Sulfur Hexafluoride Gas (SF6) Properties
Sulfur Hexafluoride Gas (SF6) Properties Heavy, chemically inert, non toxic No poisonous effect on the human body but decomposition products are poisonous Color
Switchgear & Protection
Switchgear & Protection
Advantages & Disadvantages of Oil Circuit Breakers
Oil circuit breakers are the oldest type of circuit breakers. The separating contacts of the oil circuit breakers are made
Functions of Instrument Transformers (CTs and PTs)
AC type protective relays are actuated by the current and voltage supplied by the current and potential (voltage) transformers which
Advantages & Disadvantages Electromagnetic Relays
In Electromagnetic relays operating current flows through the coil. When this operating current increases, coil energizes the electromagnet. When the
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.
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
Substation Safety Clearances
Majority of electrical substations will be air insulated type. All the electrical equipment live parts will be exposed .All the
Advantages and Disadvantages of Air Blast Circuit Breakers
In air blast circuit breakers, compressed air at a pressure of 20-30 kg/cm2 is employed as an arc quenching medium. Air
Creepage Distance for Insulators in Substation
Creepage Distance for Insulators: The creepage distance for insulators is the shortest distance along the insulator surface between the metal