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How does Metering Transformer achieve accurate measurement of electric energy?

Release Time : 2024-11-07
Metering Transformer plays a key role in electric energy metering, and its accurate measurement is mainly achieved through the following aspects.

1. Accurate transformation ratio design

The transformation ratio of Metering Transformer is the basis for accurate measurement. During design, the turns ratio of the primary and secondary windings is accurately determined according to the voltage and current levels of the power system. For example, for voltage transformers, a reasonable turns ratio can accurately convert high voltage into a measurable low voltage value in proportion; for current transformers, a suitable transformation ratio can convert large current into small current, which is convenient for subsequent metering equipment to process. This precise transformation ratio design ensures the accurate proportional relationship between input and output signals, laying the foundation for the accuracy of electric energy metering.

2. High-quality core material

The core is one of the core components of Metering Transformer. High-quality core materials, such as high-permeability silicon steel sheets, have the characteristics of low loss and high magnetic permeability. This enables the transformer to effectively concentrate and conduct magnetic fields during operation, reducing hysteresis and eddy current losses. Lower losses mean less loss of electric energy during the conversion process, thus improving the accuracy of measurement. At the same time, good core materials can ensure the uniform distribution of the magnetic field, making the induced electromotive force in the winding more stable and accurate, which is conducive to accurate measurement of electric energy.

3. Precision winding manufacturing

The accuracy of the winding is crucial for Metering Transformer. The winding adopts a high-precision winding process to strictly control the number of turns and wire diameter of the winding. During the winding process, the tightness and uniformity of the winding must be ensured to avoid problems such as short circuits between turns or local resistance changes. Accurate turns ensure the accuracy of the transformation ratio, and uniform winding can make the current evenly distributed in the winding, reducing the measurement error caused by local current abnormalities. In addition, the insulation treatment of the winding is also very critical. Good insulation can prevent leakage and ensure that the electric energy measurement is not disturbed.

4. Collaboration with metering equipment

The Metering Transformer works with metering equipment such as electric meters to achieve accurate measurement. It accurately transmits the converted voltage and current signals to the electric meter, which calculates the electric energy based on these signals and pre-set parameters and algorithms. In this process, the interface between the Metering Transformer and the metering equipment must ensure the accuracy and stability of signal transmission and avoid signal distortion or attenuation, thereby ensuring the accuracy of the entire electric energy metering system.

Through the careful design and manufacturing of these key links, the Metering Transformer  can effectively achieve accurate metering of electric energy and provide reliable data support for the billing, monitoring and management of the power system.
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