The term biased-differential or percentage differential is based on the fact that the operating threshold increases with the through current. Because of that, comparison of upstream and downstream currents in… Read more
Oct 22, 2018 | Edvard
A short circuit in an electrical circuit is a part of the circuit that for some reasons has become “shorter” than it should be. The current in an electrical circuit… Read more
Oct 03, 2018 | Edvard
When selecting the type of transformer correctly electrical engineer needs to know its different electrical and thermal properties and the resistance to stresses due to faults or normal service of… Read more
Sep 26, 2018 | Edvard
Various types of instrument transformers are currently in use on the basis of the varied applications of these devices. The construction aspects and sizing play an important role in the… Read more
Sep 05, 2018 | Edvard
Developments in communication have done much to realize the digital substation, but to realize a full digital substation it is necessary to have everything in digital form. Whilst much substation… Read more
Jul 25, 2018 | Edvard
There are many methods applied to bolster the short circuit withstand capability of the transformers: improvement of the materials, reforming of the design and good maintenance in the operation process… Read more
Jun 13, 2018 | Edvard
Transformers are important system components available in many different constructions. The range of HV transformers reaches from small distribution transformers (from 100 kVA) up to large transformers having several hundred… Read more
May 14, 2018 | Edvard
Even with the best engineering practices, abnormal situations can arise that may produce damage to power transformer and other equipment and compromise the continuity of the delivery of quality power… Read more
May 02, 2018 | Edvard
Because of the predominantly inductive character of the power system, an active power flow between source and load must be accomplished with a phase lag between the terminals. Phase-shifting transformers… Read more
Apr 23, 2018 | Edvard
Like all other power system systems, no matter how carefully the system is designed, losses are present and must be modeled before an accurate representation of the system response can… Read more
Feb 21, 2018 | Edvard
