IEEE C37.101-2006 pdf free.IEEE Guide for Generator Ground Protection.
The guide is intended to assist protection engineers in applying relays and relaying schemes for protection against stator ground faults on various generator grounding schemes. The existing guide is outdated due to rapid technology development. Hence, the revised guide includes new stator ground protection principles that have evolved with the use of new technologies in relay designs. Additional application examples are included, and other issues raised by the users are also addressed. The guide is not intended for the selection of generator or ground connection schemes.
The recommendations made pertain to typical generator installations. However, sufficient background information relating to protection requirements. applications, and setting philosophy is given to enable the reader to evaluate the need to select and apply suitable protection for most situations.
1.2 Purpose
The guide was prepared, in part. to cover new areas due to rapid technology development. The working group has made revision and expansion of the earlier version to include those areas.
In addition, the protective function discussed in this guide may be implemented with a multifunction microprocessor-based protection system (digital system). The protection philosophy, practices, and limits are essentially identical to those of the implementation using discrete component relays. The algorithms used to perform some of the protection functions may be different, but should produce equal or better protection. However, the performance and capability of the digital systems may be superior due to improved frequency response (bandwidth) and thresholds (pickup settings). Other additional features may he available from these systems, like digital fault recording, that enhance the functionality. The improved frequency response and multiple settings groups may be beneficial, especially for start-up protection where older relays needed to be blocked from operation and additional dedicated start-up protective relays arc traditionally applied. The start-up relays may not be required with the use of the microprocessor-based protection.IEEE C37.101 pdf download.