| 铁芯正常时需要一点接地的原因 |
| 添加时间：2017/8/31 20:23:48 浏览次数： |
| 铁芯正常时需要一点接地的原因 The reason for the need for a little grounding 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。 When the transformer is in normal operation, there is an electric field between the live winding and the tank, while the iron core and other metal components are in the electric field. Due to uneven distribution of capacitance, field strength varies, if the core can not be grounded, it will produce charging and discharging phenomenon, and destroy the insulation strength of solid insulation and oil, so the iron 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. 当铁芯或其金属构件如有两点或两点以上(多点)接地时，则接地点间就会造成闭合回路，它键链部分磁通，感生电动势，并形成环路，产生局部过热，甚至烧毁铁芯。 When the core or the metal components such as two or more points (points) are connected to the ground, then place it will cause a closed loop, its key chain part of the magnetic flux, the induced electromotive force, and form a loop, local overheating, even burning core. |
| 上一页 变压器中铁芯的主要作用 |
| 下一页 变压器铁芯的作用 |
Copyright © 技术支持：遨游网络