Technical brochure
TB 947 WG A3.48

Fourth CIGRE international reliability survey on equipment operated in 2014-2017

The reliability of substation equipment in power systems is a major concern, particularly for transmission and distribution system operators and asset owners. A major failure of substation equipment can result in significant system outages with the associated power restoration efforts as well as possible safety implications. There are also financial implications in case of poor reliability. In addition to the costs of system outage and restoration, poor reliability will contribute to higher system operation and maintenance costs for the operators and, ultimately, their customers.

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A3

Transmission and distribution equipment

This Technical Brochure has been created by a Working Group from the CIGRE Transmission and distribution equipment Study Committee which is one of CIGRE's 16 domains of work.
The scope of the SC A3 covers theory, principles and concepts, functionality, technological development, design, performance and application of materials, efficiency and operation for all devices for switching, interrupting and limiting currents, load switches, re-closers, ring-main units disconnecting switches, earthing switches surges arresters, capacitors, busbars, equipment insulators and instrument transformers and all other equipment within the substation not specifically covered under another equipment Study
Committee’s scopes.

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