please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

1 Answers  

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In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

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my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.

3 Answers  

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if u have single phase load (un balance) and the main power cable is 3.5core means netural is .5 of phase and can the three phase current make the return paht in .5 neutral.

1 Answers  

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whu does the power factor of diesel generator always be 0.8. please explain

5 Answers   Dalkia,

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What is class ab operation?

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How can get electrical c licence.Now i am working in spining Mill , transformer capacity 2750kva. Sanction demand 2250kva. Please advise me . My contact no 09944226823

5 Answers   Pace Power Systems, VRVS, VSJ Industry,

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Define the overload capacity of the motor?

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sir, is there any ratio,this much of A.C volt is equal to D.C voltage

3 Answers  

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What happens if there is no nuetral in the power system?

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Why the colour of insulator is always is chocolate in colour?

3 Answers   Bhel,

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i installed 100kva ups. what KVA genset they should provid in input side? plz any update formula or ans with reason.

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