JPH0743874Y2 - Power switch incomplete detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a power switch incomplete entry detection device for detecting incomplete entry of a plurality of contact devices connected to a power supply.

(Prior Art) Most substations in Japan are unmanned substations controlled by a remote monitoring device. FIG. 4 shows the outer shape of the power switch device 70 of the substation, and the power switch device 70 is provided with a plurality of contact devices 7 as shown in FIG. Each power E _1, E ₂ ... E _n via a contact device 7, and is connected to the load L _1, L ₂ ... L _n such as a control circuit. The contact device 7 is mechanically constructed as shown in FIG.

Reference numerals 8 and 9 are vertical conductors arranged to face each other, and their central portions are made to project symmetrically inwardly in a> shape to form fixed contacts 10 'and 11'. Above the vertical conductors 8 and 9, support members 13 and 14 made of an insulating material that are symmetrically projected inward are provided. A spring 15 is inserted and fixed between the opposing end surfaces of the support members 13 and 14. Therefore, the vertical members 8 and 9 are fixed contacts 10 'and 11'.
If the movable contact, which will be described later, does not completely "engage", the leaf spring
By 12, the upper side is displaced inwardly via the spring 15. A movable contact mechanism 16 is arranged in the central portion formed by the vertical conductors 8 and 9. Reference numeral 1'is, for example, a disk-shaped main body, and movable contacts 17,1 made of, for example, a longitudinal member having a circular cross section on the outer periphery of the main body 1'protruding 180 °.
8 are symmetrically formed as one. A rotary shaft 2 is attached to the main body 1 ', and the movable contact mechanism 16 can be rotated by rotating the rotary shaft 2. In this case, the rotary shaft 2 is attached so as to penetrate the main bodies of the movable contacts of the plurality of contact devices 7 at the same position.

In the state shown in FIG. 6, the fixed contacts 10 ', 11' and the movable contacts 17,
Not in contact with 18. By rotating the rotary shaft 2 penetrating the main body 1'of the movable contacts of the plurality of contact devices 7 in the direction of the arrow, all the movable contacts 17, 18 resist the spring force of the leaf spring 12 and the fixed contacts 10 '. , 11 ', and both contacts come into contact with each other while being spring-supported.

(Problems to be solved by the invention) However, according to the power switch device having such a configuration, when the power switch is turned “on”, the movable contacts 17 and 18 are in the state of FIG. 7 (b), That is, the movable contact
The end faces of 17, 18 are not securely supported by the tips of the fixed contacts 10 ', 11' with spring force, and the tip side faces of the movable contacts 17, 18 are on the side faces near the tips of the fixed contacts 10 ', 11'. In the state of contact, in other words, in the state of incomplete “ON”, there is a case where a person feels a twisting resistance, misidentifies it as “ON”, and leaves the substation. Then, sometimes the contacts are separated due to vibration and the control power supply is cut off, and the operation of the substation becomes impossible. In order to restore, it is necessary to have local personnel for the restoration work, downtime becomes long, and the influence on the power system will be great.

The present invention is intended to solve the above-mentioned problems existing in the conventional power switch device of this kind without making a large modification to the device itself.

(Means for Solving Problems) The present invention is premised on a power switch device having the configuration shown in FIGS. 4 to 7B.

A contact device having at least one incompletely-moving movable contact in which the contact position of the movable contact connected to the power source with the fixed contact on the rotation direction side is set back is provided.

(Embodiment) The present invention will be described with reference to an embodiment shown in FIGS.

FIG. 1 shows a movable contact according to the present invention. 1
Is a movable contact, for example, a circular main body, and 3 and 4 are symmetrically integrally formed, for example, in a circular cross section at a position inclined 180 ° on the outer circumference of the main body 1. The contact points 3 and 4 are different from the conventional movable contacts 17 and 18 in that predetermined cutouts 5 and 6 are formed in a part of the end faces which are in a crossing position with each other and in a parallel portion which is continuous with the end faces.

In the present embodiment, the notch is formed in the movable contact 3 as shown at 6 on the lower side in FIG. 1 and at the movable contact 4 as shown as 5 on the upper side. Depending on the rotating direction of the movable contact 3, it is formed above the movable contact 3 and below the movable contact 4. It may be formed on the upper side and the lower side of the movable contacts 3 and 4, respectively. In the above, the movable contacts 3 and 4 according to the present invention are replaced with the conventional movable contacts 17 and 18.
This is an example of the case where the movable contacts 3 and 4 are formed on the premise of the shape and dimensions of the contact device 7 as will be described later. At this time, it is only necessary to satisfy the condition that the fixed contacts 10 'and 11' are not contacted.
A narrower diameter or a narrower width may be used over the entire length.

That is, the movable contact may be provided such that the fixed contact and the movable contact of the plurality of contact devices do not contact the fixed contact at the position of incomplete contact, and the contact portion is displaced at the position of complete contact. For example, the shape can be appropriately selected.

At least one contact device having the movable contacts 3 and 4 having such a configuration is provided. Then, the rotary shaft 2 attached to the body 1 of the movable contacts 3 and 4 penetrating the body 1 ′ of the movable contacts 17 and 18 of the plurality of contact devices 7 is attached to the body 1 ′.
Install in the same position as in. At that time, in order to bring the movable contacts into contact with the fixed contacts of the plurality of contact devices 7, the rotary shaft 2 attached through the main bodies 1, 1 ′ of the plurality of movable contacts is rotated in a predetermined direction. , Incomplete "on"
If so, a movable contact other than the movable contact according to the present invention
Although 17,18 make contact as shown in FIG. 7 (b), since the movable contacts 3,4 according to the present invention are provided with notches 5 and 6, for example, as shown in FIG. The movable contacts 3 and 4 do not contact the fixed contacts 10 and 11.

Therefore, as shown in FIG. 3, the fixed contact and the movable contact of the plurality of contact devices 7 are closed by incomplete "on", but the fixed contacts 10 and 11 of the contact device using the movable contacts 3 and 4 according to the present invention. And the movable contacts 3 and 4 do not close. Thus the fixed contacts 10, for example to the positive side of the power supply E _2, one end of the fault indicator lamp Lp with connecting 11 to the negative side through the relay Ry, for example to the positive side of the power supply E _n, the other relay Ry If the relay is connected to the minus side via the drop contact Ry ′, the relay Ry drops and the drop contact Ry ′ is closed, and the error indicator Lp lights up to warn of incomplete “ON”. Fully "turned on" by rotating the rotating shaft 2 enough
Then, the movable contacts of all the contact devices come into contact with each other while their both end faces are supported by the fixed contacts with spring force, as shown in FIG. 7 (a). When Ry ′ is open, the error indicator Lp does not light.

In the above-mentioned embodiment, the contact device group 70 of the present invention is newly added while keeping the configuration of the conventional contact device group 70.
Although the example in which 10, 11 are provided has been described, instead, the movable contacts 17, 18 of at least one contact device 7 in the conventional contact device group 70 are replaced by the movable contacts 3, 4 according to the present invention.
As shown in FIG. 3, a relay Ry is connected to the fixed contacts 10 'and 11' paired with the movable contacts 3 and 4 as shown in FIG.
Even if the abnormality indicating lamp Lp is turned on by closing the drop contact Ry ′, the object of the present invention can be achieved in the same manner.

(Effects of the Invention) The main effects of the present invention are as follows.

1) It is not necessary to modify the entire existing power switch, and for example, a contact device having a movable contact that is simply processed as shown in FIG. 1 is added, or one of a plurality of contact devices is used. Since it is sufficient to simply process the movable contact as shown in FIG. 1, the movable contact can be easily implemented regardless of the existing wiring.

2) As a result, it is possible to prevent inoperability of a substation or the like for a long time caused by an incomplete “turn-on” of the power switch.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a movable contact according to the present invention,
2 is a front view showing the operation of the movable contact according to the present invention in the case of incomplete "ON", FIG. 3 is a circuit diagram showing the overall configuration of the present invention, and FIG. 4 is used in a substation or the like. FIG. 5 is a front view of the power switch device, FIG. 5 is a circuit diagram showing a contact group in the power switch device, and FIG. 6 is a partial sectional front view showing details of a mechanism example of the contact device shown in FIG. FIG. 7 (a) is a front view showing a state where the contact device shown in FIG. 6 is completely “inserted”, and FIG. 7 (b) shows a state where the contact device shown in FIG. 6 is incomplete “inserted”. It is a front view. 1,1 '... Movable contact body 2 ... Rotary shaft 3,4,17,18 ... Movable contact 8,9 ... Vertical conductor 10,11,10', 11 '... Fixed contact 13,14 ... Support member 15 ... Spring E ₁ , E ₂ … E _n … Power supply L ₁ , L ₂ … L _n … Load

Claims (1)

[Scope of utility model registration request] 1. A vertical conductor provided with a contact protruding inwardly in a> shape in a central portion is provided to face each other, and a support member made of an insulator symmetrically protruding inward is provided above the vertical conductor. A fixed contact in which the vertical conductor is spring-supported so as to be displaced inward from each other in a state in which a spring is inserted and fixed between opposed end surfaces of the respective support members,
A contact device, which is arranged in the central portion of the space formed by the vertical conductors and includes a rotatable movable contact body having movable contacts in which the conductors are protruded and fixed at 180 °, and a rotatable movable contact body, is connected to each power source and each load. In which the fixed contact and the movable contact of the plurality of contact devices are brought into contact by rotating the rotating shaft that is inserted through the movable contact bodies of the plurality of contact devices. An incomplete entry detecting device for a power switch, comprising a contact device having at least one incomplete entry movable contact in which a contact position of a movable contact with a fixed contact on a rotation direction side is set back.