Simulation calculations may differ from actual because conditions are affected by other components such as oil quality and condition, mechanism response between components. COPPUS Catalog 2019 MODEL/SPECIFICATIONS CP-20 Air- or steam turbine-driven blower/exhauster COPPUS DIMENSIONS TECHNICAL DATA A 80 psig (5, 6 kg/cm2) at large nozzle or 150 psig (10,6 kg/cm2) at small B 60 psig (4, 2 kg/cm2) at large nozzle or 115 psig (8, 1 kg/cm2) at small. In the results of this simulation, the trip condition is a rotation of 11600 Rpm, for 2.11 seconds and an acceleration of 19.84 Rpm / sec. OST works following the equation of the centrifugal force where when the trip speed is exceeded the lever will move out. Acceleration turbine, initial Alpha 40.29 rpm / second. If a stop valve sticks and does not close, no upstream actuation device or logic will stop the turbine. The mechanical portion of the trip system needs to be evaluated to achieve failsafe reliability. Turbine rated speed 10000 rpm, trip speed multiplier 10%, trip speed 11600 rpm according to API 612: 116% rated. It can replace a mechanical overspeed trip mechanism, but it does not provide the final mechanical muscle to shut off the steam. In Shinko RG64 steam turbine testing with Conversion factor, 900kW max net power turbine. In this case, over speed trips were studied using mechanical systems. The graph increases between the speed and time of decreasing the rotational speed.

Speed of rotor is always maintained so as not to more rotation to hinder uncontrolled. Therefore we need a device to control speed of shaft (Overspeed Trip). Many of steam turbines designs in over speed can occur.

Coppus turbine overspeed trip mechanism