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Archive: Category «Transformers»

Transformers

Transformer Winding Temperature Thermometer

These devices are supposed to indicate hottest spot in the winding based on the manufacturers heat run tests. At best, this device is only accurate at top nameplate rated load… Read more

Feb 25, 2011 | By Edvard

Transformer Winding Temperature Thermometer
Power Substation

Risk and Consequences Of Transformer Fire

The risk of a catastrophic fire with a properly inspected, tested, and maintained transformer is small. Proper maintenance and thorough testing of the transformer will prevent or detect many events… Read more

Feb 07, 2011 | By Edvard

Risk and Consequences Of Transformer Fire
Transformers

How To Connect Current Transformers?

The primary of a current transformer typically has only one turn. This is not really a turn or wrap around the core but just a conductor or bus going through… Read more

Jan 29, 2011 | By Edvard

How To Connect Current Transformers?
Transformers

Price Of A Transformer

Today the production of transformers is characterised by a large variety of designs, manufactured in relatively short batches to meet the demands of a variety of customers with ever-changing expectations…. Read more

Jan 26, 2011 | By Edvard

Price Of A Transformer
Transformers

What Are Partial Discharges On Cast Resin Transformers?

Partial discharges are electrical discharges occuring in insulating materials. The electrical discharge’s path only spans part of the insulating distance separating the conductors. The problem of partial discharges, whilst not… Read more

Jan 17, 2011 | By Edvard

Trihal transformer (IP00; IP31)
Energy Efficiency

NEMA TP1 Energy Efficiency Standard

Most commercial and industrial facilities require several low-voltage transformers to decrease the voltage received from the utility to the voltages used by various loads such as lighting, computers and other… Read more

Jan 08, 2011 | By Edvard

NEMA TP1 Energy Efficiency Standard
Transformers

Transformer Losses Standards

Unlike many countries around the world, Europe has no mandatory standard on energy efficiency of distribution transformers. The two main documents which describe losses in transformers are: the European Standard… Read more

Jan 07, 2011 | By Edvard

Transformer Losses Standards
Transformers

Parallel Operation Of Transformers

Most transformers installed in parallel have the same kVA, turn ratios, and impedances, which can make it difficult for power engineers in industrial and commercial facilities to understand circulating currents… Read more

Jan 05, 2011 | By Edvard

Parallel transformers - Siemens
Power Substation

Types and Origins of Substation Fires

The risk of fire in substations has been historically low, but the possible impacts of a fire can be catastrophic. Fires in substations can severely impact the supply of power… Read more

Dec 26, 2010 | By Edvard

Substation Fire Protection
Transformers

Transformer Cooling Classes

Since no transformer is truly an “ideal” transformer, each will incur a certain amount of energy loss, mainly that which is converted to heat. Methods of removing this heat can… Read more

Nov 28, 2010 | By Edvard

Transformer Cooling Classes
Transformers

Oil-Filled, Inert-Gas System

A positive seal of the transformer oil may be provided by an inert-gas system. Here, the tank is slightly pressurized by an inert gas such as nitrogen. The main tank… Read more

Nov 08, 2010 | By Edvard

Oil transformer


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