CN110611264A - A low-voltage distribution box non-stop operation system - Google Patents

Abstract

The invention provides a low-voltage distribution box non-stop operation system, including a bypass distribution box, a low-voltage distribution box and insulation tools, characterized in that the bypass distribution box includes a circuit breaker, incoming connection cables and outgoing lines Connecting cables; the incoming busbar of the low-voltage distribution box is a segmented busbar combination structure, the first section of busbar is connected to the incoming circuit breaker, the second section of busbar is connected to the incoming cable, and this section of busbar Connection holes are reserved on the top; the outgoing busbar of the low-voltage distribution box is also a segmented busbar combination structure, the first section of busbar is connected with the outgoing circuit breaker, and the second section of busbar is connected with the outgoing cable. Connecting holes are also reserved on the busbar; when the low-voltage distribution box needs to be repaired, use insulated tools to connect the incoming connection cable and outgoing connection cable of the bypass distribution box to the incoming busbar of the low-voltage distribution box 1. On the reserved connection hole of the outlet busbar, it supplies power to the load of the low-voltage distribution box; it truly realizes the non-stop operation during the maintenance of the low-voltage distribution box.

Description

A low-voltage distribution box non-stop operation system

technical field

The invention relates to the field of electric power maintenance live work, in particular to a low-voltage power distribution box non-stop operation system.

Background technique

With the development of our country's economy and the improvement of people's living standards, the importance of electricity is getting higher and higher, and there are higher requirements for the continuity of power supply. As an important part of the power supply system, the low-voltage distribution box is actively and regularly maintained. It is a very important task, especially the circuit breaker in the low-voltage distribution box, to ensure the normal power supply of the low-voltage distribution box, overload, short circuit, etc. Disconnecting the line under certain circumstances plays a decisive role, precisely because it has such a protective function, disconnecting the line under the condition of short circuit and high current, it is easy to generate an arc and burn out the circuit breaker in the low-voltage distribution box.

When repairing or replacing a circuit breaker, the current common method is to issue a power outage notice, and then repair the power outage on the line at the scheduled date and time. Although the power outage is planned and users are prepared to respond in advance, even so, it will still cause losses to many users, and even when the power supply is restored, electric shock accidents may occur to lower-level users.

Contents of the invention

In order to solve the above problems, the present invention discloses a low-voltage distribution box non-stop operation system, which includes a bypass distribution box, a low-voltage distribution box and insulation tools, and is characterized in that the bypass distribution box includes circuit breakers, Line connection cables and outgoing connection cables; the incoming busbar of the low-voltage distribution box is a segmented busbar combination structure, the first section of busbar is connected to the incoming circuit breaker, and the second section of busbar is connected to the incoming cable , connection holes are reserved on this section of busbar; the outgoing busbar of the low-voltage distribution box is also a segmented busbar combination structure, the first section of busbar is connected to the outgoing line circuit breaker, the second section of busbar is connected to the outgoing line For cable connection, connection holes are also reserved on this section of the busbar;

Use insulated tools to connect the incoming connection cable of the bypass distribution box with the incoming connection hole of the bypass distribution box of the low-voltage distribution box, and connect the outgoing connection cable of the bypass distribution box with the bypass distribution box of the low-voltage distribution box After the outlet connection holes are connected, close the circuit breaker of the bypass distribution box.

When connecting the outgoing cables of the bypass distribution box, there are generally two or three outgoing circuit breakers in the low-voltage distribution box. The connecting holes of the outlet wires of the electric box are connected in parallel with parallel cables according to the corresponding phase sequence, so as to supply power to the loads of each road.

Use insulating tools to remove the first section of the incoming busbar and the first section of the outgoing busbar of the low-voltage distribution box. At this time, the low-voltage distribution box is completely out of power from the incoming line circuit breaker to the outgoing line circuit breaker, so you can rest assured. Maintenance work; at this time, the power supply to the original load is supplied through the bypass distribution box, and the power consumption of the load will not be affected during the maintenance process.

In the process of wiring and removing the corresponding busbar, there is no need to loosen the connecting bolts of the incoming cable, load outgoing cable and busbar.

After removing the first section of the incoming busbar, since the second section of the incoming busbar is fixed by two insulators, because there are two fixed points, this busbar will not rotate and will not interact with other phase-sequence busbars. In the same principle, after the first section of the outgoing busbar is removed, there will be no contact with other phase-sequential busbars.

The position of the connecting hole for the incoming line of the bypass distribution box is set at the rear end of the metering transformer relative to the direction of current flow, and the connecting cable for the incoming line of the bypass distribution box is connected to the connecting hole for the incoming line of the bypass distribution box Finally, the current first passes through the current transformer, and then flows to the bypass distribution box, so that the power consumption of the load can also be measured during the maintenance of the low-voltage distribution box.

The invention has the advantages that: due to the power supply function of the bypass distribution box, the non-stop operation of the voltage distribution box is truly realized.

Description of drawings

Fig. 1: schematic diagram of the present invention;

Figure 2: Schematic diagram of the incoming busbar of the present invention;

Figure 3: Schematic diagram of the outgoing busbar of the present invention;

Figure 4: Schematic diagram of the installation of the incoming busbar of the present invention;

Figure 5: Schematic diagram of the installation of the outlet busbar of the present invention;

Figure 6: Schematic diagram of the bypass distribution box of the present invention.

List of reference signs

1. Incoming line circuit breaker, 2. Bolt, 3. Metering transformer, 4. Insulator, 5. Incoming line cable, 6. Outgoing line circuit breaker, 7. Load outgoing line cable, 8. Incoming line connecting cable of bypass distribution box , 9. Bypass distribution box outlet connection cable, 10. Bypass distribution box circuit breaker, 11. The first section of the incoming busbar, 12. The second section of the incoming busbar, 13. The bypass distribution box into Line connection hole, 14. Incoming busbar insulator fixing hole, 21. Outgoing busbar first section, 22. Outgoing busbar second section, 23. Bypass distribution box outlet connection hole, 24. Outgoing busbar insulator fixing Holes, 91. Connect cables in parallel.

Detailed ways

The invention provides a low-voltage distribution box non-stop operation system, the incoming busbar of the low-voltage distribution box is a segmented busbar combination structure, the first section of busbar is connected to the incoming circuit breaker, and the second section The busbar is connected to the incoming cable, and a connection hole is reserved on this section of the busbar; the outgoing busbar of the low-voltage distribution box is also a segmented busbar combination structure, and the first section of the busbar is connected to the outgoing circuit breaker. The second section of busbar is connected with outgoing cables, and connection holes are reserved on this section of busbar.

Specifically, referring to Fig. 2 and Fig. 4, the incoming busbar of the low-voltage distribution box is composed of the first section 11 of the incoming busbar and the second section 12 of the incoming busbar, the first section 11 of the incoming busbar and the The circuit breaker 1 is connected, the second section 12 of the incoming busbar is connected with the incoming cable 5, the first section 11 of the incoming busbar and the second section 12 of the incoming busbar are connected by bolts 2, and the metering transformer 3 is installed on On the second section 12 of the incoming busbar, a connection hole 13 for the incoming line of the bypass distribution box is reserved on the second section 12 of the incoming busbar.

Further, referring to Fig. 3 and Fig. 5, the outgoing busbar of the low-voltage distribution box is composed of the first section 21 of the outgoing busbar and the second section 22 of the outgoing busbar, and the first section 21 of the outgoing busbar is connected with the outgoing circuit breaker 6, The second section 22 of the outgoing busbar is connected with the load outgoing cable 7, the first section 21 of the outgoing busbar and the second section 22 of the outgoing busbar are connected by bolts 2, and the second section 22 of the outgoing busbar is reserved for bypass power distribution Box outlet connecting hole 23.

Further, referring to FIG. 6 , the bypass distribution box includes a circuit breaker 10 of the bypass distribution box, an incoming connection cable 8 of the bypass distribution box, and an outgoing connection cable 9 of the bypass distribution box.

Further, use an insulating tool to connect the incoming connection cable 8 of the bypass distribution box with the incoming connection hole 13 of the bypass distribution box of the low-voltage distribution box, and connect the outgoing connection cable 9 of the bypass distribution box to the connection hole 13 of the low-voltage distribution box. After the outlet connection holes 23 of the bypass distribution box are connected, the bypass distribution box circuit breaker 10 of the bypass distribution box is closed.

As shown in Figure 5, when connecting the outgoing cable 9 of the bypass distribution box, there are generally two to three outgoing circuit breakers 6 of the low-voltage distribution box. The outlet connection hole 23 of the bypass distribution box on the second section 22 is connected in parallel with the parallel cable 91 according to the corresponding phase sequence, so as to supply power to each load.

Further, use insulating tools to remove the first section of the incoming busbar and the first section of the outgoing busbar of the low-voltage distribution box. At this time, the low-voltage distribution box is completely out of power from the incoming line circuit breaker to the outgoing line circuit breaker. Rest assured to carry out maintenance work; at this time, the power supply to the original load through the bypass distribution box will not affect the load during the maintenance process.

As shown in the figure, in the process of connecting cables and removing the first section of incoming and outgoing busbars, there is no need to loosen the connecting bolts of incoming cables, load outgoing cables and busbars.

Further, in the process of maintenance, insulation tools are not only tools for live connection of cables, removal and installation of busbars and circuit breakers; they also include insulating gloves, insulating shoes, insulating clothing, insulating caps and other insulating Protective equipment; at the same time, it also includes the insulation cloth used to protect the second section of the outgoing busbar and the second section of the incoming busbar, to protect and isolate the live parts and operating positions in space, so that the protection makes the non-power-off operation safer .

As shown in Figure 4 and Figure 5, after removing the first section of the incoming busbar, the second section of the incoming busbar is fixed by two insulators, and because there are two supporting points, the busbar will not rotate. There will be no contact with other phase-sequence busbars. In the same principle, after the first section of the outgoing busbar is removed, there will be no contact with other phase-sequence busbars.

As shown in Figure 4, the position of the connecting hole 13 for the incoming line of the bypass distribution box is set at the rear end of the metering transformer 3 relative to the direction of current flow, and the connecting cable 8 and the bypass box are connected to the incoming line of the bypass distribution box After the connection holes 13 of the distribution box are connected, the current first passes through the current transformer 3 and then flows to the bypass distribution box, so that the power consumption of the load can also be measured during maintenance of the low-voltage distribution box.

As shown in Fig. 6, a circuit breaker 10 of the bypass distribution box is arranged in the bypass distribution box. During maintenance, if the load line fails, the circuit breaker can play a protective role.

Further, the power supply to the low-voltage distribution box is restored by reversely operating the foregoing implementation manner.

The technical means disclosed in the present invention are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims (5)

1. A low-voltage distribution box uninterrupted power operation system comprises a bypass distribution box, a low-voltage distribution box and an insulation tool, and is characterized in that the bypass distribution box comprises a circuit breaker, an incoming line connecting cable and an outgoing line connecting cable; the incoming busbar of the low-voltage distribution box is of a sectional busbar combined structure, a first section of busbar is connected with an incoming breaker, a second section of busbar is connected with an incoming cable, and a connecting hole is reserved in the section of busbar; the outgoing bus bar of the low-voltage distribution box is also of a sectional bus bar combined structure, a first section of bus bar is connected with an outgoing line breaker, a second section of bus bar is connected with an outgoing line cable, and a connecting hole is reserved on the section of bus bar; when the low-voltage distribution box needs maintenance operation, the incoming line connecting cable and the outgoing line connecting cable of the bypass distribution box are respectively connected to reserved connecting holes of an incoming line busbar and an outgoing line busbar of the low-voltage distribution box through an insulating tool, and the load of the low-voltage distribution box is supplied with power.

2. The uninterrupted power operation system of the low-voltage distribution box according to claim 1, wherein the position of the connection hole reserved on the incoming busbar is arranged at the rear end of the metering transformer relative to the current flowing direction.

3. The uninterrupted power operation system of the low-voltage distribution box according to claim 1, wherein the second section of the incoming busbar of the low-voltage distribution box and the second section of the outgoing busbar of the low-voltage distribution box are fixed by using a double-hole insulator or two insulators.

4. The uninterrupted power operation system of the low-voltage distribution box according to claim 1, wherein the first section and the second section of the incoming busbar of the low-voltage distribution box are connected by bolts, and the first section and the second section of the outgoing busbar of the low-voltage distribution box are also connected by bolts.

5. The uninterrupted power operation system of the low-voltage distribution box according to claim 1, wherein the connecting holes reserved on the incoming busbar and the outgoing busbar are non-circular through holes.