Answer Posted / archana

purpose of commutator is to produce continue current . if
commutator is placed we gft dc otherwise ac

Electrical Engineering

2126

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What are the advantages of nichols chart?

1364

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what is booster? and how it is connected in a circuit?

2690

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what is advertised hop count

1824

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. What is Electrical Life & Mechanical Life of Circuit Breaker? 2. What is Electrial Life & Mechanical Life of Magnetic Contactor? 3. What is RCD, RCCB & RCBO? 4. What is the Between defferance of RCD, RCCB & RCBO?

3400

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what will happen if earth of 33 kv cable (earthed system) is not connected to earthing pit?

2095

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What is cut-off rate?

1274

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Working of microwave oven?

2303

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how many electricity poles are there and what are the names and their sizes.

1968

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In HVDC LINE RECTIFIER CONTROL ON CONSTANT CURRENT AND INVERTER CONTROL CONSTANT EXITATION ANGLE CONTROL BUT HOW INVERTER CONTROL CONSTANT CURRENT?

2012

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There are different classes of protections in power plants.class a,b,c are clear..is there any class d and e r there..and elaborate class b protection.

2146

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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

2201

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gas turbine genrator reactances

2049

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raleigh method

2138

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How to measure the Harmonic Distortion of UPS ie THD?

2413

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