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Cable car

Belongs to:
Rail vehicle
Synonyms:
Streetcar, Tram, Tramway, Trolley
Description:

Cable cars are rail vehicles for the transportation of passengers in public short-distance traffic. Cable cars are generally driven electrically; the power supply takes place either via overhead rail tracks or the third rail. Sources of magnetic fields at the front part of wagon are the compressor of air, DC motors and choppers, at the middle part the pantograph and at the rear part the battery and the inverter.

The measured values which are provided here refer to magnetic fields caused by the overhead rail tracks when a cable car is passing by. The measurements took place either on board or at different locations near the railtracks. Measured values of magnetic fields caused solely by the overhead rail tracks without a cable car passing by can be found separately under overhead rail tracks.

Frequency ranges:
  • 0 Hz (constant field)
  • 180–300 Hz (control frequencies)
Type of field:
magnetic

Measurements (acc. to literature)

Great Britain
Measurand Value Feature Remarks
magnetic flux density 16–64 µT (measured) static field at table height [1]
magnetic flux density 1 mT (measured) static field at floor level [1]
magnetic flux density 0.001–7.6 µT (measured) static magnetic field on the middle floor (750 V) [2]
magnetic flux density 0.01–1.1 µT (measured) static magnetic fieöd on the middle seats (750 V) [2]
magnetic flux density 0.01–1.4 µT (measured) static magnetic field at the rear floor (750 V) [2]
magnetic flux density 0.01–1.7 µT (measured) static magnetic field on the rear seats (750 V) [2]
magnetic flux density 0.01–5.5 µT (measured) static magnetic field on the front floor (750 V) [2]
magnetic flux density 0.02–0.94 µT (measured) static magnetic field at the front seats (750 V) [2]
magnetic flux density 0.02–1.85 µT (measured) static magnetic field at the pantrograph (750 V) [2]
magnetic flux density 1 mT (maximum, measured) 100 HZ on the floor
Australia
Measurand Value Feature Remarks
magnetic flux density 1.4–7.6 µT (maximum, measured) - on the floor [2]
Poland
Measurand Value Feature Remarks
magnetic flux density 1.7–5.2 µT (measured) 5 Hz - 32 kHz measured on board of a metro for a duration of 30 min (visit of 18 stations) [3]
Germany
Measurand Value Feature Remarks
magnetic flux density 50–110 µT (maximum, measured) 16,7 Hz 1 m from the platform edge (750 V) [4]
magnetic flux density 150–350 µT (maximum, measured) 16,7 Hz inside the vehicle (750 V) [4]
Switzerland
Measurand Value Feature Remarks
electric field strength ≤ 0.03 kV/m (maximum, measured) static magnetic field 5 m besides the rail track [5]

References

  1. Chadwick P et al. (1998): Magnetic fields on British trains.
  2. Halgamuge MN et al. (2010): Measurement and analysis of electromagnetic fields from trams, trains and hybrid cars.
  3. Gryz K et al. (2009): Magnetic field related to transient currents of electric transportation systems- Assessment of human's exposure in metro cars.
  4. Hoffmann M et al. (2020): [Electromagnetic fields in everydays life. Latest information on sources, applications and effects].
  5. Moser M et al. (2006): [Non-ionizing radiation and health protection in Switzerland: basic information].