Method and device for assigning individual phase conductors in a polyphase energy distribution network

A method for assigning individual phase conductors at a first point to phase conductors at at least one further point in a polyphase energy distribution network, in a case of mains operation, which comprises the steps of:

• determining a common reference time for points in the polyphase energy distribution network including the first point and the at least one further point;
• determining for the first point, in a case of a four-conductor network, for at least one phase conductor a time difference and/or a phase difference of a phase voltage between a reference time and a time of a zero crossing of the phase voltage, or determining in a case of a three-conductor network, for at least two of the phase conductors the time difference and/or the phase difference of a line-to-line voltage between the reference time and the time of the zero crossing of the line-to-line voltage;
• determining for the further point, in the case of the four-conductor network, for at least one phase conductor, the time difference and/or the phase difference of the phase voltage between the reference time and the time of the zero crossing of the phase voltage, or determining in the case of the three-conductor network, for the least two phase conductors, the time difference and/or the phase difference of line-to-line voltages between the reference time and the time of the zero crossing of the line-to-line voltages;
• comparing the time difference and/or the phase difference at the first point with the time difference and/or the phase difference at the further point;
• and
• assigning a phase conductor of the first point to a phase conductor of the further point having a same time difference and/or a same phase difference in relation to the common reference time.

A device for carrying out a method for assigning individual phase conductors at a first point to phase conductors at at least one further point in a polyphase energy distribution network, the device comprising:

• a signal generator for defining a common reference time;
• a phase measurer disposed at at least two points, with said phase measurer a time of a zero crossing of a phase voltage on at least one phase conductor or a line-to-line voltage of at least two phase conductors can be measured;
• a comparison unit connected to at least one said phase measurer at the points, wherein a time difference or a phase difference between a reference time and the time of the zero crossing can be determined with said phase measurer;
• and
• at least one assignment unit connected with said comparison unit, by comparing time differences or phase differences at two different points, the phase conductor of the first point can be assigned to the phase conductor of a second point which has a same time difference or a same phase difference.