Development of mechanism for mounting secondary isolating contacts (SICs) in air circuit breakers (ACBs) with high operational reliability

Santosh B. Rane (), Yahya A.M. Narvel () and Niloy Khatua
Additional contact information
Santosh B. Rane: Sardar Patel College of Engineering Munshi Nagar
Yahya A.M. Narvel: Sardar Patel College of Engineering
Niloy Khatua: Switchgear Design and Development Centre

International Journal of System Assurance Engineering and Management, 2017, vol. 8, issue 2, No 98, 1816-1831

Abstract: Abstract The main function of Secondary Isolating Contacts (SICs) is to provide power supply to accessories in Air Circuit Breaker (ACB). A new SIC identified, had more number of contacts in a very compact design. There was a need for developing a mechanism to mount these SICs by having a key focus on compactness, alignment and tolerance in ACBs along with high probability of survival for the defined period and operation, to ensure repeated and prolonged use without failure in performance. After the development of mechanism, lifetime distributions were used to assess the reliability of the mechanism, based on the results obtained from operating reliability of the mechanism, modifications were done to improve the reliability. After subsequent developments and modifications in design, reliability of the mechanism increased from 14 to 88% in phase I to phase III respectively. The new arrangement can save up to 25% of the cost compared to current designs. Companies using such SICs can become more competitive, and pass on the cost savings benefits to end users. The volume of SIC and weight of plastic were reduced by approximately 66 and 70%, respectively. The amount of non-degradable waste entering the environment will be considerably reduced.

Keywords: Air Circuit Breaker; Mechanism development; Secondary Isolating Contacts; Reliability Assessment; Lifetime distributions (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (4)

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DOI: 10.1007/s13198-017-0678-5

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