| 摘要 |
The present invention is related to a method and a device for monitoring insulation faults between a DC bus and earth or a protective metal enclosure. The method is based on the principle of consecutively connecting two different electrical networks to a DC source (1), measuring at least two values (V1', V2'), one related to each network, calculating resistance values (R1, R2) representative of the insulation quality, comparing said values to alarm levels, and taking alarm action, in particular disconnecting the source (1), if these alarm levels are reached. The invention is equally related to a device for performing the method, said device comprising a switch (6). Both conditions 'on' or 'off' correspond to one of the two electrical networks connected to the source (1). <IMAGE> |
