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isolation transformer
why isolation tranformer used in mcc panel?
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What is welding transformer ?
why we use it in welding and what is the difference in welding and ordinary transformer?
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CT Earthing
Why ct earthing should be connected at one end only? if ,we connect more than one end means what will happen?
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Motor Vibration
What can be the possible causes of Vibration in HT motors?
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Potential Transformers Applications
What are the applications of potential transformers other than metering and under voltage protection?
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Power Plant
What is the processing of power plant and what are the equipment used for coal handling power plant?
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Reactive Power
How much reactive power does a generator of rating 3.5MW generate?
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DG Set Tripp
What will you do when D.G. set gets tripped?
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Neutral Circuit and Core Balance Circuit Protection
What is the difference between neutral circuit and core balance circuit protection?
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Alternator capacity
Is it possible to increase the capacity of a synchronous generator upto 30% to 50% just to modify the cooling system but the other component remain same? Explain
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Transformer Taping
Why tapings of Transformer is always provided on HT side? why not on LT side?
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Transformer Capacity
If the capacity of a Transformer is 20/26 then what does 20/26 shows? what is its purpose?
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Alternator Regulation
Why most of the alternator is connected in star and have high regulation around 30% as compared to transformer?
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3 Phase
Why there is 220v in 1-phase but 440v in 3-phase?
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Phase Identification
In a three phase system three wires are of colour red, yellow and blue are used to discriminate each phase. Now how will you identify each phase wire without knowing the colour and without any pre information?
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Single Phase Induction Motors
Why capacitors are used in 1 phase induction motors?
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Skin Effect
What do you mean by skin effect?
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Current Transformer Protection Class
What is the 5p 10 , burden in current transformer?
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Neutral ct
Why do we use neutral ct in a transformer?
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Motor Rating
Can we use a 15kW, 1450rpm motor for 15kW, 960rpm apllication?If yes, what will be the drawbacks?
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Electrical Transducer
What is the fuction of electrical current transducer, voltage transducer in control panel?
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Distance Between R,Y,B wire
What is the distance between R, Y and B wires when the line is going from one sub-station to another sub-station?
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Wattmeter reading
Why does wattmeter's reading go negative?
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DC supply to Transformer
Why the transformer will burn if DC supply is given?
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Syncronous Machines Slip
In syncronous machines, less slip is useful or more slip is useful? Why?
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motor
what is the testing of h.t and l.t. motors before erection and commissioning?
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Electrical Engineer Interview
1. what is the different between CGS system and MKS system? 2. When we connect the capacitor Banks in Series with the circuit 3. What is the difference between Earthing & grounding 4. how much voltage is present in neutral resistance?and how much voltage is present in earth resistance... 5. What is the purpose of calculating knee point voltage for Current transformers? 6. What is the voltage drop for...
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