 40 is arranged for it to have values that approximate those values

■ jet, which is movable in a 15 provided in the housing that corresponds to an existing magnetic

Slideway is guided. The tube 40 consists of a system that has been established. To close the air

It is made of non-magnetic material and has a lower gap A , the magnetic core 50 must absorb the force of the spring

, closed end 43 and an upper end that 47 and that of the viscous liquid in the tube

i is pushed in. In the pipe there is a liquid-moving resistance overcome. Closing the

<already available. 20. Air gap B requires moving the extension

The interior of the tube 40 has a flow 75 of the lever 70 through the tube 40, in order to

, igkeit, e.g. oil, slidingly arranged cylindrical at 70 for turning and thus for releasing the

vlagnetkern 45 on. The magnetic core 45 is to be brought with a switch. In the embodiment shown

iiohrung provided in which the lower end of a spring rurigsbeispiel the invention, the air gap A has a

47 intervenes. 35 size of about 8 mm and the air gap B such a

At the upper end of the tube 40 is a magnetic core of about 2.5 mm. To close the air gap Λ is

50 attached, which seals the tube 40 towards the top. a force of 30 g is required, and in order to

The coil 25 is to move enough within a magnetizable yoke 75 until this

Arranged in the U-shaped frame 60, the lower switch of which triggers, a force of 70 g is necessary.

Leg has a circular opening 61, in 30 The maximum attraction that the magnetic

ler the tube 40 can slide freely. The upper thigh system can develop is 150 g. Fig. 4 shows

has a hole 62 through which an extension 75 the corresponding working curve. It is required that

jines lever 70 protrudes, the upper end of which does not place the device under a load of 100%

of the tube 40 can be brought into contact. Rated value trips, but must trip at 125%. So

The coil 25 is by three projections 161, 162, 35 must be in the switch according to the invention of the Ma-

163 of the housing held (Fig. 6). The tube 40 protrudes very close to 100% of its nominal load.

Move over the coil 25 and the frame 60 over a large amount and must have a pull of at least

out part of its length. Ensure in the corresponding 70 g at 125% of this load.

Zone are three guide ribs 64, 65 and 66 (Fig. 5) As the curve shows, the force is at the beginning of the

arranged, between which the pipe 40 to 4 ° displacement at an overload of 125%> only 10 g,

can move freely over a limited length. namely because the magnetic core 45 is almost

The switch is triggered when the actuator is completely outside the coil. This ma-

Extension 75 of the lever 70 through the tube 40, the gnet core 45 moves slowly against the force

outwards from the position according to FIG. 1 in the position of the spring 47 and against the friction of the liquid,

according to FIG. 2 is moved. 45 until a force of 30 g comes into effect, which

In the on position of the switch (Fig. 1) it is sufficient to close the air gap / i. The magnet-

the magnetic core 45 opposite the center of the magnetic core 45 and the magnetic core 50 then act as a ma-

electrical field in the axial direction of the coil 25 is a mechanical unit. The thrust of 30 g, that of that

ben. Likewise, the magnetic core 50 lies outside the magnetic core 45 is exercised when this is on

Center of the coil 25. 5 ° to move the magnetic core 50 is on a

When an overcurrent occurs, the Ma-Arm 72 of the lever 70 are transmitted. Since 70 g is required

gnetkerne 45 and 50 under the influence of are borrowed to trigger the switch, the process runs

Coil 25 generated magnetic field in the middle extension 75 back only by the value that the elastic

the coil pulled, although only the core rate of the arm 72 corresponds. Because of this elastic

45 can move upwards, since the core 50 at a 55 deformation (Fig. 4), the air gap B is reduced.

Downward movement due to its connection with the fact that the force of attraction between

The tube 40 seated on the housing base goes to the end of the magnetic core 50 and the upper one

that is. In the case of brief overcurrents, legs of the frame 60 can be inversely proportional

In any case, the magnetic core 50 has no effect on the square of the size of the air gap, the increase

Exercise extension 75, as it increases rapidly under an opposing curve until the force of 70 g is reached,

set directed by the magnetic field of the coil, which is necessary for triggering.

1 sheet of drawings

Claims (1)

1 2 the magnetic field generated by the magnetic coil. hold, for which purpose the spring force is measured accordingly is. If an overload occurs, this Electromagnetic release with time delay spring force that locks itself out as a result of the overload for an auto switch, with a magnetic field strengthening within 5 being overcome and the measure Magnetizable U-shaped frame magnet core is placed in the center of the magnetic orderly magnetic coil and with an armature, the field is drawn and thus the magnetic excitation which is made of a non-magnetic material ge the magnet coil increases considerably, whereby a formed tube with two movable, at a distance further anchors or core is tightened, which against the force of a spring arranged magnet io the actuating means for opening the contact pieces cores of different sizes, whose triggers. This trigger also has a delay center of mass different distance tion of the triggering essentially only by one of the going through the center of the magnet coil damping means in the non-magnetic tube Have transverse axis, characterized by it and there are also marked out because of a constantly, that the magnetic core (50) with the 15 existing air gap during the core movement at a smaller distance from the transverse axis of the coil given. Core mass relatively many magnet coils (25) firmly connected to the tube (40) and the windings to generate a sufficient trigger magnetic core (45) required with the greater distance of sekraft. the transverse axis of the coil in the tube (40) against the Effect of the spring (47) is displaceable. 20 delay effect of a trigger of the above ge called type and with a low number of solenoid turns a sufficient release to achieve strength. According to the invention, this object is thereby achieved solves that the magnetic core with the smaller distance The invention relates to an electromagnetic vertically from the transverse axis of the coil with the pipe Trigger with time delay for a self-tie and the magnetic core with the larger switch, with a within a magnetizable stand of the transverse axis of the coil in the tube against the U-shaped frame arranged magnet coil and action of the spring is displaceable. Based on these with an armature, which is made from a non-magnetic training, causes at the beginning of an overshoot Material formed tube with two moveable load state the two magnetic cores opposite one another try to center what is to be ordered at a distance against the force of a spring on the transverse axis of the coil Magnetic cores of different sizes suggests that the one with the non-magnetic tube exists, whose centers of mass have different bonded nuclei during this first time period The distance from the direction through the center of the magnet coil is not in the tripping direction, but in the opposite direction Have transverse axis. the direction is pulled and thus a not yet In the case of a known release of this type (German patent specification 823 624 reliably prevents the desired release process), one of the two is used. Only when the core, which is movable in the non-magnetic tube, apart from a slightly freely movable other magnetic core, has come into contact with the magnetic core firmly attached to the tube with the initial inward movement, the magnetic coil flux is held in place, the one thus formed Overall core opposite and the triggering takes place exclusively through the moving transverse axis of the coil and thus opposite the zengen of the other, with the non-magnetic tube section of the magnetic field still offset on one side, firmly connected main core in the direction of the can start the triggering movement, whereby the core is still recognizable, where the triggering movement is at 45 bar that is ended from the beginning of the triggering movement on reaching the stationary core. Due to the originally existing gap between the two which is closed from the beginning of the movement of the core connected to the nichtma- kernels, whereby the permeability gnetischen tube connected core and thus the magnetic excitation is increased, releasing movement is a delay of the release only so that correspondingly large Activation or triggering is possible through a damping means between the two core forces from the combined magnetic core to the beneath, whereby a precise predetermination activation linkage can be exerted or is impaired with other face-to-face triggering. In addition, in the embodiment according to the invention, the sub-movement of the triggering exclusively causes the two magnetic cores to soak themselves into their safe potting flow and thus a sufficiently large release delay and add up in a second Zcitpeforce required, since up to the contact of the movable period to create maximum actuation forces.
Core to the stationary core, ie during the The invention will be described below with reference to the whole tripping process a magnetic Erre drawing explained in more detail. It shows
Supply impairing gap between the two 60 Fig. 1. A section through a switch according to magnetic cores is present. of the invention in the closed state of the contact In another known trigger of this type pieces, (USA.-Patent 2 890306) is a non-magnetic Fig.2 the switch in the open state of the pipe opposite to the magnet coil permanently arranged contact pieces, net and a magnetic core through an also internal 65 F i g. 3 the magnetic release of the switch,
half of the non-magnetic tube arranged spi- Fig.4 a path-force curve of the magnetic ralfeder with a normal current flow through the release according to FIG. 3,
the solenoid outside the center of FIG. 5 is a partial section showing the leadership of the