Motor remote current measuring system and measuring method
A technology of current measurement and motor power supply, applied in the direction of measuring electrical variables, motor generator testing, measuring devices, etc., can solve the problem of increasing the cost of current transformer equipment and manual installation, unable to display high current values, and large negative errors, etc. problems, to achieve the effect of low measurement cost, small load, and reduced transmission distance
Pending Publication Date: 2022-06-28
广州发展电力科技有限公司
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Problems solved by technology
However, when the load of the motor is heavy, the remote DCS current display is too small and the negative error is large, and even the current transformer current is saturated, so it cannot display a higher current value
In response to this situation, the common method in the prior art is to replace the current transformer with a larger capacity for monitoring, but this method will increase the equipment cost and labor installation cost of the current transformer
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[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
[0025] It should be understood that the step numbers used in the text are only for the convenience of description, and are not intended to limit the order in which the steps are performed.
[0026] It should be understood that the terms used in the specification of the present application are only for the purpose of describing particular embodiments and are not intended to limit the present application. As used in this specification and the appen...
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The invention discloses a motor remote current measuring system and method. The system comprises a motor power switch control cabinet, a current transmitter, a current transformer and a remote transmitter display screen. The current transmitter and the current transformer are arranged in the motor power switch control cabinet; the current transformer is used for converting a measured secondary current into a current signal through the current transmitter, and the current signal is transmitted to the remote transmitter display screen through a secondary loop cable to be displayed. According to the invention, the current transmitter is installed in the motor power switch control cabinet instead of being originally installed in a remote transmitter display screen, thereby reducing the transmission distance between the current transmitter and the current transformer, enabling the load of a current measurement secondary circuit to be reduced, and enabling the current measurement precision to be improved within the capacity range of the transformer. The device can accurately measure the current of the motor without changing the original cable and loop, and has the advantages of simple operation, low measurement cost and the like.
Description
technical field [0001] The present application relates to the technical field of motor remote current measurement, and in particular, to a motor remote current measurement system and measurement method. Background technique [0002] The remote current DCS monitoring of 6KV high-voltage motor is mainly measured by the current transformer in the power switch cabinet and the current transmitter on the transmitter screen between the centralized control electronic equipment at a distance of 200 meters, and the linear conversion of the DCS system AI card is used. Displays motor current. However, when the motor load is large, the remote DCS current shows a small negative error, and even the current transformer is saturated and cannot display a higher current value. In view of this situation, a common method in the prior art is to replace a current transformer with a larger capacity for monitoring, but this method will increase the current transformer equipment cost and labor insta...
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IPC IPC(8): G01R19/00G01R31/34
CPCG01R19/0092G01R31/34
Inventor 彭荣黄彩颜孟飞成维彬
Owner 广州发展电力科技有限公司