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…
Power Systems Operation and Control Interview questions
What is load curve? The curve drawn between the variations of load on the power station with reference to time is known as load curve. There are three types, Daily…
How Integral Controller Reduces offset error ?
First we have to know how offset error appears in Proportional controller. Click here to read the article on proportional controller offset error. Automatic reset or integral action corrects for…
Why Offset in Proportional Controller ?
Proportional controller: With proportional band, the controller output changes in "proportion" to the error between process variable and set point. The amplitude of the change is adjustable from 1% to…
Basics of Fire Extinguisher
Fire Extinguishers are more popular, compared to the remaining Fire Protection Systems. You may identify them as red colour cylinders, seen generally at the doors. Fire Extinguishers come of a…
