Patent ID: 9007069
Filing Date: 2015-04-14
Classification: G01R,H02H

Abstract:
1. A method of testing a short circuit protection system applied to a spur of an electric circuit, in which the short circuit protection system comprises a current limiting device comprising a series semiconductor element and a current sense/drive circuit, which current limiting device applies a current limit to said spur if the current thereon exceeds a spur current trip level, in which the electric circuit comprises a power supply and an active monitoring and isolating system which fully or partially isolates the power supply from the electric circuit if the current thereon exceeds a power supply trip level for longer than a deadband period, in which said method comprises the following steps: i) applying a test current demand to said short circuit protection system which has a current and duration sufficient for said spur current trip level to be exceeded, but a current insufficient for said power supply trip level to be exceeded and/or a duration insufficient to exceed said deadband period, ii) detecting if the current limiting device applies said current limit or not during said test current demand.