IEEE C37.06-2009 pdf free download – 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.
3. General applications to circuit breakers ‘or service conditions, definitions, interpretation of ratings, tests， and qualifying terms, see IEEE Sid C3704-1999，IEEE Sid C37.048-2003 (Amendment 1)。 IEEE Sid C3709-199 IEEE Std C37.09a-2005, and IEEE Std C37.01 1-2005. Reference should be made to ANSI C37.06.1 [B1] for ratings of cireuit breakers in special applications with fast TRV requirements ealling for definite purpose circuit breakers with special TRV requirements and for circuit breakers in transformer limited fault applications.” For other information not listed in these tables refer to the following:
a) Abrevitions used in the tabls: RRRV – rate of rise of recovery voltage. TRV – transient recovery voltuge.
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 volage circuit breakers. In IEEE Sud C37.04- 999, IEEE Std C37.09-1999, and ANSI C37.06-2000, the voltage range factor was eftively eliminated a it was changed to 1.0. For ratings of circuit breakers with volage range factor K greater than 1.0, refer to ANSI C37.06-1987. and to the earlier versions of the relevant standards (eg, IEEE C37.04-1979, IEEE Std C37.09-1979, ANSI C37.06- 1987, IEEE Std C37.010-1979). 🙂 The preferred ralings are for 50 Hz and 60 Hz systems. For appliations a other system frequencies refer to IEEE Std C37.010-2005 for special considerations. The rated interupting times and peak recovery voltage values and times given are all based on 60 Hz systems.
c ) The maximum prmissible tipping time delay Y is 2s or 1 s according to the volage class .
e) Short line fault in the text of this standard means single line-to- ground shor-/ine fault. No rferences are made 1to the muliline phase 4o-phase short-line ful. Some threephase line fauls are not be covered in this standard. For discussion on this subject se IEEE Std C37011-2005, 4.2.4.
f) All tables show“prospective” or“inberent” churacteristics of the currents and/or voluges. Here prospective values are used in conformance with intermational standard. The word “inhent” 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 curent, modify the TRV and the mdifed values are read on oscillographs during iteruption. Current values have genrally been rounded to the nearest kiloampere (kA) except that two significant figures are used for values below 10 kA.
4. Basic definitions applied in this standard Definitions applicable to this standard are contained in IEEE Sud C37.04-1999, IEEE Std C37.04a-2003, IEEE Sld C37.04b-2008, IEEE Sld C37.09-1999, IEEE Sud C37.09-2005, IEEE PC37.09b (Draft 3, September 2009)， The IEEE Standands Dictionary: Glossary of Terms & Definitions, IEEE Std C37.100- 1992, and IEEE Std C37.100.1 -2007, and are not repeated in this document.” Annex A and Anmex B recall these definitions as used in this standard and is tables.IEEE C37.06 pdf download.