November 2014

GENERATION OF AC HIGH VOLTAGE BY CASCADED TRANSFORMERS

For voltages higher than about 300 to 500 kV, the cascading of transformers is a big advantage, as the weight of a whole testing set can be subdivided into single units and therefore transport and erection becomes easier. Also, with this, the transformer cost for a given voltage may be reduced, since cascaded units need […]

GENERATION OF AC HIGH VOLTAGE BY CASCADED TRANSFORMERS Read More »

CASCADED TRANSFORMERS METHOD FOR GENERATING AC HIGH VOLTAGE

For voltages higher than 400 KV, it is desired to cascade two or more transformers depending upon the voltage requirements. With this, the weight of the whole unit is subdivided into single units and, therefore, transport and erection becomes easier. Also, with this, the transformer cost for a given voltage may be reduced, since cascaded

CASCADED TRANSFORMERS METHOD FOR GENERATING AC HIGH VOLTAGE Read More »

SOLID DIELECTRICS USED IN POWER APPARATUS

The main requirements of the insulating materials used for power apparatus are: 1. High insulation resistance 2. High dielectric strength 3. Good mechanical properties i.e tenacity and elasticity 4. It should not be affected by chemicals around it 5. It should be non-hygroscopic because the dielectric strength of any material goes very much down with

SOLID DIELECTRICS USED IN POWER APPARATUS Read More »

TOP 5 POWER QUALITY MYTHS

1) OLD GUIDELINES ARE NOT THE BEST GUIDELINES Guidelines like the Computer Business Equipment Manufacturers Association Curve (CBEMA, now called the ITIC Curve) and the Federal Information Processing Standards Pub94 (FIPS Pub94) are still frequently cited as being modern power quality guidelines. The ITIC curve is a generic guideline for characterizing how electronic loads typically

TOP 5 POWER QUALITY MYTHS Read More »

MAJOR FACTORS CONTRIBUTING TO POWER QUALITY ISSUES

The three major factors contributing to the problems associated with power quality are: USE OF SENSITIVE ELECTRONIC LOADS The electric utility system is designed to provide reliable, efficient, bulk power that is suitable for the very large majority of electrical equipment. However, devices like computers and digital controllers have been widely adopted by electrical end-users.

MAJOR FACTORS CONTRIBUTING TO POWER QUALITY ISSUES Read More »