Dual trip manifold assembly for turbine systems

An emergency overspeed protection system comprising:

• at least one trip manifold assembly (TMA) comprising a fluid supply header and a trip header coupled in flow communication to said fluid supply header;
• and
• an isolation valve assembly comprising:
• a first valve configured to receive a flow of fluid from a hydraulic system fluid supply, said first valve coupled in flow communication to said fluid supply header;
• and
• a second valve coupled in flow communication to said trip header, said second valve configured to receive the flow of fluid from said trip header,
• wherein said first valve and said second valve are coupled to each other such that closing said first valve with respect to said at least one TMA causes said second valve to close with respect to said at least one TMA, thereby isolating said at least one TMA from the flow of fluid.