KR102072330B1 - Load break switch with disconnect switch - Google Patents

Abstract

The present invention relates to a load break switch capable of increasing the lifespan of the load break switch by configuring not only a vacuum circuit breaking unit but also a disconnector to perform a current disconnecting operation. According to the present invention, the load break switch comprises: an epoxy housing (110); a power input terminal (111); a power output terminal (113); a vacuum circuit breaking unit (120) having a movable electrode (125) and a fixed electrode (123); a disconnector (130); a vacuum circuit breaking unit driving unit (150); and a manipulation unit (160), wherein the vacuum circuit breaking unit (120) includes a disconnector contact point (127) and a current carrying member (129), and the disconnector (130) includes a disconnector blade (131) and a blade rod (133).

Description

Epoxy Insulated Load Breaker with Disconnector {LOAD BREAK SWITCH WITH DISCONNECT SWITCH}

The present invention relates to a load switch, and more particularly, to a load switch for disconnecting the energization with the vacuum interrupter and the disconnector.

In general, electricity generated at a voltage of about 20,000 V in various power plants (heat, hydro, nuclear power, etc.) is boosted to ultra high voltage suitable for power transmission, and is transmitted to primary substations through ultra high voltage lines. The primary substation drops the supplied power and supplies it to the secondary substation or to each consumer in general. That is, the power supplied from the primary substation is supplied to the power receiving facilities of each customer through a distribution system composed of overhead distribution lines and underground distribution lines, and is supplied to low voltage consumers through special high voltage consumers, high pressure consumers, and various outdoor transformers.

At this time, the load breaker (LBS) is widely used to supply and stop power for a wide range of customers by being installed at a suitable position on the transmission / distribution system such as line division, branch, and transformer primary side of the high-voltage consumer power distribution panel (hydraulic equipment). It is used. The load breaker can cut off a certain period if power failure work is required by the utility company's plan or due to an accident, and also the electricity supplied to a specific area in case of an accident or failure caused by load in the customer's facilities and systems By quickly shutting down, the damage range is minimized and the accidental current is not spread to other lines.

This load switch controls the power supply by driving the connection to three positions: open, closed, and grounded.

An example of a conventional load switch is disclosed in Korean Patent Laid-Open Publication No. 10-2016-0023445 "Alternative Insulating Gas Underground Multi-Circuit Load Switch".

As described above, the conventional load breaker performs the energization between the power input terminal and the power output terminal by the vacuum interrupter. That is, the circuit is switched to the input, open and ground by the operation of the vacuum interrupter.

However, such a conventional load switch has a problem that stress is placed on the vacuum cut-off part because the vacuum cut-off part is dedicated to blocking the energization. In this case, the life of the vacuum interrupter is shortened and the incident rate is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problem, and to provide a load switch in which energization interruption is performed in addition to the vacuum interrupter.

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention by those skilled in the art.

The object of the present invention can be achieved by a load breaker. The load switch of the present invention, the epoxy housing 110; A power input terminal 111 provided at one side of the epoxy housing 110 to receive power; A power output terminal 113 provided at the other side of the epoxy housing 110 to output power; A vacuum interrupter 120 having a flow electrode 125 electrically connected to the power input terminal 111 and movable up and down, and a fixed electrode 123 facing the flow electrode 125; A disconnector (130) provided between the vacuum interrupter (120) and the power output terminal (113) to selectively connect the vacuum interrupter (120) and the power output terminal (113); A vacuum interrupter driver 150 which moves the flow electrode 125 up and down and is in contact with or separated from the fixed electrode 123; And a manipulator 160 for driving the disconnector 130, and the vacuum interrupter 120 is provided on one side of the fixed electrode 123 to be selectively connected to the disconnector 130. 127; And a conducting member 129 electrically connecting the disconnecting contact 127 and the fixed electrode 123, wherein the disconnecting device 130 is rotated between the disconnecting contact 127 and the power output terminal 113. A disconnecting blade 131 which is coupled to be possible and electrically connects or disconnects the disconnecting contact 127 and the power output terminal 113; One end is coupled to the end of the disconnector blade 131, the other end is coupled to the operation unit 160 to press the blade rod 133 for pressing the disconnector blade 131 by the operation of the operation unit 160. It includes, and is provided to be folded inside the operation unit 160 in the input state and the open state, and is expanded from the operation unit 160 in the ground state is in contact with the disconnecting contact point 127 is input through the power input terminal 111 And a ground blade 140 having a first blade 141 and a second blade 143 for grounding the supplied power, wherein the vacuum blocking unit driving unit 150 and the operation unit 160 are the vacuum blocking unit 120. ) And the disconnecting device 130 are operated in the closing state in the order of the disconnecting unit 130 and the vacuum interrupting unit 120, and in the open state in the vacuum interrupting unit 1200 and the disconnecting unit 130 in order. Characterized by driving All.

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According to one embodiment, the flow electrode 125 is moved toward the fixed electrode 123 in contact with the fixed electrode 123 in the input state, the disconnecting blade 131 is connected to the blade rod 133 It is rotated by both ends may be in contact with the disconnecting contact 127 and the power output terminal 113, respectively.

According to an embodiment, in the open state, the flow electrode 125 is moved away from the fixed electrode 123, and the disconnecting blade 131 is moved by the blade rod 133 in a direction opposite to the input state. Both ends may be rotated to be separated from the disconnecting contact 127 and the power output terminal 113.

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The load breaker according to the present invention, together with the vacuum interrupter disconnects the energization. As a result, the load applied for energization is distributed to the vacuum interrupter and the disconnector, so that the life of the load breaker can be increased.

In addition, there is an effect that the risk factor is reduced by increasing the insulation distance.

1 is a cross-sectional view showing the entire cross-sectional configuration of the load switch according to the invention,
Figure 2 is a perspective view showing the external configuration of the epoxy housing of the load switch according to the invention,
Figure 3 is an exemplary cross-sectional view showing the configuration of the input state of the load switch according to the invention,
4 is an exemplary view illustrating an operation process of a disconnecting switch and a ground blade of a load switch according to the present invention;
Figure 5 is a cross-sectional view showing the configuration of the open state of the load switch according to the invention,
Figure 6 is a cross-sectional view showing the configuration of the ground state of the load switch according to the invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

1 is a cross-sectional view showing the entire cross-sectional configuration of the load switch 100 according to the present invention. As shown, the load switch 100 according to the present invention controls the power supply by driving the connection to three positions of blocking, opening and grounding.

The load switch 100 according to the present invention is provided in the epoxy housing 110 and the epoxy housing 110 is provided with a power input terminal 111 and a power output terminal 113, respectively, the power output terminal from the power input terminal 111 A vacuum interrupter 120 for firstly shutting off electricity to the 113, a disconnector 130 provided between the vacuum interrupter 120 and the power output terminal 113 to disconnect electricity secondly, and a power input terminal ( A ground blade 140 for selectively contacting 111 to ground the power source, a vacuum cut-off unit driver 150 for driving the vacuum cut-off unit 120, and an operation unit for operating the disconnector 130 and the ground blade 140. 160.

180 shown in FIG. 1 represents a transformer and 190 represents a base.

In the load switch 100 according to the present invention, the vacuum interrupter 120 and the disconnector 130 perform energization from the power input terminal 111 to the power output terminal 113. As a result, it is possible to solve the problem that the life of the load switch is shortened because the stress is concentrated in the vacuum breaker by conducting only the vacuum cut-off current in the conventional load switch.

2 is a perspective view showing the external configuration of the epoxy housing 110, Figure 3 is a cross-sectional view illustrating a cross-sectional configuration of the epoxy housing 110 in the input state.

As shown in the epoxy housing 110, the power input terminal 111 and the power output terminal 113 are spaced apart from each other. The epoxy housing 110 is formed by injecting with epoxy in a state in which the vacuum blocking unit 120 and the disconnecting unit 130 are accommodated therein.

The epoxy housing 110 is provided with a voltage sensor 115 and a shield 117. The voltage sensor 115 detects the magnitude of the voltage supplied through the power input terminal 111. The shield 117 is a shielding film that relaxes the electric field.

The vacuum interrupter 120 is provided at the power input terminal 111 to control whether the current flowing from the power input terminal 111 is energized. The vacuum interrupter 120 includes a vacuum housing 121 formed as a vacuum, a fixed electrode 123 fixedly coupled to the vacuum housing 121, and a flow movable up and down under the fixed electrode 123. Electrode 125.

The vacuum housing 121 allows the inside to be maintained in a vacuum. In the vacuum housing 121, the flow electrode 125 moves up and down, and transfers or blocks power flowing through the power input terminal 111 to the fixed electrode 123.

The fixed electrode 123 is fixed to one end of the vacuum housing 121, the flow electrode 125 is moved up and down in contact with the power input terminal 111. As shown in FIG. 3, the flow electrode 125 rises to be in contact with the fixed electrode 123 to energize the power supply to the fixed electrode 123.

On the other hand, in the open state as shown in FIG. 5, the flow electrode 125 descends and is spaced apart from the fixed electrode 123 to block the power supply to the fixed electrode 123.

The flow electrode 125 is driven by the vacuum interrupter driving unit 150 as shown in FIG. 1. The vacuum interrupter driving unit 150 converts the operation of the driving motor to the vertical movement of the flow electrode 125. The insulating rod 126 is coupled to the outside of the floating electrode 125.

And a disconnecting contact 127 provided on one side of the fixed electrode 123, and a conducting member 129 electrically connecting the disconnecting contact 127 and the fixed electrode 123.

An energization member 129 is provided between the vacuum interrupter 120 and the disconnector 130, and a disconnector contact 127 is provided at an end of the energization member 129. The disconnecting contact 127 is connected by the fixed electrode 123 and the conducting member 129 to supply power supplied to the fixed electrode 123 to the disconnecting contact 127.

The disconnector contact point 127 is in contact with or separated from the disconnector blade 131 of the disconnector 130 and supplies or blocks power introduced through the power input terminal 111 to the disconnector 130.

The disconnector 130 is provided between the disconnector contact point 127 and the power output terminal 113 to energize or block power. The disconnector 130 includes a disconnector blade 131 provided to rotate between the disconnector contact point 127 and the power output terminal 113, and a blade rod 133 for rotating the disconnector blade 131.

The disconnecting blade 131 is provided in a bar shape having a predetermined length. The disconnecting blade 131 is rotatably provided around the blade pivot 132 as shown in FIG. 4. The first end 131a and the second end 131b on both sides of the disconnecting blade 131 contact and energize the disconnecting contact 127 and the power output terminal 113, respectively, as shown in FIG. On the other hand, in the open state as shown in Figure 5 is rotated clockwise around the blade pivot 132, the first end 131a and the second end 131b is the disconnection contact 127 and the power output terminal 113 ), And cut off the power supply.

The blade rod 133 is linked to the other end of the disconnecting blade 131 and presses the disconnecting blade 131 to rotate. It is provided in the form of a rod having a predetermined length of the blade rod 133, the upper portion is coupled to the other end of the disconnecting blade 131, the lower portion of the drive arm 163 of the operation unit 160 as shown in FIG. Link is coupled to the rod coupling hole (163a).

When the driving arm 163 is rotated upward along the clockwise direction, the blade rod 133 linked to the rod coupling hole 163a of the driving arm 163 is moved downward (upward in FIG. 4). . As a result, as illustrated in FIG. 5, the disconnecting blade 131 rotates clockwise around the blade pivot 132 and is spaced apart from the disconnecting contact 127 and the power output terminal 113.

On the other hand, when the driving arm 163 rotates downward along the counterclockwise direction, the blade rod 133 moves upwardly (as shown in FIG. 4 downward) as shown in FIG. 3. The disconnecting blade 131 coupled to the blade rod 133 rotates counterclockwise around the blade pivot 132 in association with the rising of the blade rod 133 and the disconnecting contact 127 and the power output terminal 113. ) Is energized.

By the switching operation of the disconnecting unit 130, it is possible to control whether the energization together with the vacuum interrupter 120.

Here, when the vacuum interrupter driving unit 150 and the operation unit 160 operates the vacuum interrupter 120 and the disconnector 130, the vacuum interrupter driving unit 150 and the operation unit 160 are driven in the order of the disconnector 130 and the vacuum interrupter 120. In the open state, the vacuum interrupter 120 and the disconnector 130 are driven in the order. As a result, the disconnector 130 is operated only in a voltageless state.

The ground blade 140 is positioned in a folded state inside the operation unit 160 in the closed state and the open state, as shown in FIG. 1, in the grounded state, as shown in FIG. 6, the ground blade 140 is in contact with the disconnecting contact point 127. Ground the power introduced into the vacuum interrupter 120.

As shown in FIG. 4, the ground blade 140 includes a first blade 141 and a second blade 143 foldably coupled to the first blade 141. The first blade 141 is rotatably coupled around the rotation shaft 142 located on the upper side of the support plate 161. The first blade 141 and the second blade 143 are foldably coupled around the link shaft 144.

 The ground blade 140 is folded and positioned inside the operation unit 160 in the closed state and the open state, and in the ground state, the first blade 141 is rotated toward the vacuum interrupter 120 around the rotating shaft 142. . The second blade 143 is unfolded with respect to the first blade 141 about the link shaft 144.

The unrolled second blade 143 contacts the disconnecting contact 127 to ground the power introduced into the vacuum interrupter 120. The ground blade 140 is expanded or folded by the driving of the operation unit 160. The configuration of the operation unit 160 for driving the ground blade 140 may be a known configuration.

The operation of the load switch 100 according to the present invention having such a configuration will be described with reference to FIGS. 1 to 6.

First, as shown in FIG. 3, during the closing operation, the driving arm 163 of the operation unit 160 rotates to raise the blade rod 133. In connection with this, the disconnecting blade 131 rotates counterclockwise around the blade rotation shaft 132, the first end 131a is in contact with the disconnecting contact 127, and the second end 131b is connected to the power output terminal ( 113).

When the operation of the disconnector 130 is completed, the flow electrode 125 is raised to contact the fixed electrode 123. As a result, the power A introduced into the power input terminal 111 is the flow electrode 125, the fixed electrode 123, the energizing member 129, the disconnecting contact 127, the disconnecting blade 131, and the power output terminal 113. It is energized while going through.

In the opening operation as shown in FIG. 5, the flow electrode 125 descends and is separated from the fixed electrode 123. Then, the blade rod 133 is lowered and the disconnecting blade 131 is rotated clockwise around the blade rotating shaft 132 and is spaced apart from the disconnecting contact 127 and the power output terminal 113.

As shown in FIG. 6, when the ground state (ground operation), the blade rod 133 is kept in a lowered state, the flow electrode 125 is raised. Then, the ground blade 140 is unfolded by the operation of the operation unit 160 and moved to the disconnecting contact point 127. The ground blade 140 is unfolded by the operation of the operation unit 160 and moved to the disconnecting contact point 127.

As a result, the second blade 143 is in contact with the disconnecting contact 127, and the power A introduced into the power input terminal 111 is grounded. When the operation of the ground blade 140 is completed, the flow electrode 125 is raised to contact the fixed electrode 123. As a result, the power A introduced into the power input terminal 111 is grounded through the flow electrode 125, the fixed electrode 123, the conducting member 129, the disconnecting contact 127, and the ground blade 140.

As described above, the load breaker according to the present invention blocks the energization of the disconnector together with the vacuum interrupter. As a result, the load applied for energization is distributed to the vacuum interrupter and the disconnector, so that the life of the load breaker can be increased.

In addition, there is an effect of reducing the risk factor increases the insulation distance.

The embodiment of the load breaker of the present invention described above is merely exemplary, and those skilled in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. There will be. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the above detailed description. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims. It is also to be understood that the present invention includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims.

100: load switch 110: epoxy housing
111: power input terminal 113: power output terminal
115: voltage sensor 117: shield
120: vacuum interrupter 121: vacuum housing
123: fixed electrode 125: flow electrode
126: insulated rod 127: disconnector contact
129: energizing member 130: disconnector
131: disconnector blade 131a: first end
131b: second end 132: blade rotation shaft
133: blade rod 133a: female coupling hole
140: ground blade 141: first blade
142: axis of rotation 143: second blade
144: link shaft 150: vacuum cut-off drive unit
160: operation unit 161: support plate
163: driving arm 163a: rod coupling hole
180: transformer 190: base
A: Power

Claims (6)

An epoxy housing 110;
A power input terminal 111 provided at one side of the epoxy housing 110 to receive power;
A power output terminal 113 provided at the other side of the epoxy housing 110 to output power;
A vacuum interrupter 120 having a flow electrode 125 electrically connected to the power input terminal 111 and movable up and down, and a fixed electrode 123 facing the flow electrode 125;
A disconnector (130) provided between the vacuum interrupter (120) and the power output terminal (113) to selectively connect the vacuum interrupter (120) and the power output terminal (113);
A vacuum interrupter driver 150 which moves the flow electrode 125 up and down and is in contact with or separated from the fixed electrode 123;
It includes an operation unit 160 for driving the disconnector 130,
The vacuum interrupter 120,
A disconnecting contact point (127) provided on one side of the fixed electrode (123) and selectively connected to the disconnecting device (130);
It includes a conducting member 129 for electrically connecting the disconnecting contact 127 and the fixed electrode 123,
The disconnector 130,
A disconnector blade (131) rotatably coupled between the disconnection contact (127) and the power output terminal (113) and electrically connecting or disconnecting the disconnection contact (127) and the power output terminal (113);
One end is coupled to the end of the disconnector blade 131, the other end is coupled to the operation unit 160 to press the blade rod 133 for pressing the disconnector blade 131 by the operation of the operation unit 160. Include,
It is provided to be folded inside the operation unit 160 in the input state and the open state, it is extended from the operation unit 160 in the ground state is in contact with the disconnector contact point 127 to input the power input through the power input terminal 111 A ground blade 140 having a first blade 141 and a second blade 143 for grounding,
When the vacuum cut-off unit driving unit 150 and the operation unit 160 operate the vacuum cut-off unit 120 and the disconnecting unit 130, the disconnecting unit 130 and the vacuum cut-off unit 120 in the input state. And the open circuit breaker, and the vacuum breaker (120) and the disconnector (130) in order to drive the load switch.
delete delete The method of claim 1,
In the input state, the flow electrode 125 moves toward the fixed electrode 123 to be in contact with the fixed electrode 123, and the disconnecting blade 131 is rotated by the blade rod 133 so that both ends thereof are respectively rotated. Load disconnector, characterized in that the contact with the disconnecting contact (127) and the power output terminal (113).
The method of claim 4, wherein
In the open state, the flow electrode 125 is moved away from the fixed electrode 123, and the disconnecting blade 131 is rotated in the opposite direction to the closing state by the blade rod 133 so that both ends of the disconnecting device Load switch, characterized in that separated from the contact point (127) and the power output terminal (113).
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