Patent ID: 9709623
Date: 2017-07-18
CPC Classifications: G01R,H01L,H02S,Y02E

Claim:
1. An apparatus for monitoring a photovoltaic system, comprising: an incoupling circuit to couple an AC voltage test signal into the photovoltaic system when coupled thereto, an outcoupling circuit to outcouple a response signal, which is associated with the test signal, from the photovoltaic system, and an evaluation device, which is connected to the outcoupling circuit, to identify events which adversely affect correct operation of the photovoltaic system, wherein the outcoupling circuit comprises a first transformer and a second transformer, each having a respective primary winding, and each having a respective secondary winding which is connected to the evaluation device, wherein the primary windings of the first and second transformers are arranged in different electrical lines, and are between a generator and an inverter of the photovoltaic system.