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Archive: Category «Transformers»

Energy and Power

Underground substations – Out of sight, out of mind

Underground substations help to bring high voltage electricity directly into the city center. The stations are environmentally friendly, almost unnoticeable, and have none of the planning problems encountered by surface-built… Read more

Jan 09, 2016 | By Edvard Csanyi

Underground substation in urban area - Out of sight, out of mind
Protection

HV/MV/LV Transformer Protection Schemes

Transformer protection should take into account the power, voltage, vector group and the importance of the unit within a particular system. Depending on these factors, the transformers can be assigned… Read more

Nov 28, 2015 | By Edvard Csanyi

HV/MV/LV Transformer Protection Schemes
Energy and Power

Stop Transformer Noise With These Rules and Techniques

There are a number of basic installation precautions and transformer mounting techniques which if carefully noted and followed, will minimize the audible sound level (noise) of energized transformers. Some of… Read more

Nov 07, 2015 | By Edvard Csanyi

Stop Transformer Yelling With These Rules and Techniques
Electrical Lectures

Practical Considerations of Transformer Heat and Noise

In addition to unwanted electrical effects, transformers may also exhibit undesirable physical effects, the most notable being the production of heat and noise. Transformer noise is primarily a nuisance effect,… Read more

Jul 31, 2015 | By Edvard Csanyi

Practical Considerations of Transformer Heat and Noise
Testing and Commissioning

12 Transformer Factory Tests Briefly Explained

The remainder of the twelve factory tests are briefly summarized below. The details of the test set connections and formulas of some of the listed tests are already described in… Read more

Jun 29, 2015 | By Edvard Csanyi

12 Transformer Factory Tests Briefly Explained
Testing and Commissioning

Procedure for transformer lightning impulse test

The purpose of the impulse voltage test is to secure that the transformer insultations withstand the lightning overvoltages which may occur in service. Where: C1 – Impulse capacitor Rc – Charging… Read more

Jun 12, 2015 | By Edvard Csanyi

Procedure for transformer lightning impulse test
Maintenance

Maintenance of transformer load tap changers (LTC)

LTC maintenance is the basis for the regulating transformer’s high level of reliability. The background for maintenance recommendations is as follows: Oil: For LTCs where oil is used for arc-quenching,… Read more

Mar 25, 2015 | By Edvard Csanyi

Maintenance of Load Tap Changers (LTCs)


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