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Comparison between two power-frequency electric-field dosimeters.

T Lindh1, L I Andersson

  • 1National Institute of Occupational Health, Division of Physical Industrial Hygiene, Solna, Sweden.

Scandinavian Journal of Work, Environment & Health
|January 1, 1988
PubMed
Summary
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The BE-log meter accurately measures electrical exposure in switchyards, correlating with short circuit currents. The EFEM meter recorded lower doses, showing a 0.6 ratio compared to the BE-log meter for personnel safety assessments.

Area of Science:

  • Electrical Engineering
  • Occupational Health and Safety

Background:

  • Switchyards involve high voltages (70-400 kV), posing risks to personnel.
  • Accurate measurement of electrical exposure is crucial for worker safety.

Purpose of the Study:

  • To evaluate the performance of two instruments, the EFEM meter and the BE-log meter.
  • To compare their measurements of electrical exposure in switchyard environments.

Main Methods:

  • Field testing of the EFEM meter and BE-log meter on personnel in switchyards.
  • Voltages ranging from 70 kV to 400 kV were assessed.
  • Correlation analysis between instrument readings and short circuit currents.

Main Results:

  • The BE-log meter showed strong correlation with short circuit currents through grounded personnel.

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  • The EFEM meter consistently measured lower doses than the BE-log meter.
  • A consistent ratio of approximately 0.6 was observed between EFEM and BE-log meter readings.

    • Conclusions:

    • The BE-log meter appears reliable for assessing electrical exposure related to short circuit currents.
    • Discrepancies between the EFEM and BE-log meters suggest differences in measurement principles or sensitivity.
    • Further investigation is needed to understand the implications of these differences for occupational safety standards.