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what are the advantages and disadvantages of speed control of 3 phase induction motor by varying frequency explain with drawing
2628draw the restricted earth fault protection circuit install on power transformer and identify its parameters and draw C/C curve of it
2683- two pumps must work with them at the same time but if the first pump start the second pump must delayed for some time to start also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it
2699Post New Electrical Engineering Questions
Why auxiliary transformers are not connected in parallel in primary stations?
what happen if the load connected to the induction motor is taken away? the same question for synchoronous generator in synch i think that the the exitation voltage will appear on the terminal only if so plz answer me
by what factor the starting current is used when comparing star and delta connection for motor starting?
what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.
what do w do when the output of generator is fluctuating?
According to conduit size which size wiring & how many wires can we provide wires in conduit & how can we select conduit size accordingly?
what is the Pickup/drop off ratio in BCPU relays
Dear all, how we select the cable size according to current with or without including different correction factor , is there any direct method for sizing of cable...
what are the industrail measures to over ferranti effect? how would the ferranti effect the power system if those remedial mearsure arent taken? how often does this effect occurs in real power system?
How to select the gauge of wire for winding of motors? How to select number of turns for winding of three phase induction motor?
What are the advantages of instrument transformer?
a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5
Describe the colour rendering properties of i) tungsten filament lamps ii) tubular fluorescent lamp
What is sensitivity of a measurement?
in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks
