Earth connection detection method for multi-phase supply network e.g. for polysilicon production plant, compares phase angle of current or voltage at transformer star node with phase angle of supply current or voltage phases

摘要

The method involves obtaining the phase angle of the current or voltage at a transformer star connection node compared with the phase angle of the current or voltage for the individual phases of the energy supply network, when a threshold value for the current or voltage at the transformer star node is exceeded.