CN213959754U - Load access equipment - Google Patents
Load access equipment Download PDFInfo
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- CN213959754U CN213959754U CN202022246970.3U CN202022246970U CN213959754U CN 213959754 U CN213959754 U CN 213959754U CN 202022246970 U CN202022246970 U CN 202022246970U CN 213959754 U CN213959754 U CN 213959754U
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Abstract
An embodiment of the present application provides a load access device, where the load access device includes: a first load switch connected to an incoming line of a load; the second load switch is connected to the outgoing line of the load; the third load switch is positioned on a connecting line, wherein the connecting line is connected with an incoming line of the load and an outgoing line of the load; the third load switch forms a mechanical lock with at least one of the first load switch and the second load switch; in a first switching state of the mechanical lock, the third load switch is closed, and the first load switch and the second load switch are opened; in a second switching state of the mechanical lock, the third load switch is open and the first load switch and the second load switch are closed.
Description
Technical Field
The utility model relates to a railway electric power field especially relates to a load access device.
Background
With the rapid development of railway networks, the problem of shared channels among different railway lines is increasingly remarkable, and different lines are often different in construction period, and power equipment of line segments cannot be synchronously implemented. Therefore, the existing line construction problem when the power equipment is accessed on the earlier implemented line and the line segment is ensured to be more and more concerned and emphasized by the operation unit and the construction unit. Among them, the problem of hanging loads by the power through-line is the most prominent.
The conventional construction method for hanging the load on the electric through line comprises the steps of firstly laying the electric through line; when the line construction is carried out later, the power through line is disconnected by using the skylight point, the power through line inlet port of the cable butt joint box is connected with the through line inlet cable, and the power through line outlet port of the cable butt joint box is connected with the through line outlet cable; adding a cable for connecting a load incoming line end of the cable butt-joint box and a load incoming line end; and the power outlet end of the load and the load outlet end of the cable butt-joint box.
The conventional cable butt-joint box inevitably needs to be constructed in a power failure mode at skylight points and needs to be completed by a plurality of skylight points when the construction conditions are complex, so that the construction difficulty is high, and the cost is high; and after construction, two cable butt-joint boxes are arranged, so that the number of fault points of the power through line is increased, the power supply reliability of the railway power through line is greatly influenced, and potential safety hazards are easily caused.
Disclosure of Invention
An embodiment of the utility model provides a load access device.
The embodiment of the utility model provides a technical scheme is realized like this:
an embodiment of the utility model provides a load access equipment, load access equipment includes:
a first load switch connected to an incoming line of a load;
the second load switch is connected to the outgoing line of the load;
the third load switch is positioned on a connecting line, wherein the connecting line is connected with an incoming line of the load and an outgoing line of the load;
the third load switch forms a mechanical lock with at least one of the first load switch and the second load switch;
in the above scheme, when the mechanical latch is in the first switch state, the third load switch is closed, and the first load switch and the second load switch are opened;
when the mechanical latch is in a second switch state, the third load switch is open and the first load switch and the second load switch are closed.
The load access device further comprises: a first isolation switch and a second isolation switch;
the first isolating switch is connected to the incoming line of the load and is positioned at the front end of the first load switch;
the second isolating switch is connected to the outgoing line of the load and is located at the rear end of the second load switch.
In the foregoing solution, the load access device further includes: a first metal oxide arrester, a second metal oxide arrester, a third metal oxide arrester and/or a fourth metal oxide arrester;
the first metal oxide arrester is connected between the first load switch and the grounding point;
the second metal oxide arrester is connected between the second load switch and the grounding point;
the third metal oxide arrester is connected between the second isolating switch and the grounding point;
and the fourth metal oxide arrester is connected between the first isolating switch and the grounding point.
In the foregoing solution, the load access device further includes: a first charged display device, a second charged display device, a third charged display device and a fourth charged display device;
the first charged display device is connected between the first load switch and a grounding point;
the second charged display device is connected between the second load switch and the grounding point;
the third electrified display device is connected between the second isolating switch and the grounding point;
and the fourth charged display device is connected between the first isolating switch and the grounding point.
In the foregoing solution, the load access device further includes:
and the incoming line and the outgoing line of the load are connected with different ports of the same power through line.
In the foregoing solution, the load access device further includes: a cable splice box; the cable junction box includes: a first port, a second port, a third port and a fourth port;
the first port is an inlet port of the power through line;
the fourth port is an outgoing port of the power through line;
the second port and the third port are connected with the load;
an incoming line of the load is connected between the first port and the second port;
and an outgoing line of the load is connected between the third port and the fourth port.
The embodiment of the utility model provides an in, through third load switch in the load access equipment, with the mechanical shutting of first load switch and the at least one formation of second load switch, link up the switching of line circuit flow direction, ensured hanging the in-process, the circuit link up the circuit and still keep the route, need not the broken circuit and link up the circuit and be under construction, reduce the manual work and the time cost of skylight point construction to the at utmost. After the load hitching is completed, the load path can be completed by adjusting the mechanical locking state, the reverse connection process is simple, and the operation is convenient. When the later stage is maintained and is changed the load, also can utilize the utility model discloses overhaul and change the load that articulates under the circumstances of not cutting off the power supply of link-up line, the operation is convenient, reduces the manual work and the time cost of maintenance. The utility model discloses a predetermine a load access equipment on electric power through line, can carry out the access that electric power through line newly-increased load, reduce butt joint case quantity to make electric power through line fault point reduce, improved the power supply reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a partial circuit diagram of a load access apparatus provided by the present invention;
fig. 2 is a general circuit diagram of the load access device provided by the present invention
Fig. 3 is a block diagram of a load access apparatus provided by the present invention;
fig. 4 is a flowchart of a power line feedthrough method for load access according to the present invention;
fig. 5 is another flowchart of a power line feedthrough method for load access provided by the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings, and the described embodiments should not be considered as limitations of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
In the present application, the embodiments and features of the embodiments may be arbitrarily combined with each other without conflict. Although a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than presented herein.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to be limiting of the invention.
Fig. 1 is a partial circuit diagram of a load access device provided by the present invention. As described with reference to fig. 1, the load access device includes a first load switch 111, a second load switch 112, and a third load switch 113. A first load switch 111 connected to the incoming line 101 of the load; a second load switch 112 connected to the outgoing line 102 of the load; and the third load switch 113 is located on a connection line, wherein the connection line 103 is connected with the incoming line of the load and the outgoing line of the load.
Further, the third load switch forms a mechanical lock with at least one of the first load switch and the second load switch;
wherein when the mechanical latch is in a first switch state, the third load switch is closed, and the first load switch and the second load switch are open; when the mechanical latch is in a second switch state, the third load switch is open and the first load switch and the second load switch are closed.
In particular, the load switch is a switching device between a circuit breaker and a disconnector, having a simple arc-extinguishing device, capable of interrupting rated load currents and a certain overload current, but not short-circuit currents.
The load switch may be divided into a high voltage load switch and a low voltage load switch according to a use voltage. The high-voltage load switches mainly include a solid gas-producing high-voltage load switch, a compressed gas high-voltage load switch, an SF6 high-voltage load switch, an oil-immersed high-voltage load switch, a vacuum high-voltage load switch and the like. Depending on the application, the application is not particularly limited.
In some embodiments, as shown in fig. 1, the third load switch forms a mechanical latch with the first load switch; in other embodiments, the third load switch may also form a mechanical lock with the first load switch;
the utility model discloses in through setting up third load switch, with first load switch with the mechanical shutting that at least one of second load switch formed, all can realize deciding that electric power link up the line and pass through the direct play of third load switch or process the effect of flowing out behind the load realizes the switching of electric power link up the line circuit flow direction.
It should be noted that, the mechanical locking is a locking requirement that the sequential actions are achieved by mechanical mechanisms that are restricted and linked with each other between the operation parts of the switch cabinet or the outdoor knife switch. The mechanical lock does not need to use keys and other auxiliary operations in the operation process, and can realize correct operation along with the operation sequence and automatic step-by-step unlocking. When misoperation occurs, automatic locking can be realized, and the misoperation is prevented from being carried out. The mechanical locking can meet the requirements of forward locking and reverse locking, and has the advantages of visual locking, difficult damage, small overhauling workload, convenient operation and the like. Depending on the application, the application is not particularly limited.
In the present invention, the mechanical latch is used to realize the reverse latch requirement, as shown in fig. 1, the mechanical latch is composed of the third load switch and the first load switch, when the mechanical latch is closed at the third load switch, the first load switch is automatically disconnected under the action of the linked mechanical mechanism, and at this time, the mechanical latch is in the first switch state; on the contrary, when the third load switch is switched off, the first load switch is automatically closed under the action of the linked mechanical mechanism, and at the moment, the mechanical lock is in a second switch state.
Specifically, when the mechanical latch is in the first switch state, the third load switch is closed, so that the connection line 103 is connected, the path of the circuit through line is ensured in the load hooking process, the construction for connecting the load can be performed without disconnecting the circuit through line, and the labor and time costs for skylight construction are reduced to the maximum extent. Meanwhile, the first load switch and the second load switch are disconnected, so that the incoming line 101 and the outgoing line 102 of the load are in a disconnected state, the charged circuit through line is isolated from the load connection port of the cable butt-joint box, and the load connection port of the cable butt-joint box is in an electroless state in the load hanging process, so that a constructor can directly hang the load, the hanging process is simple, and the operation is convenient.
Further, after the load hanging is finished, the mechanical locking state is adjusted to a second switch state. And the third load switch is switched off, the first load switch and the second load switch are switched on, and the current of the circuit through line is output after passing through the load, so that a new load path is added.
Moreover, through freely adjusting machinery shutting state can also be when the later stage is maintained or is changed the load, overhauls and changes the load under the circumstances that the circuit link-through line does not have a power failure, and the operation is convenient, reduces the manual work and the time cost of maintenance.
In some embodiments, referring to fig. 2, the load access apparatus further comprises: a first isolator switch 121 and a second isolator switch 122; the first isolating switch 121 is connected to the incoming line of the load and located at the front end of the first load switch 111; the second isolating switch 122 is connected to the outgoing line of the load, and is located at the front end of the second load switch 112.
Specifically, the isolating switch is a switching device which is mainly used for isolating a power supply, switching operation and connecting and disconnecting a small current circuit, has no arc extinguishing function, and can be switched on and off only under the condition of no load current. When the isolating switch is in the separated position, the contacts have insulation distance meeting the specified requirements and obvious disconnection marks; a switching device capable of carrying current in normal loop conditions and current in abnormal conditions (e.g., short circuit) for a specified period of time when in the closed position.
The isolating switch can be divided into an outdoor isolating switch and an indoor high-voltage isolating switch according to different installation modes; the insulating support can be divided into a single-column type isolating switch, a double-column type isolating switch, a three-column type isolating switch and the like according to different insulating support structures; the voltage class can be divided into a low-voltage isolating switch and a high-voltage isolating switch. Depending on the application, the application is not particularly limited.
Here, the load switch can cut off only a rated load current and a certain overcurrent, but cannot cut off a short-circuit current. Therefore, the first isolating switch 121 and the second isolating switch 122 are respectively arranged at the front end of the first load switch 111 and the front end of the second load switch 112 and used for forming obvious disconnection marks in the incoming line and the outgoing line so as to ensure that an obvious fracture is formed and isolated from a charged part in the process of hanging a load, line maintenance or equipment maintenance, a construction port is in an electroless state, and no current passes through the load, so that the safety of constructors and equipment is ensured.
Further, the load access device further includes: metal Oxide lightning arresters (MOAs). A first metal oxide arrester (MOA1), a second metal oxide arrester (MOA2), a third metal oxide arrester (MOA3), and/or a fourth metal oxide arrester (MOA 4);
the first metal oxide arrester (MOA1) connected between the first load switch 111 and a ground point (GND); the second metal oxide arrester (MOA2) connected between the second load switch 112 and the ground point; the third metal oxide arrester (MOA3) connected between the second disconnector 122 and a ground point; and the fourth metal oxide arrester (MOA4) connected between the first disconnector 121 and a ground point.
In particular, the metal oxide arrester is an important protective electrical appliance for protecting the insulation of power transmission and transformation equipment from overvoltage.
Further, the load access device further comprises: a first charged display device (DX1), a second charged display device (DX2), a third charged display device (DX3) and/or a fourth charged display device (DX 4); the first charged display device (DX1) connected between the first load switch 111 and a ground point; the second live display device (DX2) connected between the second load switch 112 and a ground point; the third live display device (DX3) connected between the second disconnecting switch 121 and a ground point; the fourth charged display device (DX4) is connected between the first isolator switch 122 and ground.
Specifically, the live display device is used for indicating whether the incoming line segment or the outgoing line segment where the live display device is located has current passing through.
This disclosed embodiment has guaranteed through first isolator 121, second isolator 122 and third electrified display device (DX3) and fourth electrified display device (DX4) the inlet wire 101 of load with the port that the outgoing line 102 of load is connected with the newly-increased load that will articulate is in the electroless state, with the electric power through line of electrified work with the inlet wire 101 of load with the port that the outgoing line 102 of load is connected with the newly-increased load is kept apart, has guaranteed the normal operating of through line during the construction to and the security in the work progress has been ensured to the uncharged of load port.
Fig. 3 is a block diagram of a load access apparatus provided by the present invention; as shown in fig. 3, the load access apparatus further includes: the incoming line 101 and the outgoing line 102 of the load are connected with different ends of the same power through line.
Further, the load access device further comprises: a cable junction box 100; the cable junction box 100 includes: a first port, a second port, a third port and a fourth port;
the first port 131 is an inlet port of the power through line;
the fourth port 132 is an outlet port of the power through line;
the second port 133 and the third port 134 are connected with the load;
an incoming line of the load is connected between the first port 131 and the second port 133;
an outgoing line of the load is connected between the third port 134 and the fourth port 132.
Specifically, in some embodiments, the first port 131 and the fourth port 132 are connected to different ports of the same through line, and the second port 133 and the third port 134 are connected to the power inlet port 201 and the power outlet port 202 of the load 200.
One end of the incoming line 101 is connected with the first port 131, and the other end of the incoming line 101 is connected with the second port 133; the second port 133 is connected to the power inlet port 201 of the load through a cable. One end of the outgoing line 102 is connected with the third port 134, and the other end of the outgoing line 102 is connected with the fourth port 132; the third port 134 is connected to the load outlet port 202 via a cable.
In some embodiments, the first port 131 and the second port 133 of the cable splice enclosure are cable entry indoor cold shrink terminations; the third port 134 and the fourth port 132 of the cable junction box are indoor cold-shrink terminals of cable outgoing cables.
In some embodiments, the cable junction box is pre-laid in the circuit through line, and different ports of the same power through line are connected through the first port 131 and the fourth port 132 of the cable junction box. When the mechanical lock is in the first switch state, the first load switch 111, the second load switch 112, the first isolation switch 121 and the second isolation switch 122 are all turned off; at this time, the second port 133 and the third port 134, which connect the incoming and outgoing ports of the load, do not pass current. A through-circuit line current flows from the first port 131 to the fourth port 132 of the cable junction box through the third load switch 113.
Here, the current maintains a path of the power through line through the cable connection box. The live-working power through line is isolated from the uncharged second port 133 and third port 134, and the safety of constructors in the process of passing through the power line with the load connected to the power through line is improved while the power through line normally runs.
Since the disconnector has no arc extinguishing device and has low breaking capability, the switching operation sequence must be followed when the disconnector is operated. When the mechanical lock is in the second switch state, the second isolating switch 122, the second load switch 112, the first isolating switch 121 and the first load switch 111 need to be closed in sequence; at this time, the third load switch 113 is turned off; the current passing through the circuit through line passes through the first load switch 111, flows from the first port 131 to the second port 133 of the cable butt box, flows into the hooked load from the connected load inlet port 201, and flows out from the load outlet port 202 through the third port 134 and from the fourth port 132, so that the path of the load passing through the circuit through line is realized.
Fig. 4 is a flowchart of a power line feedthrough method for load access according to the present invention; as shown in fig. 4, the power line penetration method for load access includes:
step S401: a cable butt-joint box is arranged on the power through line;
specifically, a cable butt-joint box position is reserved on the line merging section in the early implementation, and a cable butt-joint box is arranged at the reserved position of the power through line.
Step S402: respectively connecting the incoming line and the outgoing line of the load with different ports in the cable butt-joint box;
step S403: a first load switch is arranged on the incoming line;
step S404: a second load switch is arranged on the outgoing line;
step S405: a third load switch is arranged on a connecting wire, wherein the connecting wire is connected with the incoming wire and the outgoing wire; the third load switch and at least one of the first load switch and the second load switch form a mechanical lock;
specifically, when the load is not hung, the mechanical lock is controlled to be in a first switch state; wherein in the first switching state, the third load switch is closed and the first and second load switches are open;
and when the load is hung, controlling the mechanical lock to be in a second switch state, wherein in the second switch state, the third load switch is opened, and the first load switch and the second load switch are closed.
Specifically, the load may be a box-type substation load or a load of a traction substation kiosk, and is not specifically limited herein.
In some embodiments, the third load switch forms a mechanical latch with the first load switch; in other embodiments, the third load switch may also form a mechanical lock with the first load switch;
the utility model discloses in through setting up third load switch, with first load switch with the mechanical shutting that at least one of second load switch formed, all can realize deciding that electric power link up the line and pass through the direct play of third load switch or process the effect of flowing out behind the load realizes the switching of electric power link up the line circuit flow direction.
In the present invention, the mechanical latch is used to realize the reverse latch requirement, in this embodiment, the mechanical latch is composed of the third load switch and the first load switch, when the mechanical latch is closed, the first load switch is automatically disconnected under the action of the linked mechanical mechanism, and at this time, the mechanical latch is in the first switch state; on the contrary, when the third load switch is switched off, the first load switch is automatically closed under the action of the linked mechanical mechanism, and at the moment, the mechanical lock is in a second switch state.
Further, the method further comprises: a first isolating switch is arranged on the incoming line; and a second isolating switch is arranged on the outgoing line. Since the disconnector has no arc extinguishing device and has low breaking capability, when the disconnector is operated, it is necessary to follow a switching operation sequence to close the second disconnector, the second load switch, the first disconnector, and the first load switch in the second switching state in order.
Specifically, the load switch can only cut off rated load current and a certain overload current, but cannot cut off short-circuit current. Therefore, the first isolating switch 121 and the second isolating switch 122 are respectively arranged at the front end of the first load switch 111 and the front end of the second load switch 112 and used for forming obvious disconnection marks in the incoming line and the outgoing line so as to ensure that an obvious fracture is formed and isolated from a charged part in the process of hanging a load, line maintenance or equipment maintenance, a construction port is in an electroless state, and no current passes through the load, so that the safety of constructors and equipment is ensured.
Further, the method further comprises at least one of: a first metal oxide arrester is arranged between the first load switch and the grounding point; a second metal oxide arrester is arranged between the second load switch and the grounding point; a third metal oxide arrester is arranged between the second isolating switch and the grounding point; and a fourth metal oxide arrester is arranged between the first isolating switch and the grounding point.
In particular, the metal oxide arrester is an important protective electrical appliance for protecting the insulation of power transmission and transformation equipment from overvoltage.
Further, the method further comprises at least one of: a first charged display device is arranged between the first load switch and the grounding point; a second charged display device is arranged between the second load switch and the grounding point; a third live display device is arranged between the first isolating switch and the grounding point; and a fourth charged display device is arranged between the second isolating switch and the grounding point.
Specifically, the live display device is used for indicating whether the incoming line segment or the outgoing line segment where the live display device is located has current passing through.
This disclosed embodiment has guaranteed through first isolator, second isolator and electrified display device of third and fourth electrified display device the inlet wire of load with the port that the outgoing line of load is connected with the newly-increased load that will articulate is in the electroless state, with the electric power of electrified work link up the line with the inlet wire of load with the port that the outgoing line of load is connected with the newly-increased load is kept apart, has guaranteed the normal operating of link up the line when the construction to and the security in the work progress has been ensured to the uncharged of load port.
Further, step 402 further comprises: and connecting the incoming line and the outgoing line of the load with different ports of the same power through line.
Further, the method further comprises: installing a cable butt-joint box;
wherein, the cable butt joint case includes: a first port, a second port, a third port and a fourth port; the first port is an inlet port of the power through line; the fourth port is an outgoing port of the power through line; the second port and the third port are connected with the load; an incoming line of the load is connected between the first port and the second port; and an outgoing line of the load is connected between the third port and the fourth port.
Specifically, in some embodiments, the first port and the fourth port are connected to different ports of the same pass-through wire, and the second port and the third port are connected to an electrical inlet port and an electrical outlet port of a load.
One end of the incoming line is connected with the first port, and the other end of the incoming line is connected with the second port; the second port is connected with the power inlet port of the load through a cable. One end of the outgoing line is connected with the third port, and the other end of the outgoing line is connected with the fourth port; and the third port is connected with the load power outlet port through a cable.
Through the mechanical locking formed by the third load switch in the load access equipment and at least one of the first load switch and the second load switch, the flow direction of the through line circuit is switched, so that the circuit through line still keeps a path in the hanging process, the circuit through line does not need to be disconnected for construction, and the labor cost and the time cost of skylight point construction are reduced to the greatest extent. After the load hitching is completed, the load path can be completed by adjusting the mechanical locking state, the reverse connection process is simple, and the operation is convenient. When the later stage is maintained and is changed the load, also can utilize the utility model discloses overhaul and change the load that articulates under the circumstances of not cutting off the power supply of link-up line, the operation is convenient, reduces the manual work and the time cost of maintenance. The utility model discloses a predetermine a load access equipment on electric power through line, can carry out the access that electric power through line newly-increased load, reduce butt joint case quantity to make electric power through line fault point reduce, improved the power supply reliability.
The following describes a power line feedthrough method for load access according to the present invention with a specific example:
step 1: when the power through line is laid, a cable butt-joint box is reserved for a later implementation line.
Step 2: arranging a cable butt-joint box at a reserved position of the power through line;
and step 3: and the first port of the cable butt-joint box is connected with the wire inlet port of the power through wire, and the fourth port of the cable butt-joint box is connected with the wire outlet port of the power through wire.
And 4, step 4: ensuring that the third load switch is closed and the first load switch and the second load switch are opened; meanwhile, the first isolating switch and the second isolating switch are disconnected, and the live display devices DX1 and DX2 are confirmed to be in a non-power state.
And 5: and a cable is additionally arranged and is connected with the second port end of the cable butt-joint box and the power inlet port of the box transformer substation. And a cable is additionally arranged and is connected with a third port of the cable butt-joint box and an electricity outlet port of the box transformer substation.
Step 6: and sequentially closing the second isolating switch, closing the second load switch, closing the first isolating switch, closing the first load switch, and disconnecting the third load switch to finish the load hanging connection of the box transformer substation.
Fig. 5 is another flowchart of a power line feedthrough method for load access provided by the present invention;
step 501: when the power through line is laid, a cable butt-joint box is reserved for a later implementation line.
Step 502: and a cable butt-joint box is arranged at the reserved position of the power through line.
Step 503: and the first port of the cable butt-joint box is connected with the wire inlet port of the power through wire, and the fourth port of the cable butt-joint box is connected with the wire outlet port of the power through wire.
Step 504: ensuring that the third load switch is closed and the first load switch and the second load switch are opened; meanwhile, the first isolating switch and the second isolating switch are disconnected, and the live display devices DX1 and DX2 are confirmed to be in a non-power state.
Step 505: additionally arranging a cable for connecting a second port end of the cable butt-joint box and a power inlet port for drawing loads of a substation; and a cable is additionally arranged and is connected with a third port of the cable butt-joint box and a power outlet port for drawing loads of the substation.
Step 506: and sequentially closing the second isolating switch, the second load switch, the first isolating switch, the first load switch and the third load switch to finish the hanging connection of the load of the traction substation pavilion.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A load access device, comprising:
a first load switch connected to an incoming line of a load;
the second load switch is connected to the outgoing line of the load;
the third load switch is positioned on a connecting line, wherein the connecting line is connected with an incoming line of the load and an outgoing line of the load;
the third load switch forms a mechanical latch with at least one of the first load switch and the second load switch.
2. The load access device of claim 1, wherein when the mechanical latch is in a first switch state, the third load switch is closed, and the first load switch and the second load switch are open;
when the mechanical latch is in a second switch state, the third load switch is open and the first load switch and the second load switch are closed.
3. The load access device of claim 1, further comprising: a first isolation switch and a second isolation switch;
the first isolating switch is connected to the incoming line of the load and is positioned at the front end of the first load switch;
the second isolating switch is connected to the outgoing line of the load and is positioned at the front end of the second load switch.
4. The load access device of claim 3, further comprising: a first metal oxide arrester, a second metal oxide arrester, a third metal oxide arrester and/or a fourth metal oxide arrester;
the first metal oxide arrester is connected between the first load switch and the grounding point;
the second metal oxide arrester is connected between the second load switch and the grounding point;
the third metal oxide arrester is connected between the second isolating switch and the grounding point;
and the fourth metal oxide arrester is connected between the first isolating switch and the grounding point.
5. The load access device of claim 3, further comprising: a first charged display device, a second charged display device, a third charged display device and a fourth charged display device;
the first charged display device is connected between the first load switch and a grounding point;
the second charged display device is connected between the second load switch and the grounding point;
the third electrified display device is connected between the second isolating switch and the grounding point;
and the fourth charged display device is connected between the first isolating switch and the grounding point.
6. The load access device of claim 1, further comprising:
and the incoming line and the outgoing line of the load are connected with different ends of the same power through line.
7. The load access device of claim 6, further comprising: a cable splice box; the cable junction box includes: a first port, a second port, a third port and a fourth port;
the first port is an inlet port of the power through line;
the fourth port is an outgoing port of the power through line;
the second port and the third port are connected with the load;
an incoming line of the load is connected between the first port and the second port;
and an outgoing line of the load is connected between the third port and the fourth port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022246970.3U CN213959754U (en) | 2020-10-10 | 2020-10-10 | Load access equipment |
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| CN202022246970.3U CN213959754U (en) | 2020-10-10 | 2020-10-10 | Load access equipment |
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