Circuit capable of rapidly cutting off main switching power supply of distribution box

Abstract

The utility model discloses a circuit capable of rapidly cutting off a main switching power supply of a distribution box, and the circuit is characterized in that three live wires are connected to load equipment, and are sequentially connected in series with a second molded case circuit breaker and a first molded case circuit breaker; one end of any live wire between one end of the circuit and the first molded case circuit breaker and the second molded case circuit breaker is led out to be connected with a fuse and an indicating lamp in series, and the other end is connected with a null line. One end is led out between the fuse and the indicating lamp and is connected with a normally-opened and normally-closed button, the button is connected to a 13 # terminal of a first intermediate relay, a 14 # terminal of the first intermediate relay is connected with a null line N, the 13 # terminal is connected with a 9 # terminal, a 5 # terminal is connected with an A1 end of an alternating current contactor, and an A2 end of the alternating current contactor is connected with the null line N; the No.9 terminal and the No.5 terminal are in a normally open state under the condition of no power supply; and the A1 end is connected with the B1 end of the shunt trip coil, and the B2 end is connected with a null line N. According to the utility model, the power supply of the main open pipe of the distribution box can be quickly cut off, thereby buying time for an electric shock person to break away from a live conductor as early as possible and rescue the electric shock person.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical construction, and particularly relates to a circuit capable of quickly cutting off the main switch power supply of a distribution box. Background Art

[0002] When an electric shock incident occurs during construction at a construction site, bystanders are often in a state of panic. Sometimes, in their eagerness to save people, rescuers directly or indirectly rescue the electric shock victim with their hands, resulting in extremely serious consequences and causing more people to be injured. Therefore, in the first step, the main switch power supply must be cut off first before rescuing the electric shock victim. Considering construction safety, in view of the possibility of electric shock incidents at the construction site, how to cut off the main switch power supply of the primary box or secondary box in the first time through a remote control button or a close-range operation button to gain more precious rescue time for the electric shock victim is a technical problem that urgently needs to be solved in this field. Content of the Utility Model

[0003] In view of the above problems, the purpose of the utility model is to provide a circuit capable of quickly cutting off the main switch power supply of a distribution box, which can conveniently and quickly cut off the main switch power supply of the distribution box, enabling the electric shock victim to be separated from the live conductor as soon as possible and gaining time for the rescue of the electric shock victim.

[0004] The utility model provides a circuit capable of quickly cutting off the main switch power supply of a distribution box, including:

[0005] Three live wires L1 / L2 / L3 are connected to the input end of a load device. Starting from the input end, each live wire is successively connected in series to a second molded case circuit breaker and a first molded case circuit breaker, and the first molded case circuit breaker is equipped with a shunt trip coil.

[0006] One end of the circuit capable of quickly cutting off the main switch power supply of the distribution box is led out from any one of the live wires between the first molded case circuit breaker and the second molded case circuit breaker, and is successively connected in series to a fuse and an indicator light, and the other end is connected to the neutral wire N.

[0007] One end is led out from between the fuse and the indicator light and connected to a normally open and closed button. The normally open and closed button is connected to the 13# terminal of a first intermediate relay, and the 14# terminal of the first intermediate relay is connected to the neutral wire N; the 13# terminal of the first intermediate relay is connected to its 9# terminal, the 5# terminal of the first intermediate relay is connected to the A1 end of a contactor, and the A2 end of the contactor is connected to the neutral wire N; in the case of no power supply, the 9# terminal and the 5# terminal of the first intermediate relay are in a normally open state.

[0008] The A1 end of the contactor is connected to the B1 end of the shunt trip coil, and the B2 end of the shunt trip coil is connected to the neutral wire N.

[0009] In an embodiment of the present utility model, it further includes a single-phase remote control switch. The D1 terminal of the single-phase remote control switch is connected between the fuse and the normally open and closed button. The D3 terminal is connected to the neutral line N. The D2 terminal is connected to the 13# terminal of the second intermediate relay. The 14# terminal of the second intermediate relay is connected to the neutral line N. The 13# terminal of the second intermediate relay is connected to its 9# terminal. The 5# terminal of the second intermediate relay is connected to the B1 terminal of the shunt trip coil. When not powered, the 9# terminal and the 5# terminal of the second intermediate relay are in a normally open state.

[0010] The D4 terminal of the single-phase remote control switch is connected to an antenna. The circuit further includes a remote controller, which is wirelessly connected to the antenna and is used to control the circuit to cut off the power supply of the main switch of the distribution box.

[0011] In an embodiment of the present utility model, both ends of the normally open and closed button are respectively led to each floor of the construction site through wires. Multiple buttons or single-pole single-control switches are arranged on each floor, and the buttons and single-pole single-control switches between each floor are connected in series.

[0012] It should be understood that within the scope of the present utility model, the above-mentioned technical features of the present utility model and the technical features specifically described below (such as in the embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, they will not be elaborated one by one here.

[0013] Compared with the prior art, the present utility model has the following technical effects:

[0014] The present utility model is simple and easy to operate. When an electric shock event is discovered and there is a repair danger, within an effective signal source (5000 meters), the main switch power supply can be cut off by remote control, reducing further harm to construction workers, helping to win more time for rescuing electric shock victims, and reducing the probability of electric shock events. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present utility model will become more apparent.

[0016] Figure 1 FIG. shows the structural schematic diagram of the circuit for quickly cutting off the power supply of the main switch of the distribution box when not powered in an embodiment of the present utility model.

[0017] Reference numerals: 1 First molded case circuit breaker; 2 Second molded case circuit breaker; 3 Load equipment; 4 Fuse; 5 Indicator light; 6 Normally open and closed button; 7 First intermediate relay; 8 Contactor; 9 Shunt trip coil; 10 Single-phase remote control switch; 11 Second intermediate relay; 12 Antenna; 13 Remote controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, beneficial effects and remarkable progress of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, all the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0019] The present utility model will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0020] The mention of "embodiments" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of this article. The phrase appears in various positions in the specification and does not necessarily refer to the same embodiment, nor is it limited to mutually exclusive independent or alternative embodiments. Those skilled in the art should be able to understand that the embodiments in this article can be combined with other embodiments without structural conflict.

[0021] In the description of this article, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", and "connection" should be understood in a broad sense. It can be a movable connection, a fixed connection or integrated, or it can be connected through a certain connecting piece. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific situations.

[0022] In the description of this article, terms indicating orientation or positional relationships such as "upper", "lower", "left", "right", "horizontal", "vertical", "height", "length", "width", etc. are intended to accurately describe the embodiments and simplify the description, rather than limiting the parts or structures involved to have a specific orientation, be installed or operated in a specific orientation, and should not be construed as a limitation to the embodiments in this article.

[0023] In the description of this article, terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating relative importance or limiting the quantity, specific order or primary-secondary relationship of the described technical features. In the description of this article, the meaning of "a plurality" is at least two.

[0024] Embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present utility model will now be described in detail, examples of which are shown in the accompanying drawings. Whenever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0025] Figure 1The structural schematic diagram of the circuit without power supply of the general switch of the distribution box that can be quickly cut off according to an embodiment of the present utility model is shown. As Figure 1 shown, the present application provides a circuit that can quickly cut off the power supply of the general switch of the distribution box:

[0026] The three live wires L1 / L2 / L3 are connected to the input end of the load device 3. Starting from the input end, each live wire is successively connected in series to the second molded case circuit breaker 2 and the first molded case circuit breaker 1. The first molded case circuit breaker 1 is equipped with a shunt trip coil 9.

[0027] One end of the circuit that can quickly cut off the power supply of the general switch of the distribution box is led out from any one of the live wires between the first molded case circuit breaker 1 and the second molded case circuit breaker 2, and is successively connected in series to the fuse 4 and the indicator light 5, and the other end is connected to the neutral wire N.

[0028] One end is led out from between the fuse 4 and the indicator light 5 and connected to the normally open and closed button 6. The normally open and closed button 6 is connected to the 13# terminal of the first intermediate relay 7. The 14# terminal of the first intermediate relay 7 is connected to the neutral wire N; the 13# terminal of the first intermediate relay 7 is connected to its 9# terminal. The 5# terminal of the first intermediate relay 7 is connected to the A1 end of the AC contactor 8. The A2 end of the AC contactor 8 is connected to the neutral wire N; in the case of no power supply, the 9# terminal and the 5# terminal of the first intermediate relay 7 are in a normally open state. The A1 end of the AC contactor 8 is connected to the B1 end of the shunt trip coil 9, and the B2 end of the shunt trip coil 9 is connected to the neutral wire N.

[0029] When the normally open and closed button 6 is pressed, after the first intermediate relay 7 is powered on, the 9# and 5# terminals of the first intermediate relay 7 are connected, the AC contactor 8 is powered on and attracted, and the shunt trip coil 9 is powered on to cut off the power supply of the general switch of the distribution box.

[0030] In an embodiment of the present utility model, the circuit that can quickly cut off the power supply of the general switch of the distribution box further includes a single-phase remote control switch 10. The D1 end of the single-phase remote control switch 10 is connected between the fuse 4 and the normally open and closed button 6. The D3 end is connected to the neutral wire N. The D2 end is connected to the 13`# terminal of the second intermediate relay 11. The 14`# terminal of the second intermediate relay 11 is connected to the neutral wire N; the 13`# terminal of the second intermediate relay 11 is connected to its 9`# terminal. The 5`# terminal of the second intermediate relay 11 is connected to the B1 end of the shunt trip coil 9. In the case of no power supply, the 9`# terminal and the 5`# terminal of the second intermediate relay 11 are in a normally open state;

[0031] Terminal D4 of the single-item remote control switch 10 is connected to an antenna 12; the circuit further includes a remote controller 13, which is wirelessly connected to the antenna 12 and is used to control the circuit to cut off the power supply of the main switch of the distribution box.

[0032] When the remote controller 13 is pressed to turn on, the single-item remote control switch 10 is powered on, the second intermediate relay 11 is powered on and attracted, the 9`# and 5`# terminals of the second intermediate relay 11 are connected, the shunt trip coil 9 is powered on, and the power supply of the main switch of the distribution box is disconnected.

[0033] In an embodiment of the present utility model, both ends of the normally open and closed button are respectively led to each floor of the construction site through wires, and multiple buttons or single-pole single-control switches are arranged on each floor. The buttons and single-pole single-control switches between each floor are connected in series. At this time, pressing any button or single-pole single-control switch on any floor can disconnect the power supply of the main switch of the distribution box.

[0034] Furthermore, the installation height of the normally open and closed button, the buttons on each floor, and the single-pole single-control switch is preferably set at 1.3 m. The installation site should be selected in an environment without debris obstruction and easy to operate, so as to facilitate pressing the button in time to disconnect its power supply when an electric shock accident is found.

[0035] Compared with the prior art, the circuit of the present utility model that can quickly cut off the power supply of the main switch of the distribution box has the following beneficial effects:

[0036] The operation is simple and easy to understand. When an electric shock event and a repair danger are found, the power supply of the main switch of the distribution box can be quickly disconnected through the following three methods:

[0037] First, press the remote controller to disconnect the power supply of the main switch of the distribution box. This method can cut off the power supply of the main switch of the distribution box in the first time by remote control within an effective signal source (5000 m).

[0038] Second, press the normally open and closed button to disconnect the power supply of the main switch of the distribution box.

[0039] Third, press any button or single-pole single-control switch on each floor to disconnect the power supply of the main switch of the distribution box.

[0040] The present utility model can reduce further harm to construction workers, also win more time for rescuing electric shock victims, and reduce the probability of electric shock events.

[0041] The above describes the preferred embodiments of the present utility model. It should be understood that the present utility model is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present utility model. Therefore, all simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of protection of the technical solution of the present utility model.

Claims

1. A circuit that can quickly cut off the main switch power supply of the distribution box, characterized in that: include: The three live wires L1 / L2 / L3 are connected to the input end of the load equipment. Each live wire is connected in series with the second molded case circuit breaker and the first molded case circuit breaker from the input end. The first molded case circuit breaker is provided with a shunt tripping coil. One end of the circuit capable of quickly cutting off the main switch power supply of the distribution box is led out from any live wire between the first molded case circuit breaker and the second molded case circuit breaker, connected in series with a fuse and an indicator light in sequence, and the other end is connected to a neutral wire N; Lead out one end between the fuse and the indicator light, connect to a normally open / closed button, the normally open / closed button is connected to the 13# terminal of the first intermediate relay, the 14# terminal of the first intermediate relay is connected to the neutral line N; the 13# terminal of the first intermediate relay is connected to its 9# terminal, the 5# terminal of the first intermediate relay is connected to the A1 terminal of the AC contactor, the A2 terminal of the AC contactor is connected to the neutral line N; when not powered, the 9# terminal and the 5# terminal of the first intermediate relay are in a normally open state; The A1 end of the AC contactor is connected to the B1 end of the shunt tripping coil, and the B2 end of the shunt tripping coil is connected to the neutral line N.

2. The circuit capable of quickly cutting off the main switch power supply of the distribution box as claimed in claim 1, characterized in that: It also includes a single-phase remote control switch, wherein the D1 terminal of the single-phase remote control switch is connected between the fuse and the normally open and closed button, the D3 terminal is connected to the neutral line N, the D2 terminal is connected to the 13## terminal of the second intermediate relay, and the 14## terminal of the second intermediate relay is connected to the neutral line N; the 13## terminal of the second intermediate relay is connected to the 9## terminal thereof, the 5## terminal of the second intermediate relay is connected to the B1 terminal of the shunt tripping coil, and the 9## terminal and the 5## terminal of the second intermediate relay are in a normally open state when no power is supplied; The D4 end of the single-phase remote control switch is connected to an antenna; the circuit also includes a remote controller, which is connected to the antenna by wireless signal and is used to control the circuit to cut off the main switch power supply of the distribution box.

3. The circuit capable of quickly cutting off the main switch power supply of the distribution box as claimed in claim 1, characterized in that: Both ends of the normally open and normally closed buttons are respectively led to each floor of the construction site through wires, and multiple button boxes or single-gang single-control switch boxes are set on each floor, and the buttons and single-gang single-control switches between each floor are connected in series.

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