1 Scope
This part describes a procedure for measuring and evaluating the external mechanical vibration behavior of generating sets at the measuring points stated in this part.
It applies to reciprocating internal combustion (RIC) engine driven a.c. generating sets for fixed and mobile installations with rigid and/or resilient mountings. It is applicable for land and marine use, excluding generating sets used on aircraft or those used to propel land vehicles and locomotives.
For some specific applications (essential hospital supplies, high rise buildings, etc.), supplementary requirements may be necessary. The provisions of this part may be regarded as a basis for such applications.
For generating sets driven by other reciprocating-type prime movers (e.g. sewage gas engines, steam engines), the provisions of this part may be regarded as a basis for such applications.
2 Normative references
The following documents contain provisions which, through reference in this part of GB/T 2820, constitute provisions of this part. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 2820.5-1997 Reciprocating internal combustion engine driven alternating current generating sets - Part 5: Generating sets (eqv ISO 8528-5:1993)
IEC 60034-7:1992 Rotating electrical machines - Part 7: Classification of types of constructions and mounting arrangements (IM Code)
ISO 2041:1990 Vibration and shock - Vocabulary
ISO 5348:1987 Mechanical vibration and shock - Mechanical mounting of accelerometers
3 Definitions
For the purposes of this part, the terms and definitions given in ISO 2041 and the following apply.
vibration severity generic term that designates a value or set of values, such as a maximum value, average value or rms value, or other parameter that is descriptive of the vibration
Note 1: It may refer to median value or root-mean-square value.
Note 2: ISO 2041 includes two notes in the definition. These notes do not apply in this part.
Foreword i
1 Scope
2 Normative references
3 Definitions
4 Symbols and abbreviations
5 Other regulations and additional requirements
6 Measured values
7 Measuring devices
8 Location of measuring points and direction of measurements
9 Operating conditions during measurement of generating sets
10 Evaluation of measurement results
11 Test report
Annex A (Informative) Typical generating set configurations
Annex B (Informative) Remarks on the assessment of vibrations of the generating set
Annex C (Informative) Vibration values
Annex D (Informative) Measuring report
Annex E (Informative) Bibliography
