An intelligent air switch, its matching cable and low-voltage power distribution system containing the same

Abstract

The present invention discloses an intelligent air switch, which is used to connect to a cable with an OID code printed on its surface. An OID identification device is provided at the cable connection interface of the intelligent air switch. The OID identification device is connected to the controller built into the intelligent air switch. The current setting value in the controller can be automatically adjusted and matched according to the different cables identified; the intelligent air switch also includes voltage and current detection sensors and an electric switch actuator respectively connected to the controller; the current setting value in the controller can be further automatically adjusted and matched according to the load power size. The present invention also discloses a cable matching the above-mentioned intelligent air switch, the cable surface is printed with an OID code, and cables with different current limits have different OID codes printed on their surfaces. The present invention also discloses a low-voltage power distribution system containing the above-mentioned intelligent air switch and its matching cable. The intelligent air switch of the present invention can automatically adjust its current setting value and has high safety.

Description

Technical Field

[0001] The present invention relates to the field of intelligent air switches, in particular to an intelligent air switch, a matching cable thereof and a low-voltage power distribution system containing the same. Background Art

[0002] As a current switching device, the current intelligent air switch has a built-in controller with a (tripping) current setting value that is generally fixed and cannot be adjusted. In actual use, it has the following defects: Since the intelligent air switch has requirements for its connecting cable when in use, there are generally no errors in the initial installation. However, when it is necessary to replace the cable, it will take a long time to know the current setting value of the intelligent air switch or there will be no suitable cable on site that matches the current setting value. As a result, there will be a problem of mismatch between the cable and the intelligent air switch, which will lead to power distribution accidents.

[0003] Therefore, the existing intelligent air switches still have inconveniences and defects in structure and use, and are in urgent need of further improvement. How to create a new intelligent air switch that can automatically follow and adjust the current setting value has become a goal that the industry needs to improve. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide an intelligent air switch which can automatically follow and adjust the current setting value and has high safety.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] An intelligent air switch is used to connect to a cable with an OID code printed on its surface. An OID identification device is provided at the cable connection interface of the intelligent air switch. The OID identification device is connected to a controller built into the intelligent air switch. The current setting value in the controller can be automatically adjusted and matched according to the different cables identified.

[0007] Furthermore, the OID identification device includes a CMOS sensor and an infrared tube connected thereto, and the CMOS sensor is connected to a controller.

[0008] Furthermore, the intelligent air switch also includes a voltage detection sensor, a current detection sensor and an electric switch actuator respectively connected to the controller; the current setting value in the controller can be adjusted according to the power of the load obtained by the voltage detection sensor and the current detection sensor.

[0009] Furthermore, the method for determining the current setting value in the controller is: after the current setting value in the controller is automatically adjusted and matched according to the identified different cables, the matched current setting value is used as the basic setting value, so that the current setting value is adaptively adjusted according to the load power size.

[0010] Furthermore, the adaptive adjustment of the current setting value according to the load power includes: the controller detects the distribution system parameters in real time through the voltage sensor and the current sensor, and records the parameter values ​​at the same time; the controller calculates the parameters recorded in the past day at regular intervals to obtain the load average power and peak power, and the adaptive current setting value Iz = average power P*n + peak power P*n1, where n and n1 are empirical coefficients.

[0011] Furthermore, n=5, n1=n / 5; and when the controller detects that the real-time power exceeds the adaptive current setting value Iz for a duration of 3 fundamental wave cycles, the electric switch actuator is controlled to cut off the circuit.

[0012] Furthermore, it also includes a built-in network module connected to the controller, and the built-in network module is used for wireless communication connection with a remote monitoring platform or a user terminal.

[0013] The second technical problem to be solved by the present invention is to provide a cable for use with the above-mentioned intelligent control switch, where the two can be matched without restrictions and no safety issues will arise.

[0014] In order to solve the above technical problems, the present invention further provides a cable for use with the above intelligent control switch, wherein an OID code is printed on the surface of the cable; cables with different current limits have different OID codes printed on their surfaces.

[0015] Furthermore, OID codes are continuously printed on the surface of the cable.

[0016] The third technical problem to be solved by the present invention is to provide a low-voltage power distribution system, in which the intelligent air switches used are highly adaptable and less prone to power distribution accidents caused by mismatching of tripping currents.

[0017] In order to solve the above technical problems, the present invention further provides a low-voltage power distribution system, including the above-mentioned intelligent air switch and a cable; the cable is connected to the cable connection interface of the intelligent air switch.

[0018] By adopting the above technical solution, the present invention has at least the following advantages:

[0019] 1. This invention combines OID recognition technology with intelligent air switches, improving both the intelligent air switches and the cables they use. An OID code is printed on the cable surface, and an OID recognition device is installed at the cable connection interface of the air switch. The OID recognition device is connected to the controller built into the intelligent air switch. With this arrangement, the current setting value in the controller can be automatically adjusted to match the identified cables. This intelligent air switch has strong adaptability, reduces the requirements for the cables connected to it, facilitates actual operation, and is less likely to cause power distribution accidents caused by mismatched trip currents.

[0020] 2. By setting up current and voltage detection sensors connected to the controller, the current setting value in the controller can be further automatically adjusted according to the load power size, which can solve the problem of not being able to get timely protection when the load current is too small and a short circuit fault occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a block diagram of the working principle of an intelligent air switch in one embodiment of the present invention;

[0023] Figure 2 This is a block diagram of the working principle of an intelligent air switch in another embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention combines OID recognition technology with intelligent air switches. OID is a two-dimensional optical identification code that identifies different contents through different combinations of codes. Figure 1 As shown, this embodiment provides an intelligent air switch for connecting to a cable with an OID code printed on the surface. An OID identification device is provided at the cable connection interface of the intelligent air switch. The OID identification device includes a CMOS sensor and an infrared tube connected thereto, wherein the CMOS sensor is connected to the built-in controller of the intelligent air switch, and the current setting value in the controller can be automatically adjusted and matched according to the different cables identified.

[0025] This embodiment provides a cable compatible with the aforementioned intelligent air switch. The cable surface is printed with an OID code. Cables with different current limits have different OID codes printed on their surfaces. The OID codes can be used to identify different cables. To ensure the identifiable information on the cable, the OID codes are printed densely and continuously on the cable surface.

[0026] During use, connect the cable to the cable connection port of the intelligent air switch. The infrared tube illuminates the cable surface, which is then reflected by the CMOS sensor. The CMOS sensor then feeds back to the controller, which performs conventional code reading and decoding. Finally, the intelligent controller automatically adjusts the current setting value to match the cable. This setting solves the problem of matching the intelligent air switch with the cable. From the perspective of cable identification, the intelligent air switch is matched to the cable in use, achieving high identification efficiency, strong practicality, and high safety.

[0027] Although the setting value of the above-mentioned intelligent air switch has been matched according to the cable specifications, which can avoid the cable burning due to excessive current, when the load in the circuit is small, its short-circuit current is also small. If the current setting value of the intelligent air switch after matching is too large, it cannot be cut off in time, which may easily cause short-circuit damage to electrical equipment and fail to be protected in time.

[0028] Therefore, if Figure 2 As shown, the intelligent air switch of the present invention also includes a voltage detection sensor, a current detection sensor, and an electric switch actuator, each connected to a controller. The controller determines the current setting value by automatically adjusting the current setting value in the controller based on the identified cables, using the matched current setting value as the base setting value, and adaptively adjusting the current setting value according to the load power. Specifically, the controller detects the distribution system parameters in real time using voltage and current sensors and records the parameter values. The controller calculates the recorded parameters over the past day at intervals of approximately 5 minutes to determine the average load power and peak power. The adaptive current setting value Iz = average power P*n + peak power P*n1, where n and n1 are empirical coefficients that can be adjusted based on daily usage experience. Generally, n = 5 and n1 = n / 5. When the controller detects that the real-time power exceeds this value for a period of time exceeding three fundamental wave cycles, it disconnects the circuit, thereby resolving the problem of insufficient load current and the lack of timely protection in the event of a fault.

[0029] As mentioned above, the intelligent air switch of the present invention is upgraded on the basis of the traditional air protection switch, adding a controller (MCU microcontroller), a voltage sensor, a current sensor and an electric switch actuator, and transforming the traditional air switch physical disconnection protection method into an automated control technology. Figure 2As shown, the above-mentioned intelligent air switch also includes a built-in network module connected to the controller. The Internet of Things cloud technology can be combined with the intelligent air switch to realize the collection of distribution operation data and equipment status, parameter warning, alarm and other intelligent power management. Due to its networking function, it not only has the functions of a traditional air switch, but also is upgraded to an intelligent air switch. It can realize remote warning and monitoring of power quality parameter data such as temperature, current, voltage, leakage, insulation monitoring, fault arc monitoring, power, power factor, harmonic content, etc. through the intelligent power safety monitoring platform. At the same time, remote intelligent control of the equipment can be achieved through the cloud platform and APP. When the parameters are abnormal, the controller of the intelligent air switch can control the automatic disconnection of the air switch. The air switch can also be remotely automatically disconnected through the platform model warning function. Similarly, the management personnel can remotely close and open the intelligent air switch at any time.

[0030] The above-mentioned intelligent air switch and its supporting cable are used in a low-voltage power distribution system; the intelligent air switch can automatically follow the supporting cable to adjust the current setting value, which can achieve accurate matching and avoid power distribution accidents caused by matching errors. It has high safety. In addition, the current setting value can also be adaptively adjusted according to the load power size, which can protect electrical equipment and avoid short-circuit damage to electrical equipment without timely protection. It is suitable for promotion and application.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications based on the technical content disclosed above, which all fall within the scope of protection of the present invention.

Claims

1. An intelligent air switch, characterized in that: Used to connect to cables with OID codes printed on their surfaces. An OID identification device is provided at the cable connection interface of the intelligent air switch. The OID identification device is connected to the controller built into the intelligent air switch. The current setting value in the controller is automatically adjusted to match the different cables identified. Cables with different current limits have different OID codes printed on their surfaces. The intelligent air switch also includes a voltage detection sensor, a current detection sensor and an electric switch actuator respectively connected to the controller; the current setting value in the controller is adjusted according to the power of the load detected by the voltage detection sensor and the current detection sensor; The method for determining the current setting value in the controller is as follows: after the current setting value in the controller is automatically adjusted and matched according to the identified different cables, the matched current setting value is used as the basic setting value, and the current setting value is adaptively adjusted according to the load power; The method of adaptively adjusting the current setting value according to the load power includes: the controller detects the power distribution system parameters in real time through the voltage sensor and the current sensor, and records the parameter values ​​at the same time; The controller calculates the parameters recorded in the past day at regular intervals to obtain the load average power and peak power. The adaptive current setting value Iz = average power P*n + peak power P*n1, where n and n1 are empirical coefficients.

2. The intelligent air switch according to claim 1, characterized in that: The OID identification device includes a CMOS sensor and an infrared tube connected thereto, and the CMOS sensor is connected to a controller.

3. The intelligent air switch according to claim 1, characterized in that: Said n=5, n1=n / 5; and when the controller detects that the duration of the real-time power exceeding the adaptive current setting value Iz reaches 3 fundamental wave cycles, it controls the electric switch actuator to cut off the circuit.

4. The intelligent air switch according to claim 1, characterized in that: It also includes a built-in network module connected to the controller, and the built-in network module is used for wireless communication connection with a remote monitoring platform or a user terminal.

5. A low voltage power distribution system, characterized in that: The intelligent air switch and the cable according to any one of claims 1 to 4 are included; the cable is connected to the cable connection interface of the intelligent air switch; The surface of the cable is printed with an OID code; cables with different current limits have different OID codes printed on their surfaces.

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