| 铁芯正常时需要一点接地的原因 |
| 添加时间：2018/3/22 16:26:21 浏览次数： |
| 铁芯正常时需要一点接地的原因 The reason for a point to be grounded when the iron core is normal 变压器正常运行时，带电的绕组与油箱之间存在电场，而铁芯和其他金属构件处于该电场中。由于电容分布不均，场强各异，假如铁芯不可*接地，则将产生充放电现象，破坏固体绝缘和油的绝缘强度，所以铁芯必须有一点可靠接地。 In the normal operation of the transformer, there is an electric field between the charged winding and the tank, and the iron core and other metal components are in the electric field. Because of the uneven distribution of capacitance and different field strength, if the core cannot be grounded, it will cause charging and discharging phenomenon, and destroy the insulation strength of solid insulation and oil, so the core must have a reliable grounding. 铁芯由硅钢片组成，为减小涡流，片间有一定的绝缘电阻(一般仅几欧姆至几十欧姆)，由于片间电容极大，在交变电场中可视为通路，因而铁芯中只需一点接地即可将整叠的铁芯叠片电位箝制在地电位。 The iron core is composed of silicon steel sheet, in order to reduce the eddy current, the insulation resistance between certain (generally only a few ohms to tens of ohms), because the capacitance between the great visual pathway in an alternating electric field, so the core can only one point grounding the core lamination stack potential clamped at ground potential. |
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