Transformers and the Right Maintenance for You

For each transformer received for repair, a defective statement and a statement of the scope of work are made up with a list of necessary spare parts and materials. Based on these documents and labor standards, they fill out a route map, which is the main regulatory document of the entire repair process. The difficulty in organizing repairs in workshops and factories is that the transformers coming into the repair are very diverse in size, purpose, power, voltage, design and weight. You can visit to understand the process perfectly.


This complicates the organization of the in-line repair method. However, the factory repair method is an advanced form, provides high labor productivity and repair quality, and improves the culture of repair work. At the same time, the costs associated with the delivery of transformers of I — III dimensions to the workshop (to the factory) and vice versa are fully paid off.

The Difficulties

Difficulties arise in the organization and implementation of major repairs of transformers with large masses and sizes. The costs associated with their delivery to the workshops (loading / transportation, unloading) located tens, and sometimes hundreds or more kilometers from the place of installation, often significantly exceed the cost of repair. In addition, for these purposes, good access roads and railways, special railway platforms, trailers (special trailers) are needed.

  • Therefore, the question of the location of repair of such transformers in each case is decided by calculation a feasibility study. More often, overhauls of such transformers are carried out directly at substations having towers with a lifting device, and at power plants, in machine rooms equipped with an overhead crane. As a rule, transformers are repaired in an individual way at repair sites, which try to be equipped with technological equipment as much as possible, with more advanced devices with the highest possible mechanization of labor-intensive operations.

The Right Works

Work associated with the repair of transformers of small sizes and masses can be easier to mechanize, and large sizes more difficult, therefore, a large expenditure of manual labor is required. During individual repairs, transformers of I — III dimensions, in the process of work, depending on the type of technological process, are moved from one workplace to another (there can be from four to five). With the increase in the dimensions and masses of transformers, the number of jobs and, accordingly, repair sites are reduced.

So, for example, for transformers of the fourth dimension and higher, having large dimensions and masses, measured in tens and hundreds of tons, in order to reduce the labor-intensive operations of moving assembly units and especially active parts, the number of repair sites is reduced to two or three. Repair sites and workplaces here are complex and equipped with mechanized universal racks, sets of fixtures, equipment, tools, instruments and equipment and other technological equipment indicated in the technological maps. They make the whole complex of dismantling and assembly work.

Last Words

When organizing complex workplaces and repair sites, a number of laborious rigging operations, lifting and moving the core, the active part, then the entire transformer from one site to another, several times to the test station and back for subsequent assembly and repair operations, etc. is excluded. In addition, it facilitates the team of collectors to complete the work comprehensively, according to the brigade contract.