DE455569C - Overhead line switch - Google Patents

Description

Overhead line switch The invention relates to overhead line switches, where the switch blade is carried by an insulator that sits between the two fixed post insulators carrying the lines are rotatably arranged. Such a Switch is shown in Fig.i, where il and i2 are the outer post insulators, where the lines are tensioned, and where i3 is the central rotatable isolator is who carries the switch knife m. It is known that such overhead line switches freeze in frost, making switching on and off difficult, if not impossible is made.

The invention relates to an arrangement of these switches in which loosened the knife in a known manner in the contacts before switching off so that switching off is facilitated. The invention consists in that the switch blade can move against the rotary isolator.

In Figs. 2 to 5 are some embodiments of such a switch shown.

In Fig. 2 the switch blade is in on the rotary isolator i3 around the pin z rotatably mounted. If the switch is to be turned off, it becomes the rotary isolator i3 rotated clockwise, the pin z describes an arc around the contact k2 of the fixed insulator i2. During this rotation, the knife moves out of contact ki at the isolator i, bew, -gt. This switching movement is only a relatively small one Force required because the contact on the left side at i2 has not yet opened will. As the insulator i3 continues to rotate, the knife m rests against the stop ai which is attached to the isolator i3, and now with further rotation of the Isolator i3 the switch blade also detached from the contact k2. With this arrangement the eccentric pivot point of the switch knife lies on the longitudinal axis of the knife.

Fig. 3 shows an arrangement in which the switch knife on the Rotary isolator can be rotated eccentrically and is longitudinally displaceable against it. The cone z on the rotary isolator around which the knife can rotate is outside the Longitudinal axis of the knife. Is used for the purpose of switching off the isolator i3 clockwise rotated, the knife m can first make a longitudinal shift to the right, in which the knife is drawn deeper into contact ki and out of contact k2 will. Then the knife is pressed against the stop a1 and with further rotation the switch blade from the contacts k. and solved it. This arrangement has the advantage that the movement of the knife, since large translation can be applied; with relatively great forces.

With the arrangements according to 'Fig. Q. and 5 is the switch knife in two Knife divided, and each of these parts is eccentric on the Rotary isolator i3 stored. At the start of the switch-off movement, for example, the pin moves z1 on an arc around the contact k1, and so the kinks with this movement Ice cream. As soon as the knife ml has reached the punctured position, it comes to rest on his one end against the stop a1, and now the knife is pushed out of the contact k1. The same process takes place on contact k2 with the knife ma, with the arrangement According to Fig. 6, the pins z1 and x2 lie outside the connecting lines between the two Contacts k1 and k2. When turned to the right, this will be used for the purpose of switching off the contacts ml and m2 are loosened in the direction of their longitudinal axis, and only when this has happened will the stops a1 and a2 take the knives ml and m2 in an arc around the axis of rotation of the isolator i3.

So that the position of the switch blade when switched off on the Rotary isolator is set, a spring is attached to the rotary isolator, which the switch blade presses against a stop on the insulator, by means of which the Knife is pressed into the contacts when switching on. These stops are denoted by a3 in Figs. 2 to g.

Claims (7)

PATENT CLAIMS: i. Overhead line switch in which the switch blade is attached to an insulator between the two the contact pieces and connecting lines supporting fixed post insulators is rotatably arranged about its central axis, thereby characterized in that the switch blade is movable against the rotary isolator. 2. Overhead line switch according to claim i, characterized in that the switch blade is on the rotary isolator is eccentric rotatable. 3. Overhead line switch according to claim 2, characterized in that that the eccentric pivot point of the switch knife on the longitudinal axis of the knife lies and that at the beginning of the switch-off movement, the knife acts as a one-armed lever rotates around one contact while pushing it out of the other contact, and that the knife with further rotation of the rotary isolator by a stop on Isolator takes part in the rotary movement. q .. Overhead line switch according to claim i, characterized in that the switch blade is eccentric on the rotary isolator is rotatable and longitudinally displaceable against him. - 5. Overhead line sc7ialter- according to claim q., characterized in that the switch blade on the insulator around a point is eccentrically mounted, which lies outside the longitudinal axis of the knife, so that the knife initially experiences a longitudinal displacement at the start of the switch-off movement and then pressed out of the contacts by means of a stop on the insulator and takes part in the rotation of the rotary isolator. 6. Overhead line switch according to claim i, characterized in that the switch knife is divided into two knives, of each part is mounted eccentrically on the rotary isolator. 7. Overhead line switch according to claim 2, ¢ and 6, characterized `by a spring, which the knife after Solution presses from the contacts against a stop on the rotary isolator, by means of whose when switching on the knife is pressed into the contacts.