AC line short circuit protection arrangement and detecting method

A technology for AC lines and protection devices, which is applied in the direction of overload protection devices, measuring devices, measuring electricity, etc., can solve the problems of short circuit of voltage lines and long inspection time, and achieve wide range of voltage lines, low cost and high practicability and ease of use

Inactive Publication Date: 2009-08-19
SHENZHEN CLOU ELECTRONICS
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Problems solved by technology

[0003]In order to solve the existing voltage circuit short circuit in the detection process of the electric energy meter, especially the technology that the more fault points of the vol

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  • AC line short circuit protection arrangement and detecting method
  • AC line short circuit protection arrangement and detecting method
  • AC line short circuit protection arrangement and detecting method

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Embodiment Construction

[0018] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] The invention adds an AC line short-circuit protection device on the basis of the original equipment, can timely and accurately judge the fault point of the AC voltage line short-circuit, and has the characteristics of simple wiring, strong anti-interference ability and wide applicable current and voltage range.

[0020] See figure 2 , The wiring diagram of the protection device of the electric energy meter in the technical scheme of the present invention, such as figure 2 As shown, the voltage line of each electric energy meter (meter position) on the original basis is connected with an AC line short circuit protection device, the equipment structure is very clear and simple, and the overall structure of the original electric energy meter detection equipment is not damaged. When a plurality of said electric energy meters are conn...

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Abstract

The invention relates to a protective device for the short current of alternating current circuit, and a detecting method thereof, wherein, the device comprises a current collecting unit, a voltage signal amplifying unit, a filtering unit, a comparator unit and a signal output unit which are sequentially connected. The detecting method comprises the following steps of: 1. collecting transient current generated by alternating current voltage source due to short circuit; 2. converting the transient current into a voltage signal, then amplifying the voltage signal and carrying out filtering processing to the voltage signal; 3. comparing the voltage signal after filtration with reference power supply; and 4. outputting an abnormal signal when the voltage signal is larger than the reference voltage of the reference power supply. In the technical proposal of the invention, when the protective device for the short current of voltage circuit is accessed into the voltage circuit with large power, the short circuit of voltage can be timely and accurately judged, time for manual fault point inspection can be saved, the aim of high efficiency and time-saving can be achieved, furthermore, the device has simple structure, convenient wiring and stable and reliable performance.

Description

Technical field [0001] The invention belongs to the field of centralized control of high-power AC voltage lines, and relates to a protection device and a detection method for automatic detection, alarm, protection and indication of short-circuits of AC high-voltage lines, and particularly relates to when the voltage line is connected to a large number of different loads , It can determine the automatic detection, alarm, protection and indication protection device and detection method of the short-circuit point position of the voltage line in time. Background technique [0002] Now is the 21st century, science and technology are advancing, electric power is developing, and it has entered into people's households. Of course, the metering tool-electric energy meter has also been widely used. As the number of electric energy meters continues to increase, the National Electricity Metering Center will inevitably require as many electric energy meters as possible for one-time testing by...

Claims

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Application Information

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IPC IPC(8): G01R1/36G01R31/08G01R31/02G01R35/04
Inventor 童友奇
Owner SHENZHEN CLOU ELECTRONICS
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