Anti-low voltage reverse feed leakage protector

A leakage protector and electric signal technology, applied in emergency protection circuit devices, emergency protection devices for automatic disconnection, electrical components, etc., can solve problems such as hidden safety hazards in distribution network maintenance operations and affect the quality of distribution network power supply, and achieve production And promote the effect of easy to use, simple structure, and safety

CN103219703BActive Publication Date: 2015-08-26STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2015-08-26

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Abstract

The invention discloses a leakage protector for preventing low voltage inverse power transmission. The protector comprises an electromagnetic induction signal generator, a power directional element, an electric signal control loop, and a tripping and disconnecting device, wherein an input port of the electric signal control loop is electrically connected with the electromagnetic induction signal generator, and is electrically connected with an output port of the power directional element, an output port of the electric signal control loop is electrically connected with the tripping and disconnecting device, and an input port of the power directional element is electrically connected with a load line. The leakage protector for preventing the low voltage inverse power transmission disclosed by the invention has the characteristics that 1, the protector has a leakage protection function and a protective function of preventing low voltage inverse power transmission of a user side; 2, the protector has a simple structure and is convenient to install and replace; 3, the practicability is strong, and the safety of the user side and the distribution network overhaul operation is guaranteed; and 4, the input cost is low, the protector is easy to produce, use and popularize, and has a wide application prospect.
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Description

technical field

[0001] The invention relates to a low-voltage automatic control switchgear, in particular to a low-voltage reverse transmission leakage protector suitable for low-voltage residential users. Background technique

[0002] At present, many small family workshops have their own small generators. Once the power fails, they will use them for their own use, and the small generators will send power to the distribution network lines in reverse. Modern life is inseparable from computers. In order to prevent data loss due to sudden power outages, especially large companies, large companies have their own UPS inverter power supply, and the UPS inverter power supply will also send power back to the distribution network lines. With the continuous development and utilization of new energy, many users have installed solar cells, and the solar cells will also send power to the distribution network lines in reverse. It is difficult to supervise 100% self-provid...

Examples

Embodiment 1

[0030] A leakage protector against low-voltage reverse transmission, such as Figure 1-8 As shown, it includes electromagnetic induction signal generator, power direction element, electric signal control circuit, and tripping device. The electromagnetic induction signal generator is divided into two types: single-phase power supply and three-phase power supply, and the working principle is the same: when there is a changing magnetic flux in the electromagnetic coil of the electromagnetic induction signal generator, the output terminal of the electromagnetic induction signal generator has an electrical signal output. The power directional element is an integrated module capable of discriminating power directionality and deriving reverse electric energy signals. The electrical signal control loop is an integrated circuit that rectifies and amplifies the signal current output by the electromagnetic induction signal generator or the signal current output by the power directional e...