JPH0252375B2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to improvements in four-pole air breakers and disconnectors.

[Background of the invention]

Generally, power distribution systems used in buildings, for example, are often three-phase, four-wire systems. In the three-phase four-wire system, power loads such as pumps and coolers are used for three phases, for example, A to C phases, and lighting loads are used between each line. These loads are turned on and off using 4-pole air insulators and disconnectors, but if the 4-pole air insulators and disconnectors turn on or off at the same time, an abnormal current will flow, causing damage to, for example, lighting equipment. Since it may damage the ballast etc. of the 4 poles, one pole should not be
I try to turn it on earlier or cut it off later than the poles. Closing and disconnection of the 4-pole air immersion and disconnection switches are performed by a common operating mechanism. For this reason, the operation mechanism section requires a large load necessary for the four-pole air disconnection and disconnection, and as a result, the operation mechanism section cannot be avoided from increasing in size.
In addition, the operating mechanism of a 3-pole air breaker or disconnector has a smaller load than that of a 4-pole breaker or breaker, and the operating mechanism of a 3-pole air breaker or disconnector has a smaller load than that of a 4-pole breaker. It could not be used for the operation mechanism of the disconnector or the disconnector, and the two could not be used together. An example of a conventional four-pole air disconnector is disclosed in Japanese Patent Application Laid-open No. 104370/1983.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air vent and disconnector that can be used in many models by reducing the load on the operating mechanism.

[Summary of the invention]

The four-pole air disconnector of the present invention is provided with a fixed contact and a movable contact respectively, one end of the movable contact is connected to the operating rod via the first pin, and the other end of the operating rod is connected to the operating rod through the first pin. Connected to the blade via the second pin, the blade is provided on the main shaft, and when the movable contact is inserted into the fixed contact due to the load from the operating mechanism provided on the main shaft, there is a reference between the main shaft and the first pin. If you draw a line and place the 2nd pin of one pole pole or disconnector above the reference line and the remaining 2nd pins of the remaining poles or disconnectors below the reference line, the main shaft In this case, the rotating forces of the two-pole air breaker and disconnector cancel each other out, and the remaining load is only needed to rotate the air breaker and disconnector, so the operating mechanism has about half the load compared to the conventional load. That's fine.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

As shown in FIG.
B, 1C, and 1D are arranged in parallel. The three-pole air disconnectors 1A, 1B, and 1C are as shown in Figure 1.
As shown in Figure 2, the 1-pole air breaker and disconnector 1D have the same configuration, so we will explain the 1-pole air breaker and disconnector 1A as examples, and explain other air breaker and disconnector 1A as examples. Explanation of the disconnector will be omitted.

The air disconnector 1A shown in FIG. 1 is constructed as follows. That is, the cart 2, which is movable by wheels 2A, has a front plate 3A and a mounting bracket 3B attached to both ends thereof, and a sheath section base 4 attached to the upper part of the mounting bracket 3B.
Side plates 5 and 6 are attached to both sides of the front plate 2, the mounting bracket 3, and the shingle section base 4. The bow section base 4 has five partition plates 7A and a receiving bracket 7B extending inward, and upper and lower fixed contacts 8.
A and 8B are installed.

The upper fixed contact 8A is electrically connected to and separated from the movable contact 9, and an arc horn 11 extending into the arc extinguishing chamber 10 is attached above both contacts. The lower fixed contact 8B is connected to a flexible conductor 12. A terminal 12A provided on the conductor 12 is connected to the first pin 13. The first pin 13 is inserted between the receiving metal fittings 7B. The receiving fitting 7B is in contact with the shear cutting base 4 and is supported by a fixing pin 14 between the side plates. The movable contact 9 and the hinge 15 are inserted into the first pin 13, and the movable contact 9 is supported by the fulcrum pin 16. Due to the pressure, it comes into contact with the fixed contact 8A. By moving the insulating operation rod 17 in the arrow directions X ₁ and X ₂ , it is electrically connected to and separated from the upper fixed contact 8A.

One end of the insulated operating rod 17 is connected to the hinge 15, but when the hinge is not used, it is connected directly to the first
It may also be inserted into the pin 13. Insulated operation rod 17
The other end is connected to the first blade 19 via the second pin 18, and the first blade 19 is attached to the main shaft 20.

The main shaft 20 is rotatably inserted into a bearing 21 attached between the front plate 3A and the side plates 5, 6.
The main shaft 20 is provided with a first blade 19 and a second blade 22 which are connected to four insulated operating rods 17. The second blade 22 is provided with an operating mechanism section 23 . The operating mechanism section 23 only needs to generate a load that rotates the main shaft 20 clockwise or counterclockwise.
Since a well-known operating mechanism may be used, a detailed explanation of the structure will be omitted.

The four-pole air disconnectors 1A to 1D are the first,
If a reference line Y is drawn between the first pin 13 and the main shaft 20 in the closed state as shown in Fig. 2, the second pins 18 of the three-pole air and disconnectors 1A to CD will be below the reference line Y. On the side, attach the remaining air vents and the second pin 18' of the disconnector 1D.
is placed above the reference line Y. In order to arrange the second pins 18 and 18' in this way,
The angle of the first blade 19 may be changed.

According to this configuration, a load of 3 W in the left direction is applied to the second pin 18 of the three-pole air disconnectors 1A to 1C in FIG. Since the pin 18 is arranged below the reference line Y, a clockwise rotation moment is generated in the main shaft 20 via the first blade 19, and the operating mechanism section 23 receives a downward force 3W ₁ as shown by the arrow. occurs.

On the other hand, the second pin 1 of the air disconnector 10 in FIG.
8' is a load W applied to the left by the contact spring 6A.
However, since the second pin 18' is arranged above the reference line Y, a moment is generated to rotate the main shaft 20 in the counterclockwise direction, and an upward force _W1 is generated in the operating mechanism section 20. .

As a result, the load applied to the operating mechanism section 20 is
3W ₁ −W ₁ = 2W ₁ , so the load applied to the operating mechanism of a conventional 4-pole air breaker or disconnector was 4W ₁ , but in the present invention, the load was reduced to half, so the operating mechanism can be made smaller. For example, the operation mechanism of a three-pole air insulator or disconnector can be fully shared with that of a four-pole air insulator or disconnector.

In the above-mentioned embodiment, the air shield or disconnector 1D may be placed between the three pole air shields or disconnectors, but as in the present invention, the
If you place the air disconnector 1D on one side of the polar air disconnectors 1A to 1C, you can replace the existing three-pole air disconnector 1A.
Since it is only necessary to dispose one pole of air switch or disconnector 1D in ~1C, there is an advantage that assembly is easy. Further, in the above-described embodiments, a four-pole air breaker or disconnector is described, but it can also be used for a three-pole or five-pole air breaker or disconnector.

[Effects of the Invention] As described above, according to the pneumatic breakers and disconnectors of the present invention, the load on the operating mechanism used in a plurality of pneumatic breakers and disconnectors can be reduced.

[Brief explanation of the drawing]

1 and 2 are side sectional views of an air sink and disconnector shown as embodiments of the present invention, and FIG. 3 is a plan view of the air sink and disconnector shown in FIGS. 1 and 2. 1A to 1D...Air disconnection, 8A, 8B...
Fixed contact, 9... Movable contact, 13... First pin, 17... Insulated operating rod, 18... Second pin, 19... First blade, 20... Main shaft, Y... Reference line.

Claims (1)

[Scope of Claims] 1. A fixed contact and a movable contact are provided in each of a plurality of line breakers arranged in parallel, and an operating rod is connected to the movable contact via a first pin, and the other operating rod is provided with a fixed contact and a movable contact. a first blade connected to the end via a second pin;
It consists of an operating mechanism section connected to the first blade,
In devices that operate the operation mechanism to insert and cut a movable contact into a fixed contact, a reference line is drawn between the main shaft and the first pin, and the A shingle breaker characterized in that the pin is arranged above the reference line, and the second pin of the remaining shingle breaker is arranged below the reference line. 2. The sheath breaker according to claim 1, wherein the second pin breaker disposed above the reference line is arranged on one side of the plurality of sheath breakers.