Answer / tariq

DC Series motor has high starting torque. We can not start
the Induction motor and Synchronous motors on load, but can
not start the DC series motor without load....

Answer / khursid allam khan

DC series motor has high starting torque..but it is not that
we cant start it without load,it is that we dont start it
without load beacuse its high speed will severly damage the
motor and may harm its sorrounding by breaking the parts..it
is very high speed..thats why it is used in traction where
high load is given to it

Answer / wayne king

SERIERS-WOUND

Answer / felixraj

IM > SM

Answer / dipak roy

It seems from the information available in the intenet that I have invented AC 3-phase squirrel cage Induction motor which has highest Starting Torque at its rated capacity, which may be from less than 1 KW to more than 1000 Kw. A prototype motor 1450 rpm of 7.5 Kw rated capacity has been tested on Test Bench to find that when such a motor is tested with Load Vs Speed graph produces 6.1 Kg.Mtr torque at 1200 rpm or 20% slip and average phase curren being 9.2 amp.,Under Locked Rotor Condition, 0 rpm, torque developed being 3.8 Kg.mtr, the average phase curren was 30.1 amp. But when the prototype motor was tested on the bench under Locked Rotor Condition (LRC) it produced torque of 7.3 Kg.mtr, average phase current being 27.8 amp. and at 1200 rpm it produced 3.1 Kg.mtr torque with average phase current of 9.4 amp. So AC 3-phase squirrel cage induction motor can very well be started with full load along with reduced Stator current or electrical consumption by about 8%. The prptotype was made and was being tested for development of 1000 hp traction motor for the locomotives of the Indian Railways

line tester lamp working in which voltage?

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What is super thermal power plant? and how it will differ from normal thermal power plant

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Dear sir,how should i set the relay in star delta starter..say ex i am having 4ohp motor,,wht should be the relay setting...?

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function of soft starter .

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Dear all, i completed M.E(Power Electronics & Drives) 2011 passed out having 78% so i need job in core side but i don't know how can i receive the calls from electrical companies and i uploaded my CV in naukri, times jobs etc.. In that iam not recieved any mails from good companies so give me best procedure plzzzzzzzzzzzzzzzzzzzzzzzz..... Thanks, K.Linga Reddy Email-id:-lingareddykmthm@gmail.com Ph no:-08015402078

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Questions :- HR- Q.1 about yourself & family background ? Q.2 Why u choose Power sector as ur carrier starting not any other sector ?? Q. 3 What think abt NTPC ? Techincal Questions:- Q.1 about Vocational Training……What u did , see the main equipments….etc Q.2 Why a transformer Noise during its running condition ? Q.3 about transformer oil material & Test name for the measurement of its dielectric strength & wht will u do if its dielectric strength goes low ? ……..some discussion type ? Q.4 What is relation between transmission lines & Communication lines ? Q.5 Which Machine u will prefer to use at a place where flammable gases are coming out & why ? Q.6 how fault in an electric system is detected & hw protection of equipments is done ? Q.7 Why we didn’t feel electric shock in an electric train ?? Q.8 Anything u want to ask from us ??

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why the inserting resistance in wound rotor induction motor decrease the starting current and increase the starting torque

2 Answers  

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What is the reason behind 11kv 33kv 132kv.....means multiple of 11?

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what is meant by directional earth fault and non directional earth fault? describe both.

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why we do not switched on capicitor panel with DG Supply

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How the starter control the starting current in three phase AC Motor?(In DC apply the reistance).

6 Answers  

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