appendix

Application Manual -- Liquid Cooled Generator Sets
APPENDIX H
List of Figures
Figure 2--1. Typical One-Line Diagram of an Electrical Distribution System ..... 2--5
Figure 2--2. Standby Power Rating. ....................................... 2--7
Figure 2--3. Unlimited Running Time Prime Power .......................... 2--7
Figure 2--4. Limited Running Time Prime Power ............................ 2--8
Figure 2--5. Base Load Power ............................................ 2--8
Figure 3--1. Voltage Dip in Medical Imaging Applications ..................... 3--13
Figure 4--1. Four-Pole Generator Cross Section ............................ 4--5
Figure 4--2. Self-Excited Generator ....................................... 4--6
Figure 4--3. Separately-Excited (PMG) Generator ........................... 4--6
Figure 4--4. Typical Voltage Profile on Load Application and Removal .......... 4--7
Figure 4--5. Typical Generator Saturation Curves ........................... 4--8
Figure 4--6. Excitation System Response Characteristics .................... 4--8
Figure 4--7. Transient Voltage Dip ........................................ 4--10
Figure 4--8. Typical Across-the-Line Motor Starting Characteristics
(Assumes 100% of Nominal Voltage at Motor Terminals) .......... 4--11
Figure 4--9. Sustained Voltage Dip ........................................ 4--12
Figure 4--10. Typical NEMA Generator Chart of Transient Voltage Dip vs. Motor
Starting KVA ................................................ 4--12
Figure 4--11. Symmetrical Three-Phase Short Circuit Response ............... 4--13
Figure 4--12. Short Circuit Capability ....................................... 4--13
Figure 4--13. Approximate Short Circuit Winding Temperatures ................ 4--14
Figure 4--14. Typical Electric Starter Motor Connections (24 Volt System
Shown) ..................................................... 4--16
Figure 4--15. Resistance vs. Length for Various AWG Cable Sizes ............. 4--17
Figure 4--16. Typical Piping Arrangement for an Air Starter .................... 4--18
Figure 4--17. Two--Wire Control Interface Panel .............................. 4--19
Figure 4--18. Detector 12t Control Interface
Panel ...................................................... 4--19
Figure 4--19. Power Command Microprocessor System ....................... 4--20
Figure 4--20. Power Command Full Authority Electronic ..................... 4--20
Figure 4--21. Water Jacket Heater Installation. Note Heater Isolation Valve,
Hose Type, and Hose Routing. ................................ 4--27
Figure 5--1. Generator Set Serving Common Loads ......................... 5--5
Figure 5--2. Multiple Generator Sets Serving Common Loads ................. 5--6
Figure 5--3. Single Generator Set Standby Applications ...................... 5--7
Figure 5--4. Multiple Generator Sets, Multiple ATS Applications ............... 5--8
Figure 5--5. Simple MV/HV Generator System For Prime Power .............. 5--9
Figure 5--6. HV/MV Scheme For Multiple Generators / Utility Supplies
And Loads .................................................. 5--10
Figure 5--7. Low Voltage Generator For MV/HV Application .................. 5--11
Figure 5--8. Parallel Generators .......................................... 5--17
Figure 5--9. Sample HV/MV/LV Distribution System ......................... 5--22
Figure 5--10. Typical Generator Set Control and Accessory Wiring ............. 5--25
Figure 5--11. Feeder Ampacity ............................................ 5--26
Figure 5--12. Allowable Unbalanced Single-Phase Load (Typical Three--Phase
Generator From Cummins Power Generation) ................... 5--29
Figure 5--13. Typical Steady State Alternator Reactive Power Capability
Curve ...................................................... 5--31
H--2 APPENDIX H
Rev. Jan 2011