| 摘要 |
<p>Method and apparatus (1) for the monitoring of electricity that is being transmitted via one or more high voltage lines (19), where the magnetic field from at least one of the high voltage lines (19) is measured as a function of the current that is being transmitted by the high voltage line(s). It is used to measure the magnetic field generated by the high voltage line current and the direction of the current in the high voltage line, same measurement supplied by a single sensor coil device (2) located in the magnetic field, where a 180° phase change in the measured value at a measurement point in relation to an expected phase in the measured value at the abovementioned measurement point causes the signalling (21) of a change in current direction in the high voltage conductor being measured, and information concerning current strength and current direction in the high voltage conductor (19) is transferred to an external central data processing unit (22).</p> |
