Grounding points of core sheets for transformer and electromagnetic induction system

- Jun 07, 2019-

The main magnetic circuit part of the core sheets for transformer in the course of its work. It is usually made up of hot-rolled or cold-rolled silicon steel sheets with a high silicon content and a surface coated with an insulating varnish. The iron core and the coil wound thereon form a complete electromagnetic induction system. The amount of power transmitted by the power transformer depends on the material and cross-sectional area of the core.

Grounding points of core sheets for transformer

(1) Separately set a grounding lead wire for the iron yoke clip. Because if the iron core hits the upper clamp and causes multiple ground faults, the ground current only flows inside the core clamp, and no current flows through the core ground lead, which may cause the staff to mistake the core for failure; After setting, no matter where the iron core hits the clip, it will form a loop through two grounding outer leads, so that the ground current can be detected correctly on the outside.

(2) The core grounding piece is placed in the middle of the cross section of the iron yoke. In this way, no matter where the iron yoke pulls the insulating bolt and where the fault grounding point is, the induced voltage of the loop is only 1/4 of the 匝 voltage, and the ground current is only a few amps at this time, compared with the iron core grounding piece. It is much smaller when placed in other locations.

(3) If it is necessary to place the core grounding piece in other positions due to problems such as inconvenient installation on site, the insulating bolt of the yoke pull strap and the grounding piece should be placed diagonally to prevent large currents from being generated.

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