how we identify AC or DC machine at the time of seeing, with
out use of name plate?

Answer Posted / umang

1.For the same rating of motor , size of DC machine is
larger than AC machine
2.DC machine is identified by commutator
3.DC motors contains brush arrangement which sq.cage motor
is not having .

Is This Answer Correct ?    4 Yes 1 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

HOW TO CALCULATE EARTHING SIZING?

1562


percetans

1711


What are the components connected in between the power supply coming from an electric pole to HT & LT Panels in a large commercial building or how the power supply connected from Electric pole to Transformer & then to the HT & LT panels of a building? Please send me answers via mail, my id is yogiagarwal@gmail.com. If possible, please give a line diagram.

1564


If rotor works in clock wise what happens

1449


What is force on a conductor in a magnetic field ?

620






what is mean by dual digital protection in the relay field?

1475


What is the dc grounding system and what is diff between AC/DC grounding system?

1630


Why star delta starter is preferred with induction motor?

634


How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?

1224


i need list of swg(standard wire guage) or area of conductor v/s current carrying capacity of conductor copper & alluminium...

1391


How they LT panel busbar size choose

1263


An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm

1757


What is the meaning of floating point earthing in battery backed systems ?

1483


what is the difference between delta delta and star delta connection transformer? why we use delta delta transformer since it need earthing transformer for grounding?

1628


If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?

1737