Fault passage indicators (FPI)
Plan de protection des réseaux de distribution publique à moyenne tension

Today's power grids are undergoing many changes to improve their efficiency, both in terms of performance and capacity. This means knowing their status at all times, both in terms of load and faults. Fault detectors, which can locate a faulty network section, are one of the tools increasingly used.

Unlike protection devices that automatically control switching devices such as circuit breakers, the main role of fault detectors or fault indicators is to signal that a fault has occurred downstream of their position. Initially, these devices simply provided a visual indication that a fault had occurred, which meant visiting structures to check their condition. Today, with the development of communications networks, this information is increasingly...