IEEE C50.12-2005 pdf free

IEEE C50.12-2005 pdf free.IE EE Standard for Salient- Pole 50 Hz and 60 Hz Synchronous Generators and Generator/Motors for Hydraulic Turbine Applications Rated 5 MVA and Above.
3.2 indirectly cooled windings: Indirectly cooled siator windings or rotor windings arc those in which the heat generated within the principal portion of the windings must flow through the major ground insulation before reaching the cooling medium.
Coolant types
3.3 primary coolant: A medium, liquid or gas. that, being at a lower temperature than a part of a machine and in contact with it. removes heat from that part. For open ventilated air-cooled synchronous machines. the primary coolant is the air entering the machine, For closed circuit cooled synchronous machines. the primary coolant is the air or water enrenng the machine from the coolers.
3.4 secondary coolant: A medium, liquid or gas, that, being at a lower temperature than the primary coolant, removes heat given up by the primary coolant by means of a heat exchanger or through the external surface of the machine.
General
3.5 rated voltage, I’ll: Rated voltage is line-to-line rms voltage as stated on the nameplate.
4. Operational requirements
4.1 Service conditions and steady-state duty
Salient-pole open ventilated OV) air-cooled synchronous generators and generator/motors shall operate successfully when and where the temperature of the cooling air is between 10 °C and 40 °C, and the altitude does not exceed 1000 In.
Salient-pole totally enclosed water to air cooled (TEWAC) including direct-cooled synchronous generators and generator/motors shall operate successfully when and where the secondary coolant temperature at the inlet to the machine or heat exchanger is between 5 °C and 35 °C.
4.1.1 Generators
Generators shall operate successfully at rated MVA. frequency, power factor, and terminal voltage. Generators may operate at other service conditions specified in Clause 4 but not necessarily in accordance with the standards of performance established at rated conditions.IEEE C50.12 pdf free download.