A multi-disc induction shunt

Abstract

The invention provides a multi-disk inductive shunt. The inductive shunt is composed of inductive shunt elements in cascade connection, wherein each level of inductive shunt element comprises a two-disk structure. The first two inductive shunt elements in cascade connection are inductive shunt elements of a two-level structure. The third inductive shunt element and the inductive shunt elements thereafter are either inductive shunt elements of a single-level structure or inductive shunt elements of a two-level structure. The core of each inductive shunt element of a two-level structure is composed of a main core and a shielding core, each inductive shunt element of a single-level structure is composed of a single main core, and the cores are made of a material with high magnetic conductivity. According to the multi-disk inductive shunt, the problem that a single-disk inductive shunt is of a small range is improved, the problem that the existing multi-disk inductive shunt is of low precision is solved, the load capacity of the multi-disk inductive shunt is greatly improved, and the complexity and cost of a current transformer calibration system are reduced.

Description

Technical field: [0001] The invention relates to a shunt, in particular to a multi-disc induction shunt. Background technique: [0002] With the development of AC power transmission and transformation technology, people put forward higher and higher requirements for the measurement and measurement of power frequency current in terms of range and accuracy. The earliest power frequency current measuring instrument is a large current resistor, which is customarily called As a shunt, so far, the shunt is still used to measure the power frequency current. The advantages of the resistive shunt are simple structure and high accuracy, but this kind of shunt will generate heat when used under high current. The change of the resistance value of the resistor consumes a lot of energy on the other hand. [0003] With the development of technology, current transformers based on the principle of transformers have generally replaced the original resistive shunts, especially new ferromagnet...

AI Technical Summary

Problems solved by technology

If the current ratio is set too much, the size of a single induction shunt is difficult to control, and the cost will increase greatly, and some current ratios cannot be covered, and the small range of a single-disk induction shunt limits its application.

[0005] The existing multi-disc induction shunt is composed of multi-level induction shunt elements cascaded. The induction shunt elements at each level are a single-stage structure with a core composed of a main iron core. The load capacity is not strong, and there is no magnetic shield to reduce magnetic errors. The error of the stage induction shunt element is large

And the induction shunt elements at all levels are directly connected, which will generate additional errors and the accuracy is relatively low

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