JPS61199406A - Spring release device for drawer type circuit breaker - 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 spring release device for an electric spring closing type drawer type circuit breaker, mainly a high-speed repeater type [Prior art and its problems] ] Conventionally, none of the drawer-type circuit breakers made by Yuzu have been equipped with a spring release device when the circuit breaker is pulled out. If the circuit breaker is in the stored state, the circuit breaker is first turned on by operating the closing lever, and then the cut-off lever is operated to turn the circuit breaker into the shut-off state, a so-called release operation. As a matter of course, it is natural that the user forgets to release the power and pulls out the power while it is in the stored state, which has the disadvantage that there is a potential danger from the tentacles of the mechanism.

[Purpose of the invention]

In view of the above, the object of the present invention is to automatically release the spring force when the closing spring is in the stored state when the closing spring is pulled out from the test position of the housing switchboard to the outside of the panel, thereby ensuring safety. An object of the present invention is to provide a spring release device for a circuit breaker.

[Key points of the invention]

The main point of this invention is that, in order to achieve the above-mentioned purpose, when the closing spring of a spring-loading type circuit breaker placed on a trolley that can be pulled out along the base is in the stored state, the pulling-out operation from the test position is performed. A device for releasing the closing spring, the device comprising: an operation rod which is disposed so as to be able to engage simultaneously with a closing lever and a cutoff lever provided in the circuit breaker and is freely supported in the axial direction; An engaging rod that is supported vertically freely on a trolley and is biased downward by its own weight or a spring, and an engaging rod that is attached to the base that is on the front side of the engaging rod and that engages when pulled out. It consists of an engagement piece with a slope before and after pushing up the circuit breaker, and is released by simultaneous operation of both the closing and closing levers by moving the operating rod backwards when the circuit breaker is pulled out.

[Embodiments of the invention]

1 and 2 are diagrams showing an embodiment of a spring release device for a reference type circuit breaker according to the present invention. The discharge state associated with the withdrawal operation is shown in each case, and the circuit breaker is a re-closing type vacuum circuit breaker. Drawout type circuit breaker 2 in the test position of switchboard 1 in Fig. 1
The operating shaft 3 is biased in the counterclockwise direction by a charging spring (not shown) in a state of storing energy, and due to engagement between the roller 4a of the lever 4 integrated with the operating shaft 3 and the charging lever 5. Rotation is restricted. On the other hand, the shutoff pole column (7) (not shown) connected to the opening/closing shaft 6 located above the operating shaft 3 (all valves) is in the shutoff state, and therefore the opening/closing shaft 6
The roller 7a and the cutoff lever 8 provided in the 1/bar 7 integrated with the 1/bar 7 are in a tripped state. The closing lever 5 and the shutting lever 8 are both pivoted at the medium heat section and formed in a double-sided shape, and one end of each is operated by the above-mentioned j-.
3 and the roller 7a of opening/closing@116. Both closing and closing levers 5,
8 are pivotally supported with their other ends facing each other, and a lockable closing coil 9 and a tripping coil 10 are provided in each of the lever portions on the other end side. A closing spring releasing device 20 is provided on the opposite end of both the closing and closing levers 5 and 80, and the distal end of the closing spring is engaged with both the legs at the same time. Reno for direction change (= 12, consisting of an engaging rod 13, a compression spring 14, and an engaging piece 15. The operating rod 11 is operated by pushing from the front side (right side in the figure) of the circuit breaker 2. A reno (-12 is an operating rod) for changing the zero direction, which is disposed so that its tips are engaged with both of the aforementioned leg pieces at the same time, and is supported freely in the axial direction on the frame 2a of the circuit breaker 2. The O-engaging rod 13, which is provided at the connection point of the engaging rod 13 and whose intermediate portion is pivotally supported by the frame 2a, is connected to a metal fitting 16 attached to the frame 2a.
It is freely supported in the vertical direction via the metal fittings 16.
The compression spring 14 wound around itself in between is biased downwardly by υ. The engagement piece 15 is installed on the switchboard 10 base la on the front side of the engagement rod 13, and is used to engage the engagement rod 13 and push it up when the circuit breaker 2 is pulled out from the test position. It has a sloped shape from front to back. Note that when the engaging rod 13 lowers due to its own weight, the operating rod 1
If it is possible to pull 1 toward the front, the compression spring 14 may be omitted.

In the above configuration, the release device 20 is operated simply by pulling the circuit breaker 2 out of the panel from the test position, regardless of whether or not the closing spring has stored energy, and is also operated by pushing the operating rod 11. It has become.

For clarity, when the closing spring is in the energized state, when the circuit breaker 2 is pulled out, the engagement rod 13 engages with the engagement piece 15 and is pushed up. The operating rod 11 moves rearward and engages the opposing legs of the closing lever 5 and the blocking lever 8 at the same time. Due to this engagement, the υ closing lever 5 and the cutoff lever 8 operate simultaneously as shown in FIG. Out of alignment,
The operating shaft 3 rotates counterclockwise to release the closing spring, and at the same time, the opening/closing shaft 6 is rotated counterclockwise via a connecting rod (not shown) to instantaneously close the blocking pole. However, at this time, since the cutoff lever 8 is also operating at the same time, the roller 7a of the opening/closing shaft 6 and the cutoff lever 8 are not engaged with each other, and therefore the cutoff pole column returns to the cutoff state. At this time, although not shown, the control circuit of the electric actuator for closing spring energy storage is in an open state, so the closing spring is not stored, and therefore both the closing spring and the cutoff spring are in a released state. This will ensure safety when withdrawing.

Although the embodiments described above are applied to vacuum circuit breakers, it goes without saying that the present invention is not limited to this as long as the circuit breaker is of a spring closing type equipped with an energy storage device.

〔Effect of the invention〕

According to this invention, an engaging rod is provided on the circuit breaker side that is coupled to an operating rod that can be engaged with the closing lever and the shutoff lever simultaneously and is movable in the vertical direction, and is located on the ^1'' surface side of the engaging rod. By having an engaging piece that engages when the storage switchboard is pulled out from the test position, a spring release device for a drawer-type circuit breaker with a simple structure and high reliability can be obtained.

[Brief explanation of drawings]

1 and 2 are diagrams showing an embodiment of a spring release device for a draw-out type circuit breaker according to the present invention. FIG. 2 is a side view of the main part showing the operating state of the release device when it is pulled out from the test position. 2... Breaker, 5... Closing lever, 8
・・・・・・Shutoff lever, 11 ・・・・Operation rod, 1
3...Engagement rod, 14...Compression spring, 1
5... Engagement piece, 20... Release device. Figure 1 Figure 2

Claims (1)

[Claims] 1) A device for releasing the closing spring of a spring-loading type circuit breaker placed on a trolley that can be pulled out along the base when the closing spring is in a stored state by pulling out the circuit breaker from the test position, an operating rod that is disposed so as to be able to engage simultaneously with a closing lever and a cut-off lever of the circuit breaker and is freely supported in the axial direction; and an operating rod that is coupled to the operating rod and is supported vertically freely on the trolley and that extends downwardly. an engaging rod that is biased by its own weight or a spring; and an engaging piece that is attached to the base on the front side of the engaging rod and has a front and back slope that engages when pulled out and pushes up the engaging rod. A spring release device for a drawer-type circuit breaker, characterized by comprising: