OIL FILLED TRANSFORMERS
Our experience in the field has enabled us to solve a wide range of requirements even for special units, i.e. converter transformers with 6-12-18-24-36 pulse, earthling transformers with and without auxiliaries, transformers for solar plants with 1-2-3 secondary windings, HV/HV transformers, multi voltage transformers, transformers with different type of oil: Silicon type, MIDEL, FR3. Shunt reactors, current limiting, damping, tuning (filter), arc-suppression, smoothing reactors, LV/MV/HV reactors up to 52 kV.
SIM are present in the national and international market . The recently built new works are equipped with high-tech producing plants, the most sophisticated automation job order systems via real time production management.
In a continuously expanding and developing world where it is required to be competitive and dynamic in every market, the company shall give evidence of its skills providing constantly state of art products that fulfils the markets’ request.
Being in the business as we put it here in SIM does not lie as much in waiting for replies from the market, but rather in proposing themselves, understanding the demands, evaluating the needs and at the customers’ side offering more than required by constantly calling themselves into question so to increase and improve.
The transformer windings are concentric and coaxial to the core limbs. The windings are made of copper or aluminum with insulation material in class A or F. Channels in the
windings guarantee oil circulation and windings optimal cooling.
All transformers up to 3150 kVA are equipped with corrugated tank wall panels. Higher power units use special developed radiators made with cold rolled and laminated steel. All transformers up to 3150 kVA can be filled without conservator.
The outside walls are protected with water resistant paint RAL 7031 or RAL 7033 with painting thickness of minimum 100 micron.
The primary and secondary windings are made with electrolytic aluminum or copper, with insulation in pure cellulose paper or in double enamel for wires of small diameter. These windings are oval or circular section and are a concentric type, coaxial to the core columns. The high voltage winding is made with a wire or a metal strip, helically wound with more layers or with continuous disc in relationship to the working voltage and the transformer’s power. The low voltage windings are made with foil or strip and are equipped with terminal bars welded along the whole coil length in order to guarantee the correct sturdiness and electro-mechanical stress. Each winding layer of low and medium voltage is insulated with pure cellulose paper, the oil’s circulation and necessary cooling are assured by wide channels placed between the windings layers. Insulation between high and low voltage and between the latter and the core is made with compressed cardboard cylinders with a well-sized thickness.
