The aim of the invention is to detect an arc in an assembly for transmitting a direct voltage. This aim is achieved by a communication transformer having a primary winding and a secondary winding, the secondary winding being connected to a transmitting device, which is designed to impress a communication signal onto the secondary winding of the communication transformer, and the primary winding being connected to one of the direct voltage lines in order to feed a communication signal transformed by the communication transformer to one of the direct voltage lines. In order to detect, in the assembly, the arc signal caused by an arc, the secondary winding is connected to an arc detection unit, which is designed to detect an arc signal transformed by the communication transformer.

Techniques for detecting electrical arcing in an electrical system include receiving, by a network device, first voltage or current readings associated with a first site; receiving, by the network device, second voltage or current readings associated with a second site; determining, by the network device, whether an electrical arcing condition is associated with the first site or the second site by comparing the first voltage or current readings with the second voltage or current readings; and performing, by the network device, a remedial operation in response to determining that the electrical arcing condition is associated with the first site.

The present disclosure provides distributed power and fault management systems. In one example embodiment, a single power transmitter is coupled to a plurality of power receiver devices via a low-ohmic connection. Each power receiver device is configured to provide local power, and to communicate power input information with the transmitter. The transmitter is configured to sum the power input of each receiver and compare the sum to an output power to determine fault conditions that may be present in the system.