JPS595515A - Neutral polarity switching device coupled to phase switch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a device having one end fixed to a first connection terminal and the other end connected to and separated from a second connection terminal by an operating device to connect these connection terminals. with bridging elastically bendable spring-like contacts;
The manual operation knob of the operating device is rotatably supported by the rotation of the bearing pin, which is dangerous! [Prior art and its problems] Generally, the opening and closing of the neutral pole is always manually performed using such a switching device. However, in this case, it must be ensured that the neutral pole switching device is turned on first before the phase gap device, and in the event of disconnection, it must be prevented that the neutral pole is opened before the phase gap device. . It is also desired that the internal structure of the neutral pole switching device be simple and consist of a small number of parts.

Furthermore, it is known to mechanically couple the operating knob of the neutral pole switching device and the operating knob of the phase opening device so that the neutral pole is always opened and closed without any load (Swiss Patent No. 4
No. 08175). Furthermore, it is known to construct a neutral switching device in such a way that both connecting terminals can be bridged by a spring-like contact.

In this case, one end of the spring-like contactor is fixed to the first connection terminal, and the other end is pressed against the second connection terminal by the helical spring when no operating force is applied. Opening of this neutral pole switching device is effected by a contact arm that applies a force to a spring-like contact, which force deflects the spring-like contact. When this force is no longer applied to the spring-like contact, the spring-like contact of the neutral pole switching device returns to its original state and closes the circuit, supported by the helical spring.

[Purpose of the invention]

The purpose of this invention is to improve a neutral pole switching device by allowing the neutral pole switching device to close the contact without a helical spring, which tends to fail when the neutral pole switching device is equipped with a spring-like contact and an operating device. shall be.

[Key points of the invention]

The purpose of this is to use the type of neutral switchgear described above, in which the spring-like contact is separated from the second connection terminal when no external force is applied, and one end of the spring-like contact is separated from the second connection terminal. It is connected to the operating device by an arcuate link that is engaged approximately in the center and whose other end is connected to the bearing body, and when the joint portion of the arcuate link and the bearing body forms a toggle lever in the closed state, the bearing pin This is achieved by being located above the

The arcuate link achieves a good force transmission between the operating knob and the spring-like contact, so that the spring-like contact can be pressed against the connection terminal against its spring force. The toggle lever acts as a restraint and can be opened with sufficient force by the spring contact. Since no auxiliary spring is required, there is no need to offset the spring force, and the neutral switch therefore operates with a small force.

[Embodiments of the invention]

The spring-like contact is configured to be elastic so that its return force is greater than the frictional force of the operating device in the open state.

When the toggle lever is released, the spring-like contact automatically and quickly separates from the connecting terminal due to its spring force without being subjected to any external force.

The fixed end of the spring contact is welded to the first connecting terminal in a known manner. The free end of the spring-like contact can be lined with contact material, which effectively prevents welding with the connecting terminal.

The operating device of the neutral pole opening/closing device mainly consists of a disc having a handle provided in the radial direction as a manual operating knob. This disk is supported at its center by a bearing pin and rotates by an angle formed between the two end positions, and the movement of the handle is correspondingly limited by the geometry of the case of the neutral switchgear. . This makes it possible to connect the spring-like contact in the form of a toggle lever with an arcuate link of the operating device.

In order to simplify the construction, it is preferable to form the arcuate link into a U-shape. The legs are respectively engaged in holes in the disc of the operating device and in the central ears of the spring-like contact. The hole in the disc should be constructed so that it lies vertically above the axis of rotation of the operating device when the handle is in the closed end position. This provides a simple construction of the toggle lever.

What is the mechanical connection between the neutral pole switching device and the phase opening/closing device?

This can be obtained by configuring the manual operation knob of the neutral pole switching device to cover the manual operation knob of the phase opening device in a roof-like manner and protrude from it in the cut-off state. When this protrusion extends very close to the case of the neutral pole switching device, it is ensured that the manual operating knob of the neutral pole switching device is always closed before the manual operating knob of the phase gap device. .

Apart from the roof-like projection of the manual control knob and its special mode of operation, such a connection is known for mechanically connected circuit breakers and earth-fault circuit breakers (German Patent Office Announcement no. No. 1280382).

The manual operation knob of the neutral pole switching device and the manual operation knob of the phase opening/closing device are firmly connected. In this case, the closing angle of the manual operation knob of the neutral pole switching device should be selected to be smaller than the closing angle of the manual operation knob of the phase opening device. This ensures that the neutral switch is always turned on before the phase gap switch.

A further construction for the connection of the respective operating devices of the neutral pole switching device and the phase opening/closing device is activated by a push button.

In this structure, a pin is provided which is coupled to the phase spacing device and engages in an elongated hole formed over a certain angle in the bearing body of the neutral pole switching device. The push button allows for manual shutoff of both the neutral pole switching device and the phase opening device more quickly than using manual operating knobs.

[Embodiments of the invention]

Next, the present invention will be explained in detail with reference to drawings showing two embodiments of the neutral pole switching device based on the present invention.

In FIG. 1 showing Embodiment 1, the neutral pole switching device consists of a case 1, two connecting terminals 2 and 3, and a spring-like contact 4 capable of bridging these connecting terminals. The spring contact 4 is welded to the connection terminal 2. The free end of the spring contact 4 is lined with contact material. When no external force is applied, the spring-like contactor 4 is separated from the connection terminal 3. It is supported so that it can rotate by a certain angle that corresponds to the operation picture. The arcuate link 8 extends from the hole 9 in the bearing body 6 to the central ear 0 of the spring contact 4. When the spring-like contactor 4 contacts the connecting terminal 3, the hole 9 of the bearing body 6 is located above the bearing pin 7. The arcuate link 8 and the bearing body 6 then form a toggle lever, which securely restrains the spring contact 4 on the connecting terminal 3.

FIG. 2 is a partial view of the case 11 of the phase opening device with the manual operation knob 12 in the cutoff position. The manual operating knob 5 of the neutral pole switching device is formed to cover the manual operating knob 12 of the phase opening device in a roof-like manner and protrude from it. The protrusion 13 extends across the side of the case 11. The manual actuation knob 5 of the neutral switch is therefore always engaged before the manual actuation knob 12 of the phase gap device, as required for safety reasons.

FIG. 3 is a plan view of the arcuate link 8 of the neutral pole switching device shown in FIG. In its upper part, the arcuate link has a lateral curvature 14 for bypassing the bearing pin 7.

FIG. 4 is a side view of the arcuate link 8 shown in FIG. 3. U
The leg 15 of the arcuate link 8 bent in the shape of a
The connecting point 9 engages, for example, in a hole in the bearing body 6 shown in FIG. The leg 16 is supported on the central ear 10 of the spring contact 4.

In Example 2 of the neutral pole switching device shown in FIG.

This device is connected via a pin 17 to a phase separation device. This pin 17 engages with an elongated hole 18 formed over an angle in a bearing body 19 of the neutral pole switching device. A coupling protrusion 20 is formed on the bearing body 19, and a push button 21 can be pressed onto this protrusion. The other structures are the same as in the first embodiment.

When the phase is interrupted, the pin 17 moves along the elongated hole 18. However, if you manually open the neutral pole switching device,
The bearing body 19 drives the pin 17 and the phase opening device is also cut off. A push button 21 is provided for opening the neutral pole and the mating contacts connected thereto, which push button is arranged above a coupling projection 20 formed on the bearing body 19. When the push button 21 is operated, the toggle lever consisting of the arcuate link 8 and the bearing body 19 is released, so that the spring contactor 4 is released and the neutral electrode opening/closing device is opened. When the phase opening device is manually turned on, the pin 17 is driven. At that time, if the neutral pole switching device has been opened in advance, the elongated hole 1
8 drives the bearing body 19, which rotates to restrain the toggle lever and close the spring contact 4.

〔Effect of the invention〕

A neutral pole is provided with a spring-like contact bridging both connection terminals, and a manual operation device for opening and closing it is formed on a cylindrical bearing body that can rotate around a bearing pin. In the switchgear of the present invention, the spring-like contact is separated from one connection terminal when no external force is applied, and one end is engaged with approximately the center of the spring-like contact and the other end is connected to the bearing body. It is connected to the operating device by an arcuate link connected to the holder, and the connection point to the bearing body forms a toggle lever in the closed state and is located above the bearing pin, thereby forming a spring-like contactor. A helical spring for closing the pole is no longer required, which simplifies the structure and increases reliability.Also, since no auxiliary spring is required, there is no need to offset the spring force, and therefore the neutral pole can be opened and closed. The device works with a small force and has the effect that the spring contactor is restrained by one toggle lever after closing.

[Brief explanation of drawings]

Figure 1 shows Example 1 of a neutral pole switching device based on this invention.
2 is a partial view of the operating device of the phase gap device mechanically connected to the operating device of the neutral pole switching device shown in FIG. 1, and FIG. 3 is a front view of the arcuate link. , FIG. 4 is a side view of the bow-shaped link, and FIG. 5 is a sectional view of the second embodiment of the neutral pole switching device in the closed state. In the drawing, 1 is the case of the neutral pole switching device, 2 is the first
3 is a second connection terminal, 4 is a spring-like contact,
5 is the manual operation knob, 6 is the bearing body, 7 is the bearing pin% 8
9 is a bow-shaped link, 9 is a connecting portion, 10 is an ear portion, 11 is a case of a phase opening device, 12 is a manual operation knob, 13 is a protruding portion, and 14 is a curved portion. 15 and 16 are legs, 17 is a pin, 1B is an elongated hole, 19 is a bearing body, 20 is a coupling projection, and 21 is a push button. FIG4 FIG5

Claims (1)

[Claims] 1) An elastically bendable spring whose one end is fixed to the first connecting terminal and whose other end is brought into contact with and separated from the second connecting terminal by an operating device to bridge these connecting terminals. The manual operating knob of the operating device is mechanically coupled to a phase gap device formed on a substantially cylindrical bearing body rotatably supported around a bearing pin, and In polar switching devices,
The spring-like contact is separated from the second connection terminal when no external force is applied thereto, and has one end engaged with approximately the center of the spring-like contact and the other end connected to the bearing body. The link is connected to a shaft operating device, and the connection point between the arcuate link and the bearing body forms a toggle lever and is located above the bearing pin in a closed state. neutral pole switching device. 2. The device according to claim 1, characterized in that the spring-like contact is configured elastically so that its return force is greater than the frictional force of the operating device in the open state. Neutral switching device combined with phase opening device. 3) In the device according to claim 1, the operating device comprises a disk as a bearing body having a handle provided in the radial direction as a manual operation knob, and this disk has its center in the bearing bin. Neutral pole opening/closing combined with a phase opening device, characterized in that it is supported and pivots through an angle consisting of two end positions, and that the movement of the handle is correspondingly limited by the geometry of the case. Device. 4) In the device according to any one of claims 1 to 3, the arcuate link is formed in a U-shape, and its legs are located in the hole of the bearing body of the operating device and in the center of the spring-like contact, respectively. The neutral pole opening/closing device is coupled with a phase opening device characterized in that the arcuate link has a transverse curved portion at its upper portion for circumventing the bearing pin of the operating device. . 5) In the device according to claim 1, the manual operation knob of the phase gap device contacts the manual operation knob of the neutral pole switching device in the closed state, and the manual operation knob of the neutral pole switching device is disconnected. In this state, the manual operation knob of the phase opening device is covered like a roof and protrudes from it,
A neutral pole switching device combined with a phase spacing device, characterized in that this protrusion extends close to a case of the phase spacing device. 6) In the device according to claim 1, the manual operation knob of the neutral pole switching device and the manual operation knob of the phase opening device are firmly connected, and the manual operation knob of the neutral pole switching device is firmly connected. A neutral pole switching device combined with a phase gap device, characterized in that the closing angle of the knob is smaller than the closing angle of a manually operated knob of the phase gap device. 7) In the device according to claim 1, the pin connected to the phase opening device engages with a long piece formed at an angle that becomes a bearing body of the neutral pole switching device, and the push button What is claimed is: 1. A neutral pole switching device combined with a phase spacing device, characterized in that the is disposed above a connecting protrusion formed on a bearing body. 8) The device according to any one of claims 1 to 4, which is combined with a phase gap device characterized in that one end of the spring-like contact is welded to the first connection terminal. Neutral pole switching device 09) The device according to any one of claims 1 to 4, characterized in that the free end of the spring-like contact is covered with a contact material. Neutral switching device combined with the device.