Non-power-cut meter changing operation system and method

Abstract

The system comprises an electric energy meter, a 2P air circuit breaker in front of the electric energy meter, a power taking device in front of the electric energy meter, a 2P air circuit breaker behind the electric energy meter, a power taking device behind the 2P air circuit breaker and a power taking tool box of the electric energy meter. The electric energy meter is respectively connected with the meter front 2P air circuit breaker and the meter rear 2P air circuit breaker and is used for metering electric energy of residential users; the meter front electricity taking device is connected with the non-power-cut meter changing operation tool box and is used for establishing electric meter short circuit bypass L1 and N1 branches; and the meter rear 2P air circuit breaker power taking device is respectively connected with the meter rear 2P air circuit breaker and the non-power-cut operation tool box, and is used for establishing electric meter short circuit bypass L2 and N2 branches. The device is low in production cost, can be repeatedly used, can obtain voltage and current under the condition that the insulation of an original power supply line is not damaged, builds an electric energy meter short-circuit bypass, and achieves short-time electric energy meter replacement without power outage.

Description

Technical Field

[0001] The invention belongs to the technical field of low-voltage energy meters, and relates to an operating system and method for replacing meters without power interruption, in particular to an operating system and method for replacing single-phase low-voltage energy meters without power interruption. Background Art

[0002] An energy meter, also known as an electricity meter, is a device used to measure electrical energy. The replacement work of traditional single-phase low-voltage energy meters requires the cooperation of users to cut off power. Although the meter replacement time is very short, it also causes periodic power outages for users, affecting the normal life of residents and making it difficult to meet the electricity demand of electricity-sensitive customers. How to meet the needs of electricity-sensitive users, improve the uninterrupted power supply duration and the quality of power supply and use service levels, and significantly reduce the number of service work orders for electricity metering services is an urgent problem for every power supply enterprise.

[0003] Currently, there are also many devices for replacing meters without power interruption on the market, which can be roughly divided into two categories. The first category is the electricity meter connector short-circuit bypass device. For this type of product, the electricity meter connector needs to be installed first when installing the electricity meter, and then the electricity meter is installed on the connector. When the meter needs to be replaced, a mechanical device on the connector is rotated to establish a short-circuit bypass for the electricity meter, causing the meter to lose power, and finally realizing meter replacement without power interruption. However, this type of product has the following defects: 1. Each electricity meter connector can only serve one electricity meter. Today, with a huge number of electricity meters, large-scale installation adds huge cost expenditures to enterprises; 2. This product can only be used for newly installed electricity meters. For existing meters, if an electricity meter connector wants to be installed, power must be cut off for installation, which does not achieve the expected effect of uninterrupted power supply for users; 3. This product sometimes has a millisecond-level short power outage during the process of rotating the mechanical device of the connector to short-circuit the electricity meter; 4. This product cannot measure the electricity consumption of users during meter replacement, resulting in power loss for the power supply enterprise.

[0004] The second category of products uses a piercing device to penetrate the power supply line and the user line to obtain voltage and current, connects the obtained voltage and current to relevant equipment, short-circuits the meter through this equipment and measures the electricity consumption, and finally realizes meter replacement without power interruption. This type of product also has the following defects: 1. The piercing device damages the insulation level of the original power supply line, easily causing risks of electric shock and fire; 2. The piercing device is a one-time product and is expensive.

[0005] After retrieval, no publicly disclosed literature of prior art identical or similar to the present invention was found. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and propose a power-off-free meter replacement operation system and method. The system has a low production cost, can be reused multiple times, can obtain voltage and current without damaging the insulation of the original power supply line, establish a short-circuit bypass for the electricity meter, realize short-time power-off-free electricity meter replacement, can measure the electricity consumption of users during power-off-free meter replacement, and can overcome the shortcomings of various types of power-off-free meter replacement devices on the current market.

[0007] The present invention solves its practical problems by adopting the following technical solutions:

[0008] A power-off-free meter replacement operation system includes: an electricity meter, a 2P front-meter air circuit breaker, a front-meter power-taking device, a 2P rear-meter air circuit breaker, a rear-meter 2P air circuit breaker power-taking device, and a power-off-free meter replacement operation toolbox;

[0009] The electricity meter is respectively connected to the 2P front-meter air circuit breaker and the 2P rear-meter air circuit breaker for electricity metering of residential users; the front-meter power-taking device is connected to the power-off-free meter replacement operation toolbox for establishing the short-circuit bypass branches L1 and N1 of the electricity meter; the rear-meter 2P air circuit breaker power-taking device is respectively connected to the 2P rear-meter air circuit breaker and the power-off-free operation toolbox for establishing the short-circuit bypass branches L2 and N2 of the electricity meter;

[0010] Moreover, the electricity meter is a single-phase low-voltage electricity meter.

[0011] Moreover, the inlet of the 2P front-meter air circuit breaker is connected to the neutral busbar and the live busbar of the front-meter power supply line, and the outlet of the 2P front-meter air circuit breaker is connected to the electricity meter for energizing and de-energizing the electricity meter when replacing the electricity meter.

[0012] Moreover, the front-meter power-taking device includes: two alligator clips with insulating shells, and the two alligator clips with insulating shells are respectively connected to two first general quick plugs with insulating shells through two first copper wires covered with insulating skins; the jaws of the alligator clip with insulating shell are made of copper metal and are connected to the first copper wire covered with insulating skin, and the alligator clip with insulating shell controls the opening and closing of the jaws by pressing.

[0013] Moreover, the rear-meter 2P air circuit breaker power-taking device includes a plastic kit and 2 copper pins with built-in springs. The plastic kit can be sleeved from the front of the 2P rear-meter air circuit breaker and fits tightly; the back of the plastic kit is symmetrically provided with a snap device, and after the plastic kit is sleeved on the 2P rear-meter air circuit breaker, it catches the rear shell of the 2P rear-meter air circuit breaker;

[0014] There are 2 copper pins with built-in springs arranged below the plastic kit. When pressed, the copper pins can move back and forth following the springs. The inner sides of the 2 copper pins with built-in springs are located at the positions of the 2 outlet screws of the 2P main switch behind the meter of the 2P main switch behind the meter. The outer sides of the 2 copper pins with built-in springs are respectively connected to 2 copper wires with a second layer of insulating skin. The other ends of the 2 copper wires with a second layer of insulating skin are respectively a second universal quick plug with an insulating shell and a third universal quick plug with an insulating shell. The copper pins with built-in springs naturally extend in the natural state. When the plastic kit of the power-taking device of the 2P main switch behind the meter is sleeved onto the 2P main switch behind the meter, the springs are compressed. At this time, under the action of the springs, the copper pins are in close contact with the outlet screws of the 2P main switch behind the meter, realizing power-taking.

[0015] Moreover, clamp the two alligator clips with insulating shells of the power-taking device in front of the meter respectively on the neutral busbar and the live busbar of the power supply line in front of the meter, and connect the two first universal quick plugs with insulating shells to the first power grid power input port and the second power grid power input port of the live meter-changing operation toolbox; connect the power-taking device behind the meter to the 2P main switch behind the meter, and connect the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell of the power-taking device behind the meter to the first user end output port and the second user end output port of the live meter-changing operation toolbox respectively, and incorporate the live meter-changing operation toolbox into the meter loop to establish a meter short-circuit bypass.

[0016] Moreover, the live meter-changing operation toolbox includes: a first power grid power input port and a second power grid power input port, a first user end output port and a second user end output port, and a first digital voltmeter for measuring the voltage value between the first power grid power input port and the first user end output port; a second digital voltmeter for measuring the voltage value between the second power grid power input port and the second user end output port; the power-off meter-changing operation toolbox further includes: a 2P main switch and a digital rail meter; the 2P main switch is used to control the on-off of the meter short-circuit bypass; the digital rail meter is used for electric energy metering.

[0017] A method for replacing a low-voltage direct-connected energy meter without power interruption by using a live meter-changing operation system includes the following steps:

[0018] Take two power-taking devices in front of the meter, and clamp the two alligator clips with insulating shells respectively on the neutral busbar and the live busbar of the power supply line in front of the meter;

[0019] Align the protruding parts of the two first universal quick plugs with insulating shells respectively with the notches of the first power grid power input port and the second power grid power input port of the live meter-changing operation toolbox, then insert them vertically and rotate them to the right. At this time, under the connection of the two copper wires with a first layer of insulating skin, the L1 and N1 lines are conducted;

[0020] Align the plastic kit of the 2P power-taking device behind the meter with the front of the 2P air circuit breaker behind the meter and press it inward. When you hear a click, the snap device catches the rear case of the 2P air circuit breaker behind the meter. At this time, the spring of the copper pin with an in-built spring is compressed, and under the action of the spring, the copper pin makes close contact with the outgoing wire screw of the 2P air circuit breaker behind the meter, and the incoming wire screw of the 2P air circuit breaker behind the meter remains unchanged;

[0021] Align the protruding parts of the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell of the 2P power-taking device behind the meter with the notch positions of the first user terminal output port and the second user terminal output port of the live meter replacement operation toolbox respectively, then insert them vertically and rotate them to the right. At this time, under the connection of the second copper wire covered with insulating skin, the L2 and N2 lines are conducting;

[0022] Observe the voltage values of the first digital voltmeter and the second digital voltmeter in the live meter replacement operation toolbox; if the values are not zero, it means that the zero and live wires of the input and output terminals of the live meter replacement operation toolbox do not correspond. At this time, connect the second universal quick plug with an insulating shell to the second user terminal output port and connect the third universal quick plug with an insulating shell to the first user terminal output port to solve the problem;

[0023] If the values are both 0, it means that the zero and live wires of the input and output terminals of the live meter replacement operation toolbox are consistent, and the short-circuit bypass of the watt-hour meter is established;

[0024] Press the indication reset button of the digital rail meter of the digital rail meter to clear the indication of the digital rail meter;

[0025] Close the switch of the 2P air circuit breaker in the live meter replacement operation toolbox, and the short-circuit bypass of the watt-hour meter is conducting;

[0026] First, disconnect the switch of the 2P air circuit breaker behind the meter, and then disconnect the switch of the 2P air circuit breaker in front of the meter. At this time, both the L3, N3 and L4, N4 circuits are disconnected, the watt-hour meter loses power, and the power supply enterprise continues to supply power to the user through the L1, N1 and L2, N2 circuits;

[0027] Start replacing the user's watt-hour meter, and the digital rail meter starts to measure the user's electricity during the meter replacement;

[0028] After the watt-hour meter is replaced, first close the switch of the 2P air circuit breaker in front of the meter, and then close the switch of the 2P air circuit breaker behind the meter. At this time, the L3, N3 and L4, N4 circuits are conducting;

[0029] Disconnect the switch of the 2P air circuit breaker in the live meter replacement operation toolbox, the short-circuit bypass of the watt-hour meter is disconnected, and the value displayed on the screen of the digital rail meter is the electricity generated by the user during the live meter replacement;

[0030] Press the buckle device of the plastic kit with both hands and bend it outwards to withdraw the plastic kit from the 2P air circuit breaker behind the meter. Rotate the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell to the left and pull them out from the first user terminal output port and the second user terminal output port;

[0031] Press the alligator clips of the power-taking device with an insulating shell in front of the meter, separate the two alligator clip jaws from the neutral busbar and the live busbar of the power supply line in front of the meter respectively, rotate the two first universal quick plugs with insulating shells to the left and pull them out from the first power grid power input port and the second power grid power input port respectively. So far, the work of replacing the meter without power interruption is completed.

[0032] Advantages and beneficial effects of the present invention:

[0033] The present invention innovatively develops a plastic kit that can closely fit the 2P air circuit breaker behind the meter and can obtain power from the lower screw of the 2P air circuit breaker behind the meter. It can obtain voltage and current without damaging the original power supply line, has a high safety factor and can be reused multiple times, overcoming the defects that the current puncture-type equipment damages the line and has safety risks and the connector-type equipment has high costs.

[0034] The present invention proposes an operating system for replacing the meter without power interruption, including an operating toolbox for replacing the meter without power interruption: the operating box for replacing the meter without power interruption has 4 interfaces, and innovatively develops a plastic kit that can obtain power from the 2P air circuit breaker behind the meter. This device does not need to damage the original power supply line and can obtain power from the outgoing line screw of the 2P air circuit breaker behind the meter. The two power grid power input ports of the present invention are connected to the neutral busbar and the live busbar of the power supply line in front of the meter through copper wires covered with insulating skin, and the two user terminal output ports are connected to the outgoing line screws of the 2P air circuit breaker behind the meter through the power-taking device of the 2P air circuit breaker behind the meter, thereby establishing a short-circuit bypass for the electric energy meter. Finally, the on-off of the short-circuit bypass of the electric energy meter is controlled by the 2P air circuit breaker in the operating toolbox for replacing the meter without power interruption, and the digital rail meter in the operating toolbox for replacing the meter without power interruption is used to measure the electricity consumption of users during the meter replacement without power interruption. The present invention does not need to damage the insulating skin of the original power supply line, does not affect the insulation level of the power supply line, and can measure the electricity consumption of users during the meter replacement without power interruption. It has high reliability, wide application range and can be reused multiple times, overcoming the defects of various products for replacing the meter without power interruption on the current market. The meter replacement efficiency is significantly improved compared with other products on the market, and the replacement of the electric energy meter without power interruption for a short time is perfectly realized.

[0035] 2. Compared with the current device for replacing the meter without power interruption by using the short-circuit bypass device of the electric energy meter connector, the present invention is applicable to both existing meters and newly installed meters, and can be reused multiple times. It has low production costs, there will be no power outage of any form for users during the meter replacement, and it can accurately measure the electricity generated by users during the meter replacement without power interruption;

[0036] 3. Compared with the device that uses a puncture device to obtain the voltage and current of the power supply line and the user line and establishes a short-circuit bypass of the electricity meter to achieve meter replacement without power interruption, the present invention does not need to damage any power supply line, does not affect the insulation level and safety of the original line, and at the same time has a low cost and can be reused multiple times;

[0037] 4. According to calculations, it takes 5 - 8 minutes for the staff to replace one electricity meter. Other power-off-free meter replacement devices on the market generally take 20 - 30 minutes. After using the power-off-free meter replacement device, the time can be controlled within 12 minutes. The replacement efficiency is much higher than other similar products on the market, greatly saving time costs and truly achieving "0" burden for meter replacement.

[0038] 5. The present invention effectively overcomes all the defects of various power-off-free meter replacement products on the current market. It has high reliability and low single-meter replacement cost, and perfectly realizes short-time power-off-free electricity meter replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the power-taking device in front of the meter provided by the present invention;

[0040] Figure 2 Schematic diagram of the power-taking device of the 2P air circuit breaker behind the meter provided by the present invention;

[0041] Figure 3 Schematic diagram of the 2P air circuit breaker behind the meter provided by the present invention;

[0042] Figure 4 Schematic diagram of the power-off-free meter replacement operation toolbox provided by the present invention;

[0043] Figure 5 Schematic diagram of the electrical principle of the power-off-free meter replacement operation system provided by the present invention;

[0044] Figure 6 Internal wiring diagram of the power-off-free meter replacement operation toolbox provided by the present invention.

[0045] Description of the reference numerals in the drawings:

[0046] 1. Alligator clips with insulating shells; 2. First copper wire covered with insulating skin; 3. First universal quick plug with insulating shell; 4. Plastic kit; 5. Snap device; 6. Copper pin with built-in spring; 7. Second copper wire covered with insulating skin; 8. Second universal quick plug with insulating shell; 9. Third universal quick plug with insulating shell; 10. Inlet screw of 2P air circuit breaker behind the meter; 11. Outlet screw of 2P air circuit breaker behind the meter; 12. 2P air circuit breaker behind the meter; 13. Rear shell of 2P air circuit breaker behind the meter; 14. First grid power input port; 15. Second grid power input port; 16. First user end output port; 17. Second user end output port; 18. First digital voltmeter; 19. Second digital voltmeter; 20. 2P air circuit breaker; 21. Digital rail meter; 22. Value reset button of digital rail meter; 23. 2P air circuit breaker in front of the meter Detailed implementation mode

[0047] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings:

[0048] A power-off-free meter replacement operation system includes: an electric energy meter, a 2P air circuit breaker in front of the meter, a power-taking device in front of the meter, a 2P air circuit breaker behind the meter, a power-taking device for the 2P air circuit breaker behind the meter, and a power-off-free meter replacement operation toolbox;

[0049] The electric energy meter is respectively connected to the 2P air circuit breaker in front of the meter and the 2P air circuit breaker behind the meter, and is used for electric energy metering of residential users; the power-taking device in front of the meter is connected to the power-off-free meter replacement operation toolbox, and is used to establish a short-circuit bypass L1 and N1 branch of the electric meter; the power-taking device for the 2P air circuit breaker behind the meter is respectively connected to the 2P air circuit breaker behind the meter and the power-off-free operation toolbox, and is used to establish a short-circuit bypass L2 and N2 branch of the electric meter;

[0050] In this embodiment, the electric energy meter is a single-phase low-voltage electric energy meter.

[0051] In this embodiment, the inlet of the 2P air circuit breaker in front of the meter is connected to the zero-line busbar and the live-line busbar of the power supply line in front of the meter, and the outlet of the 2P air circuit breaker in front of the meter is connected to the electric energy meter, and is used to turn on and off the power of the electric energy meter when replacing the electric energy meter.

[0052] In this embodiment, the power-taking device in front of the meter includes: two alligator clips with insulating shells, and the two alligator clips with insulating shells are respectively connected to two first universal quick plugs with insulating shells through two first copper wires covered with insulating skin; the jaws of the alligator clip with insulating shell are made of metal copper and are connected to the first copper wire covered with insulating skin, and the alligator clip with insulating shell controls the opening and closing of the jaws by pressing.

[0053] In this embodiment, the power-taking device for the 2P air circuit breaker behind the meter includes a plastic kit and two copper pins with built-in springs. The plastic kit can be sleeved from the front of the 2P air circuit breaker behind the meter and fit tightly. The back of the plastic kit is symmetrically provided with a snap device, which clamps the rear case of the 2P air circuit breaker behind the meter after the plastic kit is sleeved into it.

[0054] Two copper pins with built-in springs are arranged below the plastic kit. When pressed, the copper pins can move back and forth following the springs. The inner sides of the two copper pins with built-in springs are located at the positions of the two outgoing line screws of the 2P air circuit breaker behind the meter. The outer sides of the two copper pins with built-in springs are respectively connected to two copper wires with a second layer of insulating skin. The other ends of the two copper wires with a second layer of insulating skin are respectively a second universal quick plug with an insulating shell and a third universal quick plug with an insulating shell. The copper pins with built-in springs are naturally extended in the natural state. When the plastic kit of the power-taking device for the 2P air circuit breaker behind the meter is sleeved into the 2P air circuit breaker behind the meter, the springs are compressed. At this time, under the action of the springs, the copper pins are in close contact with the outgoing line screws of the 2P air circuit breaker behind the meter, realizing power taking.

[0055] In this embodiment, the two alligator clips with insulating shells of the power-taking device in front of the meter are respectively clamped on the neutral busbar and the live busbar of the power supply line in front of the meter, and the two first universal quick plugs with insulating shells are connected to the first power grid power input port and the second power grid power input port of the power outage meter replacement operation toolbox; the power-taking device behind the meter is connected to the 2P air circuit breaker behind the meter, and the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell of the power-taking device behind the meter are respectively connected to the first user end output port and the second user end output port of the power outage meter replacement operation toolbox, and the power outage meter replacement operation toolbox is incorporated into the meter circuit to establish a meter short-circuit bypass.

[0056] In this embodiment, the power outage meter replacement operation toolbox includes: a first power grid power input port and a second power grid power input port, a first user end output port and a second user end output port, and a first digital voltmeter for measuring the voltage value between the first power grid power input port and the first user end output port; a second digital voltmeter for measuring the voltage value between the second power grid power input port and the second user end output port; the power outage meter replacement operation toolbox further includes: a 2P air circuit breaker and a digital rail meter; the 2P air circuit breaker is used to control the on-off of the meter short-circuit bypass; the digital rail meter is used for electric energy metering.

[0057] The functions and roles of the components of the present invention are as follows:

[0058] (1) Develop a power-taking device for the 2P air circuit breaker behind the meter

[0059] Develop a power-taking device for a 2P air circuit breaker behind the meter. Its main body is made of plastic and can be sleeved from the front of the 2P air circuit breaker behind the meter and fit tightly. The buckle on the back of the power-taking device for the 2P air circuit breaker behind the meter can hold the rear shell of the 2P air circuit breaker behind the meter, ensuring that it does not fall off naturally after being sleeved into the 2P air circuit breaker behind the meter. Two copper pins with built-in springs are installed inside the power-taking device for the 2P air circuit breaker behind the meter corresponding to the positions of the outgoing line screws of the 2P air circuit breaker behind the meter. The outside of the copper pins is connected to a copper wire covered with insulating skin, and the other end of the copper wire is a universal quick plug with an insulating shell. The copper pins extend naturally in the natural state. When the power-taking device for the 2P air circuit breaker behind the meter is sleeved into the 2P air circuit breaker behind the meter, the spring is compressed. At this time, under the action of the spring, the copper pins are in close contact with the outgoing line screws of the 2P air circuit breaker behind the meter to achieve power taking.

[0060] (2) Incorporate the power-off meter replacement operation toolbox into the meter circuit to establish a short-circuit bypass.

[0061] Prepare two copper wires with alligator clips at one end and universal quick plugs at the other end. Clamp the two alligator clip jaws on the neutral busbar and live busbar of the power supply line in front of the meter respectively, and connect the two universal quick plugs to the grid power input port of the power-off meter replacement toolbox; connect the power-taking device behind the meter to the 2P air circuit breaker behind the meter, and connect the two universal quick plugs at the other end of the power-taking device behind the meter to the user-side output interface of the power-off meter replacement operation box. Incorporate the power-off meter replacement operation toolbox into the meter circuit to establish a short-circuit bypass for the meter.

[0062] (3) Check the zero and live wire phases at the input and output ends.

[0063] Observe the two digital voltmeters on the power-off meter replacement operation toolbox. If the voltage is not 0, it means that the zero and live wire connections at the input and output ends are inconsistent, and the two universal quick plugs at the user-side output interface need to be swapped. When the voltage is 0, the zero and live wire connections at the input and output ends are consistent at this time.

[0064] (4) Reset the readings of the digital rail meter in the toolbox.

[0065] Press the reading reset button of the digital rail meter in the toolbox to reset the readings of the digital rail meter, which can be used to measure the electricity consumed by users during normal power consumption during power-off meter replacement and recover the electricity loss of the power supply enterprise.

[0066] (5) Power-off meter replacement

[0067] After all 4-way interfaces of the power-off meter replacement operation toolbox are correctly connected, there are two power supply circuits from the power supply line to the user load and they are in a parallel state. Close the 2P air circuit breaker in the power-off meter replacement operation toolbox. At this time, the short-circuit bypass of the meter is conducted. Disconnect the 2P air circuit breaker behind the meter and the 2P air circuit breaker in front of the meter in sequence, and the meter loses power, and then start the power-off meter replacement.

[0068] (5) Experimental verification

[0069] To verify the effectiveness of the product of the present invention, the present invention is actually applied to the site of replacing 18 low-voltage electric energy meters without power interruption in the Hedong Power Supply Service Center of State Grid Tianjin Chengdong Company. The real-time electricity load covers 0.5 kw - 12 kw. Through practical verification, this product can perfectly achieve the replacement of electric meters for low-voltage users without power interruption in a short time without damaging any lines, and at the same time accurately measure the electricity consumption of users.

[0070] The working principle of the present invention is as Figures 1 to 6 shown:

[0071] In Figure 1 , 1 is an alligator clip with an insulating shell, 2 is the first copper wire covered with insulating skin, and 3 is the first universal quick plug with an insulating shell, which can be connected to the grid power input port of the toolbox for replacing electric meters without power interruption. The jaws of the alligator clip 1 with an insulating shell are made of metallic copper and are connected to the first copper wire 2 covered with insulating skin. The alligator clip can control the opening and closing of the jaws by pressing.

[0072] In Figure 2 , 4 is a plastic kit that can be sleeved on the 2P air circuit breaker behind the meter, 5 is a snap device that can clamp the rear shell 13 of the 2P air circuit breaker behind the meter after the plastic kit 4 is sleeved on the 2P air circuit breaker behind the meter, 6 is a copper needle with a built-in spring. When pressed, the metallic copper needle can move back and forth with the spring. The other end of the copper needle is connected to the second copper wire 7 covered with insulating skin. 8 and 9 are respectively the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell, which can be connected to the dedicated user terminal output port of the toolbox for replacing electric meters without power interruption.

[0073] In Figure 3 , 10 is the incoming line screw of the 2P air circuit breaker behind the meter, 11 is the outgoing line screw of the 2P air circuit breaker behind the meter, 12 is the 2P air circuit breaker behind the meter, and 13 is the rear shell of the 2P air circuit breaker behind the meter.

[0074] In Figure 4 , 14 and 15 are respectively the first grid power input port and the second grid power input port, 16 and 17 are respectively the first user terminal output port and the second user terminal output port. Its 4 ports are universal interfaces and can insert universal quick plugs with insulating shells. 18 is the first digital voltmeter, which can be used to measure the voltage value between the first grid power input port and the first user terminal output port. 19 is the second digital voltmeter, which can be used to measure the voltage value between the first grid power input port and the second user terminal output port. 20 is a 2P air circuit breaker, 21 is a digital rail meter for electricity metering, 22 is the digital rail meter indication reset button. In Figure 5 , 23 is the 2P air circuit breaker in front of the meter.

[0075] The operation of replacing the low-voltage direct-connected energy meter without power interruption using the power-off meter replacement operation toolbox includes the following steps:

[0076] Take Figure 1 The two power-taking devices in front of the meter as shown, and respectively clamp the two alligator clips 1 with insulating shells on the neutral busbar and the live busbar of the power supply line in front of the meter.

[0077] Align the protruding parts of the two first general-purpose quick plugs 3 with insulating shells with the notches of the first power grid power input port 14 and the second power grid power input port 15 of the power-off meter replacement operation toolbox respectively, then vertically insert and rotate to the right. At this time, under the connection of the two first copper wires 3 covered with insulating skin, Figure 5 The L1 and N1 lines in [[ ]] are conducted.

[0078] Put Figure 2 Align the plastic kit 4 of the power-taking device behind the meter as shown with Figure 3 Place it directly in front of the 2P air circuit breaker 12 behind the meter as shown and press it inward. When you hear a click, the buckle device 5 clamps the rear shell 13 of the 2P air circuit breaker behind the meter. At this time, the spring of the copper needle 6 with an internal spring is compressed, and under the action of the spring, the copper needle is in close contact with the outgoing wire screw 11 of the 2P air circuit breaker behind the meter, and the incoming wire screw 10 of the 2P air circuit breaker behind the meter remains unchanged.

[0079] Align the protruding parts of the second general-purpose quick plug 8 and the third general-purpose quick plug 9 with insulating shells of the power-taking device behind the meter with the notches of the first user terminal output port 16 and the second user terminal output port 17 of the power-off meter replacement operation toolbox respectively, then vertically insert and rotate to the right. At this time, under the connection of the second copper wire 7 covered with insulating skin, Figure 5 The L2 and N2 lines in [[ ]] are conducted.

[0080] Observe Figure 4 The voltage values of the first digital voltmeter 18 and the second digital voltmeter 19 in the power-off meter replacement operation toolbox as shown.

[0081] If the values are not zero, it means that the zero and live wires at the input and output ends of the power-off meter replacement operation toolbox do not correspond. At this time, connect the second general-purpose quick plug 8 with an insulating shell to the second user terminal output port 17, and connect the third general-purpose quick plug 9 with an insulating shell to the first user terminal output port 16 to solve the problem.

[0082] If the values are all 0, it means that the zero and live wires at the input and output ends of the power-off meter replacement operation toolbox are consistent, and the energy meter short-circuit bypass is established.

[0083] Press the digital rail meter indication reset button 22 of the digital rail meter 21 to clear the digital rail meter reading.

[0084] Close the switch of the 2P air circuit breaker 20 in the non-stop meter replacement operation tool box, and the electric energy meter is short-circuited and bypassed.

[0085] First disconnect the switch of the 2P air circuit breaker 12 after the meter, then disconnect Figure 5 The switch of the 2P air circuit breaker 23 shown in the table is Figure 5 The L3, N3 and L4, N4 circuits are disconnected, the electric energy meter loses power, and the power supply company continues to supply power to users through the L1, N1 and L2, N2 circuits.

[0086] The user's electric energy meter starts to be replaced, and the digital rail meter 21 starts to measure the user's electric energy during the meter replacement period.

[0087] After replacing the energy meter, close the Figure 5 As shown in the table, the switch of the 2P air circuit breaker 23 in front of the table is turned on, and then the switch of the 2P air circuit breaker 12 in the back of the table is turned on. Figure 5 The L3, N3 and L4, N4 circuits are conductive.

[0088] Disconnect the switch of the 2P air circuit breaker 20 in the non-stop meter replacement operation tool box, short-circuit the electric energy meter and disconnect the bypass. The value displayed on the screen of the digital rail meter 21 is the amount of electricity generated by the user during the non-stop meter replacement period.

[0089] Press the buckle device 5 of the plastic kit 4 with both hands and bend it outward to remove the plastic kit 4 from the 2P air circuit breaker behind the meter, rotate the second universal quick plug 8 with insulating shell and the third universal quick plug 9 with insulating shell to the left and pull them out from the first user-end output port 16 and the second user-end output port 17.

[0090] Press the crocodile clamp 1 with an insulating shell on the power supply device in front of the meter, and detach the two crocodile clamp mouths from the neutral busbar and the live busbar of the power supply line in front of the meter respectively, and rotate the two first universal quick plugs 3 with insulating shells to the left and unplug them from the first grid power input port 14 and the second grid power input port 15 respectively. At this point, the meter replacement work without power outage is completed.

[0091] It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation modes. Any other implementation modes derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A non-power-off meter replacement operating system, characterized in that: include: Electric energy meter, 2P air circuit breaker in front of the meter, power supply device in front of the meter, 2P air circuit breaker after the meter, power supply device for 2P air circuit breaker after the meter and tool box for meter replacement without power outage; The electric energy meter is connected to the 2P air circuit breaker before the meter and the 2P air circuit breaker after the meter respectively, which is used for electric energy metering of residential users; the power taking device before the meter is connected to the non-stop meter replacement operation tool box, which is used to establish the meter short-circuit bypass L1 and N1 branches; the 2P air circuit breaker power taking device after the meter is connected to the 2P air circuit breaker after the meter and the non-stop operation tool box respectively, which is used to establish the meter short-circuit bypass L2 and N2 branches.

2. The non-power-off meter replacement operating system according to claim 1, characterized in that: The electric energy meter is a single-phase low-voltage electric energy meter.

3. The non-power-off meter replacement operating system according to claim 1, characterized in that: The inlet of the 2P air circuit breaker in front of the meter is connected to the neutral busbar and the live busbar of the power supply circuit in front of the meter, and the outlet of the 2P air circuit breaker in front of the meter is connected to the electric energy meter, which is used to power on and off the electric energy meter when replacing the electric energy meter.

4. The non-power-off meter replacement operating system according to claim 1, characterized in that: The pre-meter power supply device includes: two crocodile clamps with insulating shells, which are respectively connected to two first universal quick plugs with insulating shells through two first copper wires covered with insulating skins; the jaws of the crocodile clamps with insulating shells are metal copper, which are connected to the first copper wires covered with insulating skins, and the jaws of the crocodile clamps with insulating shells are opened and closed by pressing.

5. The non-power-off meter replacement operating system according to claim 1 or 4, characterized in that: The power taking device for the 2P air circuit breaker behind the meter includes a plastic kit and two copper pins with built-in springs. The plastic kit can be inserted from the front of the 2P air circuit breaker behind the meter and fit tightly. The back of the plastic kit is symmetrically provided with a snap device, which clamps the rear shell of the 2P air circuit breaker behind the meter after the plastic kit is inserted into the 2P air circuit breaker behind the meter. Two copper needles with built-in springs are arranged below the plastic kit. When pressed, the copper needles can move forward and backward following the springs. The inner sides of the two copper needles with built-in springs are located at the positions of the two outlet screws of the 2P air circuit breaker behind the meter. The outer sides of the two copper needles with built-in springs are respectively connected to two second copper wires covered with insulation skin, and the other ends of the two second copper wires covered with insulation skin are respectively the second universal quick plug with insulation shell and the third universal quick plug with insulation shell; the copper needle with built-in spring stretches naturally in a natural state. When the plastic kit of the power taking device of the 2P air circuit breaker behind the meter is put into the 2P air circuit breaker behind the meter, the spring is compressed. At this time, under the action of the spring, the copper needle is in close contact with the outlet screw of the 2P air circuit breaker behind the meter to achieve power taking.

6. The non-power-off meter replacement operating system according to claim 5, characterized in that: Clamp the two crocodile clamps with insulating shells of the power supply device in front of the meter onto the neutral busbar and the live busbar of the power supply line in front of the meter respectively, and connect the two first universal quick plugs with insulating shells to the first grid power input port and the second grid power input port of the non-stop power meter replacement operation tool box; Connect the power-drawing device behind the meter to the 2P air circuit breaker behind the meter, connect the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell of the power-drawing device behind the meter to the first user-end output port and the second user-end output port of the non-stop power meter replacement operation tool box respectively, incorporate the non-stop power meter replacement operation tool box into the meter circuit, and establish a short-circuit bypass for the meter.

7. The non-power-off meter replacement operating system according to claim 1, characterized in that: The non-power-off meter replacement operation toolbox includes: a first grid power input port and a second grid power input port, a first user-end output port and a second user-end output port, and a first digital voltmeter for measuring the voltage value between the first grid power input port and the first user-end output port; a second digital voltmeter for measuring the voltage value between the second grid power input port and the second user-end output port; the non-power-off meter replacement operation toolbox also includes: a 2P air circuit breaker and a digital rail meter; the 2P air circuit breaker is used to control the on and off of the short-circuit bypass of the meter; the digital rail meter is used for electric energy metering.

8. A method for replacing a low-voltage direct-entry electric energy meter without power outages using a non-power outage meter replacement operating system, characterized in that: The following steps are involved: Take two power supply devices in front of the meter, and clamp two crocodile clamps with insulating shells on the neutral busbar and live busbar of the power supply line in front of the meter respectively; Align the protruding parts of the two first universal quick plugs with insulating shells with the notches of the first grid power input port and the second grid power input port of the non-stop power meter replacement operation tool box, and then insert them vertically and rotate them to the right. At this time, under the connection of the two first copper wires covered with insulating skin, the L1 and N1 lines are connected; Align the plastic kit of the 2P power-taking device behind the meter with the front of the 2P air circuit breaker behind the meter, and press inwards; when you hear a click, the buckle device clamps the rear shell of the 2P air circuit breaker behind the meter, and the spring of the copper needle with the built-in spring is compressed. Under the action of the spring, the copper needle is in close contact with the outlet screw of the 2P air circuit breaker behind the meter, and the inlet screw of the 2P air circuit breaker behind the meter remains unchanged; Align the protruding parts of the second universal quick plug with an insulating shell and the third universal quick plug with an insulating shell of the 2P power taking device behind the meter with the notch positions of the first user-end output port and the second user-end output port of the non-stop power meter replacement operation tool box, and then insert them vertically and rotate them to the right. At this time, under the connection of the second copper wire covered with insulation, the L2 and N2 lines are turned on; Observe the voltage values ​​of the first digital voltmeter and the second digital voltmeter in the non-stop meter replacement operation tool box; If the value is not zero, it means that the zero and live wires of the input and output terminals of the non-stop meter replacement operation toolbox do not correspond. At this time, connect the second universal quick plug with an insulating shell to the second user end output port, and connect the third universal quick plug with an insulating shell to the first user end output port to solve the problem; If the values ​​are all 0, it means that the zero and live wires of the input and output terminals of the non-stop meter replacement operation toolbox are consistent, and the short-circuit bypass of the electric energy meter is established; Press the reset button of the digital guide rail indication value on the digital guide rail meter to reset the digital guide rail indication value to zero; Close the switch of the 2P air circuit breaker in the non-stop meter replacement operation tool box, and the energy meter will be short-circuited and bypassed; First, disconnect the switch of the 2P air circuit breaker after the meter, and then disconnect the switch of the 2P air circuit breaker before the meter. At this time, the L3, N3 and L4, N4 circuits are all disconnected, the electric energy meter loses power, and the power supply company continues to supply power to users through the L1, N1 and L2, N2 circuits; Start replacing the user's electric energy meter, and the digital rail meter will start measuring the user's electric energy during the meter replacement period; After the electric energy meter is replaced, first close the switch of the 2P air circuit breaker in front of the meter, and then close the switch of the 2P air circuit breaker behind the meter. At this time, the L3, N3 and L4, N4 circuits are connected; Disconnect the 2P air circuit breaker in the non-stop meter replacement operation tool box, short-circuit the electric energy meter and disconnect the bypass. The value displayed on the digital rail meter screen is the amount of electricity generated by the user during the non-stop meter replacement period. Press the buckle device of the plastic kit with both hands and bend it outward to remove the plastic kit from the 2P air circuit breaker behind the meter, rotate the second universal quick plug with insulating shell and the third universal quick plug with insulating shell to the left and pull them out from the first user-end output port and the second user-end output port; Press the crocodile clamp with an insulating shell on the power supply device in front of the meter, and detach the two crocodile clamp mouths from the neutral busbar and the live busbar of the power supply line in front of the meter respectively, rotate the two first universal quick plugs with insulating shells to the left and unplug them from the first grid power input port and the second grid power input port respectively, and the meter replacement work without power outage is completed.

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