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Slip line resistance selection and advantages of 3 Phase EI Lamination with holes
Mar 21, 2018

3 Phase EI Lamination with holes is mainly composed of silicon steel sheet during the manufacture of the model. To a certain extent, in order to reduce the eddy current, there will be a certain insulation resistance between the sheets, and during the operation, the capacitance between the sheets will be extremely large. This can be regarded as a path in the alternating electric field, so that only a single point of the ground in the core can clamp the entire lamination stack potential to ground potential.

If there are two or more grounding points in 3 Phase EI Lamination with holes or other metal components, the grounding time will directly result in a closed loop, and the magnetic flux in the key chain will induce an electromotive force. And the formation of a loop, resulting in local overheating, and even burned iron core. Only one point of the transformer core grounding is the normal grounding. That is, the core must be grounded and must be a point grounded..

If the 3 Phase EI Lamination with holes has external grounding lines, when the fault current is large, the ground line can be temporarily turned on, but monitoring must be strengthened. This can effectively prevent the iron core from appearing after the fault point disappears Suspension potential..

If there is 3 Phase EI Lamination with holes, the multi-point fault is unstable. In the course of operation, a slip line resistor may be directly shunted into the working ground line to limit the current to 1A or less. The selection of the wire resistance is to divide the measured voltage of the open normal grounding wire by the current on the ground wire.


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