Recommended practice for emergency power systems in health care facilities
Chapter V of the White Book deals with the requirements and equipment which are recommended for health care facility emergency power systems and their operation. Suggested methods for system design, installation, testing, and maintenance are included. The main components of the emergency power system are the generator sets, automatic transfer switches, engine generator controls, engine cranking batteries, and battery charger. Additional equipment may include synchronizing and paralleling equipment for multigenerator set installations, utility peak demand reduction controls, elevator emergency power selector systems, and bypass-isolation switches for automatic transfer switches.
An analytical look at standby diesel engine/generator loading
Diesel engine/generators are complex systems which utilize different governors, voltage regulators, excitation systems, excitation support systems, and turbochargers. Even the engine and the generator have widely varying characteristics and ratings and are often matched differently for different applications. In sizing and specifying these units, the engineer should use `rules of thumb' cautiously. As many known factors as possible should be applied to the sizing and specifying process. In the future, the computer will probably be used routinely to predict diesel engine/generator response to dynamic loads.
Evaluating the Effects of Motor Starting on Industrial and Commercial Power Systems
The motors being applied on modern industrial systems are becoming increasingly large in size. Starting these large motors, especially across-the-line, will produce a transient voltage depression that can substantially reduce the motor output torque while severely influencing the operation of any locally connected load, as well as loads served by buses electrically remote from the point of motor starting. Motors with special starting characteristics and reduced voltage starting equipment may reduce motor inrush and the associated voltage dip, but the starting performance of the motor may be unacceptably altered. How computer aided studies are of benefit in exploring the problems associated with starting large motors on industrial systems is discussed. Several types of studies that are presently available are described, and the data or information required to perform these studies are reviewed. Finally the results that can be expected from a motor starting study effort are examined.