About ISOLATED NEUTRAL SYSTEM

List of experiment for Virtual Lab

VIRTUAL LAB List of Experiment to be performed (semester wise): 2nd Semester D.C.Circuits: A) To perform Ohm’s Law http://vlabs.iitkgp.ernet.in/be/exp4/index.html B) Verification of Thevenin’s Theorem http://vlabs.iitkgp.ernet.in/asnm/exp3/index.html C) Verification of Superposition Theorem http://vlabs.iitkgp.ernet.in/asnm/exp5/index.html 3rd Semester Electronics Circuits and Components (IIT KHARAGPUR): A) VI Characteristics of Diode http://vlabs.iitkgp.ernet.in/be/exp5/index.html B) Half Wave Rectification http://vlabs.iitkgp.ernet.in/be/exp6/index.html C) Full Wave Rectification http://vlabs.iitkgp.ernet.in/be/exp7/index.html D) Capacitive Rectification http://vlabs.iitkgp.ernet.in/be/exp8/index.html E) Zener Diode voltage regulator http://vlabs.iitkgp.ernet.in/be/exp10/index.html F) BJT Common Emitter Characteristics http://vlabs.iitkgp.ernet.in/be/exp11/index.html G) BJT Common Base Characteristics http://vlabs.iitkgp.ernet.in/be/e...

Types of Neutral grounding in distribution system

Types of Neutral Earthing in Power Distribution: Introduction: In the early power systems were mainly Neutral ungrounded due to the fact that the first ground fault did not require the tripping of the system. An unscheduled shutdown on the first ground fault was particularly undesirable for continuous process industries. These power systems required ground detection systems, but locating the fault often proved difficult. Although achieving the initial goal, the ungrounded system provided no control of transient over-voltages. A capacitive coupling exists between the system conductors and ground in a typical distribution system. As a result, this series resonant L-C circuit can create over-voltages well in excess of line-to-line voltage when subjected to repetitive re-strikes of one phase to ground. This in turn, reduces insulation life resulting in possible equipment failure. Neutral grounding systems are similar to fuses in that they do nothing until something in the syst...

CONSTRUCTION OF CABLE

Underground Cable – Introduction and Construction An underground cable essentially consists of one or more conductors covered with suitable insulation and surrounded by some protective layer. Normally, electric power can either be transmitted using over head lines or underground cables. But the use underground cable offers a variety of advantages. Some of the advantages are listed below. It is less liable to damage during storm or bad whether condition. Offers low maintenance cost. Less voltage drop during normal operating condition and less chance of fault. But the main disadvantage of underground cable is its cost of installation. For higher voltage the cost of cable increases due to greater requirement of insulation as compared to overhead lines. Therefore, it is installed in area or localities where overhead lines cannot be installed. Requirements of Underground Cable There are various types of cable available but the choice of particular type depends on the operating...

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