| 摘要 |
Safety actuator release device incorporating a release means, whereof one output supplies an output signal which can have two logic states, one of these states corresponding to the release of the actuator and the other state corresponding to the absence of the release of the actuator, testing and control means of said release means, whereby said testing and control means have two control inputs receiving the control signals from the release means in order that the output signal has one of two logic states and a test input receiving a test signal in such a way that said output supplies an output signal, whose logic state corresponds to the release of the actuator, even if the control signals lead to the supply of an output signal corresponding to the absence of release, wherein the testing and control means are constituted by three primary windings of a magnetic amplifier, two of these primary windings receiving direct currents corresponding to the control signals, while another of these windings is a test winding receiving a direct current corresponding to the test signal, the release means being constituted by a secondary winding of the magnetic amplifier, said secondary winding beign connected to an alternating current supply, the actuator being connected to this winding via a bridge rectifier. Application to the protection of nuclear reactors. |
