Device and a method for protecting a link in a medium, high, or very high voltage electrical network

摘要

A device and method of protecting a link in a medium, high, or very high voltage power network, with current and voltage transformers and trip circuits being disposed on the link. The protection device includes a mechanism to directly connect to a power supply, to the current and voltage transformers, and to the trip circuits, via analog links, and a mechanism to convert from analog to digital that is connected to a central processor unit via a digital link, the analog-digital conversion mechanism including an integrated test plug socket function.

主权项

1. A device for detecting a fault in a medium, high, or very high voltage electrical network, including at least one medium, high, or very high voltage link, the device comprising:
connection means for direct connection to a power supply, to current and voltage transformers, and to trip circuits disposed on the link, via analog links; means for continuously measuring current and voltage delivered by the current and voltage transformers; analog to digital conversion means connected to a central processor unit, via a digital link, which central processor unit monitors the current and voltage delivered by the current and voltage transformers; means for controlling the trip circuits; means for testing operation by injecting current and voltage; a base part including a direct connection via analog links to supply voltage, to the current and voltage transformers, and to the trip circuits; an active part, for performing the analog to digital conversion, including at least one socket and being adapted to be inserted in the base part; and a test part for enabling current and voltage to be injected and configured to be inserted in a socket of the active part.