The transformers are designed for continuous duty at nominal voltage at an ambient temperature of up to 40°C, a nominal frequency of 50/60 Hz and a maximum installation height of 1000m above M.S.L.. The ambient temperature and the place of installation have a particular influence on the full nominal load.
The core material is cold-rolled magnetic sheet steel with preferred orientation. Further materials are selected to suit the defined thermal class. The preferred thermal class is 150°C.
Our production complies with applicable VDE/EN regulations.
Impregnation and encapsulation
Generally, the transformers are vacuum impregnated in artificial resin or encapsulated in cast resin.
Protection IP 00
Transformers are generally supplied in open form, in accordance with protection IP 00. The customer may of course choose an alternative degree of protection.
The output data refers to the nominal capacity in VA, i.e. the output available on the secondary side in continuous operation. If the transformer has more than one output winding, the total nominal output is the sum of the individual nominal capacities.
In the standard design, the transformer has a primary and a secondary winding with freely selectable voltages (e.g. 230V, 400V). It is recommended that on the primary side +-5% taps are provided in order to compensate for fluctuating mains voltages. Please specify the required voltage range when ordering.
In the case of transformers with separate windings, there is no electrically conductive connection between the primary and secondary windings. They are indirectly coupled. On request, a protective foil may be provided between the primary and the secondary winding.
Autotransformers have directly coupled primary and secondary windings. By careful determination of the output in relation to the size, enormous savings are achievable with respect to the quantities of core material and copper. The savings are directly related to the difference between input and output voltage, i.e. the smaller the difference the higher the savings. There is a difference between output per type and throughput rating. The throughput rating should be specified by the customer.