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 electrically operated equipment. Standard transformers convert approximately 95% of the… Read more
Jan 08, 2011 | By Edvard Csanyi
Solar Power
Solar Energy And Silver
The solar industry isn’t the largest consumer of silver, but it is a growing market that could give silver producers a boost. Most of the markets that silver serves follow traditional supply-demand economics and therefore competition is based on price,… Read more
Jan 07, 2011 | By Edvard Csanyi
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 The two main documents which describe losses in transformers are: the European Standard EN 50464-1, which has superseded the harmonised document HD428 for… Read more
Jan 07, 2011 | By Edvard Csanyi
High Voltage
SF6 gas as insulating and arc-quenching medium
Sulphur hexafluoride gas (SF6) is employed as insulation in all parts of the installation, and in the circuit-breaker also for arc-quenching. SF6 is an electronegative gas, its dielectric strength at atmospheric pressure is approximately three times that of air. It… Read more
Jan 06, 2011 | By Edvard Csanyi
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 and load sharing. As systems change over time, and transformers… Read more
Jan 05, 2011 | By Edvard Csanyi
Maintenance
Maintenance Of SF6 Gas Circuit Breakers
Sulfur Hexafluoride (SF6) is an excellent gaseous dielectric for high voltage power applications. It has been used extensively in high voltage circuit breakers and other switchgears employed by the power industry. Applications for SF6 include gas insulated transmission lines and’gas… Read more
Jan 04, 2011 | By Edvard Csanyi
Cables
Comparison Of Cable Insulating Materials
Electrical insulation materials are employed over the metallic conductors of underground cables at all voltage ratings. Polymeric materials are employed as the insulation, but the nature of the polymer may vary with the voltage class. Since paper insulation was used… Read more
Jan 03, 2011 | By Edvard Csanyi
Energy and Power
Do You Understand What Is Electric Shock?
Electric current passing through the body, particularly alternating current at power frequencies of 50 Hz and 60 Hz, may disrupt the nervous system, causing muscular reaction and the painful sensation of electric shock. The most common reaction is to be… Read more
Jan 02, 2011 | By Edvard Csanyi
Energy Efficiency
Energy Efficency In Hospitals – Cogeneration (6)
Cogeneration is combined generation of heat and electricity. The advantage of cogeneration is that it enables the heat released by electricity generation to be used. The most well-known form of cogeneration is an electricity generator powered by an internal combustion… Read more
Jan 02, 2011 | By Edvard Csanyi
Low Voltage
Maintenance Of Molded Case Circuit Breakers (MCCB)
The maintenance of circuit breakers deserves special consideration because of their importance for routine switching and for protection of other equipment. Electric transmission system breakups and equipment destruction can occur if a circuit breaker fails to operate because of a… Read more
Jan 01, 2011 | By Edvard Csanyi
Low Voltage
Maintenance Of Low Voltage Circuit Breakers
The deterioration of low voltage circuit breaker is normal and this process begins as soon as the circuit breaker is installed. If deterioration is not checked, it can cause failures and malfunctions. The purpose of an electrical preventive maintenance and… Read more
Dec 31, 2010 | By Edvard Csanyi
Wind Power
Siemens Wind Turbine SWT-2.3-82
The SWT-2.3-82 turbine is the classical workhorse for utility-scale wind turbine projects, designed on the basis of our unique experience from more than 25 years of leading-edge design and construction of wind turbines. The turbine represents the best of the… Read more
Dec 30, 2010 | By Edvard Csanyi
News
Happy Holidays
With 2010 behind us, EEP wishes a very safe and warm new year to you and yours. Even in a very slow economic environment we at EEP have grown, mainly thanks to you. Increasing publishing, visits, readings and importance to… Read more
Dec 30, 2010 | By Edvard Csanyi
Energy Efficiency
Energy Efficency In Hospitals – Lighting (part 5)
Lighting is one of the large energy consumers in hospitals, just as in many other kinds of utility buildings. Various studies have shown that some 20% of the total energy consumption in a hospital is accounted for by the lighting… Read more
Dec 30, 2010 | By Edvard Csanyi
IEC Standards
Advantages Of IEC 61850
One of the significant challenges that substation engineers face is justifying substation automation investments. The positive impacts that automation has on operating costs, increased power quality, and reduced outage response are well known. But little attention is paid to how… Read more
Dec 29, 2010 | By Edvard Csanyi
