Almost all transformers incorporate some means of adjusting their voltage ratio, by adding or removing tapping turns. This adjustment may be made by an on-load tap-changer, or by means of… Read more
Dec 06, 2017 | Edvard
There are three main methods used to control the voltage at the end of a distribution feeder – By using control equipment to vary the voltage at the supply end… Read more
Dec 01, 2017 | Edvard
Normally in directly earthed and effectively earthed systems every available neutral point is earthed. Deviations from this occurs when the transformers neutral points are left unearthed. This is done to… Read more
Nov 27, 2017 | Edvard
Failure of transformer in power substation is not a sudden phenomenon, for that matter each and every failure will take place only after alerting through some pre-signs. If they went… Read more
Nov 06, 2017 | Edvard
The distortion in the waveform in the load current of any nonlinear device causes similar changes in the voltage waveform relative to the harmonic impedance of the source network. This… Read more
Oct 25, 2017 | Edvard
System intertie transformers connect extra high voltage (EHV) transmission systems with different voltages up to 800kV together with the purpose that active as well as reactive power can be exchanged… Read more
Sep 04, 2017 | Edvard
Although in general, the calculation of the reactive power to be installed is initially carried out globally, it is advisable not to be swayed by the apparent simplicity of this… Read more
Aug 30, 2017 | Edvard
The principal object of transformer maintenance is to maintain the insulation in good condition. Moisture, dust and excessive heat are the main reasons of insulation deterioration and avoidance of these… Read more
Jul 28, 2017 | Edvard
Three-phase voltage transformations can be accomplished by using three phase transformers, which are single devices with all windings constructed on a single iron core. Three phase voltage transformations also can… Read more
Jul 14, 2017 | Edvard
Condition monitoring equipment that can be used to extend the life of a transformer or to prevent catastrophic failure could pay for itself many times over. However, condition monitoring does… Read more
Jul 10, 2017 | Edvard
