Substation

What is GFCI or GFI? A ground fault circuit interrupter, called a GFCI or GFI, is an inexpensive electrical switchgear ...
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The auto reclosing of power lines has become a generally accepted practice. Reports from different parts of the world show ...
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QO stands for Qwik-Open. Square D QO Circuit Breakers are fastest tripping circuit breakers at 1/60th of a second. QO™ ...
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This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The ...
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What is a Circuit Breaker? As the name indicates, circuit breaker means the device which breaks (Open) the circuit under the ...
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  The assembly of the apparatus used to change some characteristic (e.g. voltage, a.c. to d.c., frequency, p.f etc.) of ...
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The terms ‘Switchgear’ and ‘Motor Control Centres’ are used in general to describe combinations of enclosures, busbars, circuit breakers, power ...
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It is fair to say that without discriminative protection it would be impossible to operate a modern power system. The ...
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Gas insulated substations (GIS) have been used in power systems over the last three decades because of their high reliability, ...
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As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed as ...
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A fuse protects an electrical circuit or device from excessive current when a metal element inside it melts to create an ...
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We have already given an introduction to substation earthing system in an article published earlier. Today we are going to ...
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Communication plays an important role in the real time operation of a power system. In the beginning, telephone was used ...
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In oil circuit breakers, some insulating oil (e.g., transformer oil) is used as an arc quenching medium. Working Principle of ...
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1. What is a Circuit Breaker?Circuit Breaker is a mechanical device designed to close or open contact members, thus closing ...
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What is Load Forecasting? Electrical energy cannot currently be stored in large amounts. It has to be generated whenever there ...
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Related TopicsSwitchgear - ComponentsCircuit Breaker - OperationArching PhenomenonMethods of Arc ExtinctionTypes of Circuit BreakersOil Circuit BreakerAir Blast Circuit BreakerAir Circuit ...
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What is Corona? The phenomenon of violet glow, hissing noise and production of ozone gas in an overhead transmission line is ...
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What is IEC 61850?IEC 61850 is a standard for the design of electrical substation automation. It is the base for ...
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The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear. Switchgears are the switching ...
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What is Switchgear? The apparatus used for switching, controlling and protecting the electrical circuits and equipment is known as switchgear ...
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Each year as line and system loading increase and more operating companies superimpose higher voltage transmission systems on existing facilities, ...
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What is a RCD? A Residual Current Device (RCCB, ELCB, RCBO etc.) is a device that is designed to provide ...
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Related TopicsSwitchgear - ComponentsCircuit Breaker - OperationArching PhenomenonMethods of Arc ExtinctionTypes of Circuit BreakersOil Circuit BreakerAir Blast Circuit BreakerAir Circuit ...
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Part 1Part 2Part 3Part 4Part 51. A circuit breaker is(A) power factor correcting device(B) a device to neutralize the effect ...
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What is an ACB? A circuit breaker in which the contacts open and close in air at atmospheric pressure is ...
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What is VCB? VCB stands for Vacuum Circuit Breaker. In vacuum circuit breakers, the vacuum is used as the arc quenching ...
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What is MCB? MCB or Miniature Circuit Breaker is an electromechanical device which protects an electric circuit from an overcurrent. The ...
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In an SF6 Circuit breaker, sulphur hexafluoride gas is used as the arc quenching medium. The sulphur hexafluoride gas (SF6) is ...
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The most appropriate type of substation depends on such factors as voltage level, load capacity, environmental considerations, site space limitations, ...
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Related TopicsSwitchgear - ComponentsCircuit Breaker - OperationArching PhenomenonMethods of Arc ExtinctionTypes of Circuit BreakersOil Circuit BreakerAir Blast Circuit BreakerAir Circuit ...
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Overvoltages may cause burning of insulation of substation equipment if not well protected. Lightning is one of the most serious ...
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Part 1Part 2Part 3Part 4Part 516. Out of the following circuit breakers, which one has the lowest voltage range ?(A) ...
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Air blast circuit breakers employ a high-pressure air blast as an arc quenching medium. The classification and working of different ...
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A circuit breaker is a switching device which can be operated manually as well as automatically for controlling and protection ...
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The operating principle and arc forming phenomenon was explained in the previous article. Now it is very important to extinct ...
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The substation grounding system comprises of a grid (earth mat) formed by a horizontal buried conductors. Read about design of ...
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The Capacitor Voltage Transformer (CVT) or Capacitor Coupled Voltage Transformer (CCVT) is a switchgear device used to convert high transmission ...
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