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72.5 kV to 150 kV underground cables

Belongs to:
Underground and sea cables
Description:

110 kV underground cables are primarily used in Germany, Austria or Switzerland whereas 132 kV underground are primarily found in Great Britain. In general, underground calbes transmit energy or information over short distances. In America, Africa or Asia, where the transmissions paths are several hundred km long, 110 kV are not advisable due to their high idle power.

Frequency ranges:
  • 50 Hz
Type of field:
magnetic

Measurements (acc. to literature)

110 kV
Measurand Value Feature Remarks
magnetic flux density 0.026–0.027 µT (mean, measured) Germany at a distance of 20 m and a height of 1 m [1]
magnetic flux density 0.027 µT (maximum, measured) Germany 1 m above ground at an installation depth of 1.2 m and maximum current load [1]
magnetic flux density 0.034–0.051 µT (mean, measured) Germany at a distance of 10 m and a height of 1 m [1]
magnetic flux density 0.036 µT (maximum, measured) Germany at a height of 0.2 m above ground at a distance of 20 m to the route [1]
magnetic flux density 0.04 µT (measured) Germany at a height of 0.1 m above ground and a distance of 1 m; current load: 236 A [1]
magnetic flux density 0.05 µT (measured) Germany at a height of 0.1 m above ground and a distance of 10 m; current load: 69 A [1]
magnetic flux density 0.053 µT (maximum, measured) Germany at a distance of 20 m [1]
magnetic flux density 0.057 µT (maximum, measured) Germany at a height of 0.2 m above ground at a distance of 10 m to the route [1]
magnetic flux density 0.06 µT (measured) Germany maximum value at a height of 1 m; current load: 236 A [1]
magnetic flux density 0.1 µT (measured) Germany at a height of 0.1 m above ground and a distance of 5 m; current load: 69 A [1]
magnetic flux density 0.1 µT (measured) Germany maximum value at a height of 0.1 m above ground; current load: 236 A [1]
magnetic flux density 0.163–0.523 µT (mean, measured) Germany at the lines at a height of 1 m [1]
magnetic flux density 0.94 µT (measured) Germany maximum value at a height of 0.7 m above ground; current load: 116 A [1]
magnetic flux density 1.872 µT (maximum, measured) Germany at a height of 0.2 m above ground over the route [1]
magnetic flux density 10 µT (maximum, measured) Germany 1 m above ground with an installation depth of 1 m and maximum current load [1]
132 kV
Measurand Value Feature Remarks
magnetic flux density 0.09 µT (calculated) Great Britain at a distance of 20 m to the center and a height of 1 m above ground; installation depth: 1 m; spacing between the single cores: 0.3 m [2]
magnetic flux density 0.36 µT (calculated) Great Britain at a distance of 10 to the center and a height of 1 m above ground; installation depth: 1 m; spacing between the single cores: 0.3 m [2]
magnetic flux density 0.47 µT (calculated) Great Britain at a distance of 20 m to the center and a height of 1 m above ground; installation depth of the single-cable: 1 m [2]
magnetic flux density 0.94 µT (calculated) Great Britain at a distance of 10 m to the center and a height of 1 m above ground; installation depth of the single-cable: 1 m [2]
magnetic flux density 1.31 µT (calculated) Great Britain at a distance of 5 m to the center and a height of 1 m above ground; installation depth: 1 m; spacing between the separate cores: 0,3 m [2]
magnetic flux density 1.78 µT (calculated) Great Britain at a distance of 5 m to the center and a height of 1 m above ground; installation depth of the single cable: 1 m [2]
magnetic flux density 5.01 µT (calculated) Great Britain at a height of 1 m above ground at the center; installation depth of the single-cable: 1 m [2]
magnetic flux density 9.62 µT (measured) Great Britain at a height of 1 m above ground at the center; installation depth: 1 m; spacing between seperate cores: 0.3 m [2]

References

  1. Neitzke HP et al. (2010): [Determination and comparison of electric and magnetic field exposures emitted by underground and overhead power lines - project 3608S03011]
  2. National Grid (UK): www.emfs.info - 132 kV underground cables: magnetic field