METHOD FOR CHECKING A SEPARATION POINT BETWEEN A PHOTOVOLTAIC INVERTER AND POWER SUPPLY NETWORK AND PHOTOVOLTAIC INVERTER

摘要

The invention relates to a method for checking a separation point (14) between a photovoltaic inverter (1) and a power supply network (7) having multiple phases (L1, L2, L3) and a neutral conductor (N), wherein multiple switching contacts of the separation point (14) are controlled by the photovoltaic inverter (1), and to a photovoltaic inverter (1). To allow a simple and quick check of the functionality of the separation point (14), the switching contacts of the separation point (14) are each formed by single-pole relays (15-22) and switched in steps according to a switching pattern. For checking switching contacts, a voltage (26, 27, 28) is measured at at least one phase (L1, L2, L3) with respect to the neutral conductor (N), upstream of the separation point (14), and compared to voltage values assigned in accordance with the switching pattern, thereby to deduce the functionality of the switching contacts.

主权项

1. A method for checking a separation point (14) between a photovoltaic inverter (1) and a power supply network (7) having a plurality of phases (L1, L2, L3) and a neutral conductor (N), wherein a plurality of switching contacts of the separation point (14) are controlled by the photovoltaic inverter (1), wherein the switching contacts of the separation point (14) are each formed by respective single-pole relays (15-22) and switched in steps according to a switching pattern, and a voltage (26, 27, 28) is measured at at least one phase (L1, L2, L3) with respect to the neutral conductor (N), upstream of the separation point (14), for checking several switching contacts, and compared to values of the voltage assigned in accordance with the switching pattern from which the functionality of the switching contacts is deduced.