| 摘要 |
<p>A method and device for measuring electrical quantities, at least voltage and current, preferably also power, in three-phase systems wherein the phase voltages and phase currents in the phase lines of a three-phase system are sensed by voltage and current sensors connected to the phase lines. Corresponding voltage and current signals are evaluated by a processor to form measurement data that are displayed on a display. Relative phase positions of the voltage signals and the current signals are compared with a given phase sequence and therefrom a correctness or incorrectness of the connections of the voltage and current sensors to the phase lines is determined, and corresponding display signals are output to the display. In response to determining that one or more voltage or current sensors are incorrectly connected to the phase lines, an automatic and electronic correction comprising inversion and/or exchange of the measurement data may be provided.</p> |
