DE1964363A1 - Electrical switch disconnector - Google Patents

Description

Electrical Switch Disconnector The present invention relates to an electrical switch-disconnector with a movable disconnection knife and a Counter contact.

Switch disconnectors are already known, but these designs are satisfactory not, because the quick pulling apart of the moment of opening of the disconnector resulting arc and its releasable caused by it. it's very hard to realize. The extinguishing of the arc is also very difficult to achieve, since devices with disconnectors very often in the open air, alao under moisture, set up are what makes arcing easier.

The object of the invention is to remedy these disadvantages by a Switch-disconnector for high-voltage lines, which allows to pull apart and extinguish the arc in an extremely short instant and the damage and destruction of the fixed and moving parts of the circuit breaker avoided by arcing.

This object is achieved in that the rotary knife in the area its free end has a whip rod which is pivotable and conductive is mounted on the cutting knife and connected to it by means of a spring element, and the mating contact has a hook that holds the whip bar when it is closed Disconnector overlaps, and that the whip rod when closing the disconnector Pushing driver or stop parts are provided under the hook.

The whip bar can be partially sci-robbed around a be looped with the severing knife firmly connected bolt and the so formed Spring element by means of the free end of the whip rod on the trenum knife side at the beginning of the opening of the disconnector by one firmly connected to the disconnection knife Stop bolts and the hook are tightened.

Various other kena signs of finding go the end the following description of the drawing: In the drawing are three different ones Execution examples listed. 1 to 6 show a circuit breaker, in which the cutting knife is taken along by a rotatable isolator, Fig. 7 to 9 a circuit breaker in which the cutting knife is pivoted and Fig. Lo to a Disconnector, in which the disconnector 12 swings and swivels during the closing process then performs a translational movement.

Example 1 disconnector, in which the cutting knife is from a rotatable Isolator is taken: Figure 1 is a side view of such a switch-disconnector in the open position.

Figure 2 is a side view of the circuit breaker during the closing process.

Figure 3 is a side view of the closed circuit breaker.

FIG. 4 is a side view of the circuit breaker during opening and in the open position.

FIG. 5 is the view of the contact part 5 in engagement with the mating contact on a larger scale.

Si or 6 is a partial section of FIG. 5, but rotated by 900.

Figure 1 shows a triangular holder with a frame 1, in general Made of l-shaped iron, with an insulator 2 attached to its right side is, which carries a fastening part 3 at its upper part, provided with a Joint 3a around which the cutting knife 4 can pivot, which at its free end 4a a contact part 5 in the form of a staple, the role of which is explained below will have. In the middle zone of the frame 1 is a joint 6, at dec a rotatable isolator 7 is attached, which via a guide part 8 the pivoting of the cutting knife 4 accomplished. in the left side of the frame 1 is an insulator 9 attached, at the upper end of which there is a fastening part 1o that the fixed mating contact 11, with which the contact part when the disconnector is closed 5 is engaged, as well as laterally two vertical rods 12, 13, whose function is still explained, carries.

The contact part 5 at the free end of the cutting knife 4 has at one on its sides a metal whip rod 14, which is partially free around a with the contact part 5 firmly connected bolt 15 is rolled.

The cutting knife-side free end 14a of the metallic whip rod 14 comes into contact with the stop pin 16 when the disconnector is closed, which is also firmly connected to the contact part 5 15 The opened disconnector assumes the position of FIG. H. the insulator 7 holds over the driver part 8 the severing knife approximately vertical, and the whip bar 14 is over the spring coils and its correspondingly designed cutting knife-side free end 14a on the stop 20a held, when the circuit breaker is closed, the movable isolator pivots 7 in the direction of the arrow F1 (Figure 2) by means of a mechanical driver element, with also since separating knife 4 and thus the contact part 5 is pivoted, welcbcs initially between the two vertical Stailge 12, 13 is guided and then with the mating contact 11 engages. The whip rod 4, which also swings with it, is thereby by means of which is firmly connected to the guide part 8 of the movable insulator 7 Arm 17 is pressed under the hook 13a of the vertical rod 13.

When the disconnector is opened, the movable insulator 7 moves in the direction of the arrow F2 (Figure 4) rotated, the cutting knife 4 very quickly follows the movement and the contact part 5 comes out of engagement with the gene contact 11. The whip rod Slides under the hook 13a of the rod 13 for a short time until at the moment when the free end of the whip rod 14 just catches the hook 13a reached.

The lower part 14a of the whip rod 14 is in this position in abutment with the bolt 16, and therefore the turns surrounding the bolt 15, tensioned and require a strong spring force, which in a moment with an additional small movement of the cutting knife 4 due to the sudden release of the whip rod 14 is canceled by the hook 13a. Under the action of relaxation of the tense Windings and the simultaneous pivoting of the cutting knife 4 performs the whip 11S a rotation, schematically in the figure elc exceeds 200 °. This is how the electric arc that occurs when the whip rod 14 is separated from the hook 13a is suddenly drawn out for a long time and therefore disappears very quickly, without the hook 13a and the whip bar 14 being able to be damaged. Even more, there are no damage at all to the mating contact 11 and on the contact part 5, since the current only through for a certain period of time the rod 13 and through its hook 13a, the bed 14 and the cutting knife 4 flows. It is thus a switch-disconnector for high voltages for very fast disconnection created at high load, avoiding any damage or destruction the contact parts.

Bs must be noted that during the opening of the circuit breaker the whip bar 14 is braked at the end of its pivoting path via its end 14a, since this is on a friction surface 20 of the contact part 5 (up to one Stop 20a) rubs along and the friction surface 20 is specially formed so that a strong friction with the end 14 a of the whip rod 14 arises.

Example 2 disconnector in which the disconnection knife is swiveled.

Figure 7 is the side view of such a switch disconnector at Conclude.

Figure 8 is a side view of the circuit breaker of Figure 7 in gesc that state Figure 9 is a side view of the circuit breaker of Figure 7 at Open, Figure 7 shows a circuit breaker with an insulator 25, and the fastening part 26, on which the axis 27, about which the cutting knife 28 pivots, is provided. The free end of the cutting knife 28 has a bolt 29 around which a part the whip bar 3o, the rear end 30a of which is specially shaped, is rolled. The insulator 31 carries the fixed mating contact 32 with which the end of the cutting knife 28 comes into engagement, and on the mating contact 32 is also a rod 33 with a hook 34 attached. There is also a stop 35 on the side of the mating contact 32 attached, the. Whip bar 30 during the movement of the cutting knife 28 presses F3 under the hook 34 in the direction of the arrow.

This movement is indicated in Figure 8 and you can also see that the Whip rod 3o by means of its end 3oa and the stop 35 under the hook 34 of the vertical rod 33 is guided.

When the isolating switch is opened, the cutting knife swivels in the direction of the arrow F4 (Figure 9) and comes out of engagement with the mating contact 32 very quickly, while the whip bar 30 is held under the hook 34 and for a period of time slides under him. When pivoting the cutting knife 28 describes the Whip rod 3o as in the previous example a considerable amount in a very short time Arc in the order of magnitude of 200 °, which also pulls them apart and causing the arc to be extinguished.

Example 3 disconnector, in which the disconnection knife during the closing process a pan and then a. Translational movement.

Figure 10 is a string view of such a circuit breaker at Conclude.

FIG. 11 is a side view of the closed release latch of FIG Figure 10.

FIG. 12 is a side view of the circuit breaker of FIG figure 1o when opening.

In FIG. 10 there are the same elements as in FIGS. 7 and 8 provided with the same symbols. Closing this circuit breaker will initially by pivoting (Figure 1o) and then by moving the cutting knife 28 (Figure 11) causes the end 30a of the whip bar to abut the stop 35, which pushes the whip bar 30 under the hook 34. Opening happens like in the previous examples.

In the case of the disconnectors according to the invention, the arc passes through a long distance in a few hundredths of a second, taking the described path the end of the whip rod follows. This was checked with the help of photographs. The speed of the whip rod end causes it to be pulled apart and Extinguishing of strong high voltage arcs for cos # of 0.1 or 0.9.

The braking of the end of the whiplash can be done equally Damper can be caused by hydraulic or pneumatic friction. Ebçn so can the depressing of the whip bar while closing the circuit breaker be realized by a sliding guide system along the cutting knife, wherein the system can be of manual or hydraulic control.

-. Claims

Claims (7)

P a t e n t a n s p r ü c h e 1. electrical switch-disconnector with a movable cutting knife and a mating contact, characterized in that the cutting knife (4,28) in the area of its free end a whip rod (14, 30) has, which is pivotably mounted on the racing knife (4, 28) and by means of a Spring element is connected to it, and the counter-contact has a hook (13a, 34) has, which engages over the whip bar when the circuit breaker is closed, and that the whip bar (14, 30) under the hook when the disconnector is closed (13a, 34) pressing driver or stop parts are provided. 2. Switch disconnector according to claim 1, characterized in that the whip bar (14, 30) in part helically around one with the Separating knife (4, 28) firmly connected bolts (15, 29) is looped and a das thus formed spring element at the beginning of the opening of the circuit breaker by means of the The free end (14a, 30a) of the whip rod (14, 30) on the cutting blade side is more exciting Stop bolt (16) is provided, which is firmly connected to the cutting knife. 3. Switch disconnector according to claim 1 or 2, characterized in that that the disconnector has a guide part (8) for the cutting knife (4) which one on the whip rod (14) when the circuit breaker closes Under the hook (13a) pressing Am (17) is attached. 4. Switch disconnector according to one of claims 1 or 2, characterized in that that at the mating contact (31) a by means of the closing of the disconnector whip rod end (3Oa) on the cutting knife side, the whip rod (30) under the Hook (34) pressing stop (35) is provided. 5. Switch disconnector according to claim 4, with one for performing the Switching operation pivoted and arranged displaceably in its longitudinal direction Cutting knife, characterized in that the free end (30a) on the cutting knife side the whip bar (30) in the region of the longitudinal movement of the cutting knife (28) the stop (35) comes into engagement. 6. Switch disconnector according to one or more of claims 1 to 5, characterized in that the Treniunesser (4,28) is the rotational movement of the Whip bar (14 3o) has braking friction surface (20) at the end of its path. 7. Switch disconnector according to one or more of claims 1 to i, characterized in that the rotational movement of the whip rod (14, 30) Hydraulic or pneumatic dampers that brake at the end of their path are provided is. L e r s e i t e