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Monthly Archive for: «March, 2016»

10 Factors To Consider When Specifying Transformers

Guidelines to specifying transformers The following ten factors MUST be considered when specifying transformers // Kilovoltampere (kVA) Rating Voltage Ratings, Ratio, and Method of Connection (Delta or Wye) Voltage Taps Typical Impedance Values for Power… Read more

Mar 28, 2016 | Edvard

10 Factors To Consider When Specifying Transformers

Rotating Magnetic Field in AC machines

Rotating Magnetic Field // The fundamental principle of operation of AC machines is the generation of a rotating magnetic field, which causes the rotor to turn at a speed that depends on the speed… Read more

Mar 23, 2016 | Edvard

Rotating Magnetic Field in AC machines

3 Main causes of false differential current in transformer

Differential current // Certain phenomena can cause a substantial differential current to flow, when there is no fault, and these differential currents are generally sufficient to cause a percentage differential relay to trip. However, in these… Read more

Mar 21, 2016 | Edvard

3 Main causes of false differential current in transformer

Main substations installed on public MV network

Substations in public distribution systems This technical article is a reminder of the main substations installed on MV networks. It is concluded by two layouts showing their applications in real terms. A substation or… Read more

Mar 18, 2016 | Edvard

Main substations installed on public MV network

Matching transformers for parallel operation

3 rules for parallel transformers // The following rules must be obeyed in order to successfully connect two or more transformers in parallel with each other: The turns ratios of all of the transformers… Read more

Mar 16, 2016 | Edvard

Matching transformers for parallel operation
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