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Failure Analysis of Electrical Equipment under Operational Vibration


Affiliations
1 Joint Director, Central Power Research Institute, Bengaluru – 560080, Karnataka, India
2 Engineering Officer, Central Power Research Institute, Bengaluru – 560080, Karnataka, India
3 Engineering Assistant, Central Power Research Institute, Bengaluru – 560080, Karnataka, India
     

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Equipment is subjected to vibration due to operating environment, transportation, handling and earthquake. Vibration results in dynamic loading, wherein failure of equipment depends on magnitude and frequency content of vibration. Equipment should perform its desired function during and/or after the vibration. The need to understand the effects of vibration and shock on equipment reliability is paramount. Vibration qualification is performed to determine if a product can withstand the rigors of its intended use environment, to ensure the final design will not fall apart during shipping, for environmental stress screening to weed out production defects, or even as a form of accelerated stress testing. Vibration tests are commonly used to improve the reliability of instruments, sub components and equipment or a system. Earthquake is the natural disaster which results in three-dimensional ground vibrations. Failure analysis of electrical equipment subjected to operational vibration environment is presented in this paper.

Keywords

Damping, Resonance Frequency, Vibration
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  • IEC 61373: 2010. Railway applications - Rolling stock equipment - Shock and vibration tests.

  • IS 1893 (Part 1): 2016 - Criteria for Earthquake Resistant Design of Structures.

  • IEC 60068 -2- 6: 2007. Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal).

  • IEC 60068 -2 -64: 2008. Environmental testing - Part 2 -64: Tests - Test Fh: Vibration, broadband random and guidance.

  • Manjunath KB, Babu RR, Srinivasamurthy V, Hegde P, Selvam RP. Seismic and vibration qualification of equipment. Second International Conference on Vibration Engineering and Technology of Machinery; 2002.

  • Jayahari L, Praveen G. Correlation of sinusoidal sweep test to field random vibrations. Department of Mechanical Engineering - Blekinge Institute of Technology, Sweden; 2005.

  • IEC 60068-3-8:2003. Environmental testing - Part 3-8: Supporting documentation and guidance - Selecting amongst vibration tests.

  • IEC 60068 -2 -57:2013. Environmental testing - Part 2-57: Tests - Test Ff: Vibration - Time-history and sine-beat method.

  • IEC 60255 -21- 1: 1988. Electrical relays - Part 21: Vibration, shock, bump and seismic tests on measuring relays and protection equipment - Section one: Vibration tests (sinusoidal).


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  • Failure Analysis of Electrical Equipment under Operational Vibration

Abstract Views: 145  |  PDF Views: 0

Authors

R. Panneer Selvam
Joint Director, Central Power Research Institute, Bengaluru – 560080, Karnataka, India
Yamini Gupta
Engineering Officer, Central Power Research Institute, Bengaluru – 560080, Karnataka, India
D. Nagesh Babu
Engineering Assistant, Central Power Research Institute, Bengaluru – 560080, Karnataka, India

Abstract


Equipment is subjected to vibration due to operating environment, transportation, handling and earthquake. Vibration results in dynamic loading, wherein failure of equipment depends on magnitude and frequency content of vibration. Equipment should perform its desired function during and/or after the vibration. The need to understand the effects of vibration and shock on equipment reliability is paramount. Vibration qualification is performed to determine if a product can withstand the rigors of its intended use environment, to ensure the final design will not fall apart during shipping, for environmental stress screening to weed out production defects, or even as a form of accelerated stress testing. Vibration tests are commonly used to improve the reliability of instruments, sub components and equipment or a system. Earthquake is the natural disaster which results in three-dimensional ground vibrations. Failure analysis of electrical equipment subjected to operational vibration environment is presented in this paper.

Keywords


Damping, Resonance Frequency, Vibration

References





DOI: https://doi.org/10.33686/prj.v17i1.221846