Energy and Power
An example of the effectiveness of directional overcurrent relays (ANSI 67, 67N)
When fault currents can flow in more than one direction with respect to the load current it is often desirable to determine which direction the fault current is flowing and trip… Read more
Oct 10, 2014 | By Edvard Csanyi
Energy and Power
Applications and characteristics of overcurrent potection relays (ANSI 50, 51)
Overcurrent relays are the most commonly-used protective relay type. Time-overcurrent relays are available with various timing characteristics to coordinate with other protective devices and to protect specific equipment. Instantaneous overcurrent relays have… Read more
Oct 08, 2014 | By Edvard Csanyi
Energy and Power
What Is Earth And Why And How Do We Connect To It?
The thin layer of material which covers our planet – rock, clay, chalk or whatever – is what we in the world of electricity refer to as earth. So, why… Read more
Oct 06, 2014 | By Edvard Csanyi
Energy and Power
Rating Definitions Applied to Medium Voltage Fuses
The definition of low voltage fuses is equally applicable to medium voltage fuses. Medium voltage level is defined by standard ANSI C84 as containing standard system voltages from 2400 through 69,000 V,… Read more
Oct 03, 2014 | By Edvard Csanyi
Electric Motor
Energy Efficiency Aspects of Electric Motors
Three-phase squirrel-cage induction motors comprise a considerable percentage of the electrical load in the United States. Design, operation, and maintenance of these machines is well described in some of the… Read more
Oct 01, 2014 | By Edvard Csanyi
Energy and Power
Maintenance Management Of Electrical Equipment (Condition Monitoring Based) – 6
Read previous parts of this serie – Part 1 | Part 2 | Part 3 | Part 4 and Part 5 Proper Use of Predictive Technologies Merits and Demerits of CDM program Advantages Disadvantages CDM is more… Read more
Sep 24, 2014 | By Ashok Parikh
Energy and Power
The need for electric energy is never ending
As you guess, yes, the need for electric energy is never ending. Along with the growth in demand for electric power, sustainable development, environmental issues, and power quality and reliability… Read more
Sep 22, 2014 | By Edvard Csanyi
Energy and Power
Rating Definitions Applied to Low Voltage Molded-Case Circuit Breaker (MCCB)
The molded-case circuit breaker is the “workhorse” for system protection 600V and below. A circuit breaker is a device designed to open and close by nonautomatic means and to open the… Read more
Sep 19, 2014 | By Edvard Csanyi
Cables
4 ways in which noise can enter a signal cable and its control – Part 2
Continued from part 1… Read here. In previous part of this technical article, I wrote about electrical noise occurs or is transmitted into a signal cable system in the following… Read more
Sep 15, 2014 | By Edvard Csanyi
Energy and Power
Maintenance Management Of Electrical Equipment (Condition Monitoring Based) – 5
In case of new industry, it would be easy to implement Condition Monitoring based Maintenance Management (CDM) as apart of respective equipment or system itself after evaluating various factors discussed in… Read more
Sep 12, 2014 | By Ashok Parikh
Energy and Power
14 terms of particular importance when discussing arc flash hazards
Electrical arcs form when a medium that is normally an insulator, such as air, is subjected to an electric field strong enough to cause it to become ionized. This ionization causes… Read more
Sep 10, 2014 | By Edvard Csanyi
Cables
4 ways in which noise can enter a signal cable and its control
Noise, or interference, can be defined as undesirable electrical signals, which distort or interfere with an original (or desired) signal. Noise could be transient (temporary) or constant. Unpredictable transient noise… Read more
Sep 08, 2014 | By Edvard Csanyi
Energy and Power
Maintenance Management Of Electrical Equipment (Condition Monitoring Based) – 4
Read previous parts of this serie – Part 1, Part 2 and Part 3 After deciding to go for the implementation of CDM based on evaluation of various factors discussed in foregoing… Read more
Sep 05, 2014 | By Ashok Parikh
Energy and Power
Rating Definitions Applied to Medium Voltage Circuit Breaker
The medium voltage circuit breaker is the device of choice when sophisticated system protection at the medium voltage level is required. Most modern medium voltage circuit breakers use a vacuum as the interrupting means, although… Read more
Sep 03, 2014 | By Edvard Csanyi
Energy and Power
Maintenance Management Of Electrical Equipment (Condition Monitoring Based) – 3
It is beyond the scope of this technical article to discuss the development of performance and dependability models for analysis, assessment and justification of CDM program. The scope is kept… Read more
Sep 01, 2014 | By Ashok Parikh
