DE1020079B - High-voltage switch-disconnector with main and auxiliary switching contacts - Google Patents

Description

The invention relates to a high-voltage switch-disconnector, which is characterized by a particular simplicity of its execution and a particular operational reliability. Such Switch disconnectors generally consist of the components, the disconnector - switch blade, Contacts, supports, frames and actuation mechanisms and mechanisms - and also have auxiliary contacts and extinguishing devices to switch off a limited Operating current.

An arc extinguishing device is already known for disconnectors with knife-like contacts to be provided in which the arc is "clamped off" in that two are pressed against each other by spring pressure Insulating pieces that surround the contact spring sets fastened in the base, after they have been pulled out of the moving main contact piece firmly compressed will. Other known interrupting devices for the arc are that an insulating bar is provided, which opens the passage opening provided for the movable contact part locks during the switch-off process and cuts off the arc. These are around arcing chambers of circuit breakers that have a pin-shaped moving main contact, wherein the insulating bar is under the action of a spring force. This can turn out to be Insulating material arranged and rotatably existing closure piece. with the moving main contact piece be coupled.

The last mentioned, their principle according to known arc extinguishing devices, in which the Cut-off arcs cut off by the movement of a bolt are for knife-like Main contacts in disconnectors cannot be used because they have neither an insulating housing nor a There is a passage opening for the main contact. The mere "pinching off" of the mentioned at the beginning Arc requires disproportionately large pieces of insulation, which are in the lower part of the disconnector contact spring sets located on all sides. Surrounded by a switching chamber.

To remedy these disadvantages, it is proposed according to the invention in a high-voltage switch-disconnector with a main switching contact, preferably designed as a pivoting switch blade, and an auxiliary switching contact connected to it, in which the arc that occurs when the auxiliary switching contact is opened is interrupted by a spring-loaded bolt made of insulating material, that the insulating material bolt, which is provided with a contact piece which is in conductive connection with the fixed mating contact of the movable main switch, during the switch-on process Hodi voltage switch-disconnector
with main and auxiliary switching contact

Applicant:
Feiten & Guilleaume Carlswerk

Corporation,
Cologne-Mülheim, Schanzenstr. 24

Dipl.-Ing. Franz-Karl Grossmann,

Duisburg-Wanheimerort,
has been named as the inventor

Via a coupling element through the main contact from its rest position blocking the path of the auxiliary contact is moved out and when switching off with the contact piece attached to it Utilization of the spring force stored during the switch-on process, jamming for so long on the Auxiliary contact piece acts until the opening of the same inevitably through the movable main contact piece he follows. The advantage of this arrangement is that the movable insulating bar is dependent on the moving main contact during the switch-on process and during the switch-off process the weaker auxiliary contact only serves as a shut-off device. The cocking of the latch onerous spring is carried out by the powerfully executed Main switching contact without any special drive parts for tensioning this Spring must be provided.

Another advantage is that the new switch also has the auxiliary contact when it is switched on later than the main contact switches, as the activation of the switch-on path for the auxiliary contact is enabled only takes place when the main switching contact is closed.

This staggered switching on can be of particular importance when the high-voltage switch-disconnector is switched on to an existing short circuit. The strong main switch contact is designed to withstand the stresses that occur easily grown, while the much weaker, z. B. only for the normal The auxiliary contact designed for the operating current could be damaged very easily if you turn it on first turn on. In the proposed way, a switch with an arc extinguishing device can also be used

709 807/192

Claims (4)

pressed. The tip of the auxiliary contact piece engages through an opening 12 made radially in the contact screen 13th The operation of the high-voltage switch disconnector 5 according to the invention should be based on the Figs. 4 to 8 will be explained. The auxiliary contact piece 13 is shown as the end piece of the contact clip 14. This bracket is firmly connected to the switch blade 3 by means of the clamp 15 and is in a further only snaps into the opening 12 at the moment it is released (see FIG. 6). Now is the state reached, as shown in Fig. 1 in section very simple, means can be made without one Significant enlargement of the switch dimensions or fundamental changes in the design of the switch to have to make. To further simplify the switch, the invention proposes the insulating bar to be provided with a cone-like approach, which is in the pivoting range of the movable main switch contact (Switch knife) protrudes. In contrast to the previously known io clamp 16 out. The insulating material bar itself should be used when the the mating contact piece of the auxiliary switching contact erase head in the one shown in FIG. 3. Position, wear. According to the further invention, the lever 9 is struck by the springs 10 on the top, that the insulating bar brought on a conductive blow. The opening 12 is through the with the fixed mating contact of the main switch 15 bolt 6 insulated closed. contact connected metallic axis rotatable When switching on (see Fig. 4) the switch is mounted and that the knife attached to the bolt 3 moves in the direction of the arrow, then the contact piece in constant contact with the axis, contact bracket 14 follows this movement until the tip 13 z. B. via a spring. in the opening 12 on the. through the insulating material to achieve with certainty that the arc 20 bar 6 encounters generated resistance. The latch 6 when the switch on the auxiliary switching contact is opened is rotated by the switching knife 3, which is pulled onto the lever 9, there is a further formation of the pushes (see FIG. 5). As long as the opening 12 is the subject of the invention in that the auxiliary switch is closed, the tip 13 of the movement can contact via an elastic connecting member, for. B. the switch blade 3 do not obey. The contact is a resilient bracket, with the bracket 14 acting as a switching knife 25, flexes elastically, being held by the main switching contact formed, preferably in the guide clip 16. The tip 13 near the pivot point of the main switching contact, mechanically firmly connected, is and through
a stop on the main switch contact, possibly through the upper edge of the switch blade, is below 30. A contact or a contact pressure utilizing the inherent elasticity of the bracket with time between the tip 13 and the contact piece 7 is inevitably delayed from the switch-on initially not necessary. It is even useful to move the position out. by deliberately overturning the insulating bar 6 In the drawing, in FIGS. 1 to 8, the load-an electrically conductive connection in the erase head to the isolating switch in an exemplary embodiment is avoided in order to avoid this relatively weak contact. 1 shows the erase head in a longitudinal section. The main contact piece 2 does not become damaged in the switched-on state. The erase head is in danger on the contact block 1, which is isolated on the When switching off the switch blade 3 Not shown frame is attached, the (see Fig. 7) moves in the direction of the arrow, the Kontaktboek 1 also carries the main contact 2, in 40 auxiliary contact closes under the tension of the springs 10, which the switch blade 3 engages. As a carrier of because the lever 9 is released from the switch blade 3. The erasing head has two bars 4 on the contact pad attached, the bearing for the threaded bolt 5 can not be done initially; he's through the top wear, so that this is blocked with current-carrying contact 13. On the other hand, the tip 13 is from Bock is connected. On the threaded bolt 5 a pressure of the bolt 6 is clamped in the opening 12, Insulating bar 6 rotatably mounted. In the isolating so that when the switch blade moves the contact sto'ffriegel a recess is provided which the timing bracket 14 resiliently biases. Pulling out the Contact piece 7 receives. A tension spring 8 is finally moved out of the opening 12 by means of a tip 13. a dowel pin fastened in the insulating material bar and forcefully when the upper edge of the switch blade On the one hand, the contact piece 7 pulls against, and the sole 50 presses against the bracket 14. the recess and on the other hand against the current. Now the actual arc extinguishing demonstration takes place Threaded bolt 5. If the bearing bore is gang. The moment the contact tip the insulating bar made sufficiently large, then 13 leaves the opening 12, it snaps through the the same about the. The amount of bearing play increased the spring force of the contact bracket 14 upwards pulled upwards elastically by the spring force, An 55 (see Fig. 8). At the same time in the erase head the the outer jacket of the insulating bar is blocking of the insulating bar 6 lifted! so that the lever 9_, to which the switch blade 3 gives way to the pull of the springs 10 and is in switched state and thus the spring force rotates the stop position (see Fig. 3). It will two further tension springs 10, on the one hand on the one from the contact piece 7 to the contact tip 13 Insulating bars are attached, overcomes. The 60 burning arcs inevitably cut off. Springs 10 tend to remove the insulating material. The separation of the arc takes place in the vicinity bolt 6 with counterclockwise rotation (see Fig. 3) to the stop of a current zero passage, since the mechanical bring to. On the other hand, the springs 10 are at the pressing action of the arc at the time of a current steady Contact screen 11 attached; this is still sufficient to exceed the spring balancer the insulating material latch on four sides and is to wind 65, and to delay the shutdown process., formed inside so that it is in its upper Part of the jacket of the insulating bar adapts. Since patent claims: the bolt 6 by the amount of the bearing play 1. High-voltage switch-disconnector with a upwards, it is under the pull of the spring, preferably as a swiveling switch blade 8 main switching contact formed in the inner rounding of the contact screen 70 and thus tied auxiliary switching contact, the resulting when the auxiliary switching contact is opened Arc through a spring force. Bar made of insulating material is interrupted, thereby characterized in that the insulating bar (6), deir with one with the fixed mating contact (2) of the moving main switching contact in conductive connection contact piece (7) is provided, during the switch-on process via a coupling element (9) through the main contact (3) its rest position blocking the path of the auxiliary contact (13) is moved out and during the switch-off process with the contact piece (7) attached to it, making use of the spring force stored during the switching process acts long clamping on the auxiliary contact piece (13) until the opening of the same inevitably takes place by the movable main contact piece. 2. High-voltage switch disconnector according to claim 1, characterized in that the insulating fabric bolt (6) has a lever-like extension (9) which is in the pivoting range of the movable Main switch contact (switch blade) protrudes. 3. High-voltage switch disconnector according to claim 1, characterized in that the insulating bar (6) on one that is conductively connected to the fixed mating contact of the main switching contact metallic axis (5) is rotatably mounted and the contact piece attached to the bolt (7) in constant contact with the axle, e.g. B. via a spring. 4. High-voltage switch disconnector according to claim 1, characterized in that the movable Auxiliary switching contact (13) via an elastic connecting member (14), in particular a resilient bracket with the movable main switch contact (3) designed as a switch blade preferably mechanically firmly connected in the vicinity of the pivot point of the main switching contact and by a stop on the main switching contact, possibly the upper edge of the Switch blade, taking advantage of the inherent elasticity of the bracket with a time delay is inevitably moved out of the switch-on position. Considered publications:
German Patent Nos. 369 781, 472 305, 095, 652 800; Austrian Patent No. 99 873;
British Patent No. 409,944. 1 sheet of drawings © 709 807/192 11:57