| 摘要 |
The invention relates to a method for connection one side of an apparatus, connected on the other side to an earthed system, to one of several terminals of a single-phase or polyphase electricity mains, which terminal has the lowest impedance to earth compared with the other terminal or terminals; the invention furthermore relates to a device for carrying out such a method. The method according to the invention is characterized &squf& in that each of the electricity mains terminals is coupled to the earthed system; &squf& in that the current which flows between the electricity mains and the earthed system is detected for each of the terminals; &squf& in that the terminal for which the current is a minimum is detected; &squf& and in that the terminal for which the current is a minimum is connected to the apparatus. The device according to the invention is further characterized by a current detection device (R3/D) which is connected, on the one side, to one or more electricity mains terminals and which is connected, on the other side, to the earthed system, and moreover by a selection device (S) which can be controlled by the current detection device and which is connected, on the one side, to the said apparatus (T) and, on the other side, to the electricity mains terminals, which selection device connects, under the control of the current detection device, that electricity mains terminal, to the apparatus, for which the detected current is a minimum.
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