IEEE C37.06-2009 pdf free

IEEE C37.06-2009 pdf free.IEEE Standard for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis- Preferred Ratings and Related Required Capabilities for Voltages Above 1 000 V.
IEEE C37.06 applies to all indoor and outdoor types of ac high-voltage circuit breakers rated above 1000 V and rated on a symmetrical current basis.
Inconsistency in application of preferred ratings of high-voltage circuit breakers may result in wrong application of interrupting current and voltage levels.
The recommendations outlined in the following clauses are intended to provide consistent functionality for high-voltage circuit breakers rated above I 000 V.
This standard provides preferred ratings for circuit breakers. IEEE Std C37.04TMl999,
IEEE Std C37.O4aTM2003, and IEEE Std C37.O4bTM2O08 contain the rating structure for circuit breakers.’
IEEE Std C37.O9TM-1999 and IEEE Std C37.O9aTM-2005 [and IEEE PC37.O9bTM-2008 (Draft 3, September
2009) when published] contain the test requirements to support the ratings.
Although this standard identifies preferred ratings. there are instances where a user must make a selection from several preferred or alternate ratings.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, oniy the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
For service conditions, definitions, interpretation of ratings, tests, and qualifying terms, see IEEE Sid C37.04-1999. IEEE Std C37.04a-2003 (Amendment I), IEEE Std C37.09-1999 and IEEE Sid C37M9a-2005, and IEEE Std C37.01 1-2005. Reference should be made to ANSI C37.06.1 [BI] for ratings of circuit breakers in special applications with fast TRV requirements calling for definite purpose circuit breakers with special TRV requirements and for circuit breakers in transformer limited fault applications.t’ For other information not listed in these tables refer to the following:
a) Abbreviations used in the tables: RRRV = rate of rise of recovery voltage, TRV = transient recovery voltage.
b) Voltage range factor K was defined in IEEE Std C37.04-1979 and is no longer defined. It is no longer part of the rating structure for high-voltage circuit breakers. In IEEE Std C37.04-1999, IEEE SW C37.09-1999. and ANSI C37.06-2000. the voltage range factor was effectively eliminated as it was changed to 1 .0. For ratings of circuit breakers with voltage range factor K greater than 1.0, refer to ANSI C37.06-1987, and to the earlier versions of the relevant standards (e.g., IEEE C37.04-1979, IEEE Std C37.09-1979, ANSI C37.06-1987, IEEE Std C37.010-1979).
c) The preferred ratings are for 50 lIz and 60 Hz systems. For applications at other system frequencies refer to IEEE Std C37.010-2005 for special considerations. The rated interrupting times and peak recovery voltage values and times given are all based on 60 Hz systems.
d) The maximum permissible tripping time delay Y is 2 s or I s according to the voltage class.
e) Short line fault in the text of this standard means single line-to-ground short-line fault. No references arc made to the multi-line phase-to-phase short-line fault. Some three-phase line faults are not be covered in this standard. For discussion on this subject see IEEE Std C37.0I 1-2005,
4.2.4.
f) All tables show “prospective” or “inherent” characteristics of the currents andJor voltages. Here prospective values are used in conformance with international standard. The word ‘inherent” was used in many previous IEEE publications. These words have the same meaning in this standard. They indicate, for example. that the TRV in this standard is that given by the system. The circuit breakers, during interruption of the short circuit current, modify the TRV and the modified values are read on oscillographs during interruption.IEEE C37.06 pdf download.