Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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The Measurement of Electromagnetic Wave in Power Cable Tunnel of Underground Utility Tunnel

전력구 내 전자기파에 대한 작업 환경 측정

  • Kang, Dae Kon (Sejong Special Self-governing City Facilities Management Corporation) ;
  • Park, Jai Hak (Department of Safety Engineering, Chungbuk National University)
  • Received : 2018.10.25
  • Accepted : 2018.12.03
  • Published : 2019.02.28
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Abstract

Electromagnetic measurements of the power cable tunnel were conducted from August 10 to 20, 2018, in the ${\bigcirc}{\bigcirc}$ city underground utility tunnel. During this period, the average temperature was $31.89^{\circ}C$ and the humidity was 67.56% in power cable tunnel. As a result of the electromagnetic measurement, the highest electric field was 25.3 V/m and the magnetic flux density was $42.6{\mu}T$. The average electric field was 18.56 V/m and the magnetic flux density was $29.32{\mu}T$ in the power cable tunnel. As a result of comparison with the electric equipment technical standard, the electric field in the power cable tunnel was 0.5% of the electric equipment standard and 35.2% of the magnetic flux density. It's similar value that electric field is about robotic vacuum(15.53 V/m), and magnetic flux density is similar value about capsule- type coffee machine ($23.07{\mu}T$). The number of cable lines and the size of the electromagnetic waves were not proportional to each other through comparison of cable lines in the power cable tunnel. It was confirmed that 154 kV, rather than 22.9 kV, could have a greater influence on occupational.

Keywords

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Fig. 1. Section of underground utility tunnel.

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Fig. 2. Cable arrangement in the power cable tunnel.

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Fig. 3. Measuring of electric and magnetic fields.

Table 1. Total cable coupled numbers

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Table 2. Standard of electric and magnetic field for general public & occupational12)

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Table 3. ICNIRP guide line for general public & occupational occupation15)

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Table 4. Interim guidelines for general public & occupational occupation17)

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Table 5. Electric magnetic field strength and magnetic flux density measurement results of household appliance

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Table 6. Measuring electric field and magnetic flux density in power cable tunnel.

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