การศึกษาผลกระทบของสนามไฟฟ้าและสนามแม่เหล็กที่มีต่อเครื่องวัดอิเล็กทรอนิกส์ในสถานีไฟฟ้า / ปิยะบุตร พฤกษานุบาล = Study of effects of electric and magnetic field on electronic measuring equipment in substations / Piyabutr Pruksanubal
This thesis reports the surveying measurement of low frequency electric and magnetic fields in substations and under transmission lines. The comparison of measured and calculated values were illustrated. A generation of uniform magnetic field in a laboratory by means of a magnetic coil was described. The inception effects of the electric and magnetic field on electronic measuring equipment were carried out. The means of interference protection or reduction were studied. The protection of magnetic field interference by using shielding box was demonstrated. The experimental results showed that the magnetic field interference can be protected by means of shielding box.