Adjustable voltage detection and live display device for over-voltage protection
A charged display device and voltage detection technology, which is applied in the direction of measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve problems such as delays, and achieve the effect of simple and reliable structure
Active Publication Date: 2015-02-04
STATE GRID CORP OF CHINA +2
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Problems solved by technology
In addition, for overvoltage protection, voltage transformer detection is generally adopted, after judgment, and then sent to the relay protection device, which has passed through the voltage transformer and detection device, which brings a certain delay
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0023] The invention provides an adjustable voltage detection and charging display device for overvoltage protection, such as figure 1 , the device includes a metal plate 1, a metal needle 2, a detection resistor R 2 and detection circuit; the metal needle 2 is perpendicular to the metal plate 1, and there is a gap between the metal plate 1, and the root of the metal needle 2 is connected to the detection resistor R through the connecting wire 2 Linked at one end, the sense resistor R 2 The other end is grounded, and the detection circuit is connected in parallel with the detection resistor R through the connection line 2 ends. When there is an AC voltage in the circuit, the small capacitive current flowing through the needle plate structure and the possible corona current will generate a voltage drop on the series resistance, and the voltage signal can be...
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The invention provides an adjustable voltage detection and live display device for over-voltage protection. The device comprises a metal plate, a metal pin, a detection resistor and a detection loop, wherein the metal pin is perpendicular to the metal plate and a gap is remained between the metal plate and the metal plate; the root part of the metal pin is connected with one end of the detection resistor through a connecting line; the other end of the detection resistor is grounded; the detection loop is connected in parallel to the two ends of the detection resistor through a connecting line. The adjustable voltage detection and live display device for over-voltage protection has the advantage of simple and reliable structure, has an adjustable function, and can be used for measuring voltage, live display and over-voltage protection. Prototype experiments prove the effectiveness of the mechanism. The device can be applied to voltage measurement, live display and over-voltage protection.
Description
technical field [0001] The invention relates to a device, in particular to an adjustable voltage detection and charging display device for overvoltage protection. Background technique [0002] The high-voltage live display device is of great significance to the safe operation of the power system. This type of device can be divided into two types according to whether it has a ground wire or not. The former needs a current-limiting resistor or a current-limiting capacitor, which has few functions, but is simple in design and low in cost; the latter has more functions, but The design is complicated, the cost is high, and the application is less. In principle, it can be divided into three types: non-contact induction type, contact type and equipotential type. Among them, the non-contact induction type has a simple structure and is widely used, while the contact type structure is slightly complicated, but it can meet the electrical requirements when combined with new communicati...
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IPC IPC(8): G01R19/00
Inventor 田鑫赵波杨柳荆平全成浩沈方孙刚宋颖巍张明理刘岩梁毅宋卓然龚树东赵德伟
Owner STATE GRID CORP OF CHINA