UNDERGROUND CABLE'S EMF

ACTIVITY ON 23//4/10

STUDY OF POWER FREQUENCY MAGNETIC FIELD FROM UNDERGROUND CABLES

This study conducted by :
(1) EMF Research Group, College of Engineering, UNITEN
(2) Tashia Marie Anthony

- this project purpose is actually to evaluate magnetic field from underground cables.

- Magnetic field from underground cables generally affected by a number of variables including :
i) magnitude of phase current
ii) distance of cables from ground
iii) phase configuration
iv) lateral distance from underground cables

Magnetic Field measurement
- this test was done on existing underground cable system in Putrajaya at the following locations :
--> PPU PJ13 (Alam Warisan)
--> PPU CJ16
--> PMU Cyberjaya North

* PPU PJ13 & PPU CJ16 cable laid in cable ducts. PMU CBJN were direct buried cables

Measuring Equipment

- Simulation Software
--> EMCALC 2000 (UNITEN)
--> CymCAP (TNBR)

- Site measuring equipment
--> EMDEX II meter
--> Linear Data Acquisition (LINDA) wheel

EMDEX II meter

LINDA Wheel

Cable Route

Magnetid field measurement

* EMDEX II records data at a fixed rate, walking slowly with the LINDA wheel will produce more detailed measurements over a short distance, while walking quickly will produce more generalized measurement over longer distance.

* the measurement should be perpendicular to the cable route. (roll the LINDA wheel perpendicularly to the cable route.)