KR200301490Y1 - Disconnector Safety Device of Gas Insulated Switch-gear - Google Patents

Abstract

The present invention relates to a safety device for disconnecting device of gas insulated switchgear, the control panel unit; An actuator for transmitting power; A first shaft that rotates by a power of an actuator; a second shaft that rotates in proportion to the amount of rotation of the first shaft; a movable contact that closes the disconnector while interlocking with the second shaft; Inertial prevention means for operating in accordance with the rotation of the first shaft to block the power supplied to the actuator to block the inertial movement of the actuator; A first safety member for operating in conjunction with the first shaft to forcibly cut off power to the control circuit; And a second safety member that operates in conjunction with the second shaft and controls the ground prevention switch.

Description

Disconnector safety device of gas insulated switchgear {Disconnector Safety Device of Gas Insulated Switch-gear}

The present invention relates to a gas insulated switchgear, and more particularly to a disconnector safety device of the gas insulated switchgear.

In general, the switching device may be roughly classified into an air insulated switchgear, a solid insulated switchgear, a gas insulated switchgear, and the like according to an insulating medium.

Among them, the gas insulated switchgear is a vacuum container that extinguishes arcs generated at the time of opening and closing, and quickly disconnects the circuit in the event of an accident, and a disconnecting mechanism device for operating the same, and a grounding switch for interrupting the main bus and branch circuits It consists of main circuit equipment such as three-point switch with added function. In case of switchgear with double busbar, there is one disconnector for each busbar. Is designed to supply. Gas insulated switchgear is one of the protection devices installed on the line of power system, and it is usually installed inside the line or switchgear and is useful for repairing or repairing the line.

The disconnecting device of the gas insulated switchgear is installed in the high voltage busbar and is used to open and close the charged line simply under the rated voltage. It does not mainly open and close the load current and does not have the function of blocking the load current. The operation is performed when the breaker or other switch is in the disconnected state.

However, during operation of various equipment, an accident of forgetting the use characteristics of the disconnecting device, and interrupting the live wire flowing through the load current, the arc is generated, and electrical images and electric shock accidents frequently occur. That is, the disconnecting device of the gas insulated switchgear is used for a circuit of high or special high voltage, and is not intended to open and close a normal load current, but to separate a part of a line or a device from a circuit when inspecting and repairing a facility. As used, opening and closing other than no-load current shall not be made. Nevertheless, there have been many cases of forcibly blocking the live, that is, trying to cut off the load current by the switch.

The present invention has been made to solve the above problems, and the object of the present invention is to provide a circuit breaker safety device of a gas insulated switchgear which can prevent damage to the equipment and prevent electrical damage due to misoperation. It is done.

1 is a perspective view of the disconnecting device safety device,

2 is a perspective view showing a connection relationship from an actuator to a disconnecting main body; and

3 is a side cross-sectional view of the disconnecting device safety device.

Explanation of symbols on the main parts of the drawing

20: actuator 30: gear member

40: first shaft 50: second shaft

60: cam member 70: ground prevention pin

80: disconnect main body 81: movable contact

In order to achieve this object, the present invention provides an actuator for transmitting power; A first shaft that rotates by a power of an actuator; a second shaft that rotates in proportion to the amount of rotation of the first shaft; a movable contact that closes the disconnector while interlocking with the second shaft; Inertial prevention means for operating in accordance with the rotation of the first shaft to block the power supplied to the actuator to block the inertial movement of the actuator; A first safety member for operating in conjunction with the first shaft to forcibly cut off power to the control circuit; It provides a disconnecting device safety device for a gas insulated switchgear comprising a second safety member for controlling the grounding prevention switch while operating in conjunction with the second shaft.

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

1 is a perspective view of a disconnector safety device. As shown in FIG. 1, an actuator 20 is installed at one side of the control panel unit 10, and the first shaft 40 is a gear member (30 of FIG. 2) installed at the other side of the control panel unit 10. It is connected to the actuator 20 by the. The second shaft 50 is connected to the first shaft 40 by means of driven and driven Geneva (41, 51 in Fig. 2). Then, one end of the grounding prevention pin 70 detachably installed in the pin insertion hole 71 formed in the control panel unit 10 has a grounding prevention rail groove formed so that both ends thereof pass through the driven Geneva (51 in FIG. 2). 73 is detachably coupled. On the other hand, a cam member 60 is provided outside the control panel portion 10 in the second shaft 50, and the cam member 60 mediates the disconnecting unit main body 80 and the movable contact (81 in FIG. 2). Is connected.

2 is a perspective view showing a connection relationship from the actuator to the disconnecting main body. As shown in Figure 2, the actuator 20 is connected to the first shaft 40 via the gear member 30, the first shaft 40 is driven by the driven and driven Geneva (41, 51) It is connected to the second shaft 50, the second shaft 50 is connected to the disconnecting main body via the cam member 60 and the movable contact 81.

Here, the gear member 30 is the first sprocket 31 is located on the side end of the actuator 20 and the other side of the control panel 10, the first sprocket 31 is a second sprocket by the chain 33 ( 32, the second sprocket 32 is provided on the first shaft (40).

The connection between the first shaft 40 and the second shaft 50 is driven Geneva 51 of the second shaft 50 that is linked to the original Geneva 41 and the original Geneva 41 installed in the first shaft 40. )

In addition, the cam member 60 is a cam 61 installed on the shaft of the second shaft 50 spaced apart from the driven Geneva 51 by a predetermined interval, a rod 62 connected to one side of the cam 61, And it is composed of a connecting body (63) rotatably connected to the pin (62) side end. And, one side of the connecting body 63, the connecting shaft 64 is connected.

One end of the connecting shaft 64 is provided with a movable contact 81, which is located inside the disconnecting main body 80. An on-driven contact point (82 in FIG. 3) is formed on the inner upper surface of the disconnecting main body 80, and a ground-driven contact point (not shown) is formed on the inner rear surface. In addition, the disconnecting main body 80 is provided with a movable contact support (83 in Fig. 3) on the inner lower surface and the side so that the movable contact 81 is rotatable.

3 is a side cross-sectional view of the disconnecting device safety device. As shown in FIG. 3, the inertial prevention member 44 is installed to be operable by the rotation of the first shaft 40, and the first safety member 47 is operable by the flow of the first shaft 40. ) Is installed, and the second safety member 77 is operably installed by the ground prevention pin 70.

The inertial prevention member 44 is an inertial prevention protrusion 42 formed on the outer circumference of the first shaft 40 at regular intervals from the original Geneva 41, and the inertial prevention protrusion 42 in the control panel unit 10. Has an inertial prevention switch 43 so as to be turned on and off.

The first safety member 47 is a circuit blocking protrusion 45 formed at an outer circumference of the first shaft 40 spaced apart from the inertial prevention protrusion 42 by a predetermined interval, and a circuit blocking protrusion 45 in the control panel unit 10. Has a circuit breaker switch 46 so as to be turned on and off.

The second safety member 77 is a ground prevention switch (75) formed on the outer periphery of the ground prevention pin (70), and the ground prevention switch (75) to be turned on and off by the ground prevention protrusion (75) in the control panel (10). 76).

Referring to the operation of the disconnecting device safety device having such a configuration as follows.

When the operator excites the relay by turning on the control switch in the disconnector off state and the ground switch off state, the actuator 20 rotates and constitutes a self-holding circuit, and the actuator continuously rotates.

The actuator 20 rotates the first sprocket 31, and the first sprocket 31 rotates the second sprocket 32 by the chain. When the second sprocket 32 is rotated, the prime mover Geneva 41 and the inertial prevention protrusion 42 installed on the first shaft 40 rotate. When the original Geneva 41 is rotated 180 °, the driven Geneva 51 is rotated 60 ° so that the second shaft 50 is rotated by 60 °. Here, when the second shaft 50 is rotated by 60 °, the movable contact 81 of the three-stage switchgear is operated by 46 ° by the second shaft 50 and the cam member 60 to move the movable contact 81 of the disconnector. ) Are simultaneously closed.

When the rotational motion of the first shaft 40 is completed by 180 °, and the inertial prevention switch 43 is operated by the inertial prevention protrusion 42, the relay is swept and the actuator 20 is stopped from supplying power. The inertial motion of 20 is prevented by the actuator 20 inertia cancellation circuit.

On the other hand, the ground manual operation of the three-stage position switchgear is as follows.

First, when the ground prevention pin 70 coupled to the pin insertion hole 71 is removed, the ground prevention pin 70 is separated into the ground prevention rail groove 73 to release the mechanical ground safety device. In addition, the ground prevention protrusion (75) open the ground prevention switch 76 to the electrical ground safety device is released. Here, the grounding operation is essentially passed through the field check in advance, it is possible to operate after removing the grounding prevention pin (70).

The manual handle is inserted into the manual handle insertion hole 42 and coupled to the side of the first shaft 40. In addition, the operator must apply an external force more than a certain amount in order to rotate the manual handle. In this case, when the operator applies an external force to the manual handle, the first shaft 40 flows in the external force direction, so that the circuit blocking switch 46 is opened by the circuit blocking protrusion 45 to forcibly cut off the current.

According to the disconnecting device safety device having the above-described configuration and action, it is possible to fundamentally prevent the occurrence of misoperation caused by carelessness when handling the disconnector, and to prevent equipment damage and electrical accident due to misoperation.

Claims (5)

In the disconnecting device safety device of gas insulated switchgear, Control panel unit; An actuator for transmitting power; A first shaft rotated by the power of the actuator: A second shaft that rotates in proportion to the rotation amount of the first shaft; A movable contact for closing the disconnector while interlocking with the second shaft; Inertial prevention means for operating in accordance with the rotation of the first shaft to block the power supplied to the actuator to block the inertial movement of the actuator; A first safety member for operating in conjunction with the first shaft to forcibly cut off power to a control circuit; And And a second safety member for controlling the grounding prevention switch while operating in conjunction with the second shaft. The method of claim 1, wherein the interlocking rotation of the first and second shaft Gene Geneva formed on the first shaft; And Disconnector safety device for a gas insulated switchgear, characterized in that made by the driven Geneva formed in the second shaft for rotating the second shaft in proportion to the driven Geneva. The method of claim 2, wherein the inertial prevention means An inertial prevention protrusion formed on an outer circumference of the first shaft; And And an inertial prevention switch unit on and off controlled by the inertial prevention protrusion. The method of claim 2, wherein the first safety member A circuit blocking protrusion formed at an outer circumference of the first shaft; And And a circuit breaker switch on and off controlled by the circuit breaker projecting unit. The method of claim 2, wherein the second safety member A grounding prevention pin detachably installed at a pin insertion hole formed in the control panel; An anti-grounding protrusion installed at an outer circumferential side of the anti-grounding pin; A ground prevention switch controlled on and off by the ground prevention protrusion; And A disconnecting device safety device for a gas insulated switchgear formed in the driven Geneva and including a grounding prevention rail groove into which an end of the grounding prevention pin is inserted.