121 Mount Vernon St., Boston, MA 02108, USA
Phone: +1617 242 2204 Fax: +1617 242 2205
4.8 Technical Data for Generator
Guaranteed generator output and efficiency (at 0.9 power factor and 40°C ambient) (with turbine operating under _19.9
foot net head).
Generator Output (KW) Generator Efficiency
100% Load 1,080.7 95.9
75% Load 839.3 95.7
50% Load 556.5 95.1
25% Load 312.7 92.5
Guaranteed generator efficiencies shall account for all losses; including but not limited to, bearing, windage, I2R, excitation
and miscellaneous electrical losses.
4.9 Guaranteed Generator Reactances
Direct Axis Subtransient Xd" 0.2 OHMS
Direct Axis Transient Xd'_0.24 OHMS
Direct Axis Synchronous Xd 1.34 OHMS
Negative Sequency Reactance Xd2_0.3 OHMS
Zero Sequency Reactance Xdo 0.01 OHMS
Open Circuit Transient Time Constant T’do 1.28
Calculated Resistance of Field Winding at 25°C 1.46 0 - Main 180 exciter
Max Rated Exciter (dc) Volts 120 Volts
Max Rated Exciter AMPS _6A
Guaranteed Short Circuit Ratio, not less than 0.74
Residual T.I.F., not greater than _BD
Deviation of Waveform, plus or minus 3%
Voltage Regulator Stability +0.5% at 40 °C
Rated Generator Speed 720 RPM
Vendor Shall Submit the Following Generator Performance Curves
(A) No Load Open Circuit Saturation Curve CURVE # TBD
(B) Synchronous Impedance Curve CURVE # TBD
(C) Reactive Capability Curve* CURVE # TBD
(D) Vee Curves CURVE # _TBD
*The reactive capability curves shall define generator limits as a function of ambient temperature.
Project No. 0-29029.Rev.3 www.mavel.com Jackson Mills Upgrade
