Low-voltage single-phase parallel and split controller

Abstract

The utility model provides a low-voltage single-phase parallel connection and disconnection controller, which comprises a wire inlet end used for being connected with a 220V alternating current power supply side, a wire outlet end used for being connected with a user load side, a manual interlocking phase converter used for switching a zero-phase line of a circuit system, and a circuit breaker used for controlling the user load side and the 220V alternating current power supply side to be parallel or disconnected, the manual interlocking phase converter is connected with the wire outlet end, and the disconnection circuit breaker is connected with the low-voltage power supply side wire inlet end and the manual interlocking phase converter. According to the low-voltage single-phase parallel and split controller, the manual interlocking phase converter and the parallel and split circuit breaker are arranged between the wire inlet end and the wire outlet end, so that a 220V alternating current power supply side connected with the wire inlet end and a user load side connected with the wire outlet end are parallel or split through the manual interlocking phase converter and the parallel and split circuit breaker; therefore, a residential user can replace the low-voltage intelligent meter without power failure.

Description

Technical Field

[0001] The utility model relates to the field of power grid control, in particular to a low-voltage single-phase parallel-separation controller. Background Art

[0002] In daily life, when residential users replace low-voltage smart meters, they need to first cut off the power supply of the circuit where the smart meter is located, and then replace the smart meter. This power-off replacement operation will cause inconvenience to users. Utility Model Content

[0003] In view of the above technical problems, the technical solution adopted by the utility model is:

[0004] According to one aspect of the present application, a low-voltage single-phase parallel-splitting controller is provided, comprising:

[0005] Inlet terminal, used to connect to 220V AC power supply side;

[0006] Outlet terminal, used to connect to the user load side;

[0007] A manual interlocking phase changer connected to the outgoing line terminal for switching the zero-phase line of the circuit system;

[0008] The parallel and disconnect circuit breaker is connected to the low-voltage switch cabinet, the incoming line terminal and the manual interlocking phase converter, and is used to control the parallel or disconnection of the user load side and the 220V AC power supply side.

[0009] In an exemplary embodiment of the present application, a first intermediate relay is provided on a connecting branch between an incoming line end and an outgoing line end.

[0010] In an exemplary embodiment of the present application, the first intermediate relay is connected to the second intermediate relay, and the second intermediate relay is also connected to the outlet terminal and the low-voltage switch cabinet.

[0011] In an exemplary embodiment of the present application, the second intermediate relay is further connected to a third intermediate relay, the third intermediate relay is connected to the incoming line terminal, and the third intermediate relay is arranged in parallel with the first intermediate relay.

[0012] In an exemplary embodiment of the present application, the first intermediate relay is connected to a phase error alarm indicator, and the phase error alarm indicator is used to issue an alarm prompt when a phase error occurs in the zero-phase line of the circuit system.

[0013] In an exemplary embodiment of the present application, a power supply load indicator light is provided on the connection branch between the parallel-decoupled circuit breaker and the manual interlocking phase converter, and the power supply load indicator light is used to light up when the user load side is connected to the 220V AC power supply side.

[0014] In an exemplary embodiment of the present application, an incoming line indicator light is provided on a connecting branch between the third intermediate relay and the incoming line end, and the incoming line indicator light is used to light up when the incoming line end is connected to a 220V AC power supply side.

[0015] In an exemplary embodiment of the present application, one end of an outlet indicator light is provided on a connecting branch between the second intermediate relay and the outlet end, and the other end of the outlet indicator light is connected to a connecting branch between the first intermediate relay and the outlet end, and the outlet indicator light is used to light up when the outlet end is connected to the user load side.

[0016] In an exemplary embodiment of the present application, an ammeter is provided on a connecting branch between the incoming line terminal and the parallel-decoupling circuit breaker, and the ammeter is used to monitor the current value of the incoming line terminal in real time.

[0017] In an exemplary embodiment of the present application, a voltmeter is connected to both ends of the incoming line terminal, and the voltmeter is used to monitor the voltage value of the incoming line terminal in real time.

[0018] The utility model has at least the following beneficial effects:

[0019] The low-voltage single-phase parallel-decoupling controller of the utility model arranges a manual interlocking phase changer and a parallel-decoupling circuit breaker between the incoming line end and the outgoing line end, so that the 220V AC power supply side connected to the incoming line end and the user load side connected to the outgoing line end can be paralleled or decoupled through the manual interlocking phase changer and the parallel-decoupling circuit breaker, so that residential users can replace low-voltage smart meters without power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A circuit schematic diagram of a low-voltage single-phase parallel-splitting controller provided in an embodiment of the utility model.

[0022] In the figure:

[0023] 1. Ammeter; 2. Parallel and disconnect circuit breaker; 3. Voltmeter; 4. Phase error alarm indicator; 5. First intermediate relay; 6. Second intermediate relay; 7. Third intermediate relay; 8. Incoming terminal indicator light; 9. Outgoing terminal indicator light; 10. Manual interlocking phase changer; 11. Incoming terminal; 12. Outgoing terminal; 13. Power supply load indicator light. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0025] The low-voltage single-phase parallel split controller described in this application is as follows: Figure 1 As shown, it includes an incoming line terminal 11, an outgoing line terminal 12, a manual interlocking phase changer 10, a parallel-disconnecting circuit breaker 2, a relay group, a wrong phase alarm indicator 4, a power supply load indicator light 13, an incoming line terminal indicator light 8, an outgoing line terminal indicator light 9, an ammeter 1 and a voltmeter 3, so as to realize non-stop power supply operation on the user load side connected to the outgoing line terminal 12.

[0026] Among them, the incoming line terminal 11 is connected to the 220V AC power supply side, the outgoing line terminal 12 is connected to the user load side, the incoming line terminal 11 is connected to the municipal power grid, and the user load side connected to the outgoing line terminal 12 can be the circuit side where the low-voltage smart meter that needs to be replaced is located.

[0027] The manual interlocking phase converter 10 is connected to the output terminal 12. The manual interlocking phase converter 10 is used to switch the zero-phase line of the circuit system. The manual interlocking phase converter 10 is a double-pole interlocking transfer switch, and its model may be GCB1-2P-C63A.

[0028] The parallel and decoupling circuit breaker 2 is connected to the low-voltage switch cabinet, the incoming line terminal 11 and the manual interlocking phase converter 10, and the parallel and decoupling circuit breaker 2 is used to control the parallel or decoupling of the user load side and the 220V AC power supply side. Parallelism is an operation in which the two power grids in the power system are in an asynchronous state, but the goal is to achieve the operation of merging and connecting two synchronous power grids. Parallelism merges two synchronous power grids to form a unified power network, so that the voltage, frequency and phase angle of all nodes of the parallel power network are kept synchronized. Decoupling is the reverse operation of parallelism, which means separating the two power systems that have been paralleled so that they can operate independently. Therefore, in the present application, parallelism is the operation of connecting the user load side to the 220V AC power supply side, and decoupling is the operation of separating the user load side after grid connection from the 220V AC power supply side, so as to realize the operation of not losing power on the user load side.

[0029] The relay group includes a first intermediate relay 5, a second intermediate relay 6 and a third intermediate relay 7. Figure 1As shown, the first intermediate relay 5 is arranged on the connecting branch between the incoming terminal 11 and the outgoing terminal 12, the second intermediate relay 6 is connected to the first intermediate relay 5, the outgoing terminal 12, and the low-voltage switch cabinet connected to the parallel disconnecting circuit breaker 2, the third intermediate relay 7 is connected to the second intermediate relay 6 and the incoming terminal 11, and the third intermediate relay 7 is arranged in parallel with the first intermediate relay 5.

[0030] The phase error alarm indicator 4 is connected to the first intermediate relay 5. The phase error alarm indicator 4 is used to give an alarm prompt when a phase error occurs in the zero-phase line of the circuit system. When one of the double-pole switches of the manual interlocking phase converter 10 is merged, observe the lighting state of the phase error alarm indicator 4. If the phase error alarm indicator 4 is on, it means that the zero-phase line connection is incorrect at this time and a phase error has occurred. Then, the other switch of the manual interlocking phase converter 10 is controlled to merge to avoid the grid being out of sync due to the phase error, which causes a failure in the parallel process.

[0031] The power supply load indicator light 13 is arranged on the connecting branch of the parallel-decoupling circuit breaker 2 and the manual interlocking phase converter 10, and the power supply load indicator light 13 is used to light up when the user load side is connected to the 220V AC power supply side.

[0032] The incoming terminal indicator light 8 is arranged on the connection branch between the third intermediate relay 7 and the incoming terminal 11. The incoming terminal indicator light 8 is used to light up when the incoming terminal 11 is connected to the 220V AC power supply side, indicating the connection status of the incoming terminal 11 and the 220V AC power supply side.

[0033] One end of the outlet indicator light 9 is arranged on the connection branch between the second intermediate relay 6 and the outlet terminal 12, and the other end of the outlet indicator light 9 is connected to the connection branch between the first intermediate relay 5 and the outlet terminal 12. The outlet indicator light 9 is used to light up when the outlet terminal 12 is connected to the user load side, indicating the connection status of the outlet terminal 12 and the user load side.

[0034] The ammeter 1 is arranged on a connecting branch between the incoming line terminal 11 and the parallel-splitting circuit breaker 2 , and the ammeter 1 is used to monitor the current value of the incoming line terminal 11 in real time.

[0035] The voltmeter 3 is connected to both ends of the incoming line terminal 11 , and the voltmeter 3 is used to monitor the voltage value of the incoming line terminal 11 in real time.

[0036] When the low-voltage single-phase parallel-splitting controller described in the present application is working, the initial state of the two switches of the manual interlocking phase changer 10 and the parallel-splitting circuit breaker 2 is disconnected. First, the incoming line terminal 11 is connected to the 220V AC power grid of the city power supply, and the outgoing line terminal 12 is connected to the user's load side. Close any switch of the double-pole switch of the manual interlocking phase changer 10, and observe the lighting state of the wrong phase alarm indicator 4. If the wrong phase alarm indicator 4 is not lit, it means that the zero-phase line connection is correct at this time. If the wrong phase alarm indicator 4 is lit, it means that the zero-phase line connection is wrong at this time, and a wrong phase has occurred. Then control the other switch of the manual interlocking phase changer 10 to merge until the wrong phase alarm indicator 4 is not lit. After the zero-phase line is connected correctly, close the parallel-splitting circuit breaker 2. At this time, the low-voltage single-phase parallel-splitting controller has been working normally, and the switch of the equipment that needs to be operated on the user's load side can be disconnected for replacement.

[0037] The low-voltage single-phase parallel-decoupling controller of the utility model arranges a manual interlocking phase changer and a parallel-decoupling circuit breaker between the incoming line end and the outgoing line end, so that the 220V AC power supply side connected to the incoming line end and the user load side connected to the outgoing line end can be paralleled or decoupled through the manual interlocking phase changer and the parallel-decoupling circuit breaker, so that residential users can replace low-voltage smart meters without power outages.

[0038] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A low voltage single phase parallel split controller, characterized in that: include: The incoming line terminal (11) is used to connect to the 220V AC power supply side; An outlet terminal (12) is used for connecting to a user's load side; A manual interlocking phase converter (10), connected to the output terminal (12), for switching the zero-phase line of the circuit system; The paralleling and decoupling circuit breaker (2) is connected to the low-voltage switch cabinet, the incoming line terminal (11) and the manual interlocking phase converter (10), and is used to control the paralleling or decoupling of the user load side and the 220V AC power supply side.

2. The low-voltage single-phase parallel-splitting controller according to claim 1, characterized in that: A first intermediate relay (5) is provided on a connecting branch between the incoming line terminal (11) and the outgoing line terminal (12).

3. The low voltage single phase parallel split controller according to claim 2, characterized in that: The first intermediate relay (5) is connected to a second intermediate relay (6), and the second intermediate relay (6) is also connected to the outlet terminal (12) and the low-voltage switch cabinet.

4. The low-voltage single-phase parallel-splitting controller according to claim 3, characterized in that: The second intermediate relay (6) is also connected to a third intermediate relay (7), the third intermediate relay (7) is connected to the incoming line terminal (11), and the third intermediate relay (7) is arranged in parallel with the first intermediate relay (5).

5. The low voltage single-phase parallel split controller according to claim 4, characterized in that: The first intermediate relay (5) is connected to a phase error alarm indicator (4), and the phase error alarm indicator (4) is used to issue an alarm prompt when a phase error occurs in the zero-phase line of the circuit system.

6. The low-voltage single-phase parallel-splitting controller according to claim 5, characterized in that: A power supply load indicator light (13) is provided on the connection branch between the parallel-decoupled circuit breaker (2) and the manual interlocking phase converter (10), and the power supply load indicator light (13) is used to light up when the user load side is connected to the 220V AC power supply side.

7. The low voltage single phase parallel split controller according to claim 6, characterized in that: An incoming line indicator light (8) is provided on a connection branch between the third intermediate relay (7) and the incoming line terminal (11), and the incoming line indicator light (8) is used to light up when the incoming line terminal (11) is connected to a 220V AC power supply.

8. The low voltage single phase parallel split controller according to claim 7, characterized in that: One end of an outlet terminal indicator light (9) is provided on a connecting branch between the second intermediate relay (6) and the outlet terminal (12), and the other end of the outlet terminal indicator light (9) is connected to a connecting branch between the first intermediate relay (5) and the outlet terminal (12), and the outlet terminal indicator light (9) is used to light up when the outlet terminal (12) is connected to a user load side.

9. The low-voltage single-phase parallel-splitting controller according to claim 8, characterized in that: An ammeter (1) is provided on a connecting branch between the incoming line terminal (11) and the parallel-decoupled circuit breaker (2), and the ammeter (1) is used to monitor the current value of the incoming line terminal (11) in real time.

10. The low voltage single phase parallel split controller according to claim 9, characterized in that: A voltmeter (3) is connected to both ends of the incoming line terminal (11), and the voltmeter (3) is used to monitor the voltage value of the incoming line terminal (11) in real time.

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