The basic and even more complex design of the transformers is well known. Small and big transformers have their alternations in core or wiring design. And depending on the size of the transformer its weight can change massively. Transformers that Varelen electric supplies can weigh from around 2t to even 250t.
This raises the question of how you move this amount of steel and liquid. And how do you design the transformer case to be ready for heavy lifting?
Our factory MV&HV transformers are constructed with lifting points and more specifically with lifting lugs. They are positioned at structurally strong points on the transformer, near the top corners or along the sides. For correct and safe lifting all lugs on the tank must be used while lifting the transformer.
Smaller transformers have one lifting lug on each side on the opposite corners of the transformer tank. It is enough to keep the transformer balanced during the lifting as these small transformers usually do not have a lot of ancillary equipment attached.
The bigger transformers have 4 lifting lugs distributed near the top corners of the tank. Lifting lugs are welded to the transformer's tank and designed to accommodate shackles or hooks securely. The lifting points are located to distribute the weight evenly, even with added radiators, LV cabinets or MV switchgear. Additionally, the lifting points are easily accessible without obstructions, allowing for straightforward attachment of lifting equipment.
Varelen's three phase oil immersed distribution transformer lifting lugs are clearly marked with red paint on the edge of the lug.
Additionally, the transformers are equipped with jacking plates for lifting them on-site in situations where it is not possible to use the crane, i.e. with the overhead power lines. They are designed to jack up the transformer to be able to put tracks under it and slide it into position.
For more information about the transformer design and transporting of our transformers to installation sites please get in touch.
