JPS61140016A - Switchgear - 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 The present invention relates to a retractable switchgear, in particular a switchgear having a telescoping track which can be retracted with the device to a cell of the device.

Circuit breakers stacked within a metal enclosure or envelope structure are often pullable. An example of a pull-out configuration is where the circuit breaker is housed in a compartment with a front door that must be opened to access a telescoping track located within the compartment. Variations on this configuration include having a portion of the circuit breaker protrude through a hole formed in the front door, or incorporating a panel into the front door that can be moved to allow access to the front controls of the circuit breaker. There is a structure.

Both configurations are the same in that the door must be opened in order to pull out the circuit breaker. A simplified arrangement of the track in which no load is applied to the track until the circuit breaker is pulled out beyond the fully disconnected position is known, for example, from US Pat. No. 3,483,338.

If the compartment is not provided with a front door, personnel protection is provided by providing the circuit breaker with a front panel that completely closes the compartment opening when the circuit breaker is in the connected condition. In such an arrangement, the telescoping track is located behind the panel and it is neither possible to approach the telescoping track nor for it to protrude beyond the front panel. Furthermore, if there is no track to support the circuit breaker, the circuit breaker cannot be pulled out due to the shifting of the rollers.

One possible solution to this problem is to support the circuit breaker with a telescopic track at all times. However, in this case, the track must be strong enough to withstand the force associated with the short circuit, which requires considerable cost.

The present invention provides a pull-out switchgear for distributing power from a power source to devices that consume power, including a cell having a front opening, a cutoff unit that can freely enter and exit the cell, and a fixed terminal means supported within the cell. a movable terminal means attached to said unit and movable with the cell between connection and disconnection positions of the fixed terminal means; and guide means comprising tracks spaced apart from each other within the cell and supporting said unit during its movement; an extension of each track movably mounted in the vicinity of each track, moving into and out of the cell with said unit and supporting said unit as it passes through the front opening; We propose a type switchgear.

Preferably, the opening/closing unit is removably arranged within the cell and comprises rollers, and the fixed track is provided within the cell;
a support surface that engages with the rollers to support the unit when the unit is inside the cell, and a support surface that allows the telescoping track to be slidably supported on the fixed track in a retracted position into the cell; and a protruding position in which the support surface of the telescoping track projects outside the cell, the opening/closing unit comprising a front panel for closing the front opening when the unit is in the cell, the telescoping track comprising: A toothed structure that engages the roller to extend and support the unit with the unit as it passes through the front opening, and a telescoping track engages the roller to pull the telescoping track with the unit out of the cell. including the front panel,
the stationary and telescoping tracks each have first and second support surfaces that engage the rollers as the unit moves into the cell; Unit support is the first priority as
and the second support surface in eight rows between the first support surface and the second support surface.
Set it slightly higher than the support surface.

The advantage of the device of the invention is that although access to the telescopic truck is not possible in compartments without front doors, this problem is solved by automatically evacuation of the truck 1 rack with the circuit breaker. be.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown, the pull-out switch 5 comprises a circuit breaker 7 and a cell or housing 9, which circuit breaker 9 is similar in construction and operation to that disclosed in U.S. Pat. No. 3,483,338. Almost the same. The circuit breaker 7 is housed in a molded housing made of high-strength phenolic resin, such as reinforced glass fiber. A movable terminal means or terminal 11.13 (FIG. 1) projects from the rear wall of the circuit breaker and a fixed terminal means or stub 15.1 passes through the rear wall 19 of the cell 9.
7 is placed on the right side of the wall as seen in Figure 1 (not shown)
Connected to the busbar. The circuit passing through the switch 5 starts from the stub 15, passes through the terminal work 1, the circuit breaker 7, and connects to the terminal 1.
3, it roughly reaches the stub 17.

The cell 9 has side walls 21, 23, a rear wall 19 and a front opening 2.
Consists of 5.

Circuit breaker 7 includes a front panel 27 which closes front opening 25 when in the active or connected position (FIG. 1). Frame members 29, 31 (FIG. 8) are attached to both sides of the cell 9 to support the circuit breaker 7. To this end, each frame member has a mandrel or pin 3 projecting from both sides of the circuit breaker.
9 includes a slot 33 for a support wheel or roller 35, 37 attached to it. Each frame member 29.31
includes bras 41 spaced apart and attached to the frame members by spacer bolts 43.

A telescoping track 45 is attached to each frame member 29.31 and held by a corresponding bracket 4.1. Each bracket 41 includes a longitudinal slot 47 into which a retaining pin 49 provided on the track is inserted. Also attached to the frame member are support bearings 51 which support the telescoping track in its fully extended position (FIG. 3). When the circuit breaker 7 is in the fully activated or connected state (Fig. 1),
The telescoping truck 45 is retracted to the retracted position.

In the process of withdrawing the circuit breaker 7 from the cell 9 from the position of FIG. 1 to the position of FIG.
to the left in the slot 33 along the support surface 53 until it engages with the support surface 53 . When the unit or the circuit breaker 7 is further pulled out, the force of the roller 35 applied to the projection 55 causes the telescopic track supported by the support bearing 51 provided on the frame member 31 to move together with the circuit breaker. If you continue to pull out the circuit breaker or unit 7 from the position shown in Figure 2 to the position shown in Figure 3,
The rollers 35, 37 leave the support surface 53 and move onto the track 45.
The circuit breaker is supported only by this surface 57. As can be seen in FIG. 3, the track 45 is held by roller bearings 51 and retaining pins 49 inserted through slots 47 in the bracket 41.

From the fully extended position (Figure 3) to the connected or activated position (
1) until the panel surface 59 abuts the outside of the track 45 @ 61 and retracts the track to the position between the frame member 31 and the bracket 41 (FIGS. 4-7). The rollers 35,37 are retracted along the plane 57 of the track 45. When the roller 37 is further retracted from the withdrawn position (FIG. 3), the roller 37 engages the support surface 53 in the slot 33.
Move to.

As the support surface 53 is slightly higher (approximately 0.031 inch) than the height of the track surface 57, as shown by arrow 63 in FIG. 59 ascends the ramp 65 and transfers the load of the circuit breaker from the telescoping track 45 to the frame member 31. The roller then closes the circuit breaker "'tiM(ffffi!E ("m"401""
"°j continue to move within the slot until they respectively engage the stubs 15.17.

A lever mechanism 67 is provided to ensure that the circuit breaker 7 is moved to the position where the terminal 11.13 connects with the stub 15.17. The lever mechanism 67 includes an operating shaft 69, a cam lever 71 provided on the shaft, and a cam bin 73. As the circuit breaker 7 is moved back into the cell, the cam bin 73 advances into the slot 33 until it reaches the right end of the slot where an upwardly curved slot cam portion 75 is provided. Next, when the operating shaft 69 is manually rotated, for example, via a lever (not shown), the cam lever 71 rotates in the counterclockwise direction, causing the bottle 73 to enter the slot cam portion 75, where the bottle 7
3 engages slotted surface 75a (FIG. 1) of cam portion 75 to drive terminal 11.13 and stub 15.17 and lock them into secure electrical contact.

In addition to the terminals 11.13 and terminal stubs 15.17, second connectors or contacts 77 are retractably mounted on the side walls 21.23 of the cell, while on the outside of the circuit breaker 7 there are two
A secondary or contact terminal 79 is attached for retractable engagement with the secondary connector 77. For this reason,
The second connector 77 is attached to a retractable means consisting of a bracket 81, a guide pin 83 attached to the bracket, and a coil spring 85. Second terminal 7
9 consists of a plurality of terminals 87 which enter into corresponding sockets provided in the second connector 77 in the intermediate or test position. From each of the second connector 77 and the second terminal (
(not shown) extend in a conventional manner.

When moving the circuit breaker 7 into the cell 9, the circuit breaker passes through the disconnect, intermediate or test position and reaches the connected position. In the disconnected position (Fig. 3), the terminal 11.13 connects to the stub 15.1.
7, and the second connector 77 and the second connector 79 are disengaged from each other. Intermediate or test position (second
In Figure), the second connector 77 and the second terminal are connected to each other, but the terminal 11.13 and the stub 15.17 are disengaged. Finally, when the circuit breaker reaches the connected position (FIG. 1), the terminals and stubs 11-17 connect to each other, and the second connector 77 and terminals 79 also connect to each other.

As is clear from the above description, the opening/closing device of the present invention is supported by a fixed track within the cell, and the telescopic track can automatically protrude from the cell without separately operating the track unlike known structures. Provides a circuit breaker that can be retracted inwards.

[Brief explanation of the drawing]

FIG. 1 is a side view of the switchgear of the invention with the removable unit fully seated within the associated cubicle or cell; FIG. FIG. 2 is a side view similar to FIG. 1, showing the removable unit partially pulled out of the cubicle or cell; FIG. 3 is a side view similar to FIG. 2, showing the retractable unit fully extended from the working position of FIG. 1 and supported by a telescoping track; FIG. 4 is a plan view taken along line rV-IV in FIG. 1. FIG. 5 is an elevational view of the frame telescopic track. FIG. 6 is a plan view taken along the line Vl--Vl in FIG. 5. FIG. 7 is an end view taken along the line ■--■ in FIG. 5. 5... Switchgear 7... Breaker 9... Cell 13... Movable terminal 15... Fixed terminal 27... Front panel 31... Frame member 45. ...Telescopic track

Claims (1)

[Claims] 1. In a pull-out switchgear for distributing power from a power source to a device consuming power, a cell having a front opening;
a blocking unit movable into and out of the cell; fixed terminal means supported within the cell; attached to the unit;
movable terminal means movable with the cell between connection and disconnection positions of the fixed terminal means; guide means for supporting said unit during its movement, including tracks spaced apart from each other within the cell; and movable terminal means movable in the vicinity of each track. A pull-out opening/closing device, characterized in that it comprises an extension of each track which is attached to the unit and moves into and out of the cell with the unit and supports the unit as it passes through the front opening. 2. The opening/closing device according to claim 1, wherein tracks that are spaced from each other are arranged near both sides of the unit. 3. The opening/closing device according to claim 2, wherein each track extension is slidably attached to a corresponding track. 4. An opening and closing device according to claim 3, characterized in that the unit includes roller means engageable with the tracks on each side of the unit. 5. A switchgear according to claim 4, wherein the track extension includes means for extending the extension as the unit moves outwardly from the cell. 6. The unit includes a surface that engages the track extension to move the track extension into the cell as the unit moves into the cell. switchgear. 7. Claim 6, characterized in that the opening/closing unit includes a front panel for closing the front opening when the unit is in the cell, said panel including said surface engaging the track extension. The switchgear described in . 8. An opening/closing unit that is detachably disposed within the cell and includes a roller also disposed within the cell; and an opening/closing unit that is disposed within the cell and engages with the roller when the unit is within the cell to support the unit. a fixed track having a support surface; a support surface slidably supported along the fixed track; a first location within the cell; Claims 1 to 7 include a telescoping track that moves between two positions, and the telescoping track is interlocked with the unit so that it can move into and out of the cell together with the unit. The switchgear described in any of the above. 9. Opening and closing device according to claim 8, characterized in that the telescoping track includes means for engaging the unit in order to project the telescoping track together with the unit. 10. Switching device according to claims 8 to 9, characterized in that the unit includes means for engaging the telescoping track for retracting it into the cell. 11. Closing device according to any one of claims 8 to 10, characterized in that the telescoping track includes toothed portions that engage with rollers in order to project it together with the unit from the cell. 12. The telescoping track includes a first support surface that engages the roller when the unit is outside the cell, and the fixed track includes:
a second support surface that engages the roller when the unit is inside the cell; Claims 8 to 11, characterized in that the second support surface is set slightly higher than the first support surface.
The switchgear described in any of the preceding paragraphs.