This application discloses a bipolar photovoltaic system, a power supply system, and a redundancy protection method. The photovoltaic system at least includes: a first output end, a second output end, and a third output end of a power converter are respect...

The device has phase conductors (L1-L3) which are connected to level converters (PW1,PW2) whose outputs are connected to voltage detection input (A-D) of microcontroller (MC) and input of monitoring module. Microcontroller outputs pulse width modulated sig...

The method involves operating a remote tripping device that has two detectors (1, 2), to receive a signal at the same frequency but for different transmission times. A non-exclusive OR logic link (5) between the two detectors forms an output (6) of the det...