Method for indicating safety state of circuit breaker by using temperature sensitive material layer

Abstract

The invention discloses a method for indicating a safety state by using a temperature-sensitive material layer for a circuit breaker. The method comprises the following steps: S10, arranging the temperature-sensitive material layer on a non-electric contact surface of a fastening screw or a wiring frame of the circuit breaker; s20, when the temperature of the circuit breaker reaches a set limit threshold value, the temperature-sensitive material layer changes color; and S30, performing circuit breaker safety detection by a worker according to the color changing state, and replacing a circuit breaker fastening screw or a wiring frame non-electric contact surface where the color-changing temperature-sensitive material layer is located. The temperature-sensitive material is used on the non-electric contact surface of the fastening screw or the wiring frame of the circuit breaker, color change display can be realized when virtual connection occurs in fastening and setting of the circuit breaker and high temperature is generated, whether the circuit breaker is in virtual connection or not can be judged according to the surface color of the fastening screw, and the use safety of the circuit breaker is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a method for a circuit breaker to indicate a safe state by using a temperature sensitive material layer. Background Art

[0002] During the use of the circuit breaker, the wiring basket or fastening screws may get stuck. Workers who tighten the fastening screws often judge by touch that the fastening screws are tightened, but in fact they are loosely connected. When a large current flows through, the terminals will heat up, and it is not easy to find the fault point before the fault expands. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for a circuit breaker to indicate a safe state using a temperature sensitive material layer.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A method for a circuit breaker to indicate a safe state using a temperature sensitive material layer, comprising the following steps:

[0006] Arrange a temperature-sensitive material layer on the circuit breaker fastening screws or the non-electrical contact surface of the wiring frame;

[0007] When the temperature of the circuit breaker reaches the set limit threshold, the temperature-sensitive material layer changes color;

[0008] The staff conducts a safety inspection of the circuit breaker based on the discoloration status and replaces the circuit breaker fastening screws or non-electrical contact surface of the wiring frame where the temperature-sensitive material layer that has changed color is located.

[0009] In a possible implementation manner, the color change temperature of the temperature-sensitive material layer is set as a threshold value for safe operation of the circuit breaker.

[0010] In a possible implementation manner, the color change temperature of the temperature-sensitive material layer is set to a plurality of segmented values, and different temperature-sensitive material layers are set at different color change temperatures to display different colors.

[0011] The present invention has the following beneficial effects: by using temperature-sensitive materials on the non-electrical contact surface of the circuit breaker fastening screws or the wiring frame, when the circuit breaker is fastened and a loose connection occurs and high temperature is generated, the color will change to display, and whether the circuit breaker is loosely connected can be judged from the surface color of the fastening screws, which greatly improves the safety of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A flowchart of a method for a circuit breaker to indicate a safe state using a temperature sensitive material layer according to an embodiment of the present invention;

[0013] Figure 2 It is a schematic diagram showing the normal temperature of a circuit breaker when it is fastened and settled in a specific application example of the present invention;

[0014] Figure 3 This is a display purpose of the temperature of the fastening and settling of the circuit breaker in a specific application example of the present invention to reach the temperature of the temperature-sensitive material. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1 , which is a flowchart of a method for a circuit breaker to indicate a safe state using a temperature sensitive material layer according to an embodiment of the present invention, comprising the following steps:

[0017] S10, providing a temperature-sensitive material layer on the circuit breaker fastening screws or the non-electrical contact surface of the wiring frame;

[0018] S20, when the temperature of the circuit breaker reaches the set limit threshold, the temperature-sensitive material layer changes color;

[0019] S30, the staff performs a safety inspection of the circuit breaker according to the discoloration state, and replaces the circuit breaker fastening screws or the non-electrical contact surface of the wiring frame where the temperature-sensitive material layer that has changed color is located.

[0020] In a specific application example, in S10, the screws used on the circuit breaker can be pre-immersed in a color-changing material. According to the temperature you want to set, color-changing materials of different colors can be pre-prepared, and the color-changing temperature of the temperature-sensitive material layer is set as the threshold for safe operation of the circuit breaker. The color-changing temperature of the temperature-sensitive material layer can be set to multiple segmented values, and different temperature-sensitive material layers are set at different color-changing temperatures to display different colors. For example, blue, green, purple, red, etc., when a certain temperature is reached, the screws display different colors. When the circuit breaker is overloaded and the temperature rises, the screws cannot be restored after displaying the corresponding color. You can directly replace them with new screws. Since the screws themselves are very low in cost and easy to replace, the role of the indicator color can eliminate hidden dangers in advance, so there is no need to replace the entire circuit breaker, which actually saves costs.

[0021] In a specific application example, a two-color scheme is used for color change display. When the temperature is less than the limit threshold, it is metallic color or other custom colors. When the temperature is greater than the limit threshold, the color of the wiring component gradually changes to red (or custom alarm color).

[0022] In a specific application example, a multi-color scheme is used for color change display. When the temperature is less than the limit threshold, a gradient color band is used to represent different temperature groups. When the temperature is greater than the limit threshold, the color of the wiring component gradually changes to red (or a custom alarm color). For example: when the temperature is less than 0 degrees, it is white; when the temperature is greater than 0 degrees and less than 25 degrees, it is green; when the temperature is greater than 25 degrees and less than 45 degrees, it is blue; when the temperature is greater than 45 degrees and less than 65 degrees, it is yellow; when the temperature is greater than 65 degrees and less than 85 degrees, it is purple; when the temperature is greater than 85 degrees, it is red.

[0023] The method of using a temperature-sensitive material layer to indicate a safe state of a circuit breaker as set above can be applied to all circuit breakers that require the use of screws, including older circuit breakers that are relatively old. To achieve the purpose of monitoring the temperature safety of circuit breakers, there is no need to replace more advanced and expensive circuit breakers with monitoring functions. Instead, the screws soaked in a color-changing coating material can be directly replaced, which is simple, convenient and highly safe.

[0024] It should be understood that the exemplary embodiments described herein are illustrative rather than restrictive. Although one or more embodiments of the present invention have been described in conjunction with the accompanying drawings, it should be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A method for a circuit breaker to indicate a safe state using a temperature sensitive material layer, characterized in that: The following steps are involved: Arranging a temperature-sensitive material layer on the circuit breaker fastening screws or the non-electrical contact surface of the wiring frame; When the temperature of the circuit breaker reaches the set limit threshold, the temperature-sensitive material layer changes color; The staff conducts a safety inspection of the circuit breaker based on the discoloration status and replaces the circuit breaker fastening screws or non-electrical contact surface of the wiring frame where the temperature-sensitive material layer that has changed color is located.

2. The method for indicating a safety state of a circuit breaker using a temperature sensitive material layer as claimed in claim 1, characterized in that: The color change temperature of the temperature-sensitive material layer is set as a threshold value for safe operation of the circuit breaker.

3. The method for indicating a safety state of a circuit breaker using a temperature sensitive material layer as claimed in claim 1, characterized in that: The color change temperature of the temperature-sensitive material layer is set to a plurality of segmented values, and different temperature-sensitive material layers are set at different color change temperatures to display different colors.

Images