Charging cabinet residual current circuit breaker tripping circuit

Abstract

The utility model discloses a charging cabinet residual current circuit breaker trip circuit, comprising a master control device, a terminal of the master control device is connected with a relay RLY1, a terminal of the relay RLY1 is connected with a resistor R1, one end of the resistor R1 is connected with a mains supply zero line, a terminal of the relay RLY1 is connected with an output live wire, one end of the output live wire is connected with a circuit breaker KM1, and the other end of the output live wire is connected with a power supply. The wiring end of the circuit breaker KM1 is connected with a mains supply live wire, the wiring end of the circuit breaker KM1 is connected with an output null line, and one end of the output live wire and one end of the output null line are connected with a load device. According to the application, the resistor R1 and the relay RLY1 are connected in series between the output live wire and the mains supply zero line, when the relay RLY1 is closed, the current value of the loop is set to be I3 greater than 30mA, and the current I1 of the output live wire flowing through the circuit breaker KM1 is not equal to the current I2 of the output zero line, namely I1 = I2 + I3, so that the circuit breaker KM1 is triggered to release, and the compatibility is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a residual current circuit breaker tripping circuit of a charging cabinet. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. When leakage, overload, short circuit and other faults occur in the system, the circuit breaker can quickly cut off the fault mechanism in the system or cut off the entire power supply to prevent the fault from expanding and avoid causing huge economic losses and casualties.

[0003] The existing residual current circuit breaker can only respond to protection passively, or add an additional shunt release for active control, and the shunt release needs to be structurally adapted to the circuit breaker. Different types of shunt releases and circuit breakers are not compatible, so different specifications of residual current circuit breakers can be arbitrarily adapted. Utility Model Content

[0004] Based on the fact that the existing residual current circuit breaker can only respond to protection passively, or an additional shunt release is added for active control, and the shunt release needs to be structurally adapted to the circuit breaker, and different types of shunt releases and circuit breakers are not compatible, the circuit of the utility model can arbitrarily adapt to the control of residual current circuit breakers of different specifications.

[0005] The technical solution adopted by the utility model is: a charging cabinet residual current circuit breaker tripping circuit, including a main control device, the connection terminal of the main control device is connected to a relay RLY1, the connection terminal of the relay RLY1 is connected to a resistor R1, one end of the resistor R1 is connected to a mains neutral line, the connection terminal of the relay RLY1 is connected to an output live wire, one end of the output live wire is connected to a circuit breaker KM1, the connection terminal of the circuit breaker KM1 is connected to the mains live wire, the connection terminal of the circuit breaker KM1 is connected to the output neutral line, and one end of the output live wire and the output neutral line are connected to a load device.

[0006] Furthermore, the main control device includes DC12V, resistor R2, resistor R3 and i / o interface, the DC12V is arranged inside the main control device, the resistor R2 is connected to the wiring terminal of DC12V, the resistor R3 is connected to the wiring terminal of resistor R2, and the i / o interface is connected to the wiring terminal of resistor R3.

[0007] Furthermore, the resistor R1 is connected in series between the output live wire and the mains neutral wire.

[0008] Furthermore, the coil of the relay RLY1 is controlled by a control circuit of the main control device.

[0009] Furthermore, the mains live wire and the mains neutral wire are output to the load device through the output live wire, the output neutral wire and the circuit breaker KM1.

[0010] Furthermore, the output live line current and the output neutral line current of the circuit breaker KM1 are equal.

[0011] Furthermore, the maximum current difference between the output live line and the output neutral line is 30 mA.

[0012] Compared with the prior art, the present application has the following beneficial effects: by controlling the output of the AC neutral line and the AC live line to the load device through the circuit breaker KM1, under normal circumstances, the output live line current and the output neutral line current flowing through the circuit breaker KM1 are equal, and the equipment works normally; if an electric shock accident occurs, the current on the live line will pass through the human body or other circuits to create a path, and at this time the output live line and the output neutral line will have unequal currents. When the phase difference is above 30mA, the circuit breaker KM1 will be triggered to trip internally, and the circuit breaker KM1 will automatically disconnect. This is the passive triggering safety protection of the circuit breaker KM1. In the application scenario of the centralized charging cabinet, we connect a resistor R1 and a relay RLY1 in series between the output live line and the AC neutral line. When the relay RLY1 is energized, the current value of this circuit is set to I3>30mA. At this time, the output live line current I1 flowing through the circuit breaker KM1 is not equal to the output neutral line current I2, that is, I1=I2+I3. At this time, the circuit breaker KM1 will be triggered to trip, thereby improving compatibility.

[0013] To summarize, in the above technical solution, a resistor R1 and a relay RLY1 are connected in series between the output live wire and the AC neutral wire. When the relay RLY1 is energized, the current value of this circuit is set to I3>30mA. At this time, the output live wire current I1 and the output neutral wire current I2 flowing through the circuit breaker KM1 are not equal, that is, I1=I2+I3. At this time, the circuit breaker KM1 will be triggered to trip, thereby improving compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art 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 paying creative labor.

[0015] Figure 1 This is a tripping circuit diagram of the residual current circuit breaker of the charging cabinet in the utility model.

[0016] The main figures in this application are:

[0017] 1. Main control device; 101. DC12V; 102. Resistor R2; 103. Resistor R3; 104. I / O interface; 2. Relay RLY1; 3. Resistor R1; 4. AC neutral wire; 5. Output live wire; 6. Circuit breaker KM1; 7. AC live wire; 8. Output neutral wire; 9. Load device. DETAILED DESCRIPTION

[0018] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0019] In the following description, with reference to the accompanying drawings, several embodiments of the present application are described. It should be understood that other embodiments may also be used, and mechanical composition, structure, electrical and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used here are only to describe specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0020] Although the terms first, second, etc. are used to describe various elements or parameters in this article in some instances, these elements or parameters should not be limited by these terms. These terms are only used to distinguish one or parameter part from another or parameter. For example, the first end can be referred to as the second end, and similarly, the second end can be referred to as the first end, without departing from the scope of the various described embodiments. The first end and the second end are both describing one end, but unless the context clearly indicates otherwise, they are not the same end. Similar situations also include the first rotating shaft group and the second rotating shaft group, or the first shaft connection portion and the second shaft connection portion.

[0021] Furthermore, as used in this article, the singular forms "one", "an" and "the" are intended to include plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0022] This application proposes a residual current circuit breaker tripping circuit for a charging cabinet. Figure 1 As shown, the residual current circuit breaker tripping circuit of the charging cabinet in the present application includes a main control device 1, the wiring terminal of the main control device 1 is connected to a relay RLY12, the wiring terminal of the relay RLY12 is connected to a resistor R13, one end of the resistor R13 is connected to a mains neutral line 4, the wiring terminal of the relay RLY12 is connected to an output live wire 5, one end of the output live wire 5 is connected to a circuit breaker KM16, the wiring terminal of the circuit breaker KM16 is connected to a mains live wire 7, the wiring terminal of the circuit breaker KM16 is connected to an output neutral line 8, and one end of the output live wire 5 and the output neutral line 8 are connected to a load device 9;

[0023] It should be noted that the AC neutral line 4 and the AC live line 7 are output to the load device 9 through the circuit breaker KM16. Under normal circumstances, the current flowing through the output live line 5 and the output neutral line 8 of the circuit breaker KM16 is equal, then the equipment works normally and the circuit breaker KM16 will not be disconnected.

[0024] Further, the main control device 1 includes DC12V101, a resistor R2102, a resistor R3103 and an i / o interface 104, the DC12V101 is arranged inside the main control device 1, the resistor R2102 is connected to the wiring terminal of the DC12V101, the resistor R3103 is connected to the wiring terminal of the resistor R2102, and the i / o interface 104 is connected to the wiring terminal of the resistor R3103;

[0025] It should be noted that the i / o interface 104 is used to connect to external devices.

[0026] Furthermore, the resistor R13 is connected in series between the output live wire 5 and the mains neutral wire 4;

[0027] By connecting a resistor R13 and a relay RLY12 in series between the output live wire 5 and the AC neutral wire 4, when the relay RLY12 is energized, the current value of this circuit is set to I3>30mA. At this time, the output live wire 5 current I1 flowing through the circuit breaker KM16 is not equal to the output neutral wire 8 current I2, that is, I1=I2+I3, and the circuit breaker KM16 will be triggered to trip.

[0028] Furthermore, the coil of the relay RLY12 is controlled by the control circuit of the main control device 1, thereby realizing intelligent tripping control from the main control device 1 to the circuit breaker KM16.

[0029] Furthermore, the mains live wire 7 and the mains neutral wire 4 are output to the load device 9 via the output live wire 5 , the output neutral wire 8 and the circuit breaker KM16 .

[0030] Furthermore, the current of the output live line 5 and the output neutral line 8 of the circuit breaker KM16 are equal, and the maximum current difference between the output live line 5 and the output neutral line 8 is 30mA;

[0031] It should be noted that if an electric shock accident occurs, the current on the live wire will create a path through the human body or other circuits. At this time, the currents of the output live wire 5 and the output neutral wire 8 will be unequal. When the phase difference is above 30mA, the internal tripping of the circuit breaker KM16 will be triggered, and the circuit breaker KM16 will automatically disconnect. This is the passive triggering safety protection of the circuit breaker KM16.

[0032] Through the above specific implementation methods, the residual current circuit breaker tripping circuit of the charging cabinet in the present application can achieve the following effects: by controlling the output of the AC neutral line 4 and the AC live line 7 to the load device 9 through the circuit breaker KM16, under normal circumstances, the current of the output live line 5 and the output neutral line 8 flowing through the circuit breaker KM16 are equal, and the equipment works normally; if an electric shock accident occurs, the current on the live line will generate a path through the human body or other circuits. At this time, the output live line 5 and the output neutral line 8 will have unequal currents. When the phase difference is greater than 30mA, the circuit breaker KM16 will be triggered to trip internally, and the circuit breaker KM16 will automatically disconnect. This is the passive triggering safety protection of the circuit breaker KM16. In the application scenario of centralized charging cabinets, we connect a resistor R13 and a relay RLY12 in series between the output live wire 5 and the AC neutral wire 4. When the relay RLY12 is energized, the current value of this circuit is set to I3>30mA. At this time, the output live wire 5 current I1 flowing through the circuit breaker KM16 is not equal to the output neutral wire 8 current I2, that is, I1=I2+I3. At this time, the circuit breaker KM16 will be triggered to trip.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A residual current circuit breaker tripping circuit for a charging cabinet, characterized in that: The invention comprises a main control device (1), wherein the connection terminal of the main control device (1) is connected to a relay RLY1 (2), the connection terminal of the relay RLY1 (2) is connected to a resistor R1 (3), one end of the resistor R1 (3) is connected to a mains neutral line (4), the connection terminal of the relay RLY1 (2) is connected to an output live line (5), one end of the output live line (5) is connected to a circuit breaker KM1 (6), the connection terminal of the circuit breaker KM1 (6) is connected to a mains live line (7), the connection terminal of the circuit breaker KM1 (6) is connected to an output neutral line (8), and one end of the output live line (5) and the output neutral line (8) are connected to a load device (9).

2. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1 is characterized in that: The main control device (1) comprises a DC12V (101), a resistor R2 (102), a resistor R3 (103) and an I / O interface (104); the DC12V (101) is arranged inside the main control device (1); the resistor R2 (102) is connected to a connection terminal of the DC12V (101); the resistor R3 (103) is connected to a connection terminal of the resistor R2 (102); and the I / O interface (104) is connected to a connection terminal of the resistor R3 (103).

3. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1 is characterized in that: The resistor R1 (3) is connected in series between the output live wire (5) and the mains neutral wire (4).

4. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1, characterized in that: The coil of the relay RLY1 (2) is controlled by a control circuit of the main control device (1).

5. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1, characterized in that: The mains live wire (7) and the mains neutral wire (4) are output to a load device (9) via an output live wire (5), an output neutral wire (8) and a circuit breaker KM1 (6).

6. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1, characterized in that: The current of the output live line (5) and the output neutral line (8) of the circuit breaker KM1 (6) are equal.

7. The residual current circuit breaker tripping circuit of the charging cabinet according to claim 1, characterized in that: The maximum current difference between the output live wire (5) and the output neutral wire (8) is 30 mA.

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