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Monthly Archive for: «May, 2014»

Generating Electricity with Combustion Turbines

There are two basic types of combustion turbines (CTs) other than the microturbines: The heavy frame industrial turbines and The aeroderivative turbines. The heavy frame systems are derived from similar models that were steam turbine… Read more

May 28, 2014 | Edvard

A transformer is only as strong as its weakest link

Capacity (or rating) of a transformer is limited by the temperature that the insulation can tolerate. Ratings can be increased by reducing core and copper losses, by increasing the rate of heat dissipation (better cooling),… Read more

May 26, 2014 | Edvard

A transformer is only as strong as its weakest link

The role of medium voltage switchgear in power system

Most electrical appliances used in household, commercial and industrial applications work with low voltage. High voltage is used not only to transmit electrical energy over very large distances, but also for regional distribution to the… Read more

May 23, 2014 | Edvard

The role of medium voltage switchgear in power system

Arriving at the scene of a pole fire. What to do?

Utility pole fires are common and should be treated with great respect by firefighters. Pole fires are normally caused by the failure of insulators, switches, catastrophic failure of transformers or oil-filled switching equipment. Some poles… Read more

May 21, 2014 | Edvard

Instrument transformers (CTs, VTs) in the system

The three main tasks of instrument transformers are: To transform currents or voltages from a usually high value to a value easy to handle for relays and instruments. To insulate the metering circuit from the primary… Read more

May 19, 2014 | Edvard

Effects of Speed Variation on Rotodynamic Pumps

A rotodynamic pump is a dynamic device with the head generated by a rotating impeller. Thus, there is a relationship between impeller peripheral velocity and generated head. Peripheral velocity is directly related to shaft rotational… Read more

May 09, 2014 | Edvard

10 Strategies for Automation and Production Systems

Following the USA Principle is a good first step in any automation project. The USA Principle is a common sense approach to automation projects. Similar procedures have been suggested in the manufacturing and automation trade… Read more

May 07, 2014 | Edvard

9 typical issues addressed in a T&D network planning project

Transmission and distribution network planning projects are highly individual, because in each case the special conditions of the supply area, load demand and geographic distribution, technical standards and requirements, current status of the existing system,… Read more

May 02, 2014 | Edvard

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