| Power Distribution Transformer |
Power distribution transformers are used in electric power systems. The final part of the distribution system at medium voltage are the power distribution transformers. Due to the Iow impedance voltage, this type of power distribution transformer will not substantially limit the short circuit current in the case of a fault on its secondary side. It is therefore common practice that power distribution transformers have to be type tested to their ultimate short-circuit conditions. power distribution transformers may be oil filled (IEC 60076) or dry-type (IEC 60726). Regularly, a manufacturer offers a complete range of five power distribution transformers, which can be certified in one test access very efficiently.
You use a power distribution transformer when you have no interest in what happens below the LV terminal of the power distribution transformer. You use a power distribution transformer element if you are interested in modeling loads or lines on the LV side of the power distribution transformer. If you have a node with a power distribution transformer, any loads on that node are assumed to be applied at the LV side of the power distribution transformer. Modeling the power distribution transformer gives you the benefit of computed values for secondary voltages, and transformer losses due to series (or copper) losses and due to no load (or core energization) losses.
