JPH01289031A - Interlock device for molded-case circuit-breaker - Google Patents

Abstract

PURPOSE:To enable the turning on operation of one molded-case circuit-breaker to cause the turning off operation of the other molded-case circuit-breaker in two molded-case circuit-breakers mounted within a switch board by operating the circuit-breakers through rotational drive from the outside thereof. CONSTITUTION:Molded-case circuit-breakers 11, 12 are provided within a switch board closed by a door, not shown in the figure. Each circuit-breaker 11, 12 is provided with a handle manipulation mechanism 13, 14 of identical structure, and these are operated by a release 32 in a interlocked manner. A handle of the circuit-breaker is inserted into a hole 24 of a driving member 20, and turning of or off operation is carried out as the driving member 20 is rotated about an axis 21 from the outside. An engaging member 27 is rotated by turning on operation to lock the door, not shown in the figure. When one driving member 20 is in the ON state, the other driving member 20 is locked in the OFF state by the release 32 interlocked with the one driving member.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention provides a method for connecting two circuit breakers installed inside a switchboard and operated on and off by a handle operating device. This invention relates to an interlock device for a circuit breaker for interlock six wirings.

(Prior Art) Conventionally, a wiring breaker is provided with a lever-shaped handle that projects forward, and is turned on and off by reciprocating the handle. FIG. 6 shows a conventional interlock device in which two such circuit breakers are attached to a power distribution board and these circuit breakers are interlocked. That is,
1 and 2 are first and second wiring circuit breakers installed on a power distribution board (not shown), and these have a handle 3 on the front.
and 4 are provided. Reference numeral 5 designates a first lock plate having a triangular shape. This is mounted on the switchboard near the handle 3 so as to be rotatable via a support shaft 6, and the top corner on the handle 3 side is connected to the locking part. It is set as 5a. Reference numeral 7 denotes a second lock plate having a triangular shape. This is mounted on the switchboard near the handle 4 so as to be rotatable via a support shaft 8, and the top corner on the side of the handle 4 is connected to the locking part. It is set as 7a.

9 is a connecting rod, which connects the first and second lock plates 5 and 7.
The apex portions on the opposite side from the lock portions 5a and 7a are connected.

In this interlock device, for example, when the handle 3 of the first wiring breaker 1 is moved upward to turn on the first wiring breaker 1, the handle 3 is moved to the lock portion 5a of the first lock plate 5. to rotate the first lock plate 5 in the direction of arrow A.

Then, the second lock plate 7 is rotated in the direction of arrow B via the connecting rod 9, and the lock portion 7a comes into contact with the handle 4.

In this state, even if you try to move the handle 4 upward to turn on the second circuit breaker 2, the lock portion 5a of the first lock plate 5 will come into contact with the side surface of the handle 3, and Since the lock plate 7 cannot be rotated in the direction opposite to arrow B, the second lock plate 7 cannot be rotated in the opposite direction of arrow B (cannot be turned on).

The same applies when the first wiring breaker 1 is turned off and the second wiring breaker 2 is turned on, so that the first and second wiring breaker
The circuit breakers 1 and 2 are interlocked to prevent them from being turned on at the same time.

(Problem to be Solved by the Invention) However, in a power distribution board, such as a control center, in which the front side of a storage chamber in which a wiring breaker is installed is closed with a door, the handle is housed in the front part of the wiring breaker. A handle operating device is provided, a knob of the handle operating device projects forward from a hole in the door, and the wiring breaker is turned on and off by rotating the knob.

In such switchboards, the handle of the wiring breaker is housed and hidden within the handle operating device, making it no longer possible to use the above-mentioned interlock device. There was a demand for an interlock device that could be applied to switchboards.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an interlock between two wiring circuit breakers that are installed inside a power distribution board and operated by a handle operating device. We are in the process of providing equipment.

[Structure of the Invention] (Means for Solving the Problems) The interlock device for a wiring breaker of the present invention has an interlock device that adjusts the operation displacement of the knob in correspondence with the ml and the second wiring breaker installed in the switchboard. first and second handle operating devices each having an interlocking mechanism for transmitting the signal to the handles of the first and second wiring circuit breakers to turn on and off the circuit breakers; A locking mechanism that operates between the interlocking mechanisms of the handle operating devices when either of the two handle operating devices is turned on, restrains the other interlocking mechanism and locks the knob of the other handle operating device from being turned on. It is characterized by its configuration.

(Function) According to the interlock device for a wiring breaker of the present invention, when either the knob of the first or second handle operating device is turned on, the interlocking mechanism changes the operating displacement of the knob to the handle. The wiring breaker is turned on. At the same time, the locking mechanism operates to restrain the other interlocking mechanism and lock the knob of the handle operating device so that it cannot be turned on. Therefore, when the first wiring breaker is turned on, the second wiring breaker cannot be turned on. Second
Similarly to the above, when the first wiring breaker is turned on, the first wiring breaker cannot be turned on.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5.

First, in FIG. 3, reference numerals 11 and 12 are first and second wiring circuit breakers installed on a power distribution board such as a control center (not shown), and correspondingly there are switches 11 and 12 on the front panel for turning these on and off. A first and a second handle operating device 13.14 are provided.

Next, the first and second handle operating devices 13 and 14
Since both devices have the same configuration, the first handle operating device 13 will be explained with reference to FIG. 5, and the explanation of the second handle operating device 14 will be omitted. Reference numeral 15 designates a base of the first handle operating device 13, and a cylindrical portion 16 is formed in the center of the base, and a long hole 17 is formed in the side I215a of the base 15. 1
Reference numeral 8 denotes a knob with a bottle 18b protruding from an eccentric position on the back surface of the disc part 18a.This knob is rotatably supported by the base 15 by fitting the disc part 18g into the cylindrical part 16, and its rotation range is limited. is regulated in the range from the "ON" position shown in FIG. 3 through the rOFFJ position to the rREsETJ position. 19 is a locking part formed on knob 18, which is a locking part formed on knob 18.
It is formed by cutting out a part of the outer periphery of the distal end portion of the disc portion 18a of No. 8 that protrudes into the base 15 into a substantially U-shape. Reference numeral 20 denotes a driving member, whose one end bent into an abbreviated shape is rotatably supported by a support shaft 21 attached to the back side of the base 15, and is inserted into the support shaft 21. It is biased to rotate in the direction of arrow C by a torsion coil spring 22. A long hole 23 is formed in the folded portion on the other end side of the driving member 20, and a hole 24 is formed in the central portion between both ends. The pin 18b of the knob 18 is inserted into the elongated hole 23 and is prevented from coming out by a stop ring 25, and the handle lla of the first wiring breaker 11 is inserted into the hole 24. Therefore,
When the knob 18 is rotated in the direction indicated by the arrow or in the direction opposite to the arrow, the drive member 20 is rotated about the support shaft 21 in the direction opposite to the arrow C or in the direction of the arrow C.
Move la upward or downward. The first wiring breaker 11 is turned on by upward movement of the handle lla, and turned off by downward movement thereof.Therefore, the pin 18b1 of the knob 18, the drive member 20, controls the operational displacement of the knob 18 by the handle lla. This constitutes an interlocking mechanism 26 that transmits the signal to turn on and off the first circuit breaker 11. Reference numeral 27 denotes an engaging member, which is rotatably provided on the base 15 via a support shaft 28 different from the support shaft 21, and whose negative end protrudes outward from the elongated hole 17 of the base 15. ing. Further, a claw portion 27g that engages and disengages from the locking portion 19 of the knob 18 is integrally formed at the other end of the engaging member 27.
A bent piece 2 that comes into contact with the protruding piece 2a of the drive member 20 is provided in the middle part.
7b is formed. This engaging member 27 is urged to rotate in the direction of arrow E by a tension coil spring 29 stretched between it and the base 15, and when the knob 18 is set at the roFFJ position, the bending piece 27b is driven. It stops at a position where it abuts against the protruding piece 20a of the member 20. Note that the knob of the second handle operating device 14 is indicated by the reference numeral 30, and the interlocking mechanism is indicated by the reference numeral 31.

Now, in FIGS. 3 and 4, 32 is the interlocking mechanism 26
．． With the release as a locking mechanism provided between 31 and 31,
This is composed of an outer tube 33 and an inner wire 34 inserted into the outer tube 33 so as to be able to reciprocate. Of these, both ends of the outer tube 33 are fixed to the bases 15 of the first and second handle operating devices 13 and 14, respectively, and one end 34a of the inner wire 34 is connected to the first handle operating device 13. base 15
The other end 34b protrudes into the base 15 of the second handle operating device 14 and is disposed opposite to the drive member 20 of the interlocking mechanism 26, and the other end 34b protrudes into the base 15 of the second handle operating device 14 and faces the drive member 20 of the interlocking mechanism 31. It is located. In addition, 35 is a first and second wiring circuit breaker 13 and 1 in order to lock the door in the closed state when the door of the switchboard (not shown) is closed.
This is an interlock piece provided on the door corresponding to each engagement member 27 of No. 4.

Next, the operation of the above configuration will be explained.

As shown in FIGS. 3 and 4, the knobs 18 and 30 are ro
First and second wiring circuit breakers 11 located at the FFJ position
and 12 are off, the bent pieces 27b of both the engaging members 27 of the first and second handle operating devices W13 and 14 are in contact with the protruding piece 27a of the driving member 27. A gap is formed between both ends 34a and 34b of the inner wire 34 of the locking mechanism 32 and the interlocking mechanisms 26 and 31, and the knobs 18 and 30 of the first and second handle operating devices 13 and 14 are spaced apart from each other. is indicated by the arrow “O”
It is in a state where it can be rotated in the direction of the "N" position. At this time, both engaging members 27 are disengaged from the interlock piece 35, and the door can be opened and closed freely.

From the state shown in FIGS. 3 and 4, the door (not shown) is closed, and either the knob 18 or 30, for example, the knob 18, is turned off.
When the rotation operation is performed in the direction of arrow C toward the "ON" position, the drive member 20 of the interlocking mechanism 26 is rotated in the opposite direction of arrow C, and following the rotation of the drive member 20, the engagement member 27 is pulled. It is rotated in the direction of arrow E by the elastic force of the coil spring 29. This rotation of the engaging member 27 is caused by the locking portion 19 of the knob 18.
Before the claw portion 27a enters the interlock piece 3, one end
5, the knob 18 is rotated to the "ON" position and the door (not shown) is locked in the closed state.

Then, as the drive member 20 of the interlocking mechanism 26 rotates in the direction opposite to the arrow C, the handle 11a moves upward as indicated by the arrow F in FIG. 5, and the first wiring breaker 11 is turned on.

On the other hand, when the drive member 20 of the interlocking mechanism 26 rotates in the opposite direction of arrow C as described above, the drive member 20 comes into contact with the end 34a of the inner wire 34 of the lock mechanism 32 as shown in FIG. Push this up. As a result, the inner wire 34 moves in the direction of the arrow G, pushing down the end portion 34b and bringing it into contact with the drive member 20 of the interlocking mechanism 31. As a result, rotation of the drive member 20 of the interlocking mechanism 31 is restricted,
The knob 31 cannot be rotated in the direction of the arrow toward the rONJ position, and the second wiring breaker 12 is locked in the off state and cannot be turned on.

Also, from the state shown in Figures 3 and 4, turn knob 31 to "ON".
” position in the direction of the arrow to turn on the second wiring breaker 12, the first
The wiring circuit breaker 11 is locked in the off state and cannot be turned on.

[Effects of the Invention] As described above, the present invention provides a locking mechanism between the interlocking mechanisms of the first and second handle operating devices, which is activated by the ON operation of either one and disables the ON operation of the other. Therefore, even if the circuit breaker is operated by a handle operation device, when the negative circuit breaker is turned on, the other circuit breaker cannot be turned on. It has the excellent effect of being able to interlock with the

[Brief explanation of the drawing]

1 to 5 show an embodiment of the present invention, and FIG. 1 is a back view when the first wiring breaker is turned on;
Fig. 2 is a perspective view from the front, Fig. 3 is a view corresponding to Fig. 2 when both the first and second circuit breakers are in the OFF state,
FIG. 4 is a back view of the same, and FIG. 5 is a perspective view of the handle operating device seen from the back side. FIG. 6 is a diagram showing a conventional interlock device for a circuit breaker. In the figure, 11 is a first wiring breaker, 12 is a second wiring breaker, 13 is a first handle operating device, 14 is a second handle operating device, 18 and 30 are knobs, 26 and 31 indicates an interlocking mechanism, and 32 indicates a release (locking mechanism). Figure 1 F! I z Figure 5

Claims (1)

[Claims] 1. Provided corresponding to the first and second wiring sheath disconnectors attached to the switchboard, and transmitting the operation displacement of the knob to the handles of the first and second wiring sheath disconnectors. A first and a second interlocking mechanism that turns on and off the shield disconnector.
It is provided between the handle operating device and the interlocking mechanism of the first and second handle operating devices, and when either of the handle operating devices is turned on, it operates to restrain the interlocking mechanism of the other. An interlock device for a wiring shear disconnector, comprising a locking mechanism that locks a knob of a handle operating device so that it cannot be turned on.