#power transformer

This paper reviews the evolution of core and frame (clamp) insulation failures in power transformers and examines representative fault cases.

This article addresses the issue of geomagnetically induced currents (GIC) produced by electromagnetic pulse at a high-altitude nuclear explosion (HEMP) and its influence on power transformers.

Kyrgyzstan exported 4,450 transformers in early 2025, reaching Russia, Kazakhstan, UAE, and other global markets, signaling growing industrial competitiveness.

This study presents a comprehensive analysis of the power transformer supply chain.

Vitaly Gurin and Marius Grisaru explore the impact of voltage rise rate and gap spacing on the coefficients of variation (CV%) of transformer oil breakdown voltage.

The article is intended for young transformer engineers and for teaching transformers to undergraduate and postgraduate students in universities.

For the future statistical optimization of power transformer insulation design, more than two hundred publications on transformer oil breakdown voltage (BDV) were reviewed.

The second part of Vitaly Gurin’s column examines the data of Soviet scientists on the dependence of the electrical strength of insulation of power transformers on time in historical development.

The article provides best practices on online monitoring and diagnostics systems used for transformer oil and addresses the calculation of the transformer oil quality index.

Eight power transformers have been cleared from Lagos Port for installation in Nigeria.

Electricity transformer explosion causes 15 deaths on the banks of the Alaknanda river in India.

The Transmission Company of Nigeria has successfully energised a 60 MVA power transformer to boost electricity supply.

Nigerian president Muhammadu Buhari’s administration, the Federal Executive Council (FEC) awarded a contract sum of $592 M (N226 B) for power supply upgrade in Nigeria.

UK, Porthmadog: The ship transporting the transformer will be anchored off Morfa Bychan before unloading the transformer to the beach.

USA, Washington, Seattle: A 110 T power transformer arrived at the East Pine Substation in Seattle after a long cross-continent journey.

India, Mumbai: Indian transformer manufacturer Servokon has showcased a 16,000 KVA transformer at Electrama 2023.

Using a 250 T girder bridge, Collett & Sons Ltd has delivered two 215 T super grid transformers from Stafford to Leyhole, Kintore.

The heaviest unit yet produced by Koncar Power Transformers Ltd., a joint venture of Siemens Energy and Koncar, has reached Abu Dhabi.

China: Hitachi Energy has supplied two 110 kV, 63 MVA EconiQ™ power transformers to China’s largest grid operator the State Grid Corporation of China (SGCC).

Germany, Frankfurt: The operator TenneT is modernizing the power supply.

Nigeria: The Transmission Company of Nigeria (TCN) has announced installation of a new 33 kV power transformer and circuit breaker.

Germany, Dresden: A main power transformer at Dresden Station in Morris caught fire early on 16 October, but operators at the station quickly extinguished it.

Sweden: Freight Forwarders, Martin Bencher Group, have successfully delivered a complex and challenging transport of a 225 T power transformer to Sweden.

Germany, Pulverdingen: The Siemens Energy transformer was made ready by Siemens Energy and Flux Transformer Services in Pulverdingen Substation.