Calculation method for power transformer clamping rings made from laminated insulating materials

Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264) Pub Date : 2001-10-16 DOI:10.1109/EEIC.2001.965760

K. Biggie, T. Prevost

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引用次数: 4

Abstract

In core-form oil-filled power transformers, clamping rings are used to hold a clamping force on the windings. In this paper, data is presented from mechanical tests conducted on complete rings, using a custom-built test fixture, specifically designed to simulate the forces and conditions seen on clamping rings in power transformers. The tests were conducted on laminated wood and laminated pressboard rings, in sizes typically seen in medium power transformers. Mechanical equations that most closely apply to a ring under these loading conditions were determined, and flexural strength, modulus of elasticity and shear strength calculations were performed. A new method for calculating clamping ring thickness was determined, based on the test data. For laminated pressboard, the new calculation method was compared to a previous calculation method. A statistical interpretation of the values obtained using the new calculation method vs. the test results is presented.

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电力变压器夹紧环层压绝缘材料的计算方法

在铁心型充油电力变压器中，夹紧环用于在绕组上保持夹紧力。在本文中，数据来自对完整环进行的机械测试，使用定制的测试夹具，专门设计用于模拟电力变压器夹紧环上的力和条件。测试是在中等功率变压器中常见的尺寸的层压木材和层压板环上进行的。确定了在这些载荷条件下最适合环的力学方程，并进行了弯曲强度、弹性模量和剪切强度的计算。根据试验数据，提出了一种新的计算夹紧环厚度的方法。对于层压板，将新计算方法与之前的计算方法进行了比较。对使用新计算方法获得的值与试验结果进行了统计解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings: Electrical Insulation Conference and Electrical Manufacturing and Coil Winding Conference (Cat. No.01CH37264)

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