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Self-adaptive zero line broken protection device and system

A zero line disconnection and self-adaptive technology, applied in the direction of automatic disconnection emergency protection devices, emergency protection circuit devices, parts of emergency protection devices, etc., can solve the problem of no circuit breaker and three-phase load asymmetry Misoperation and other problems, to achieve the effect of saving space, easy management, quick and flexible troubleshooting

Active Publication Date: 2016-07-27
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the circuit breakers used in the low-voltage system do not have the detection function of neutral line breakage, and the current neutral line breakage protection principle proposed at present may cause malfunction when the three-phase load asymmetry is large

Method used

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  • Self-adaptive zero line broken protection device and system
  • Self-adaptive zero line broken protection device and system
  • Self-adaptive zero line broken protection device and system

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It is only stated here that the words for directions such as up, down, left, right, front, back, inside, and outside that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific to the present invention. limited.

[0022] see figure 1 , figure 1 It shows an embodiment of the adaptive zero line disconnection protection system of the present invention, which is applied to a 400V low-voltage power consumption system and used to protect the power consumption equipment of the user terminal 104 from damage.

[0023] The adaptive zero line disconnection protection system of the present invention includes a distribution transformer 100 , a low-voltage power distribution cabinet 1...

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Abstract

The invention discloses a self-adaptive zero line broken protection device. The self-adaptive zero line broken protection device comprises three phase line incoming terminals, three phase line outgoing terminals, a zero line incoming terminal, a zero line outgoing terminal, a current transformer, three voltage converters, a data processing unit, a switching quantity output circuit and a circuit breaker, wherein the current transformer is connected in serial between the zero line incoming terminal and the zero line outgoing terminal, the three-phase line incoming terminals and the three-phase line outgoing terminals are connected through the circuit breaker, each phase line incoming terminal and the zero line incoming terminal form a group of terminal to be connected in parallel to the input end of one of the voltage converters, the output ends of the three voltage converters and the current transformer are accessed to the data processing unit, and the data processing unit is connected with the circuit breaker by the switching quantity output circuit. The invention also discloses a self-adaptive zero line broken protection system. With the adoption of the device and the system, the zero-breaking detection function can be achieved by measuring three phase load voltages and zero line current, and the loss caused by zero line broken running is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to an adaptive zero line disconnection protection device and an adaptive zero line disconnection protection system. Background technique [0002] Most low-voltage electrical equipment adopts three-phase power supply. When the zero line of the low-voltage power distribution system is disconnected, the neutral point voltage at the user end will shift, resulting in a large area of ​​electrical appliances being burned, causing great economic losses to the user, and even causing personal electric shock accidents. Therefore, it is of great significance to accurately detect the disconnection of the neutral line of the low-voltage system and take reasonable protection measures to protect the property and personal safety of users. [0003] At present, the circuit breakers used in the low-voltage system do not have the detection function of neutral wire breakage, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/353H02H1/00
CPCH02H1/00H02H3/353
Inventor 曾永浩柳春芳何智祥梁唐杰李国平陈增胜张源滨黄智勇廖伟文孙广慧韦林汤永联李毅东黄劲峰陈铭乐马建良吴树钊
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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