IEEE Std 242-2001. (Revision of IEEE Std 242-1986). IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems. Buff Book

Institute of Electrical and Electronics Engineers, Inc., 2001 —750 p.
IEEE Std 242-2001, IEEE Buff Book deals with the proper selection, application, and coordination of the components that constitute system protection for industrial plants and commercial buildings. System protection and coordination serve to minimize damage to a system and its components in order to limit the extent and duration of any service interruption occurring on any portion of the system.
A valuable, comprehensive sourcebook for use at the system design stage as well as in modifying existing operations, the IEEE Buff Book
is arranged in a convenient step-by-step format. It presents complete information on protection and coordination principles designed to protect industrial and commercial power systems against any abnormalities that could reasonably be expected to occur in the course of system operation.
Design features are provided for
— Quick isolation of the affected portion of the system while maintaining normal operation elsewhere
— Reduction of the short-circuit current to minimize damage to the system, its components, and the utilization equipment it supplies
— Provision of alternate circuits, automatic throwovers, and automatic reclosing devices.