DE442850C - Multipole electromagnetic overcurrent rotary switch with trip-free release and magnetic spark extinction - Google Patents

Description

The invention relates to a multipole electromagnetic overcurrent rotary switch with trip-free release "and magnetic spark extinction. The essence of the invention is that a number corresponding to the number of switching contact pairs on the Leg of a Ε-magnet of a series of insulating bodies made of refractory material are provided is, which have chambers for ίο the switching contact pairs on their upper side; these sit to square nested and in the same way with the latch plate coupled to the middle magnet leg Freely rotatable switching stars set angular contact frames.

The invention is characterized by the peculiar structure of the switch, whose Individual parts by simply plugging one another without the aid of special fastening. -Ao medium to get a solid cohesion and quickly put together and taken apart can be. It also offers the guarantee that the mechanical and magnetic parts against the Switching lights are so protected that it is impossible to damage them.

On the drawing is an embodiment of the invention in Figs. 1 to 6 explained in more detail.

In Fig. Ι is a. two-pole switch shown, in which the poles are arranged one above the other. In the lower base plate .4 the magnet coil / for the maximum magnet F ¹ and F ^{2 is} arranged. The base plates A and A ¹ are made of fire-proof insulating material. The coil / is embedded in the base plate A in a spark-proof manner and secured against the switching beacon. The maximum magnet can be seen in Fig. 4, in which the switching parts have been left out for a better overview. The maximum magnet consists of the three legs F, F ¹ and F ² and is held together on the lower side by the magnetic yoke G. The armature L is arranged on the central polar axis F. The maximum magnet is therefore a so-called Ε magnet. The armature L is under the influence of a return spring and is attracted at a certain overcurrent.

On the central pole axis / ⁷ , which is used as the actuation axis for the switching poles, the switching stars B and B ¹ sit loosely. The star switches B and B ¹ intermesh by square edges and in this way form a rigid link. The upper star switch B ¹ engages with the upper square in the pawl plate O, so that the pawl plate O and the two star switches B ¹ and B ^{2 are to be} regarded as a rigid link. These three parts move loosely on the axis / ⁷ . The driver cam T ¹ , which acts on the pawl plate O via a pawl arrangement in a known design, is firmly connected to the axle / ^7. The pawl arrangement is shown in Fig. 5. The individual pawls are firmly connected to the pawl plate O. In the on position of the switch, the pawl system with the pawl plate O is held by the support pawl S. So when the armature L is magnetically attracted, a release pin W strikes against the last pawl S ¹ and opens the pawl system so that it collapses and is brought into the disengaged position by the return spring U. Since the star switches B and B ^{1 are} rigidly connected to the pawl plate O, they and the contact brushes attached to them make the switch-off movement with them. In Fig. 6 it is shown how the switching stars B and B ¹ interlock.

On the switching steni? and B ¹ sits the contact system D (Fig. 2). The switch-off

Claims (5)

position D ^{1 of} the contact system is shown in dotted lines. The contact system consists of a square metal socket C, which is pushed loosely onto the switch stems .8 and B ^1. The contact brushes D are then attached to the metal socket C. There is a protective ring around the outer metal bushing /? made of insulating material, which is partially slotted ίο at the exit points of the brushes so that the outer brush holder is shielded from the stationary contact part in the switched-off position. In Fig. Ι the protective rings made of insulating material are denoted by R and R ^1. A further isolated shielding of one pole from the other is achieved by the end disks Q and Q ¹ (Fig. 1), so that the contact carrier and the contact system are generally arranged completely in an insulating chamber. In Fig. 3 the arrangement of the isolated shielding by R and T? ¹ , Q and Q ¹ can be seen. The insulating parts just mentioned make the switching movement of the switching stars B and B ¹ with. The upper part of the pawl plate O is round at the point where the driver cam T ¹ engages, so that the driver cam T ¹ in the pawl plate O is only guided. The two base plates A and A ¹ are held together by the clamping plate K. Between the clamping plate K and the base plate .4 ^{1 there} is also an insulating plate P in order to have a well-insulated shielding effect against the earthed parts. The magnetic legs F ¹ and ^{F 2} are also completely embedded in insulating material. On the two; Magnet legs F ¹ and F- the pressure plate K is pushed and held together by clamping nuts' X ¹ , X ^{2 of} the two magnet legs F ¹ and F ^s :. The support pawl 5 is mounted on the fixed clamping plate K. 1 The base plates A and A ¹ have versions M on the _ j th sides so that the switching light [can come out of the switching chamber to the outside. Fixedly connected to the latch plate, the indicator disc is O N. This disc does consequently the switching movement of the clinker j kensystems and specify the respective position of the built-in switching chambers; Contact systems to the outside world. To this; The purpose is the viewing hole S ³ in the cap of the I. Switch provided. j Constrictions V ¹ and V ^{2 are} provided on the two magnetic legs F ¹ and F ² j in order to achieve magnetic throttling at the constrictions so that a stray field arises at these points i after the mean PoIF. The constrictions V ¹ and V ² are located in the planes of the individual contact elements per pole, so that a magnetic stray field arises at each interruption point per pole, through which the switching-off contacts must pass. In Fig. 4 of the drawings, the stray field at the points V ¹ and V ² is indicated ώι'λ some strokes. In Figs. 1 to 6 only schematic embodiments are shown, but still allow various other solutions in connection with the principle mentioned. Of course the switch can also be implemented as a single-pole switch. IΆ ι ι ·: ν τ λ ν S ΙΊ < i; c: 1-1 ε: ι. Multipole electromagnetic overcurrent rotary switch with trip-free release and magnetic spark extinction, characterized by a number of insulating bodies (A, A ¹ ) made of refractory material in a row on the legs of a Ε magnet (F, F ¹ , F-) corresponding to the number of switching contact pairs Upper side arranged chambers for the switching contact pairs, which sit on angular contact frames (C) placed on square contact frames (B, B ¹ ) that can be plugged into one another and are coupled to the latch plate (O) in the same way and are freely rotatable around the central magnet leg (F). 2. Overcurrent rotary switch according to claim i, characterized in that the lower insulator (^ 4) also on his Underside has a chamber in which the magnet coil (/) is shielded. 3. Overcurrent rotary switch according to claim ι and 2, characterized in that the two outer legs (F ¹ , F ² ) of the Ε magnet in the plane of the switching chambers constrictions (V, V ¹ ) . 4. Overcurrent rotary switch according to claim ι to 3, characterized in that the contact frame (C, C ¹ ) · within their chambers of on the rotary stars (B, B ¹ ) seated insulating rings (R, R ¹ ) with supported thereon, the contact frame space and the switching chamber are enclosed above insulating washers (Q, Q ¹ ) which are particularly shielding. 5. Overcurrent rotary switch according to An-Spruch ι to 4, characterized in that the switching chambers are provided at the interruption points with outwardly leading channels (M) . 1 sheet of drawings.