Voltage Variations Effects on Power Plant Equipment
When the voltage at the terminal of the electrical equipment deviates from the value as specified from the name plate the equipment performance and life time of the equipment are…
Factors affect Voltage Level Selection in Service System
Some of the factors that effect the selection of nominal voltage levels for the service systems are: Type and size of the load to be served Distance to which power…
Harmonics Disadvantages in Power System
Sources of Harmonics: Several sources of harmonic currents that may be found on electrical power distribution networks are listed below: Variable speed motor drives Rectifiers Arc furnaces Wielding equipment Uninterrupted…
Induction Motor Operating Characteristics
All torques of an induction motor, at a given slip, vary approximately as the square of the voltage applied to its terminals Low rotor resistance results in high full load…
Generating Station Grounding Principles
Grounding systems in the generating stations should able to meet the following grounding principles: Grounding Principles: Metallic enclosure on electrical equipment and exposed non current carrying conductive materials in generating…
Ferroresonance in Power Transformers
Ferroresonance:Â Ferroresonance phenomenon can be triggered off through interaction of the system capacitance with a non-linear inductance, when transformer is at no-load. This oscillatory phenomenon or resonance phenomenon result in…
What Is Step and Touch Potential and Reducing Resistance To Ground?
Step Potential Step potential is the step voltage between the feet of a person standing near an energized grounded object. It is equal to the difference in voltage, given by…
Methods to Reduce Step Potential and Touch Potential in Substation
Step Potential and Touch Potentials are very important in substations because during ground faults all the ground current returns to the substation transformer (as the substation transformer is grounded). The…
Substation Safety Clearances
Majority of electrical substations will be air insulated type. All the electrical equipment live parts will be exposed .All the electrical equipment in the substation shall be arranged in such…
Advantages and Disadvantages of Air Blast Circuit Breakers
In air blast circuit breakers, compressed air at a pressure of 20-30 kg/cm2Â is employed as an arc quenching medium. Air blast circuit breakers are suitable for operating voltage of 132kV…
