Ui core lamination for transformer During normal operation, there is an electric field between the live winding and the fuel tank, and the core and other metal components are in the electric field. Because the capacitance is unevenly distributed, the field strength varies. If the core is not grounded, it will cause charging and discharging, which will destroy the insulation strength of the solid insulation and oil. Therefore, the core must have a little grounding.
The ui core lamination for transformer consists of silicon steel sheets. In order to reduce the eddy current, there is a certain insulation resistance between the sheets (generally only a few ohms to several tens of ohms). Since the inter-chip capacitance is extremely large, it can be regarded as a path in the alternating electric field. Therefore, the entire core stack potential can be clamped to the ground potential with only a little grounding in the core.
When the iron core or its metal parts are grounded at two or more points (multiple points), a closed loop will be formed between the grounding points, and the magnetic flux of the key chain portion will induce an electromotive force and form a loop to cause local overheating. And even burned the iron core.
The ui core lamination for transformer is only a little grounded and can be properly grounded. That is, the core must be grounded and must be grounded at one point. The failure of the iron core is mainly caused by two reasons. First, the short circuit caused by poor construction process, and secondly, multiple grounding due to accessories and external factors.