Coil pressure test device

Abstract

The invention relates to a coil pressure test device, which includes a device frame. The device frame is provided with an upper indenter and a lower indenter. The device frame is also provided with a transmission connection with at least one of the indenters to drive the upper indenter and the lower indenter to move relatively. The drive mechanism, the area for the coil is formed between the upper and lower pressure heads, the upper pressure head and / or the lower pressure head is provided with a pressure for the corresponding primary cable to pass through, so that the primary cable is passed through the inner hole of the coil Header cable piercing. When in use, the coil is placed between the upper and lower pressure heads, and the upper and lower pressure heads exert pressure on the coil, and the primary cable can pass through the pressure head cable on the upper pressure head and / or the lower pressure head to penetrate into the coil. In the inner hole, the primary cable induces current to the coil, so as to measure the current change of the coil during the pressure application process, so as to test the pressure state of the coil. Unqualified coils will not be assembled to the corresponding products. Compared with In the prior art, unqualified coils need to be removed from the product, which is much more convenient.

Description

technical field [0001] The invention relates to a coil pressure test device in the field of transformer coil pressure test. Background technique [0002] Current transformer coils need to withstand pressure during product assembly, operation, and casting. Whether it is an outdoor independent current transformer or a CT coil installed in GIS, the current domestic industry standard for installation is 6Kg / cm2, and an axial feed is required. Tighten the pressure to prevent the misalignment and sliding of the coil caused by the high-frequency vibration of the outgoing line during transportation and under the action of electrodynamic force. [0003] Especially for measuring coils, the current domestic design adopts ultra-microcrystalline iron cores (because the ultra-microcrystalline strips are thin, brittle and easy to break). Compared with the data, the changes are relatively large, and the measurement requirements cannot be met. For example, the surface of the LB500 coil bear...

AI Technical Summary

Problems solved by technology

[0003] Especially for measuring coils, the current domestic design adopts ultra-microcrystalline iron cores (because the ultra-microcrystalline strips are thin, brittle and easy to break). Compared with the data, the changes are relatively large, and the measurement requirements cannot be met. For example, the surface of the LB500 coil bears a pressure of about 6-8T

Therefore, it is necessary to test the use of the coil under pressure. At present, there is no special coil pressure test device. The test process is to assemble the current transformer into the product, and calculate the torque of the bolt to meet the requirement of 6Kg / cm2, and then repeat the test. For the test data of the current transformer, if the test data of the current transformer coil is unqualified, the product needs to be dismantled and the current transformer removed. The process of product removal is cumbersome, resulting in a certain degree of waste

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