OTTAVI srl is the most advanced synthesis of design dedicated to machines for the MV / LV, MV / LV and MV / LV high-performance, data referring to the losses and the physical quantities of each transformer, in its size reference, confirm engineering excellence.
The customer requirements always involve, in our design culture, a study that culminates in a precise estimate as accurate, which led the pole engineering to create and catalog also intermediate sizes, intended for laying measured for each stall transformation.
Advanced versions of high-performance machines arrive with reduced drops and higher efficiency, insomuch as overcome all the limitations set so far. Yet, beyond these thresholds, a new study of the project arises, which introduces a concept of transformer so advanced that subvert the standard canons currently used in the usual logic of calculation, design, execution and application. And this is the most significant premise to divisional production resin dedicated to "ECOSYSTEM".
The company is strongly based on the forty years of experience characterized by the executive culture of oil transformer which, together with resin transformers are widely used in:
CONSTRUCTION, HOSPITALS, AIRPORTS, BANKS, MALLS, SUPERMARKET; VARIOUS APPLICATIONS IN INDUSTRY AND IN TRANSPORT AND NAVAL; SPECIAL IN FOUNDRY AND GLASSWARE, excavations and TRIVELLAZIONI, mining, OIL AND GAS; AGRICULTURE, PACKAGING LINES, AND ASSEMBLY LINES IN RECENT YEARS IN WIND FARMS, SOLAR, BIOGAS.
THE PLANNING
The transformer is an electromagnetic induction electric machine whose function is to transfer electricity between two different systems of voltage at the same frequency. Transformers are available in the market in different construction technologies that impact significantly on the electrical characteristics and fields of application. For a correct choice of the type you need to know the different electrical characteristics, thermal and stress resistance due to failure or to normal service. A parameter that must be taken out for the choice of the type of resin and the oil, is the operating mode for which it is intended.
TECHNICAL PARAMETERS RESIN TRANSFORMERS AND OIL TRANSFORMERS
1) Site Installation and Environmental Sensitivity
Because of the differences of the two types of construction, the installation location significantly varies. The oil transformers can be installed both indoors and outdoors and are resistant to atmospheric agents and pollutants, while resin prefer only a pose inside, protected from dust, moisture, and with a sufficient air.
2) Maintenance
The routine maintenance of transformers varies from once a year for those in resin to two years for those in oil. In the first case the control mainly consists in the careful cleaning of sensitive parts of the machine and to a control of torque, while in the second case, in addition to cleaning operations and control of the regular operation of any accessories, an oil sample is taken in order to check the level of isolation that may vary over time and usage.
3) Losses and Overloads
Losses in transformers are divided into:
P0 = load losses. Losses related to the magnetic core, is always present since the installation of the transformer, regardless of load.
CCP 75 ° C = Load losses measured at 75 ° C. Losses related to the windings and the load-dependent.
The resin transformers, for constructive characteristics, present, with respect to the corresponding oil transformers, P0 further average of 3% (up to a maximum of 15%), but significantly lower Pcc average of 40% (up to a maximum of 60% ).
It is apparent, therefore, that in the case of a use at very low loads or zero is preferable to the use of oil transformers; otherwise, it is strongly recommended to use resin transformers, because the total losses during the regular exercise is much lower. This choice is even more preferable when the operation of the transformer is interested in sudden overload and short-term (up to 50% of rated power), as more resistant to such stresses.
4) Resistance
The resin transformers, compared to those in oil, have a high stability in the resistance of the short-circuit phenomena, which have nothing also hygroscopicity, having them come in the environmental class E2.
