Patent ID: 8925329
Filing Date: 2015-01-06
Classification: F01D,F05D

Abstract:
1. A method of testing a system for protecting a turbomachine against overspeed during starting of the turbomachine, the protection system including a fuel cutoff member and a circuit for controlling the cutoff member that is connected to an electronic regulation system of the engine to cause the cutoff member to close to interrupt or reduce the supply of fuel to a combustion chamber of the turbomachine in response to overspeed being detected, the method comprising the following test sequence: a) on receiving an order to start the turbomachine, the electronic regulation system sending an order to the control circuit of the cutoff member to close the cutoff member or to keep the cutoff member in the closed position; b) the electronic regulation verifying the closure state of the cutoff member on the basis of information received representative of the open or closed position of the cutoff member; c) when the result of the verification in step b) is positive, the electronic regulation system sending an order to the control circuit of the cutoff member to authorize opening of the cutoff member and continue with the procedure for starting the turbomachine; and d) when the result of the verification in step b) is negative, the electronic regulation system issuing a fault signal relating to the overspeed protection system.