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…
Shunt Vs Series Capacitors Advantages
Shunt Vs Series Capacitors Advantages Capacitors aid in minimizing losses and helps in reducing operating expenses. Capacitors should be placed where the reactive power demand is more as capacitors generate…
Types of Flow Meters
Types of flow meters are divided into two groups. One measures quantity (Positive Displacement); the other measures rate of flow (Inferential).
Split Range Control Working Principle
Split-range control is used when a single controller is employed to control two final-control elements (two valves for example). In such a system, the controller struggle to keep one controlled…
Circuit Breaker Making Capacity
During short circuit, circuit breaker contacts opens and automatically closes after few cycles to determine whether the fault is cleared. 90% of the faults occur in power system are transient…
