Answer Posted / shantanu dash
The cable size of a motor mainly depends on the following
factors.
(i) Rated Current of Motor
(ii) Starting current and starting time of the Motor on
load.
(iii) Type of starters used for starting the Motor
| Is This Answer Correct ? | 75 Yes | 1 No |
Post New Answer View All Answers
Hello to all, Please someone can send me HPCL ELECTRICAL Engg. Sample papers to me? Its urjent....my email address is.... raviasiapacific@gmail.com
What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side
Why it is necessary to isolate fire fighting when you are taking shutdown for lv board.
Define the three phase formula fuse.
Why efficiency in thermal power plant is low?
How to calculate the Harmonics losses in terms of cost/unit.
What is the role of feedback in a closed loop control system?
When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number
what are the analog quality input for protection function?what are minimum reqiments?
what is cascade speed control device?and how this device control the speed of motors?
How will you utilise electrical power? You can start from the generating station.
-What should be minimum value of insulation resistance and maximum value of earth resistance at any electrical instillation and what is method of testing the same.
what happens in the short circuited secondary transformer,if the resistance of the short circuit is increased gradually?
How vfd saving power.
please give me all the Alarm .Trip ,Safety Relays & Conditions of Diesel-generators mail me on ashokbabunhce@gmail.com