1-High exhaust temperature: Vacuum drops or maintains at lower side due to high exhaust steam temperature flow into steam condenser. This high exhaust temperature is mainly due to 1-Operation of Turbine at lower loads 2-More clearance in labyrinth seals 3-Not operating exhaust hood sprays 4-More load on condenser 5-Breaking of ejector U loop 2-Low circulating cooling water flow Vacuum in condenser reduces due to inadequate cooling water flow through steam condenser. This is mainly due to; 1-Problems associated with pumps 2-Air pockets in pipe line 3-Leakages in cooling water line 4-Stuck of discharge valve of pump 3-High cooling water temperature at condenser inlet Higher cooling water temperature at condenser inlet results into reduction of vacuum due to poor heat transfer from steam to water 4-Poor heat transfer in condenser Very less or poor heat transfer in steam condenser reduces vacuum to very low level resulting into high exhaust temperature &am
1-What do you mean by power transformer? It is a static Electro-magnetic machine which transforms alternating current from one AC voltage to another AC voltage at same frequency & at the same apparent power (KVA). 2-What is the principle of Power transformer operation? Power transformers work on the principle of electromagnetic induction. Which states that, EMF induced in a closed conducting circuit when the magnetic flux linking with that circuit changes in time. 3-What is the main function of a power transformer? Generally it is used for stepping up or stepping down of Voltage to desired level 4-What are the various parts of power transformer? General arrangement of Power Transformer Casing Core Primary & secondary windings LV & HV bushings Radiators & cooling system Conservator Breather Protection devices like Buchholz relay, relief valves, temperature sensors 5-Why does the oil conservator is placed at higher elevation? Oil conservator is placed at a slightly hi
