"Subclassing and Composition – A Pythonic Tour of Trade-Offs", Hynek Schlawack
Fire Pump Motor Starting
1. Induction Motors: Parameters & Starting By: James S. Nasby -- Columbia Engineering
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6. Motor Starting Region – cont’d Motor Torque Curve Motor Torque and Pump Torque Curves
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10. NEMA Design Types Standard Three Phase Induction Motors are NEMA Design “B” ( Rated Full Load Torque) Rated | Speed (RPM)
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13. Motor Parameters – cont’d Motor Current Curve Motor Current -vs- RPM Curves Rated Running Current = 100%
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15. Induction Motor Locked Rotor Codes Note: Controllers (15 Hp and higher rated ) are NOT rated, tested, approved, or listed for starting codes above Code "G".
47. Motor Starting – cont’d Wye-Delta Open Transition LPM Module = Leading Phase Monitor ®
48. First Half Cycle Offset Waveforms 2.83 x LRA = 6 x 2.83 x FLA = 17.0 x FLA Maximum Theortical This curve shows starting a motor which still has BACK EMF (voltage) present.