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Voltage change ratio detector

A voltage change rate and detector technology, applied in the direction of change rate measurement, etc., can solve the problem that there is no high-precision voltage change rate detection device, and achieve the effect of reliable voltage change and detection of voltage change

Active Publication Date: 2009-06-03
SHANGHAI JINGYI ELECTRICAL APPARATUS FACTORY CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

So far, there is no special high-precision voltage change rate detection device

Method used

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  • Voltage change ratio detector

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing.

[0019] Such as figure 1 As shown, the voltage change rate detector includes an input port, a voltage conversion unit, a signal processing output unit, and an output port. The input port, the voltage conversion unit, the signal processing output unit and the output port are connected to each other; the three-phase The voltage is sent to the voltage conversion unit through the input port, and the voltage conversion unit converts the voltage proportionally into a low-voltage signal that can be processed by the signal processing output unit. After the signal processing output unit processes the signal, the voltage change rate signal is passed through the output port. output.

[0020] The input port includes three-phase voltage input terminals AIN, BIN, CIN and neutral terminal N; the voltage conversion unit includes voltage protection devices YA, YB, YC and a voltage converter...

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Abstract

The invention relates to a voltage change ratio detector which comprises an input port, a voltage converter unit, a signal processing output unit and an output port. The input port, the voltage converter unit and the signal processing output unit are mutually connected with the output port. Three-phase voltage in industrial electrical network is input into the voltage switching unit by the input port. The voltage converter unit switches the voltage into low voltage signals which can be processed by the signal processing output unit in proportion. After the processing calculation is carried out on the signals by the signal processing output unit, the signals of the voltage change ratio are output by the output port. Compared with the prior art, the voltage change ratio detector has the advantage of detecting voltage changes accurately and reliably.

Description

technical field [0001] The invention relates to voltage detection, in particular to a voltage change rate detector. Background technique [0002] The voltage parameters in the industrial power grid are an important basis for implementing automatic control and protecting electrical equipment. For example, a sharp drop in the output voltage of power supply equipment (transformers, generators, etc.) means overload, or even a short circuit. In addition, if the three-phase unbalanced load is disconnected in the neutral line, the voltage of a certain phase will rise and damage the electrical equipment. Therefore, it is very important to detect abnormal changes in voltage in advance. Detection of voltage changes is voltage change rate (du / dt) detection. So far, there is no special high-precision voltage change rate detection device. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a reliable and accurate voltage chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/12
Inventor 胡正业
Owner SHANGHAI JINGYI ELECTRICAL APPARATUS FACTORY CO LTD