A transformer bushing carries current through a grounded barrier while providing insulation and mechanical support. This guide explains its structure, types and key selection factors.
Read more →Oil-impregnated paper (OIP) and resin-impregnated paper (RIP) are the two mainstream bushing technologies. This article compares insulation, maintenance, partial discharge, lifespan and cost.
Read more →Bushing failures are a major cause of unplanned transformer outages. This article covers moisture ingress, oil leaks, partial discharge, overheating and pollution — with practical prevention and testing measures.
Read more →Tan delta (dissipation factor) and power factor are the core tests for assessing bushing insulation condition. This guide explains the principle, typical limits, C1/C2 testing and result interpretation.
Read more →DIN (VDE 0670)/IEC 60137 and IEEE/ANSI C57.19 are the two major bushing standard families. This article compares their ratings, test requirements and terminology to help you specify correctly.
Read more →From 11 kV to 400 kV, bushing selection differs by voltage class. This article gives a systematic approach covering voltage class, BIL, rated current and creepage distance.
Read more →Creepage distance is a key parameter in high-voltage insulation design, directly determining flashover resistance in polluted environments. This article explains creepage distance, specific creepage and pollution classes.
Read more →Correct installation and maintenance are key to long bushing life. This article provides a complete best-practice checklist from storage and lifting to installation, commissioning and periodic maintenance.
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