Testing method for a high-voltage circuit breaker equipped with an injection circuit

Abstract

The invention relates to a method for testing a high-voltage current-injection circuit breaker (1) comprising several current-injection switch modules (3) connected in series, including a main branch (31) equipped with an electrical breaking element (32) through which a high-voltage current flows, and including a switching branch (33) configured to selectively inject a current into the main branch (31) so as to cancel the current in this main branch, the method comprising the steps of: -while maintaining the electrical breaking element (32) of a module in its conducting state, activating the switching branch (33) of this module to inject a current into the main branch of this module; -determining electrical parameters in the module during said activation; -by comparing the electrical parameters determined with reference electrical parameters, determining whether the circuit breaker (1) is faulty.Figure to be published with the abbreviation: Fig. 1.