System and device for over-speed protection of a turbo-machine

A trip manifold device for evacuating fluid from a header coupled to a turbo-machine, said trip manifold device comprising:

• a pilot housing;
• a pair of solenoid valves coupled to the pilot housing;
• an actuator element configured to allow fluid to flow through the pair of solenoid valves in response to a signal indicative of an over-speed condition in the turbo-machine;
• a drain housing in flow connection with the pilot housing, the drain housing comprising an actuator with a first position to prevent fluid flow from a first inlet/outlet of the drain housing to a second inlet/outlet of the drain housing and a second position to permit fluid flow from the first inlet/outlet to the second inlet outlet;
• a pilot fluid supply configured to direct fluid to the pilot housing and the drain housing, the pilot fluid supply comprising a pilot isolation valve;
• and
• a main fluid header configured to direct fluid to the drain housing, the main fluid header comprising a main isolation valve;
• wherein the actuator is configured to change from the first position to the second position in response to fluid flow across both of the solenoid valves, and
• wherein the actuator is configured to change from the first position to the second position to deactivate the turbo-machine to prevent damage to the turbo-machine.

A protection system for over-speed protection in a turbo-machine, said system comprising:

• a fluid circuit comprising:
• a header:
• a drain;
• and
• a hydraulic circuit coupling the header to the drain, the hydraulic circuit comprising:
• a trip manifold device comprising a pilot element, an actuator element coupled to the pilot element, and a drain valve element, each of the pilot element and the drain valve element coupled to the drain;
• a main fluid header configured to direct fluid to the drain valve element, the main fluid header comprising a main isolation valve;
• and
• a pilot fluid supply configured to direct fluid to the pilot element and the drain valve element, the pilot fluid supply comprising a pilot isolation valve;
• wherein the actuator element is configured to transition the pilot element from a first state in which fluid is prevented from flowing from the pilot supply line through the pilot element to the drain to a second state that permits fluid flow through the pilot element to the drain,
• wherein when the pilot element is caused to transition from the first state to the second state to permit fluid flow, pressure at the drain valve element is caused to decrease in response to fluid flow from the pilot fluid supply through the pilot element to the drain, and
• wherein, in response to reduction of the pressure at the drain valve element, the drain valve element is caused to transition from a first state in which fluid is prevented from flowing from the main fluid header through the drain valve element to the drain to a second state that permits fluid flow from the main fluid header to the drain.