HomeTIP Research Journal Quezon Cityvol. 4 no. 1 (2007)

Elf Magnetic Interference Factors at TIP-QC: Directions for Magnetic Field Mitigation

Ariel H. Magat

Discipline: Electronics , Electrical Engineering



Extremely low-frequency (ELF) or 60 Hz (AC) magnetic fields are naturally emitted by current- carrying electrical conductors and devices. The AC magnetic field strength emitted by electrical circuits is directly proportional to the magnitude of electrical current.


AC magnetic field decreases naturally in intensity as a function of distance (d) from the source. Simply increasing the distance from the source of an area with elevated magnetic field strengths reduces magnetic fields to an acceptable level.


AC magnetic field sources include heavy current-carrying devices such as transmission and distribution power lines, transformers, electric service panels, and conduit or bus bars. Less obvious sources include fluorescent lights, computer and television monitors, and other electronic equipment. Even the wires on the wall are potential sources.


Researchers were made abroad about the low-frequency magnetic interference in high-rise buildings. Left unmitigated, low frequency magnetic interference could potentially render several spaces in a building unusable for technology operation. With this in mind, mitigation technique could be employed throughout the building to lower these fields.