Transformer Assembly and Vacuum Filling
Successful transformer installation starts long before energization. Proper assembly, controlled oil processing, and vacuum filling help prepare your equipment for reliable operation. Whether you are installing a new transformer, relocating an existing unit, or returning equipment to service after repairs, each step requires careful coordination.
MVA provides transformer assembly and vacuum filling services for substation, power, and extra-high-voltage transformers. Our experienced field crews help utilities, electric cooperatives, municipalities, industrial facilities, and power generation facilities move projects toward commissioning with an emphasis on safety, equipment integrity, and project requirements.
Transformer Assembly for New Installations and Relocations
Large transformers often arrive at the jobsite with components removed for transportation. Reassembling this equipment requires attention to the manufacturer’s instructions, component condition, sealing surfaces, and the sequence of work.
Depending on the transformer’s design and shipping configuration, assembly may involve bushings, radiators, cooling equipment, conservators, piping, and other accessories. Planning these activities alongside oil handling and testing helps keep installation work organized and reduces avoidable delays.
MVA works with your team to establish the assembly and filling scope around your equipment, site conditions, and project schedule.
Oil Processing and Vacuum Filling
Preparing insulating oil is an essential part of preparing the transformer for service. Oil processing and vacuum filling are related steps, with different purposes.
Oil processing conditions the fluid before it enters the transformer. Vacuum filling introduces the prepared oil under controlled vacuum conditions according to the equipment’s requirements.
MVA’s oil processing equipment heats, dehydrates, and degasses the oil before filling. Our rigs can process oil while simultaneously pulling vacuum on the transformer’s main tank, supporting an efficient, coordinated approach to the work.
Equipment Built for Large Transformer Projects
MVA’s oil processing rigs feature dual dry screw vacuum pumps and a V2500 variable frequency drive booster pump. With processing capabilities of 2,400 gallons per hour, our equipment supports demanding transformer installation and oil processing projects.
Our crews have undergone specialized training and plant visits, with commissioning experience on EHV transformers rated up to 765 kV and 1,000 MVA. That experience brings valuable perspective to projects where equipment size, installation requirements, and coordination are especially important.
Coordinate Assembly, Filling, and Testing
Transformer assembly and vacuum filling should be planned as part of the overall commissioning process. Mechanical completion, oil preparation, electrical testing, and the review of results all contribute to evaluating readiness for energization.
Discuss your project’s testing requirements early so the appropriate work can be included in the schedule. MVA’s electrical diagnostic services and transformer oil testing capabilities provide additional support for assessing equipment condition.
For existing transformers, installation or filling work may also create an opportunity to coordinate bushing replacement, regasketing, or other planned repairs during the same outage.
Plan Your Transformer Assembly and Vacuum Filling Project
A clear scope helps your team prepare for the work ahead. When requesting a quote, share the information available about your transformer and project, including:
Manufacturer, voltage class, and MVA rating.
New installation, relocation, or repair requirements.
Shipping configuration and components requiring assembly.
Insulating fluid type and estimated oil volume.
Site access and available work area.
Target installation dates and outage window.
Required testing, documentation, and manufacturer involvement.
MVA can review these details with your team to help define the services your project requires. Planning an installation or relocation? Learn how to prepare for transformer assembly and vacuum filling to help coordinate equipment information, site readiness, and testing requirements.
