Overspeed Trip Device fundamental , Mechanical and Electrical Overspeed, Steam Turbine, Gas Turbine

There are numerous conditions under which steam turbines are normally protected by various instruments. Here follows a list of the most common threats in response to which a turbine is normally protected, by either alarms or trips.

Overspeed;
Low bearing oil pressure;
High bearing oil inlet temperature;
High thrust or journal bearing drain oil or metal temperature;
High vibration, either of the rotor shaft or the bearing support structures;
High exhaust pressure (condensing exhaust);
High exhaust temperature (condensing exhaust);
Excessive axial movement of the thrust collar within the confines of the thrust bearing (beyond that which would normally be associated with the axial clearance of the collar between the babbit coated thrust faces);
Excessive differential expansion (between shell and rotor);
Rapidly decaying inlet steam pressure;
High turbine inner/outer casing skin temperature differential;
we will explain one by one of all these concepts.
In this video we will explain the overspeed protection only.

• #education
• #power_plant
• #turbine
• #protection
• #steam_turbine
• #gas_turbine
• #overspeed