The VACUTAP® VV® is in operation all over the world. Especially in Asia. Two transformer manufacturers report on their experiences.
EEMC Transformer from Vietnam

Founded: 1971 — Company headquarters: Hanoi — Key markets: Vietnam, Asia and Australia — Website: eemc.com.vn/en
For over 20 years, transformer manufacturer Dong Anh Electrical Equipment Corporation JSC (EEMC) has been successfully using the VACUTAP® VV® in its 110 kV transformers, which ensure a stable power supply, particularly in substations in Vietnam and other Asian countries. The VACUTAP® VV® offers major advantages both in terms of design and production. Thanks to its adaptability to different enclosure designs, EEMC can easily implement a wide range of project specifications. Nguyen Vu Cuong, General Director at EEMC, explains: “For over two decades, EEMC has consistently relied on the VACUTAP® VV on-load tap-changer (OLTC) from Maschinenfabrik Reinhausen (MR) for our 110 kV power transformers. This product has demonstrated exceptional reliability and quality, playing a crucial role in ensuring the stable operation of our transformers and enhancing the reliability of Vietnam’s power grid. By integrating MR’s consistently high-quality OLTCs, EEMC has successfully improved product performance, reduced maintenance and warranty costs, and strengthened our position in international markets.”
A success story
For over 20 years, EEMC has utilized the VACUTAP® VV® in transformer production, recognizing its pivotal role in maintaining grid stability and optimizing power quality. Designed to facilitate seamless voltage regulation under load conditions, the VACUTAP® VV® has consistently delivered superior performance and reliability.
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The compact and optimized design of the VACUTAP® VV® significantly reduces the volume of oil required in the OLTC compartment while enhancing the overall efficiency of the transformer. Its adaptability to various enclosure configurations, including bell and upper flange designs, enables manufacturers to accommodate diverse project specifications with ease. Additionally, its standardized connection system minimizes wiring errors, enhances assembly efficiency, and ensures consistently high-quality output.
Einer der bemerkenswertesten Vorteile des VACUTAP® VV® ist seine außergewöhnliche Langlebigkeit.
One of the most notable advantages of the VACUTAP® VV® is its exceptional durability and extended maintenance intervals, which significantly reduce downtime, enhance operational efficiency, and prolong the transformer lifespan. Today, EEMC deploys the VACUTAP® VV® across a wide range of 110kV transformers installed in transmission and distribution substations, as well as in renewable energy facilities, including wind, solar, and hydroelectric power plants. Furthermore, the VACUTAP® VV® meets the technical requirements necessary for integration with intelligent monitoring systems, supporting digital substations and fully automated, unmanned operation.
Strong Partnership
With more than two decades of collaboration, EEMC and MR have cultivated a robust and enduring partnership founded on mutual trust and a shared commitment to technological advancement. Beyond delivering high-quality products, MR has continuously supported EEMC in research and development, design optimization, and technological innovation, contributing to improved transformer efficiency and performance.
As a global leader in OLTC technology, MR is widely recognized for its commitment to quality, reliability, and innovation.
The company’s tap changers are the preferred choice among transformer manufacturers, including EEMC, due to their outstanding longevity, operational efficiency, and compliance with the highest industry standards.
Looking ahead, EEMC and MR will continue to collaborate in developing cutting-edge technological solutions to meet the increasing demands for automation and digitalization in the energy sector. “Together, we strive to enhance product quality, exceed customer expectations, and contribute to the modernization and sustainable development of power systems in Vietnam and worldwide”, says Nguyen Vu Cuong, General Director at EEMC.
MTM from Malaysia

Founded: 1977 — Company headquarters: Ampang Jaya — Key markets:Malaysia, ASEAN-countries, Middle East and Africa — Website: www.malaysiatransformer.com
Malaysia Transformer Manufacturing Sdn. Bhd. (MTM) specializes in distribution transformers up to 33 kV and power transformers up to 150 kV and has been working with MR for over 25 years. MTM appreciates the fact that MR on-load tap-changers are easy to install and require little maintenance during operation. Another important factor is the good service, as Firdaus Fuad, Head of Production and Plant at MTM, emphasizes: “In all the years that we have installed tap-changers from MR, there have been no problems or complications. The devices are extremely user-friendly and much easier to install than comparable products from other brands – clear proof of their well thought-out design and high-quality workmanship.”